// Copyright 2025 The Dawn & Tint Authors
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package common

// Write unittests for defaultCtsPath().
import (
	"path/filepath"
	"testing"

	"dawn.googlesource.com/dawn/tools/src/fileutils"
	"dawn.googlesource.com/dawn/tools/src/oswrapper"
	"github.com/stretchr/testify/require"
)

func TestDefaultCtsPath_NoDawnRoot(t *testing.T) {
	wrapper := oswrapper.CreateMemMapOSWrapper()
	require.Equal(t, defaultCtsPath(wrapper), "")
}

func TestDefaultCtsPath_NoCts(t *testing.T) {
	wrapper, err := fileutils.CreateMemMapOSWrapperWithFakeDawnRoot()
	require.NoErrorf(t, err, "Error creating fake Dawn root: %v", err)
	require.Equal(t, defaultCtsPath(wrapper), "")
}

func TestDefaultCtsPath_CtsExists(t *testing.T) {
	wrapper, err := fileutils.CreateMemMapOSWrapperWithFakeDawnRoot()
	require.NoErrorf(t, err, "Error creating fake Dawn root: %v", err)
	expectedPath := filepath.Join(fileutils.DawnRoot(wrapper), "third_party", "webgpu-cts")
	wrapper.MkdirAll(expectedPath, 0o666)
	require.Equal(t, defaultCtsPath(wrapper), expectedPath)
}