Format split test files

Formats the recently split FSTestOSWrapper test files. Indentation
somehow got changed during the splitting process.

Bug: 436025865
Change-Id: If1c2b3338ae6f7af0b6ae9a0b5a572bdae16513a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/276822
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@google.com>
diff --git a/tools/src/oswrapper/fstestoswrapper_common_test.go b/tools/src/oswrapper/fstestoswrapper_common_test.go
index 8de6041..4fd8de6 100644
--- a/tools/src/oswrapper/fstestoswrapper_common_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_common_test.go
@@ -27,16 +27,16 @@
 package oswrapper_test
 
 import (
-  "errors"
-  "os"
-  "path/filepath"
-  "runtime"
-  "syscall"
-  "testing"
-  "testing/fstest"
+	"errors"
+	"os"
+	"path/filepath"
+	"runtime"
+	"syscall"
+	"testing"
+	"testing/fstest"
 
-  "dawn.googlesource.com/dawn/tools/src/oswrapper"
-  "github.com/stretchr/testify/require"
+	"dawn.googlesource.com/dawn/tools/src/oswrapper"
+	"github.com/stretchr/testify/require"
 )
 
 // Common code used by tests for fstestoswrapper.go.
@@ -46,70 +46,70 @@
 // stringPtr is a helper to get a pointer to a string, used so test cases can have nil to indicate a
 // string value isn't set, instead of testing for "".
 func stringPtr(s string) *string {
-  return &s
+	return &s
 }
 
 // getTestRoot returns the standard root path for the current OS.
 func getTestRoot() string {
-  if runtime.GOOS == "windows" {
-    return "C:\\"
-  }
-  return "/"
+	if runtime.GOOS == "windows" {
+		return "C:\\"
+	}
+	return "/"
 }
 
 // --- Unittest specific helpers ---
 
 // unittestSetup is a helper for setting up the FSTestOSWrapper for an unittest.
 type unittestSetup struct {
-  initialFiles    map[string]string
-  initialDirs     []string
-  initialSymlinks map[string]string // map[linkPath]targetPath
+	initialFiles    map[string]string
+	initialDirs     []string
+	initialSymlinks map[string]string // map[linkPath]targetPath
 }
 
 // setup initializes the FSTestOSWrapper with the files and directories specified
 // in the unittestSetup struct.
 func (s unittestSetup) setup(t *testing.T) oswrapper.FSTestOSWrapper {
-  t.Helper()
-  testFS := oswrapper.CreateFSTestOSWrapper()
+	t.Helper()
+	testFS := oswrapper.CreateFSTestOSWrapper()
 
-  for path, content := range s.initialFiles {
-    require.NoError(t, testFS.MkdirAll(filepath.Dir(path), 0755))
-    require.NoError(t, testFS.WriteFile(path, []byte(content), 0666))
-  }
-  for _, path := range s.initialDirs {
-    require.NoError(t, testFS.MkdirAll(path, 0755))
-  }
-  for linkPath, targetPath := range s.initialSymlinks {
-    require.NoError(t, testFS.MkdirAll(filepath.Dir(linkPath), 0755))
-    require.NoError(t, testFS.Symlink(targetPath, linkPath))
-  }
-  return testFS
+	for path, content := range s.initialFiles {
+		require.NoError(t, testFS.MkdirAll(filepath.Dir(path), 0755))
+		require.NoError(t, testFS.WriteFile(path, []byte(content), 0666))
+	}
+	for _, path := range s.initialDirs {
+		require.NoError(t, testFS.MkdirAll(path, 0755))
+	}
+	for linkPath, targetPath := range s.initialSymlinks {
+		require.NoError(t, testFS.MkdirAll(filepath.Dir(linkPath), 0755))
+		require.NoError(t, testFS.Symlink(targetPath, linkPath))
+	}
+	return testFS
 }
 
 // expectedError is a helper struct for testing error conditions.
 // Note: This is meant for usage in the non-*_MatchesReal unittests.
 type expectedError struct {
-  wantErrIs  error
-  wantErrMsg string
+	wantErrIs  error
+	wantErrMsg string
 }
 
 // Check verifies that the given error `err` matches the expected error conditions.
 // It returns true if an error was expected and found, indicating the test should stop.
 func (e expectedError) Check(t *testing.T, err error) (stopTest bool) {
-  t.Helper()
-  if e.wantErrIs == nil && e.wantErrMsg == "" {
-    require.NoError(t, err)
-    return false
-  }
+	t.Helper()
+	if e.wantErrIs == nil && e.wantErrMsg == "" {
+		require.NoError(t, err)
+		return false
+	}
 
-  require.Error(t, err)
-  if e.wantErrIs != nil {
-    require.ErrorIs(t, err, e.wantErrIs)
-  }
-  if e.wantErrMsg != "" {
-    require.ErrorContains(t, err, e.wantErrMsg)
-  }
-  return true
+	require.Error(t, err)
+	if e.wantErrIs != nil {
+		require.ErrorIs(t, err, e.wantErrIs)
+	}
+	if e.wantErrMsg != "" {
+		require.ErrorContains(t, err, e.wantErrMsg)
+	}
+	return true
 }
 
 // --- *_MatchesReal specific helpers ---
@@ -118,92 +118,92 @@
 // matches against the real OS.
 // Note: This is meant for usage in the *_MatchesReal tests.
 type matchesRealSetup struct {
-  unittestSetup
+	unittestSetup
 }
 
 // setup creates a temporary directory for the real OS, and initializes both the
 // real and test filesystems with the files and directories specified in the
 // matchesRealSetup struct.
 func (s matchesRealSetup) setup(t *testing.T) (string, oswrapper.OSWrapper, oswrapper.FSTestOSWrapper) {
-  t.Helper()
+	t.Helper()
 
-  // Setup the test wrapper using the embedded setup method.
-  testFS := s.unittestSetup.setup(t)
+	// Setup the test wrapper using the embedded setup method.
+	testFS := s.unittestSetup.setup(t)
 
-  // Setup the real FS
-  realRoot, err := os.MkdirTemp("", "real_fs_test_*")
-  require.NoError(t, err)
-  realFS := oswrapper.GetRealOSWrapper()
+	// Setup the real FS
+	realRoot, err := os.MkdirTemp("", "real_fs_test_*")
+	require.NoError(t, err)
+	realFS := oswrapper.GetRealOSWrapper()
 
-  for path, content := range s.initialFiles {
-    realPath := filepath.Join(realRoot, path)
-    require.NoError(t, os.MkdirAll(filepath.Dir(realPath), 0755))
-    require.NoError(t, os.WriteFile(realPath, []byte(content), 0666))
-  }
-  for _, path := range s.initialDirs {
-    require.NoError(t, os.MkdirAll(filepath.Join(realRoot, path), 0755))
-  }
-  for linkPath, targetPath := range s.initialSymlinks {
-    realPath := filepath.Join(realRoot, linkPath)
-    require.NoError(t, os.MkdirAll(filepath.Dir(realPath), 0755))
-    require.NoError(t, os.Symlink(targetPath, realPath))
-  }
+	for path, content := range s.initialFiles {
+		realPath := filepath.Join(realRoot, path)
+		require.NoError(t, os.MkdirAll(filepath.Dir(realPath), 0755))
+		require.NoError(t, os.WriteFile(realPath, []byte(content), 0666))
+	}
+	for _, path := range s.initialDirs {
+		require.NoError(t, os.MkdirAll(filepath.Join(realRoot, path), 0755))
+	}
+	for linkPath, targetPath := range s.initialSymlinks {
+		realPath := filepath.Join(realRoot, linkPath)
+		require.NoError(t, os.MkdirAll(filepath.Dir(realPath), 0755))
+		require.NoError(t, os.Symlink(targetPath, realPath))
+	}
 
-  return realRoot, realFS, testFS
+	return realRoot, realFS, testFS
 }
 
 // requireFileSystemsMatch walks the real filesystem at realRoot and compares its
 // structure and file content against the provided FSTestOSWrapper.
 // Note: This is meant for usage in *_MatchesReal tests.
 func requireFileSystemsMatch(t *testing.T, realRoot string, testFS oswrapper.FSTestOSWrapper) {
-  t.Helper()
+	t.Helper()
 
-  realMap := make(map[string]*fstest.MapFile)
-  // We use filepath.Walk which uses Lstat, so we see symlinks.
-  err := filepath.Walk(realRoot, func(path string, info os.FileInfo, err error) error {
-    require.NoError(t, err)
-    if path == realRoot {
-      return nil
-    }
+	realMap := make(map[string]*fstest.MapFile)
+	// We use filepath.Walk which uses Lstat, so we see symlinks.
+	err := filepath.Walk(realRoot, func(path string, info os.FileInfo, err error) error {
+		require.NoError(t, err)
+		if path == realRoot {
+			return nil
+		}
 
-    relPath, err := filepath.Rel(realRoot, path)
-    require.NoError(t, err)
+		relPath, err := filepath.Rel(realRoot, path)
+		require.NoError(t, err)
 
-    // Use the same path cleaning logic as FSTestOSWrapper.
-    mapKey := testFS.FSTestFilesystemReaderWriter.CleanPath(relPath)
+		// Use the same path cleaning logic as FSTestOSWrapper.
+		mapKey := testFS.FSTestFilesystemReaderWriter.CleanPath(relPath)
 
-    mapFile := &fstest.MapFile{Mode: info.Mode()}
-    if info.Mode()&os.ModeSymlink != 0 {
-      target, err := os.Readlink(path)
-      require.NoError(t, err)
-      mapFile.Data = []byte(target)
-    } else if !info.IsDir() {
-      data, err := os.ReadFile(path)
-      require.NoError(t, err)
-      mapFile.Data = data
-    }
-    realMap[mapKey] = mapFile
-    return nil
-  })
-  require.NoError(t, err)
+		mapFile := &fstest.MapFile{Mode: info.Mode()}
+		if info.Mode()&os.ModeSymlink != 0 {
+			target, err := os.Readlink(path)
+			require.NoError(t, err)
+			mapFile.Data = []byte(target)
+		} else if !info.IsDir() {
+			data, err := os.ReadFile(path)
+			require.NoError(t, err)
+			mapFile.Data = data
+		}
+		realMap[mapKey] = mapFile
+		return nil
+	})
+	require.NoError(t, err)
 
-  testMap := testFS.FS
-  require.Len(t, testMap, len(realMap), "Filesystems have a different number of entries")
+	testMap := testFS.FS
+	require.Len(t, testMap, len(realMap), "Filesystems have a different number of entries")
 
-  for key, realFile := range realMap {
-    testFile, ok := testMap[key]
-    require.True(t, ok, "Path '%s' exists in real FS but not in FS under test", key)
+	for key, realFile := range realMap {
+		testFile, ok := testMap[key]
+		require.True(t, ok, "Path '%s' exists in real FS but not in FS under test", key)
 
-    // Compare file modes. Note: fs.FS doesn't strictly guarantee strict equality of all bits,
-    // but for our purposes (Dir, Symlink, Perms) they should match.
-    // However, fstest.MapFS might normalize modes.
-    require.Equal(t, realFile.Mode.IsDir(), testFile.Mode.IsDir(), "IsDir mismatch for '%s'", key)
-    require.Equal(t, realFile.Mode&os.ModeSymlink, testFile.Mode&os.ModeSymlink, "IsSymlink mismatch for '%s'", key)
+		// Compare file modes. Note: fs.FS doesn't strictly guarantee strict equality of all bits,
+		// but for our purposes (Dir, Symlink, Perms) they should match.
+		// However, fstest.MapFS might normalize modes.
+		require.Equal(t, realFile.Mode.IsDir(), testFile.Mode.IsDir(), "IsDir mismatch for '%s'", key)
+		require.Equal(t, realFile.Mode&os.ModeSymlink, testFile.Mode&os.ModeSymlink, "IsSymlink mismatch for '%s'", key)
 
-    if !realFile.Mode.IsDir() {
-      require.Equal(t, realFile.Data, testFile.Data, "Content/Target mismatch for '%s'", key)
-    }
-  }
+		if !realFile.Mode.IsDir() {
+			require.Equal(t, realFile.Data, testFile.Data, "Content/Target mismatch for '%s'", key)
+		}
+	}
 }
 
 // requireErrorsMatch asserts that the real and test errors are compatible.
@@ -211,25 +211,25 @@
 // must be the same. Otherwise, it just checks that both are non-nil.
 // Note: This is meant for usage in *_MatchesReal tests.
 func requireErrorsMatch(t *testing.T, realErr, testErr error) {
-  t.Helper()
-  if realErr != nil {
-    require.Error(t, testErr, "Real FS errored but FS under test did not.\nReal error: %v", realErr)
+	t.Helper()
+	if realErr != nil {
+		require.Error(t, testErr, "Real FS errored but FS under test did not.\nReal error: %v", realErr)
 
-    // For certain well-defined errors, we expect the test wrapper to return
-    // the exact same error type.
-    if errors.Is(realErr, os.ErrNotExist) {
-      require.ErrorIs(t, testErr, os.ErrNotExist, "Real error is os.ErrNotExist, but test error is not")
-    } else if errors.Is(realErr, os.ErrExist) {
-      require.ErrorIs(t, testErr, os.ErrExist, "Real error is os.ErrExist, but test error is not")
-    } else if errors.Is(realErr, syscall.ENOTEMPTY) {
-      require.ErrorIs(t, testErr, syscall.ENOTEMPTY, "Real error is syscall.ENOTEMPTY, but test error is not")
-    } else if errors.Is(realErr, os.ErrClosed) {
-      require.ErrorIs(t, testErr, os.ErrClosed, "Real error is os.ErrClosed, but test error is not")
-    }
-    // For other errors (e.g., 'is a directory', 'directory not empty'),
-    // the exact error message can be OS-dependent. In these cases, just
-    // checking that *an* error occurred is sufficient.
-  } else {
-    require.NoError(t, testErr, "FS under test errored but Real FS did not.\nTest error: %v", testErr)
-  }
-}
\ No newline at end of file
+		// For certain well-defined errors, we expect the test wrapper to return
+		// the exact same error type.
+		if errors.Is(realErr, os.ErrNotExist) {
+			require.ErrorIs(t, testErr, os.ErrNotExist, "Real error is os.ErrNotExist, but test error is not")
+		} else if errors.Is(realErr, os.ErrExist) {
+			require.ErrorIs(t, testErr, os.ErrExist, "Real error is os.ErrExist, but test error is not")
+		} else if errors.Is(realErr, syscall.ENOTEMPTY) {
+			require.ErrorIs(t, testErr, syscall.ENOTEMPTY, "Real error is syscall.ENOTEMPTY, but test error is not")
+		} else if errors.Is(realErr, os.ErrClosed) {
+			require.ErrorIs(t, testErr, os.ErrClosed, "Real error is os.ErrClosed, but test error is not")
+		}
+		// For other errors (e.g., 'is a directory', 'directory not empty'),
+		// the exact error message can be OS-dependent. In these cases, just
+		// checking that *an* error occurred is sufficient.
+	} else {
+		require.NoError(t, testErr, "FS under test errored but Real FS did not.\nTest error: %v", testErr)
+	}
+}
diff --git a/tools/src/oswrapper/fstestoswrapper_environ_test.go b/tools/src/oswrapper/fstestoswrapper_environ_test.go
index 42adeae..5ce7e2f 100644
--- a/tools/src/oswrapper/fstestoswrapper_environ_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_environ_test.go
@@ -27,12 +27,12 @@
 package oswrapper_test
 
 import (
-  "os"
-  "runtime"
-  "testing"
+	"os"
+	"runtime"
+	"testing"
 
-  "dawn.googlesource.com/dawn/tools/src/oswrapper"
-  "github.com/stretchr/testify/require"
+	"dawn.googlesource.com/dawn/tools/src/oswrapper"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the environ-related components of FSTestOSWrapper.
@@ -44,49 +44,49 @@
 // defined expectations.
 
 func TestCreateFSTestOSWrapperWithRealEnv_MatchesReal(t *testing.T) {
-  testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
+	testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
 
-  for key, testVal := range testWrapper.EnvMap() {
-    if key == "PWD" || key == "HOME" {
-      // PWD and HOME are handled below
-      continue
-    }
+	for key, testVal := range testWrapper.EnvMap() {
+		if key == "PWD" || key == "HOME" {
+			// PWD and HOME are handled below
+			continue
+		}
 
-    realVal := os.Getenv(key)
-    require.Equal(t, realVal, testVal, "environment variable '%s' should match real env", key)
-  }
+		realVal := os.Getenv(key)
+		require.Equal(t, realVal, testVal, "environment variable '%s' should match real env", key)
+	}
 
-  // PWD and HOME may not be set in the real environment, but FSTestEnvironProvider sets them
-  // based on the appropriate os calls.
-  realWd, realWdErr := os.Getwd()
-  if realWdErr == nil {
-    testWd, testWdErr := testWrapper.Getwd()
-    require.NoError(t, testWdErr, "Getwd() should not fail if real Getwd() succeeds")
-    require.Equal(t, realWd, testWd, "PWD should match real working directory")
-  }
+	// PWD and HOME may not be set in the real environment, but FSTestEnvironProvider sets them
+	// based on the appropriate os calls.
+	realWd, realWdErr := os.Getwd()
+	if realWdErr == nil {
+		testWd, testWdErr := testWrapper.Getwd()
+		require.NoError(t, testWdErr, "Getwd() should not fail if real Getwd() succeeds")
+		require.Equal(t, realWd, testWd, "PWD should match real working directory")
+	}
 
-  realHome, realHomeErr := os.UserHomeDir()
-  if realHomeErr == nil {
-    testHome, testHomeErr := testWrapper.UserHomeDir()
-    require.NoError(t, testHomeErr, "UserHomeDir() should not fail if real UserHomeDir() succeeds")
-    require.Equal(t, realHome, testHome, "HOME should match real user home directory")
-  }
+	realHome, realHomeErr := os.UserHomeDir()
+	if realHomeErr == nil {
+		testHome, testHomeErr := testWrapper.UserHomeDir()
+		require.NoError(t, testHomeErr, "UserHomeDir() should not fail if real UserHomeDir() succeeds")
+		require.Equal(t, realHome, testHome, "HOME should match real user home directory")
+	}
 }
 
 func TestFSTestEnvironProvider_Environ(t *testing.T) {
-  t.Run("Empty environment", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    env := wrapper.Environ()
-    require.Empty(t, env)
-  })
+	t.Run("Empty environment", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		env := wrapper.Environ()
+		require.Empty(t, env)
+	})
 
-  t.Run("With variables", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    wrapper.Setenv("FOO", "bar")
-    wrapper.Setenv("BAZ", "qux")
-    env := wrapper.Environ()
-    require.ElementsMatch(t, []string{"FOO=bar", "BAZ=qux"}, env)
-  })
+	t.Run("With variables", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		wrapper.Setenv("FOO", "bar")
+		wrapper.Setenv("BAZ", "qux")
+		env := wrapper.Environ()
+		require.ElementsMatch(t, []string{"FOO=bar", "BAZ=qux"}, env)
+	})
 }
 
 // TestFSTestEnvironProvider_Environ_MatchesReal is not implemented, since the test version inserts
@@ -96,119 +96,119 @@
 // TestCreateFSTestOSWrapperWithRealEnv_MatchesReal
 
 func TestFSTestEnvironProvider_Getenv(t *testing.T) {
-  wrapper := oswrapper.CreateFSTestOSWrapper()
-  wrapper.Setenv("EXISTING_VAR", "value")
+	wrapper := oswrapper.CreateFSTestOSWrapper()
+	wrapper.Setenv("EXISTING_VAR", "value")
 
-  t.Run("Get existing variable", func(t *testing.T) {
-    val := wrapper.Getenv("EXISTING_VAR")
-    require.Equal(t, "value", val)
-  })
+	t.Run("Get existing variable", func(t *testing.T) {
+		val := wrapper.Getenv("EXISTING_VAR")
+		require.Equal(t, "value", val)
+	})
 
-  t.Run("Get non-existent variable", func(t *testing.T) {
-    val := wrapper.Getenv("NON_EXISTENT_VAR")
-    require.Empty(t, val)
-  })
+	t.Run("Get non-existent variable", func(t *testing.T) {
+		val := wrapper.Getenv("NON_EXISTENT_VAR")
+		require.Empty(t, val)
+	})
 }
 
 func TestFSTestEnvironProvider_Getenv_MatchesReal(t *testing.T) {
-  realWrapper := oswrapper.GetRealOSWrapper()
-  testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
+	realWrapper := oswrapper.GetRealOSWrapper()
+	testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
 
-  t.Run("existing variable", func(t *testing.T) {
-    // Test a variable that is likely to exist
-    var existingVar string
-    if runtime.GOOS == "windows" {
-      existingVar = "SystemRoot"
-    } else {
-      existingVar = "PATH"
-    }
+	t.Run("existing variable", func(t *testing.T) {
+		// Test a variable that is likely to exist
+		var existingVar string
+		if runtime.GOOS == "windows" {
+			existingVar = "SystemRoot"
+		} else {
+			existingVar = "PATH"
+		}
 
-    realVal, realExists := os.LookupEnv(existingVar)
-    if !realExists {
-      t.Skipf("Skipping test as environment variable '%s' is not set", existingVar)
-    }
+		realVal, realExists := os.LookupEnv(existingVar)
+		if !realExists {
+			t.Skipf("Skipping test as environment variable '%s' is not set", existingVar)
+		}
 
-    testVal := testWrapper.Getenv(existingVar)
-    require.Equal(t, realVal, testVal, "Value for existing var '%s' should match", existingVar)
-    require.NotEmpty(t, realVal, "Expected existing var '%s' to be non-empty", existingVar)
-  })
+		testVal := testWrapper.Getenv(existingVar)
+		require.Equal(t, realVal, testVal, "Value for existing var '%s' should match", existingVar)
+		require.NotEmpty(t, realVal, "Expected existing var '%s' to be non-empty", existingVar)
+	})
 
-  t.Run("non-existent variable", func(t *testing.T) {
-    // Test a variable that is unlikely to exist
-    nonExistentVar := "THIS_VAR_SHOULD_NOT_EXIST_IN_TEST_ENV"
-    if _, realExists := os.LookupEnv(nonExistentVar); realExists {
-      t.Skipf("Skipping test as environment variable '%s' is unexpectedly set", nonExistentVar)
-    }
+	t.Run("non-existent variable", func(t *testing.T) {
+		// Test a variable that is unlikely to exist
+		nonExistentVar := "THIS_VAR_SHOULD_NOT_EXIST_IN_TEST_ENV"
+		if _, realExists := os.LookupEnv(nonExistentVar); realExists {
+			t.Skipf("Skipping test as environment variable '%s' is unexpectedly set", nonExistentVar)
+		}
 
-    realVal := realWrapper.Getenv(nonExistentVar)
-    testVal := testWrapper.Getenv(nonExistentVar)
-    require.Equal(t, realVal, testVal, "Value for non-existent var should match")
-    require.Empty(t, realVal, "Expected non-existent var to be empty")
-  })
+		realVal := realWrapper.Getenv(nonExistentVar)
+		testVal := testWrapper.Getenv(nonExistentVar)
+		require.Equal(t, realVal, testVal, "Value for non-existent var should match")
+		require.Empty(t, realVal, "Expected non-existent var to be empty")
+	})
 }
 
 func TestFSTestEnvironProvider_Getwd(t *testing.T) {
-  t.Run("PWD is set", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    wrapper.Setenv("PWD", "/my/test/dir")
-    wd, err := wrapper.Getwd()
-    require.NoError(t, err)
-    require.Equal(t, "/my/test/dir", wd)
-  })
+	t.Run("PWD is set", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		wrapper.Setenv("PWD", "/my/test/dir")
+		wd, err := wrapper.Getwd()
+		require.NoError(t, err)
+		require.Equal(t, "/my/test/dir", wd)
+	})
 
-  t.Run("PWD is not set", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    _, err := wrapper.Getwd()
-    require.Error(t, err)
-    require.ErrorIs(t, err, oswrapper.ErrPwdNotSet)
-  })
+	t.Run("PWD is not set", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		_, err := wrapper.Getwd()
+		require.Error(t, err)
+		require.ErrorIs(t, err, oswrapper.ErrPwdNotSet)
+	})
 }
 
 func TestFSTestEnvironProvider_Getwd_MatchesReal(t *testing.T) {
-  realWrapper := oswrapper.GetRealOSWrapper()
-  testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
+	realWrapper := oswrapper.GetRealOSWrapper()
+	testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
 
-  realWd, realErr := realWrapper.Getwd()
-  testWd, testErr := testWrapper.Getwd()
+	realWd, realErr := realWrapper.Getwd()
+	testWd, testErr := testWrapper.Getwd()
 
-  // os.Getwd() can fail in some environments
-  if realErr != nil {
-    require.Error(t, testErr)
-  } else {
-    require.NoError(t, testErr)
-    require.Equal(t, realWd, testWd)
-  }
+	// os.Getwd() can fail in some environments
+	if realErr != nil {
+		require.Error(t, testErr)
+	} else {
+		require.NoError(t, testErr)
+		require.Equal(t, realWd, testWd)
+	}
 }
 
 func TestFSTestEnvironProvider_UserHomeDir(t *testing.T) {
-  t.Run("HOME is set", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    wrapper.Setenv("HOME", "/home/user")
-    home, err := wrapper.UserHomeDir()
-    require.NoError(t, err)
-    require.Equal(t, "/home/user", home)
-  })
+	t.Run("HOME is set", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		wrapper.Setenv("HOME", "/home/user")
+		home, err := wrapper.UserHomeDir()
+		require.NoError(t, err)
+		require.Equal(t, "/home/user", home)
+	})
 
-  t.Run("HOME is not set", func(t *testing.T) {
-    wrapper := oswrapper.CreateFSTestOSWrapper()
-    _, err := wrapper.UserHomeDir()
-    require.Error(t, err)
-    require.ErrorIs(t, err, oswrapper.ErrHomeNotSet)
-  })
+	t.Run("HOME is not set", func(t *testing.T) {
+		wrapper := oswrapper.CreateFSTestOSWrapper()
+		_, err := wrapper.UserHomeDir()
+		require.Error(t, err)
+		require.ErrorIs(t, err, oswrapper.ErrHomeNotSet)
+	})
 }
 
 func TestFSTestEnvironProvider_UserHomeDir_MatchesReal(t *testing.T) {
-  realWrapper := oswrapper.GetRealOSWrapper()
-  testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
+	realWrapper := oswrapper.GetRealOSWrapper()
+	testWrapper := oswrapper.CreateFSTestOSWrapperWithRealEnv()
 
-  realHome, realErr := realWrapper.UserHomeDir()
-  testHome, testErr := testWrapper.UserHomeDir()
+	realHome, realErr := realWrapper.UserHomeDir()
+	testHome, testErr := testWrapper.UserHomeDir()
 
-  // os.UserHomeDir can fail in some environments
-  if realErr != nil {
-    require.Error(t, testErr)
-  } else {
-    require.NoError(t, testErr)
-    require.Equal(t, realHome, testHome)
-  }
-}
\ No newline at end of file
+	// os.UserHomeDir can fail in some environments
+	if realErr != nil {
+		require.Error(t, testErr)
+	} else {
+		require.NoError(t, testErr)
+		require.Equal(t, realHome, testHome)
+	}
+}
diff --git a/tools/src/oswrapper/fstestoswrapper_open_test.go b/tools/src/oswrapper/fstestoswrapper_open_test.go
index da13575..61fe7e8 100644
--- a/tools/src/oswrapper/fstestoswrapper_open_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_open_test.go
@@ -27,13 +27,13 @@
 package oswrapper_test
 
 import (
-  "io"
-  "os"
-  "path/filepath"
-  "syscall"
-  "testing"
+	"io"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
 
-  "github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the Open() function in FSTestOSWrapper.
@@ -45,229 +45,229 @@
 // defined expectations.
 
 func TestFSTestOSWrapper_Open(t *testing.T) {
-  root := getTestRoot()
-  tests := []struct {
-    name            string
-    setup           unittestSetup
-    path            string
-    expectedContent *string
-    expectedError
-  }{
-    {
-      name: "Open existing file",
-      path: filepath.Join(root, "file.txt"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join(root, "file.txt"): "hello world",
-        },
-      },
-      expectedContent: stringPtr("hello world"),
-    },
-    {
-      name: "Open non-existent file",
-      path: filepath.Join(root, "nonexistent.txt"),
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Open a directory",
-      path: filepath.Join(root, "mydir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "mydir")},
-      },
-    },
-    {
-      name: "Parent path is a file",
-      path: filepath.Join(root, "file.txt", "another.txt"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join(root, "file.txt"): "i am a file",
-        },
-      },
-      expectedError: expectedError{
-        wantErrMsg: "not a directory",
-      },
-    },
-    {
-      name: "Open symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "symlink content"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      expectedContent: stringPtr("symlink content"),
-    },
-    {
-      name: "Open symlink to directory",
-      path: filepath.Join(root, "link_to_dir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "dir")},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_dir"): "dir",
-        },
-      },
-    },
-    {
-      name: "Open broken symlink",
-      path: filepath.Join(root, "broken_link"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "broken_link"): "nonexistent",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Open symlink loop",
-      path: filepath.Join(root, "loop1"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "loop1"): "loop2",
-          filepath.Join(root, "loop2"): "loop1",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: syscall.ELOOP,
-      },
-    },
-  }
+	root := getTestRoot()
+	tests := []struct {
+		name            string
+		setup           unittestSetup
+		path            string
+		expectedContent *string
+		expectedError
+	}{
+		{
+			name: "Open existing file",
+			path: filepath.Join(root, "file.txt"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join(root, "file.txt"): "hello world",
+				},
+			},
+			expectedContent: stringPtr("hello world"),
+		},
+		{
+			name: "Open non-existent file",
+			path: filepath.Join(root, "nonexistent.txt"),
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Open a directory",
+			path: filepath.Join(root, "mydir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "mydir")},
+			},
+		},
+		{
+			name: "Parent path is a file",
+			path: filepath.Join(root, "file.txt", "another.txt"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join(root, "file.txt"): "i am a file",
+				},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "not a directory",
+			},
+		},
+		{
+			name: "Open symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "symlink content"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			expectedContent: stringPtr("symlink content"),
+		},
+		{
+			name: "Open symlink to directory",
+			path: filepath.Join(root, "link_to_dir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "dir")},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_dir"): "dir",
+				},
+			},
+		},
+		{
+			name: "Open broken symlink",
+			path: filepath.Join(root, "broken_link"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "broken_link"): "nonexistent",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Open symlink loop",
+			path: filepath.Join(root, "loop1"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "loop1"): "loop2",
+					filepath.Join(root, "loop2"): "loop1",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: syscall.ELOOP,
+			},
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      wrapper := tc.setup.setup(t)
-      file, err := wrapper.Open(tc.path)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			wrapper := tc.setup.setup(t)
+			file, err := wrapper.Open(tc.path)
 
-      if tc.expectedError.Check(t, err) {
-        return
-      }
+			if tc.expectedError.Check(t, err) {
+				return
+			}
 
-      require.NotNil(t, file)
-      defer file.Close()
+			require.NotNil(t, file)
+			defer file.Close()
 
-      if tc.expectedContent != nil {
-        content, err := io.ReadAll(file)
-        require.NoError(t, err)
-        require.Equal(t, *tc.expectedContent, string(content))
-      }
-    })
-  }
+			if tc.expectedContent != nil {
+				content, err := io.ReadAll(file)
+				require.NoError(t, err)
+				require.Equal(t, *tc.expectedContent, string(content))
+			}
+		})
+	}
 }
 
 func TestFSTestOSWrapper_Open_MatchesReal(t *testing.T) {
-  tests := []struct {
-    name  string
-    setup matchesRealSetup
-    path  string // path to Open
-  }{
-    {
-      name: "Open existing file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "hello world",
-        },
-      }},
-      path: "file.txt",
-    },
-    {
-      name: "Error on non-existent file",
-      path: "nonexistent.txt",
-    },
-    {
-      name: "Open a directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{
-          "mydir",
-        },
-      }},
-      path: "mydir",
-    },
-    {
-      name: "Error on parent path is a file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "i am a file",
-        },
-      }},
-      path: filepath.Join("file.txt", "another.txt"),
-    },
-    {
-      name: "Open symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "symlink content"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-    },
-    {
-      name: "Open symlink to directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"dir"},
-        initialSymlinks: map[string]string{
-          "link_to_dir": "dir",
-        },
-      }},
-      path: "link_to_dir",
-    },
-    {
-      name: "Open broken symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "broken_link": "nonexistent",
-        },
-      }},
-      path: "broken_link",
-    },
-    {
-      name: "Open symlink loop",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "loop1": "loop2",
-          "loop2": "loop1",
-        },
-      }},
-      path: "loop1",
-    },
-  }
+	tests := []struct {
+		name  string
+		setup matchesRealSetup
+		path  string // path to Open
+	}{
+		{
+			name: "Open existing file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "hello world",
+				},
+			}},
+			path: "file.txt",
+		},
+		{
+			name: "Error on non-existent file",
+			path: "nonexistent.txt",
+		},
+		{
+			name: "Open a directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{
+					"mydir",
+				},
+			}},
+			path: "mydir",
+		},
+		{
+			name: "Error on parent path is a file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "i am a file",
+				},
+			}},
+			path: filepath.Join("file.txt", "another.txt"),
+		},
+		{
+			name: "Open symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "symlink content"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+		},
+		{
+			name: "Open symlink to directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"dir"},
+				initialSymlinks: map[string]string{
+					"link_to_dir": "dir",
+				},
+			}},
+			path: "link_to_dir",
+		},
+		{
+			name: "Open broken symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"broken_link": "nonexistent",
+				},
+			}},
+			path: "broken_link",
+		},
+		{
+			name: "Open symlink loop",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"loop1": "loop2",
+					"loop2": "loop1",
+				},
+			}},
+			path: "loop1",
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      realRoot, realFS, testFS := tc.setup.setup(t)
-      defer os.RemoveAll(realRoot)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			realRoot, realFS, testFS := tc.setup.setup(t)
+			defer os.RemoveAll(realRoot)
 
-      realFile, realErr := realFS.Open(filepath.Join(realRoot, tc.path))
-      if realErr == nil {
-        defer realFile.Close()
-      }
-      testFile, testErr := testFS.Open(tc.path)
-      if testErr == nil {
-        defer testFile.Close()
-      }
+			realFile, realErr := realFS.Open(filepath.Join(realRoot, tc.path))
+			if realErr == nil {
+				defer realFile.Close()
+			}
+			testFile, testErr := testFS.Open(tc.path)
+			if testErr == nil {
+				defer testFile.Close()
+			}
 
-      requireErrorsMatch(t, realErr, testErr)
+			requireErrorsMatch(t, realErr, testErr)
 
-      if realErr == nil {
-        realInfo, err := realFile.Stat()
-        require.NoError(t, err)
-        testInfo, err := testFile.Stat()
-        require.NoError(t, err)
+			if realErr == nil {
+				realInfo, err := realFile.Stat()
+				require.NoError(t, err)
+				testInfo, err := testFile.Stat()
+				require.NoError(t, err)
 
-        require.Equal(t, realInfo.IsDir(), testInfo.IsDir(), "IsDir mismatch for opened path")
+				require.Equal(t, realInfo.IsDir(), testInfo.IsDir(), "IsDir mismatch for opened path")
 
-        if !realInfo.IsDir() {
-          realContent, err := io.ReadAll(realFile)
-          require.NoError(t, err)
-          testContent, err := io.ReadAll(testFile)
-          require.NoError(t, err)
-          require.Equal(t, realContent, testContent)
-        }
-      }
-    })
-  }
+				if !realInfo.IsDir() {
+					realContent, err := io.ReadAll(realFile)
+					require.NoError(t, err)
+					testContent, err := io.ReadAll(testFile)
+					require.NoError(t, err)
+					require.Equal(t, realContent, testContent)
+				}
+			}
+		})
+	}
 }
diff --git a/tools/src/oswrapper/fstestoswrapper_openfile_test.go b/tools/src/oswrapper/fstestoswrapper_openfile_test.go
index d9d6da9..495a73b 100644
--- a/tools/src/oswrapper/fstestoswrapper_openfile_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_openfile_test.go
@@ -27,14 +27,14 @@
 package oswrapper_test
 
 import (
-  "io"
-  "os"
-  "path/filepath"
-  "syscall"
-  "testing"
+	"io"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
 
-  "dawn.googlesource.com/dawn/tools/src/oswrapper"
-  "github.com/stretchr/testify/require"
+	"dawn.googlesource.com/dawn/tools/src/oswrapper"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the OpenFile() function in FSTestOSWrapper.
@@ -46,532 +46,532 @@
 // defined expectations.
 
 func TestFSTestOSWrapper_OpenFile(t *testing.T) {
-  root := getTestRoot()
-  tests := []struct {
-    name            string
-    setup           unittestSetup
-    path            string
-    flag            int
-    action          func(t *testing.T, file oswrapper.File) // Action to perform on the opened file
-    expectedContent *string                                 // Expected content of the file *after* the action
-    expectedError
-  }{
-    {
-      name: "O_RDONLY - Read existing file",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_RDONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "read me"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        content, err := io.ReadAll(file)
-        require.NoError(t, err)
-        require.Equal(t, "read me", string(content))
-      },
-    },
-    {
-      name: "O_RDONLY - Error on write",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_RDONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "read only"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("fail"))
-        require.Error(t, err)
-      },
-      expectedContent: stringPtr("read only"),
-    },
-    {
-      name: "O_WRONLY - Write to existing file",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_WRONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "initial"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("newtial"),
-    },
-    {
-      name: "O_WRONLY - Error on read",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_WRONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "write only"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := io.ReadAll(file)
-        require.Error(t, err)
-      },
-      expectedContent: stringPtr("write only"),
-    },
-    {
-      name: "O_RDWR - Read and Write",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_RDWR,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "start"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        // This should not advance the write offset
-        content, err := io.ReadAll(file)
-        require.NoError(t, err)
-        require.Equal(t, "start", string(content))
+	root := getTestRoot()
+	tests := []struct {
+		name            string
+		setup           unittestSetup
+		path            string
+		flag            int
+		action          func(t *testing.T, file oswrapper.File) // Action to perform on the opened file
+		expectedContent *string                                 // Expected content of the file *after* the action
+		expectedError
+	}{
+		{
+			name: "O_RDONLY - Read existing file",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_RDONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "read me"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				content, err := io.ReadAll(file)
+				require.NoError(t, err)
+				require.Equal(t, "read me", string(content))
+			},
+		},
+		{
+			name: "O_RDONLY - Error on write",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_RDONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "read only"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("fail"))
+				require.Error(t, err)
+			},
+			expectedContent: stringPtr("read only"),
+		},
+		{
+			name: "O_WRONLY - Write to existing file",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_WRONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "initial"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("newtial"),
+		},
+		{
+			name: "O_WRONLY - Error on read",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_WRONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "write only"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := io.ReadAll(file)
+				require.Error(t, err)
+			},
+			expectedContent: stringPtr("write only"),
+		},
+		{
+			name: "O_RDWR - Read and Write",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_RDWR,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "start"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				// This should not advance the write offset
+				content, err := io.ReadAll(file)
+				require.NoError(t, err)
+				require.Equal(t, "start", string(content))
 
-        // Seek to the beginning to overwrite
-        _, err = file.Seek(0, io.SeekStart)
-        require.NoError(t, err)
+				// Seek to the beginning to overwrite
+				_, err = file.Seek(0, io.SeekStart)
+				require.NoError(t, err)
 
-        _, err = file.Write([]byte("finish"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("finish"),
-    },
-    {
-      name: "O_APPEND - Append to file",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_WRONLY | os.O_APPEND,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "first,"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("second"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("first,second"),
-    },
-    {
-      name: "O_CREATE - Create new file",
-      path: filepath.Join(root, "newfile.txt"),
-      flag: os.O_WRONLY | os.O_CREATE,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("created"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("created"),
-    },
-    {
-      name: "O_CREATE | O_EXCL - Fail if exists",
-      path: filepath.Join(root, "existing.txt"),
-      flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "existing.txt"): "..."},
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrExist,
-      },
-    },
-    {
-      name: "O_TRUNC - Truncate existing file",
-      path: filepath.Join(root, "file.txt"),
-      flag: os.O_WRONLY | os.O_TRUNC,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "to be truncated"},
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new data"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("new data"),
-    },
-    {
-      name: "Error - Open non-existent for reading",
-      path: filepath.Join(root, "no.txt"),
-      flag: os.O_RDONLY,
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Error - Path is a directory",
-      path: filepath.Join(root, "mydir"),
-      flag: os.O_WRONLY,
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "mydir")},
-      },
-      expectedError: expectedError{
-        wantErrMsg: "is a directory",
-      },
-    },
-    {
-      name: "Error - Open symlink to directory for writing",
-      path: filepath.Join(root, "link_to_dir"),
-      flag: os.O_WRONLY,
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "dir")},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_dir"): "dir",
-        },
-      },
-      expectedError: expectedError{
-        wantErrMsg: "is a directory",
-      },
-    },
-    {
-      name: "Open symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      flag: os.O_RDONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      expectedContent: stringPtr("content"),
-    },
-    {
-      name: "Write to symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      flag: os.O_WRONLY,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "old"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new"))
-        require.NoError(t, err)
-      },
-      expectedContent: stringPtr("new"),
-    },
-    {
-      name: "Open broken symlink",
-      path: filepath.Join(root, "broken_link"),
-      flag: os.O_RDONLY,
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "broken_link"): "nonexistent",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Create file via symlink",
-      path: filepath.Join(root, "link_to_new"),
-      flag: os.O_WRONLY | os.O_CREATE,
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_new"): "new.txt",
-        },
-      },
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("created"))
-        require.NoError(t, err)
-      },
-      // We check the symlink path content (which should read the target)
-      expectedContent: stringPtr("created"),
-    },
-    {
-      name: "O_EXCL fail on existing symlink",
-      path: filepath.Join(root, "link"),
-      flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link"): "file.txt",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrExist,
-      },
-    },
-    {
-      name: "Open symlink loop",
-      path: filepath.Join(root, "loop1"),
-      flag: os.O_RDONLY,
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "loop1"): "loop2",
-          filepath.Join(root, "loop2"): "loop1",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: syscall.ELOOP,
-      },
-    },
-  }
+				_, err = file.Write([]byte("finish"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("finish"),
+		},
+		{
+			name: "O_APPEND - Append to file",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_WRONLY | os.O_APPEND,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "first,"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("second"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("first,second"),
+		},
+		{
+			name: "O_CREATE - Create new file",
+			path: filepath.Join(root, "newfile.txt"),
+			flag: os.O_WRONLY | os.O_CREATE,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("created"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("created"),
+		},
+		{
+			name: "O_CREATE | O_EXCL - Fail if exists",
+			path: filepath.Join(root, "existing.txt"),
+			flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "existing.txt"): "..."},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrExist,
+			},
+		},
+		{
+			name: "O_TRUNC - Truncate existing file",
+			path: filepath.Join(root, "file.txt"),
+			flag: os.O_WRONLY | os.O_TRUNC,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "to be truncated"},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new data"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("new data"),
+		},
+		{
+			name: "Error - Open non-existent for reading",
+			path: filepath.Join(root, "no.txt"),
+			flag: os.O_RDONLY,
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Error - Path is a directory",
+			path: filepath.Join(root, "mydir"),
+			flag: os.O_WRONLY,
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "mydir")},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "is a directory",
+			},
+		},
+		{
+			name: "Error - Open symlink to directory for writing",
+			path: filepath.Join(root, "link_to_dir"),
+			flag: os.O_WRONLY,
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "dir")},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_dir"): "dir",
+				},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "is a directory",
+			},
+		},
+		{
+			name: "Open symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			flag: os.O_RDONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			expectedContent: stringPtr("content"),
+		},
+		{
+			name: "Write to symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			flag: os.O_WRONLY,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "old"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new"))
+				require.NoError(t, err)
+			},
+			expectedContent: stringPtr("new"),
+		},
+		{
+			name: "Open broken symlink",
+			path: filepath.Join(root, "broken_link"),
+			flag: os.O_RDONLY,
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "broken_link"): "nonexistent",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Create file via symlink",
+			path: filepath.Join(root, "link_to_new"),
+			flag: os.O_WRONLY | os.O_CREATE,
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_new"): "new.txt",
+				},
+			},
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("created"))
+				require.NoError(t, err)
+			},
+			// We check the symlink path content (which should read the target)
+			expectedContent: stringPtr("created"),
+		},
+		{
+			name: "O_EXCL fail on existing symlink",
+			path: filepath.Join(root, "link"),
+			flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link"): "file.txt",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrExist,
+			},
+		},
+		{
+			name: "Open symlink loop",
+			path: filepath.Join(root, "loop1"),
+			flag: os.O_RDONLY,
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "loop1"): "loop2",
+					filepath.Join(root, "loop2"): "loop1",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: syscall.ELOOP,
+			},
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      wrapper := tc.setup.setup(t)
-      file, err := wrapper.OpenFile(tc.path, tc.flag, 0666)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			wrapper := tc.setup.setup(t)
+			file, err := wrapper.OpenFile(tc.path, tc.flag, 0666)
 
-      if tc.expectedError.Check(t, err) {
-        return
-      }
+			if tc.expectedError.Check(t, err) {
+				return
+			}
 
-      require.NotNil(t, file)
-      defer file.Close()
-      if tc.action != nil {
-        tc.action(t, file)
-      }
+			require.NotNil(t, file)
+			defer file.Close()
+			if tc.action != nil {
+				tc.action(t, file)
+			}
 
-      // Close the file to ensure contents are flushed.
-      require.NoError(t, file.Close())
+			// Close the file to ensure contents are flushed.
+			require.NoError(t, file.Close())
 
-      if tc.expectedContent != nil {
-        content, err := wrapper.ReadFile(tc.path)
-        require.NoError(t, err)
-        require.Equal(t, *tc.expectedContent, string(content))
-      }
-    })
-  }
+			if tc.expectedContent != nil {
+				content, err := wrapper.ReadFile(tc.path)
+				require.NoError(t, err)
+				require.Equal(t, *tc.expectedContent, string(content))
+			}
+		})
+	}
 }
 
 func TestFSTestOSWrapper_OpenFile_MatchesReal(t *testing.T) {
-  tests := []struct {
-    name   string
-    setup  matchesRealSetup
-    path   string
-    flag   int
-    action func(t *testing.T, file oswrapper.File)
-  }{
-    {
-      name: "O_RDONLY - Read existing file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "read me",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_RDONLY,
-    },
-    {
-      name: "O_RDONLY - Error on write",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "read only",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_RDONLY,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("fail"))
-        require.Error(t, err)
-      },
-    },
-    {
-      name: "O_WRONLY - Write to existing file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "initial",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_WRONLY,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "O_WRONLY - Error on read",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "write only",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_WRONLY,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := io.ReadAll(file)
-        require.Error(t, err)
-      },
-    },
-    {
-      name: "O_RDWR - Read and Write",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "start",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_RDWR,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("finish"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "O_APPEND - Append to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "first,",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_WRONLY | os.O_APPEND,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("second"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "O_CREATE - Create new file",
-      path: "newfile.txt",
-      flag: os.O_WRONLY | os.O_CREATE,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("created"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "O_CREATE | O_EXCL - Fail if exists",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "existing.txt": "...",
-        },
-      }},
-      path: "existing.txt",
-      flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
-    },
-    {
-      name: "O_TRUNC - Truncate existing file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "to be truncated",
-        },
-      }},
-      path: "file.txt",
-      flag: os.O_WRONLY | os.O_TRUNC,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new data"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "Error - Open non-existent for reading",
-      path: "no.txt",
-      flag: os.O_RDONLY,
-    },
-    {
-      name: "Error - Path is a directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"mydir"},
-      }},
-      path: "mydir",
-      flag: os.O_WRONLY,
-    },
-    {
-      name: "Error - Open symlink to directory for writing",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"dir"},
-        initialSymlinks: map[string]string{
-          "link_to_dir": "dir",
-        },
-      }},
-      path: "link_to_dir",
-      flag: os.O_WRONLY,
-    },
-    {
-      name: "Open symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "content"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-      flag: os.O_RDONLY,
-    },
-    {
-      name: "Write to symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "old"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-      flag: os.O_WRONLY,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("new"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "Open broken symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "broken_link": "nonexistent",
-        },
-      }},
-      path: "broken_link",
-      flag: os.O_RDONLY,
-    },
-    {
-      name: "Create file via symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "link_to_new": "new.txt",
-        },
-      }},
-      path: "link_to_new",
-      flag: os.O_WRONLY | os.O_CREATE,
-      action: func(t *testing.T, file oswrapper.File) {
-        _, err := file.Write([]byte("created"))
-        require.NoError(t, err)
-      },
-    },
-    {
-      name: "O_EXCL fail on existing symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": ""},
-        initialSymlinks: map[string]string{
-          "link": "file.txt",
-        },
-      }},
-      path: "link",
-      flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
-    },
-    {
-      name: "Open symlink loop",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "loop1": "loop2",
-          "loop2": "loop1",
-        },
-      }},
-      path: "loop1",
-      flag: os.O_RDONLY,
-    },
-  }
+	tests := []struct {
+		name   string
+		setup  matchesRealSetup
+		path   string
+		flag   int
+		action func(t *testing.T, file oswrapper.File)
+	}{
+		{
+			name: "O_RDONLY - Read existing file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "read me",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_RDONLY,
+		},
+		{
+			name: "O_RDONLY - Error on write",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "read only",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_RDONLY,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("fail"))
+				require.Error(t, err)
+			},
+		},
+		{
+			name: "O_WRONLY - Write to existing file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "initial",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_WRONLY,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "O_WRONLY - Error on read",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "write only",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_WRONLY,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := io.ReadAll(file)
+				require.Error(t, err)
+			},
+		},
+		{
+			name: "O_RDWR - Read and Write",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "start",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_RDWR,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("finish"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "O_APPEND - Append to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "first,",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_WRONLY | os.O_APPEND,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("second"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "O_CREATE - Create new file",
+			path: "newfile.txt",
+			flag: os.O_WRONLY | os.O_CREATE,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("created"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "O_CREATE | O_EXCL - Fail if exists",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"existing.txt": "...",
+				},
+			}},
+			path: "existing.txt",
+			flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
+		},
+		{
+			name: "O_TRUNC - Truncate existing file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "to be truncated",
+				},
+			}},
+			path: "file.txt",
+			flag: os.O_WRONLY | os.O_TRUNC,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new data"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "Error - Open non-existent for reading",
+			path: "no.txt",
+			flag: os.O_RDONLY,
+		},
+		{
+			name: "Error - Path is a directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"mydir"},
+			}},
+			path: "mydir",
+			flag: os.O_WRONLY,
+		},
+		{
+			name: "Error - Open symlink to directory for writing",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"dir"},
+				initialSymlinks: map[string]string{
+					"link_to_dir": "dir",
+				},
+			}},
+			path: "link_to_dir",
+			flag: os.O_WRONLY,
+		},
+		{
+			name: "Open symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "content"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+			flag: os.O_RDONLY,
+		},
+		{
+			name: "Write to symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "old"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+			flag: os.O_WRONLY,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("new"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "Open broken symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"broken_link": "nonexistent",
+				},
+			}},
+			path: "broken_link",
+			flag: os.O_RDONLY,
+		},
+		{
+			name: "Create file via symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"link_to_new": "new.txt",
+				},
+			}},
+			path: "link_to_new",
+			flag: os.O_WRONLY | os.O_CREATE,
+			action: func(t *testing.T, file oswrapper.File) {
+				_, err := file.Write([]byte("created"))
+				require.NoError(t, err)
+			},
+		},
+		{
+			name: "O_EXCL fail on existing symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": ""},
+				initialSymlinks: map[string]string{
+					"link": "file.txt",
+				},
+			}},
+			path: "link",
+			flag: os.O_WRONLY | os.O_CREATE | os.O_EXCL,
+		},
+		{
+			name: "Open symlink loop",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"loop1": "loop2",
+					"loop2": "loop1",
+				},
+			}},
+			path: "loop1",
+			flag: os.O_RDONLY,
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      realRoot, realFS, testFS := tc.setup.setup(t)
-      defer os.RemoveAll(realRoot)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			realRoot, realFS, testFS := tc.setup.setup(t)
+			defer os.RemoveAll(realRoot)
 
-      // Execute on Real FS
-      realFile, realErr := realFS.OpenFile(filepath.Join(realRoot, tc.path), tc.flag, 0666)
-      if realErr == nil {
-        defer realFile.Close()
-        if tc.action != nil {
-          tc.action(t, realFile)
-        }
-        require.NoError(t, realFile.Close())
-      }
+			// Execute on Real FS
+			realFile, realErr := realFS.OpenFile(filepath.Join(realRoot, tc.path), tc.flag, 0666)
+			if realErr == nil {
+				defer realFile.Close()
+				if tc.action != nil {
+					tc.action(t, realFile)
+				}
+				require.NoError(t, realFile.Close())
+			}
 
-      // Execute on Test FS
-      testFile, testErr := testFS.OpenFile(tc.path, tc.flag, 0666)
-      if testErr == nil {
-        defer testFile.Close()
-        if tc.action != nil {
-          tc.action(t, testFile)
-        }
-        require.NoError(t, testFile.Close())
-      }
+			// Execute on Test FS
+			testFile, testErr := testFS.OpenFile(tc.path, tc.flag, 0666)
+			if testErr == nil {
+				defer testFile.Close()
+				if tc.action != nil {
+					tc.action(t, testFile)
+				}
+				require.NoError(t, testFile.Close())
+			}
 
-      requireErrorsMatch(t, realErr, testErr)
-      if realErr == nil {
-        requireFileSystemsMatch(t, realRoot, testFS)
-      }
-    })
-  }
+			requireErrorsMatch(t, realErr, testErr)
+			if realErr == nil {
+				requireFileSystemsMatch(t, realRoot, testFS)
+			}
+		})
+	}
 }
diff --git a/tools/src/oswrapper/fstestoswrapper_readdir_test.go b/tools/src/oswrapper/fstestoswrapper_readdir_test.go
index 3392a82..600349e 100644
--- a/tools/src/oswrapper/fstestoswrapper_readdir_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_readdir_test.go
@@ -27,12 +27,12 @@
 package oswrapper_test
 
 import (
-  "os"
-  "path/filepath"
-  "syscall"
-  "testing"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
 
-  "github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the ReadDir() function in FSTestOSWrapper.
@@ -44,226 +44,226 @@
 // defined expectations.
 
 func TestFSTestOSWrapper_ReadDir(t *testing.T) {
-  root := getTestRoot()
-  tests := []struct {
-    name            string
-    setup           unittestSetup
-    path            string
-    expectedEntries []string
-    expectedError
-  }{
-    {
-      name: "Read empty directory",
-      path: filepath.Join(root, "emptydir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "emptydir")},
-      },
-      expectedEntries: []string{},
-    },
-    {
-      name: "Read directory with files and subdirectories",
-      path: filepath.Join(root, "dir"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join(root, "dir", "file1.txt"):  "",
-          filepath.Join(root, "dir", "z_file.txt"): "",
-        },
-        initialDirs: []string{filepath.Join(root, "dir", "subdir", "nested")},
-      },
-      expectedEntries: []string{"file1.txt", "subdir", "z_file.txt"},
-    },
-    {
-      name: "Read non-existent directory",
-      path: filepath.Join(root, "nonexistent"),
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Read a file",
-      path: filepath.Join(root, "file.txt"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
-      },
-      expectedError: expectedError{
-        wantErrMsg: "not a directory",
-      },
-    },
-    {
-      name: "Read symlink to directory",
-      path: filepath.Join(root, "link_to_dir"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join(root, "dir", "file1.txt"): "",
-        },
-        initialDirs: []string{filepath.Join(root, "dir")},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_dir"): "dir",
-        },
-      },
-      expectedEntries: []string{"file1.txt"},
-    },
-    {
-      name: "Read symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      expectedError: expectedError{
-        wantErrMsg: "not a directory",
-      },
-    },
-    {
-      name: "Read broken symlink",
-      path: filepath.Join(root, "broken_link"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "broken_link"): "nonexistent",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "ReadDir symlink loop",
-      path: filepath.Join(root, "loop1"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "loop1"): "loop2",
-          filepath.Join(root, "loop2"): "loop1",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: syscall.ELOOP,
-      },
-    },
-  }
+	root := getTestRoot()
+	tests := []struct {
+		name            string
+		setup           unittestSetup
+		path            string
+		expectedEntries []string
+		expectedError
+	}{
+		{
+			name: "Read empty directory",
+			path: filepath.Join(root, "emptydir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "emptydir")},
+			},
+			expectedEntries: []string{},
+		},
+		{
+			name: "Read directory with files and subdirectories",
+			path: filepath.Join(root, "dir"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join(root, "dir", "file1.txt"):  "",
+					filepath.Join(root, "dir", "z_file.txt"): "",
+				},
+				initialDirs: []string{filepath.Join(root, "dir", "subdir", "nested")},
+			},
+			expectedEntries: []string{"file1.txt", "subdir", "z_file.txt"},
+		},
+		{
+			name: "Read non-existent directory",
+			path: filepath.Join(root, "nonexistent"),
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Read a file",
+			path: filepath.Join(root, "file.txt"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "not a directory",
+			},
+		},
+		{
+			name: "Read symlink to directory",
+			path: filepath.Join(root, "link_to_dir"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join(root, "dir", "file1.txt"): "",
+				},
+				initialDirs: []string{filepath.Join(root, "dir")},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_dir"): "dir",
+				},
+			},
+			expectedEntries: []string{"file1.txt"},
+		},
+		{
+			name: "Read symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): ""},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "not a directory",
+			},
+		},
+		{
+			name: "Read broken symlink",
+			path: filepath.Join(root, "broken_link"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "broken_link"): "nonexistent",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "ReadDir symlink loop",
+			path: filepath.Join(root, "loop1"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "loop1"): "loop2",
+					filepath.Join(root, "loop2"): "loop1",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: syscall.ELOOP,
+			},
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      wrapper := tc.setup.setup(t)
-      entries, err := wrapper.ReadDir(tc.path)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			wrapper := tc.setup.setup(t)
+			entries, err := wrapper.ReadDir(tc.path)
 
-      if tc.expectedError.Check(t, err) {
-        return
-      }
+			if tc.expectedError.Check(t, err) {
+				return
+			}
 
-      entryNames := make([]string, len(entries))
-      for i, e := range entries {
-        entryNames[i] = e.Name()
-      }
-      require.ElementsMatch(t, tc.expectedEntries, entryNames)
-    })
-  }
+			entryNames := make([]string, len(entries))
+			for i, e := range entries {
+				entryNames[i] = e.Name()
+			}
+			require.ElementsMatch(t, tc.expectedEntries, entryNames)
+		})
+	}
 }
 
 func TestFSTestOSWrapper_ReadDir_MatchesReal(t *testing.T) {
-  tests := []struct {
-    name  string
-    setup matchesRealSetup
-    path  string
-  }{
-    {
-      name: "Read empty directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"emptydir"},
-      }},
-      path: "emptydir",
-    },
-    {
-      name: "Read directory with files and subdirectories",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join("dir", "file1.txt"):  "content",
-          filepath.Join("dir", "z_file.txt"): "content",
-        },
-        initialDirs: []string{
-          "dir",
-          filepath.Join("dir", "subdir", "nested"),
-        },
-      }},
-      path: "dir",
-    },
-    {
-      name: "Error on non-existent directory",
-      path: "nonexistent",
-    },
-    {
-      name: "Error on path is a file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "content"},
-      }},
-      path: "file.txt",
-    },
-    {
-      name: "Read symlink to directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          filepath.Join("dir", "file1.txt"): "content",
-        },
-        initialDirs: []string{"dir"},
-        initialSymlinks: map[string]string{
-          "link_to_dir": "dir",
-        },
-      }},
-      path: "link_to_dir",
-    },
-    {
-      name: "Read symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "content"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-    },
-    {
-      name: "Read broken symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "broken_link": "nonexistent",
-        },
-      }},
-      path: "broken_link",
-    },
-    {
-      name: "ReadDir symlink loop",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "loop1": "loop2",
-          "loop2": "loop1",
-        },
-      }},
-      path: "loop1",
-    },
-  }
+	tests := []struct {
+		name  string
+		setup matchesRealSetup
+		path  string
+	}{
+		{
+			name: "Read empty directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"emptydir"},
+			}},
+			path: "emptydir",
+		},
+		{
+			name: "Read directory with files and subdirectories",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join("dir", "file1.txt"):  "content",
+					filepath.Join("dir", "z_file.txt"): "content",
+				},
+				initialDirs: []string{
+					"dir",
+					filepath.Join("dir", "subdir", "nested"),
+				},
+			}},
+			path: "dir",
+		},
+		{
+			name: "Error on non-existent directory",
+			path: "nonexistent",
+		},
+		{
+			name: "Error on path is a file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "content"},
+			}},
+			path: "file.txt",
+		},
+		{
+			name: "Read symlink to directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					filepath.Join("dir", "file1.txt"): "content",
+				},
+				initialDirs: []string{"dir"},
+				initialSymlinks: map[string]string{
+					"link_to_dir": "dir",
+				},
+			}},
+			path: "link_to_dir",
+		},
+		{
+			name: "Read symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "content"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+		},
+		{
+			name: "Read broken symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"broken_link": "nonexistent",
+				},
+			}},
+			path: "broken_link",
+		},
+		{
+			name: "ReadDir symlink loop",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"loop1": "loop2",
+					"loop2": "loop1",
+				},
+			}},
+			path: "loop1",
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      realRoot, realFS, testFS := tc.setup.setup(t)
-      defer os.RemoveAll(realRoot)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			realRoot, realFS, testFS := tc.setup.setup(t)
+			defer os.RemoveAll(realRoot)
 
-      // Execute
-      realEntries, realErr := realFS.ReadDir(filepath.Join(realRoot, tc.path))
-      testEntries, testErr := testFS.ReadDir(tc.path)
+			// Execute
+			realEntries, realErr := realFS.ReadDir(filepath.Join(realRoot, tc.path))
+			testEntries, testErr := testFS.ReadDir(tc.path)
 
-      requireErrorsMatch(t, realErr, testErr)
-      if realErr == nil {
-        realNames := make([]string, len(realEntries))
-        for i, e := range realEntries {
-          realNames[i] = e.Name()
-        }
-        testNames := make([]string, len(testEntries))
-        for i, e := range testEntries {
-          testNames[i] = e.Name()
-        }
-        require.ElementsMatch(t, realNames, testNames)
-      }
-    })
-  }
+			requireErrorsMatch(t, realErr, testErr)
+			if realErr == nil {
+				realNames := make([]string, len(realEntries))
+				for i, e := range realEntries {
+					realNames[i] = e.Name()
+				}
+				testNames := make([]string, len(testEntries))
+				for i, e := range testEntries {
+					testNames[i] = e.Name()
+				}
+				require.ElementsMatch(t, realNames, testNames)
+			}
+		})
+	}
 }
diff --git a/tools/src/oswrapper/fstestoswrapper_readfile_test.go b/tools/src/oswrapper/fstestoswrapper_readfile_test.go
index fe973ca..c61ccef 100644
--- a/tools/src/oswrapper/fstestoswrapper_readfile_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_readfile_test.go
@@ -27,12 +27,12 @@
 package oswrapper_test
 
 import (
-  "os"
-  "path/filepath"
-  "syscall"
-  "testing"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
 
-  "github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the ReadFile() function of FSTestOSWrapper.
@@ -44,186 +44,186 @@
 // defined expectations.
 
 func TestFSTestOSWrapper_ReadFile(t *testing.T) {
-  root := getTestRoot()
-  tests := []struct {
-    name            string
-    setup           unittestSetup
-    path            string
-    expectedContent []byte
-    expectedError
-  }{
-    {
-      name: "Read existing file",
-      path: filepath.Join(root, "file.txt"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "hello world"},
-      },
-      expectedContent: []byte("hello world"),
-    },
-    {
-      name: "Read non-existent file",
-      path: filepath.Join(root, "nonexistent.txt"),
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Read a directory",
-      path: filepath.Join(root, "mydir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "mydir")},
-      },
-      expectedError: expectedError{
-        wantErrMsg: "is a directory",
-      },
-    },
-    {
-      name: "Read symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      expectedContent: []byte("content"),
-    },
-    {
-      name: "Read symlink to dir",
-      path: filepath.Join(root, "link_to_dir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "dir")},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_dir"): "dir",
-        },
-      },
-      expectedError: expectedError{
-        wantErrMsg: "is a directory",
-      },
-    },
-    {
-      name: "Read broken symlink",
-      path: filepath.Join(root, "broken_link"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "broken_link"): "nonexistent",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Read symlink loop",
-      path: filepath.Join(root, "loop1"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "loop1"): "loop2",
-          filepath.Join(root, "loop2"): "loop1",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: syscall.ELOOP,
-      },
-    },
-  }
+	root := getTestRoot()
+	tests := []struct {
+		name            string
+		setup           unittestSetup
+		path            string
+		expectedContent []byte
+		expectedError
+	}{
+		{
+			name: "Read existing file",
+			path: filepath.Join(root, "file.txt"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "hello world"},
+			},
+			expectedContent: []byte("hello world"),
+		},
+		{
+			name: "Read non-existent file",
+			path: filepath.Join(root, "nonexistent.txt"),
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Read a directory",
+			path: filepath.Join(root, "mydir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "mydir")},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "is a directory",
+			},
+		},
+		{
+			name: "Read symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			expectedContent: []byte("content"),
+		},
+		{
+			name: "Read symlink to dir",
+			path: filepath.Join(root, "link_to_dir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "dir")},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_dir"): "dir",
+				},
+			},
+			expectedError: expectedError{
+				wantErrMsg: "is a directory",
+			},
+		},
+		{
+			name: "Read broken symlink",
+			path: filepath.Join(root, "broken_link"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "broken_link"): "nonexistent",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Read symlink loop",
+			path: filepath.Join(root, "loop1"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "loop1"): "loop2",
+					filepath.Join(root, "loop2"): "loop1",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: syscall.ELOOP,
+			},
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      wrapper := tc.setup.setup(t)
-      content, err := wrapper.ReadFile(tc.path)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			wrapper := tc.setup.setup(t)
+			content, err := wrapper.ReadFile(tc.path)
 
-      if tc.expectedError.Check(t, err) {
-        return
-      }
+			if tc.expectedError.Check(t, err) {
+				return
+			}
 
-      require.Equal(t, tc.expectedContent, content)
-    })
-  }
+			require.Equal(t, tc.expectedContent, content)
+		})
+	}
 }
 
 func TestFSTestOSWrapper_ReadFile_MatchesReal(t *testing.T) {
-  tests := []struct {
-    name  string
-    setup matchesRealSetup
-    path  string
-  }{
-    {
-      name: "Read existing file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "hello world",
-        },
-      }},
-      path: "file.txt",
-    },
-    {
-      name: "Error on non-existent file",
-      path: "nonexistent.txt",
-    },
-    {
-      name: "Error on path is a directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{
-          "mydir",
-        },
-      }},
-      path: "mydir",
-    },
-    {
-      name: "Read symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "content"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-    },
-    {
-      name: "Read symlink to dir",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"dir"},
-        initialSymlinks: map[string]string{
-          "link_to_dir": "dir",
-        },
-      }},
-      path: "link_to_dir",
-    },
-    {
-      name: "Read broken symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "broken_link": "nonexistent",
-        },
-      }},
-      path: "broken_link",
-    },
-    {
-      name: "Read symlink loop",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "loop1": "loop2",
-          "loop2": "loop1",
-        },
-      }},
-      path: "loop1",
-    },
-  }
+	tests := []struct {
+		name  string
+		setup matchesRealSetup
+		path  string
+	}{
+		{
+			name: "Read existing file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "hello world",
+				},
+			}},
+			path: "file.txt",
+		},
+		{
+			name: "Error on non-existent file",
+			path: "nonexistent.txt",
+		},
+		{
+			name: "Error on path is a directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{
+					"mydir",
+				},
+			}},
+			path: "mydir",
+		},
+		{
+			name: "Read symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "content"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+		},
+		{
+			name: "Read symlink to dir",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"dir"},
+				initialSymlinks: map[string]string{
+					"link_to_dir": "dir",
+				},
+			}},
+			path: "link_to_dir",
+		},
+		{
+			name: "Read broken symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"broken_link": "nonexistent",
+				},
+			}},
+			path: "broken_link",
+		},
+		{
+			name: "Read symlink loop",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"loop1": "loop2",
+					"loop2": "loop1",
+				},
+			}},
+			path: "loop1",
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      realRoot, realFS, testFS := tc.setup.setup(t)
-      defer os.RemoveAll(realRoot)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			realRoot, realFS, testFS := tc.setup.setup(t)
+			defer os.RemoveAll(realRoot)
 
-      // Execute
-      realContent, realErr := realFS.ReadFile(filepath.Join(realRoot, tc.path))
-      testContent, testErr := testFS.ReadFile(tc.path)
+			// Execute
+			realContent, realErr := realFS.ReadFile(filepath.Join(realRoot, tc.path))
+			testContent, testErr := testFS.ReadFile(tc.path)
 
-      requireErrorsMatch(t, realErr, testErr)
-      if realErr == nil {
-        require.Equal(t, realContent, testContent)
-      }
-    })
-  }
+			requireErrorsMatch(t, realErr, testErr)
+			if realErr == nil {
+				require.Equal(t, realContent, testContent)
+			}
+		})
+	}
 }
diff --git a/tools/src/oswrapper/fstestoswrapper_stat_test.go b/tools/src/oswrapper/fstestoswrapper_stat_test.go
index 61972bf..df1b441 100644
--- a/tools/src/oswrapper/fstestoswrapper_stat_test.go
+++ b/tools/src/oswrapper/fstestoswrapper_stat_test.go
@@ -27,12 +27,12 @@
 package oswrapper_test
 
 import (
-  "os"
-  "path/filepath"
-  "syscall"
-  "testing"
+	"os"
+	"path/filepath"
+	"syscall"
+	"testing"
 
-  "github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/require"
 )
 
 // Tests for the Stat() function in FSTestOSWrapper.
@@ -44,232 +44,232 @@
 // defined expectations.
 
 func TestFSTestOSWrapper_Stat(t *testing.T) {
-  root := getTestRoot()
-  tests := []struct {
-    name   string
-    setup  unittestSetup
-    path   string
-    verify func(t *testing.T, info os.FileInfo)
-    expectedError
-  }{
-    {
-      name: "Stat a file",
-      path: filepath.Join(root, "file.txt"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
-      },
-      verify: func(t *testing.T, info os.FileInfo) {
-        require.False(t, info.IsDir())
-        require.Equal(t, "file.txt", info.Name())
-        require.Equal(t, int64(7), info.Size())
-      },
-    },
-    {
-      name: "Stat a directory",
-      path: filepath.Join(root, "dir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "dir")},
-      },
-      verify: func(t *testing.T, info os.FileInfo) {
-        require.True(t, info.IsDir())
-        require.Equal(t, "dir", info.Name())
-      },
-    },
-    {
-      name: "Stat non-existent path",
-      path: filepath.Join(root, "nonexistent"),
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Stat symlink to file",
-      path: filepath.Join(root, "link_to_file"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_file"): "file.txt",
-        },
-      },
-      verify: func(t *testing.T, info os.FileInfo) {
-        require.False(t, info.IsDir())
-        require.Equal(t, "link_to_file", info.Name())
-        require.Equal(t, int64(7), info.Size())
-      },
-    },
-    {
-      name: "Stat symlink to dir",
-      path: filepath.Join(root, "link_to_dir"),
-      setup: unittestSetup{
-        initialDirs: []string{filepath.Join(root, "dir")},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link_to_dir"): "dir",
-        },
-      },
-      verify: func(t *testing.T, info os.FileInfo) {
-        require.True(t, info.IsDir())
-        require.Equal(t, "link_to_dir", info.Name())
-      },
-    },
-    {
-      name: "Stat broken symlink",
-      path: filepath.Join(root, "broken_link"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "broken_link"): "nonexistent",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: os.ErrNotExist,
-      },
-    },
-    {
-      name: "Stat symlink to symlink",
-      path: filepath.Join(root, "link1"),
-      setup: unittestSetup{
-        initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "link1"): "link2",
-          filepath.Join(root, "link2"): "file.txt",
-        },
-      },
-      verify: func(t *testing.T, info os.FileInfo) {
-        require.False(t, info.IsDir())
-        require.Equal(t, "link1", info.Name())
-        require.Equal(t, int64(7), info.Size())
-      },
-    },
-    {
-      name: "Stat symlink loop",
-      path: filepath.Join(root, "loop1"),
-      setup: unittestSetup{
-        initialSymlinks: map[string]string{
-          filepath.Join(root, "loop1"): "loop2",
-          filepath.Join(root, "loop2"): "loop1",
-        },
-      },
-      expectedError: expectedError{
-        wantErrIs: syscall.ELOOP,
-      },
-    },
-  }
+	root := getTestRoot()
+	tests := []struct {
+		name   string
+		setup  unittestSetup
+		path   string
+		verify func(t *testing.T, info os.FileInfo)
+		expectedError
+	}{
+		{
+			name: "Stat a file",
+			path: filepath.Join(root, "file.txt"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
+			},
+			verify: func(t *testing.T, info os.FileInfo) {
+				require.False(t, info.IsDir())
+				require.Equal(t, "file.txt", info.Name())
+				require.Equal(t, int64(7), info.Size())
+			},
+		},
+		{
+			name: "Stat a directory",
+			path: filepath.Join(root, "dir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "dir")},
+			},
+			verify: func(t *testing.T, info os.FileInfo) {
+				require.True(t, info.IsDir())
+				require.Equal(t, "dir", info.Name())
+			},
+		},
+		{
+			name: "Stat non-existent path",
+			path: filepath.Join(root, "nonexistent"),
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Stat symlink to file",
+			path: filepath.Join(root, "link_to_file"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_file"): "file.txt",
+				},
+			},
+			verify: func(t *testing.T, info os.FileInfo) {
+				require.False(t, info.IsDir())
+				require.Equal(t, "link_to_file", info.Name())
+				require.Equal(t, int64(7), info.Size())
+			},
+		},
+		{
+			name: "Stat symlink to dir",
+			path: filepath.Join(root, "link_to_dir"),
+			setup: unittestSetup{
+				initialDirs: []string{filepath.Join(root, "dir")},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link_to_dir"): "dir",
+				},
+			},
+			verify: func(t *testing.T, info os.FileInfo) {
+				require.True(t, info.IsDir())
+				require.Equal(t, "link_to_dir", info.Name())
+			},
+		},
+		{
+			name: "Stat broken symlink",
+			path: filepath.Join(root, "broken_link"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "broken_link"): "nonexistent",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: os.ErrNotExist,
+			},
+		},
+		{
+			name: "Stat symlink to symlink",
+			path: filepath.Join(root, "link1"),
+			setup: unittestSetup{
+				initialFiles: map[string]string{filepath.Join(root, "file.txt"): "content"},
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "link1"): "link2",
+					filepath.Join(root, "link2"): "file.txt",
+				},
+			},
+			verify: func(t *testing.T, info os.FileInfo) {
+				require.False(t, info.IsDir())
+				require.Equal(t, "link1", info.Name())
+				require.Equal(t, int64(7), info.Size())
+			},
+		},
+		{
+			name: "Stat symlink loop",
+			path: filepath.Join(root, "loop1"),
+			setup: unittestSetup{
+				initialSymlinks: map[string]string{
+					filepath.Join(root, "loop1"): "loop2",
+					filepath.Join(root, "loop2"): "loop1",
+				},
+			},
+			expectedError: expectedError{
+				wantErrIs: syscall.ELOOP,
+			},
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      wrapper := tc.setup.setup(t)
-      info, err := wrapper.Stat(tc.path)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			wrapper := tc.setup.setup(t)
+			info, err := wrapper.Stat(tc.path)
 
-      if tc.expectedError.Check(t, err) {
-        return
-      }
+			if tc.expectedError.Check(t, err) {
+				return
+			}
 
-      if tc.verify != nil {
-        tc.verify(t, info)
-      }
-    })
-  }
+			if tc.verify != nil {
+				tc.verify(t, info)
+			}
+		})
+	}
 }
 
 func TestFSTestOSWrapper_Stat_MatchesReal(t *testing.T) {
-  tests := []struct {
-    name  string
-    setup matchesRealSetup
-    path  string
-  }{
-    {
-      name: "Stat a file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{
-          "file.txt": "content",
-        },
-      }},
-      path: "file.txt",
-    },
-    {
-      name: "Stat a directory",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{
-          "dir",
-        },
-      }},
-      path: "dir",
-    },
-    {
-      name: "Stat non-existent path",
-      path: "nonexistent",
-    },
-    {
-      name: "Stat empty path",
-      path: "",
-    },
-    {
-      name: "Stat symlink to file",
-      setup: matchesRealSetup{unittestSetup{
-        initialFiles: map[string]string{"file.txt": "content"},
-        initialSymlinks: map[string]string{
-          "link_to_file": "file.txt",
-        },
-      }},
-      path: "link_to_file",
-    },
-    {
-      name: "Stat symlink to dir",
-      setup: matchesRealSetup{unittestSetup{
-        initialDirs: []string{"dir"},
-        initialSymlinks: map[string]string{
-          "link_to_dir": "dir",
-        },
-      }},
-      path: "link_to_dir",
-    },
-    {
-      name: "Stat broken symlink",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "broken_link": "nonexistent",
-        },
-      }},
-      path: "broken_link",
-    },
-    {
-      name: "Stat symlink loop",
-      setup: matchesRealSetup{unittestSetup{
-        initialSymlinks: map[string]string{
-          "loop1": "loop2",
-          "loop2": "loop1",
-        },
-      }},
-      path: "loop1",
-    },
-  }
+	tests := []struct {
+		name  string
+		setup matchesRealSetup
+		path  string
+	}{
+		{
+			name: "Stat a file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{
+					"file.txt": "content",
+				},
+			}},
+			path: "file.txt",
+		},
+		{
+			name: "Stat a directory",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{
+					"dir",
+				},
+			}},
+			path: "dir",
+		},
+		{
+			name: "Stat non-existent path",
+			path: "nonexistent",
+		},
+		{
+			name: "Stat empty path",
+			path: "",
+		},
+		{
+			name: "Stat symlink to file",
+			setup: matchesRealSetup{unittestSetup{
+				initialFiles: map[string]string{"file.txt": "content"},
+				initialSymlinks: map[string]string{
+					"link_to_file": "file.txt",
+				},
+			}},
+			path: "link_to_file",
+		},
+		{
+			name: "Stat symlink to dir",
+			setup: matchesRealSetup{unittestSetup{
+				initialDirs: []string{"dir"},
+				initialSymlinks: map[string]string{
+					"link_to_dir": "dir",
+				},
+			}},
+			path: "link_to_dir",
+		},
+		{
+			name: "Stat broken symlink",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"broken_link": "nonexistent",
+				},
+			}},
+			path: "broken_link",
+		},
+		{
+			name: "Stat symlink loop",
+			setup: matchesRealSetup{unittestSetup{
+				initialSymlinks: map[string]string{
+					"loop1": "loop2",
+					"loop2": "loop1",
+				},
+			}},
+			path: "loop1",
+		},
+	}
 
-  for _, tc := range tests {
-    t.Run(tc.name, func(t *testing.T) {
-      realRoot, realFS, testFS := tc.setup.setup(t)
-      defer os.RemoveAll(realRoot)
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			realRoot, realFS, testFS := tc.setup.setup(t)
+			defer os.RemoveAll(realRoot)
 
-      // Execute
-      realInfo, realErr := realFS.Stat(filepath.Join(realRoot, tc.path))
-      testInfo, testErr := testFS.Stat(tc.path)
+			// Execute
+			realInfo, realErr := realFS.Stat(filepath.Join(realRoot, tc.path))
+			testInfo, testErr := testFS.Stat(tc.path)
 
-      requireErrorsMatch(t, realErr, testErr)
-      if realErr == nil {
-        // An empty path appears to be treated as the CWD, so the real and test
-        // names cannot be directly compared.
-        // TODO(crbug.com/436025865): Update this to check for the fake CWD
-        // instead of "." when the filesystem is CWD-aware.
-        if tc.path == "" {
-          require.Equal(t, testInfo.Name(), ".")
-          require.Equal(t, realInfo.Name(), filepath.Base(realRoot))
-        } else {
-          require.Equal(t, realInfo.Name(), testInfo.Name())
-        }
-        require.Equal(t, realInfo.IsDir(), testInfo.IsDir())
-        // The size of a directory is system-dependent, so only compare sizes for files.
-        if !realInfo.IsDir() {
-          require.Equal(t, realInfo.Size(), testInfo.Size())
-        }
-      }
-    })
-  }
+			requireErrorsMatch(t, realErr, testErr)
+			if realErr == nil {
+				// An empty path appears to be treated as the CWD, so the real and test
+				// names cannot be directly compared.
+				// TODO(crbug.com/436025865): Update this to check for the fake CWD
+				// instead of "." when the filesystem is CWD-aware.
+				if tc.path == "" {
+					require.Equal(t, testInfo.Name(), ".")
+					require.Equal(t, realInfo.Name(), filepath.Base(realRoot))
+				} else {
+					require.Equal(t, realInfo.Name(), testInfo.Name())
+				}
+				require.Equal(t, realInfo.IsDir(), testInfo.IsDir())
+				// The size of a directory is system-dependent, so only compare sizes for files.
+				if !realInfo.IsDir() {
+					require.Equal(t, realInfo.Size(), testInfo.Size())
+				}
+			}
+		})
+	}
 }