src/dawn/tests/unittests/ErrorTests.cpp - dawn - Git at Google

 // Copyright 2018 The Dawn & Tint Authors
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 // 1. Redistributions of source code must retain the above copyright notice, this
 //    list of conditions and the following disclaimer.
 //
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 //    this list of conditions and the following disclaimer in the documentation
 //    and/or other materials provided with the distribution.
 //
 // 3. Neither the name of the copyright holder nor the names of its
 //    contributors may be used to endorse or promote products derived from
 //    this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include <memory>

 #include "dawn/native/Error.h"
 #include "dawn/native/ErrorData.h"
 #include "gtest/gtest.h"

 namespace dawn::native {
 namespace {

 int placeholderSuccess = 0xbeef;
 constexpr const char* placeholderErrorMessage = "I am an error message :3";

 // Check returning a success MaybeError with {};
 TEST(ErrorTests, Error_Success) {
     auto ReturnSuccess = []() -> MaybeError { return {}; };

     MaybeError result = ReturnSuccess();
     ASSERT_TRUE(result.IsSuccess());
 }

 // Check returning an error MaybeError with "return DAWN_VALIDATION_ERROR"
 TEST(ErrorTests, Error_Error) {
     auto ReturnError = []() -> MaybeError {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     MaybeError result = ReturnError();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check returning a success ResultOrError with an implicit conversion
 TEST(ErrorTests, ResultOrError_Success) {
     auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

     ResultOrError<int*> result = ReturnSuccess();
     ASSERT_TRUE(result.IsSuccess());
     ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
 }

 // Check returning an error ResultOrError with "return DAWN_VALIDATION_ERROR"
 TEST(ErrorTests, ResultOrError_Error) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     ResultOrError<int*> result = ReturnError();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check DAWN_TRY handles successes correctly.
 TEST(ErrorTests, TRY_Success) {
     auto ReturnSuccess = []() -> MaybeError { return {}; };

     // We need to check that DAWN_TRY doesn't return on successes
     bool tryReturned = true;

     auto Try = [ReturnSuccess, &tryReturned]() -> MaybeError {
         DAWN_TRY(ReturnSuccess());
         tryReturned = false;
         return {};
     };

     MaybeError result = Try();
     ASSERT_TRUE(result.IsSuccess());
     ASSERT_FALSE(tryReturned);
 }

 // Check DAWN_TRY handles errors correctly.
 TEST(ErrorTests, TRY_Error) {
     auto ReturnError = []() -> MaybeError {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> MaybeError {
         DAWN_TRY(ReturnError());
         // DAWN_TRY should return before this point
         EXPECT_FALSE(true);
         return {};
     };

     MaybeError result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check DAWN_TRY adds to the backtrace.
 TEST(ErrorTests, TRY_AddsToBacktrace) {
     auto ReturnError = []() -> MaybeError {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto SingleTry = [ReturnError]() -> MaybeError {
         DAWN_TRY(ReturnError());
         return {};
     };

     auto DoubleTry = [SingleTry]() -> MaybeError {
         DAWN_TRY(SingleTry());
         return {};
     };

     MaybeError singleResult = SingleTry();
     ASSERT_TRUE(singleResult.IsError());

     MaybeError doubleResult = DoubleTry();
     ASSERT_TRUE(doubleResult.IsError());

     std::unique_ptr<ErrorData> singleData = singleResult.AcquireError();
     std::unique_ptr<ErrorData> doubleData = doubleResult.AcquireError();

     // Backtraces are only added in debug mode.
 #if defined(DAWN_ENABLE_ASSERTS)
     ASSERT_EQ(singleData->GetBacktrace().size() + 1, doubleData->GetBacktrace().size());
 #else
     ASSERT_EQ(singleData->GetBacktrace().size(), doubleData->GetBacktrace().size());
 #endif
 }

 // Check DAWN_TRY_ASSIGN handles successes correctly.
 TEST(ErrorTests, TRY_RESULT_Success) {
     auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

     // We need to check that DAWN_TRY doesn't return on successes
     bool tryReturned = true;

     auto Try = [ReturnSuccess, &tryReturned]() -> ResultOrError<int*> {
         int* result = nullptr;
         DAWN_TRY_ASSIGN(result, ReturnSuccess());
         tryReturned = false;

         EXPECT_EQ(result, &placeholderSuccess);
         return result;
     };

     ResultOrError<int*> result = Try();
     ASSERT_TRUE(result.IsSuccess());
     ASSERT_FALSE(tryReturned);
     ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
 }

 // Check DAWN_TRY_ASSIGN handles errors correctly.
 TEST(ErrorTests, TRY_RESULT_Error) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> ResultOrError<int*> {
         [[maybe_unused]] int* result = nullptr;
         DAWN_TRY_ASSIGN(result, ReturnError());

         // DAWN_TRY should return before this point
         EXPECT_FALSE(true);
         return &placeholderSuccess;
     };

     ResultOrError<int*> result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check DAWN_TRY_ASSIGN adds to the backtrace.
 TEST(ErrorTests, TRY_RESULT_AddsToBacktrace) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto SingleTry = [ReturnError]() -> ResultOrError<int*> {
         DAWN_TRY(ReturnError());
         return &placeholderSuccess;
     };

     auto DoubleTry = [SingleTry]() -> ResultOrError<int*> {
         DAWN_TRY(SingleTry());
         return &placeholderSuccess;
     };

     ResultOrError<int*> singleResult = SingleTry();
     ASSERT_TRUE(singleResult.IsError());

     ResultOrError<int*> doubleResult = DoubleTry();
     ASSERT_TRUE(doubleResult.IsError());

     std::unique_ptr<ErrorData> singleData = singleResult.AcquireError();
     std::unique_ptr<ErrorData> doubleData = doubleResult.AcquireError();

     // Backtraces are only added in debug mode.
 #if defined(DAWN_ENABLE_ASSERTS)
     ASSERT_EQ(singleData->GetBacktrace().size() + 1, doubleData->GetBacktrace().size());
 #else
     ASSERT_EQ(singleData->GetBacktrace().size(), doubleData->GetBacktrace().size());
 #endif
 }

 // Check a ResultOrError can be DAWN_TRY_ASSIGNED in a function that returns an Error
 TEST(ErrorTests, TRY_RESULT_ConversionToError) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> MaybeError {
         [[maybe_unused]] int* result = nullptr;
         DAWN_TRY_ASSIGN(result, ReturnError());

         return {};
     };

     MaybeError result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check a ResultOrError can be DAWN_TRY_ASSIGNED in a function that returns an Error
 // Version without Result<E*, T*>
 TEST(ErrorTests, TRY_RESULT_ConversionToErrorNonPointer) {
     auto ReturnError = []() -> ResultOrError<int> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> MaybeError {
         [[maybe_unused]] int result = 0;
         DAWN_TRY_ASSIGN(result, ReturnError());

         return {};
     };

     MaybeError result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check DAWN_TRY_ASSIGN handles successes correctly.
 TEST(ErrorTests, TRY_RESULT_CLEANUP_Success) {
     auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

     // We need to check that DAWN_TRY_ASSIGN_WITH_CLEANUP doesn't return on successes and the
     // cleanup is not called.
     bool tryReturned = true;
     bool tryCleanup = false;

     auto Try = [ReturnSuccess, &tryReturned, &tryCleanup]() -> ResultOrError<int*> {
         int* result = nullptr;
         DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnSuccess(), { tryCleanup = true; });
         tryReturned = false;

         EXPECT_EQ(result, &placeholderSuccess);
         return result;
     };

     ResultOrError<int*> result = Try();
     ASSERT_TRUE(result.IsSuccess());
     ASSERT_FALSE(tryReturned);
     ASSERT_FALSE(tryCleanup);
     ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
 }

 // Check DAWN_TRY_ASSIGN handles cleanups.
 TEST(ErrorTests, TRY_RESULT_CLEANUP_Cleanup) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     // We need to check that DAWN_TRY_ASSIGN_WITH_CLEANUP calls cleanup when error.
     bool tryCleanup = false;

     auto Try = [ReturnError, &tryCleanup]() -> ResultOrError<int*> {
         [[maybe_unused]] int* result = nullptr;
         DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnError(), { tryCleanup = true; });

         // DAWN_TRY_ASSIGN_WITH_CLEANUP should return before this point
         EXPECT_FALSE(true);
         return &placeholderSuccess;
     };

     ResultOrError<int*> result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
     ASSERT_TRUE(tryCleanup);
 }

 // Check DAWN_TRY_ASSIGN can override return value when needed.
 TEST(ErrorTests, TRY_RESULT_CLEANUP_OverrideReturn) {
     auto ReturnError = []() -> ResultOrError<int*> {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> bool {
         [[maybe_unused]] int* result = nullptr;
         DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnError(), {}, true);

         // DAWN_TRY_ASSIGN_WITH_CLEANUP should return before this point
         EXPECT_FALSE(true);
         return false;
     };

     bool result = Try();
     ASSERT_TRUE(result);
 }

 // Check a MaybeError can be DAWN_TRIED in a function that returns an ResultOrError
 // Check DAWN_TRY handles errors correctly.
 TEST(ErrorTests, TRY_ConversionToErrorOrResult) {
     auto ReturnError = []() -> MaybeError {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> ResultOrError<int*> {
         DAWN_TRY(ReturnError());
         return &placeholderSuccess;
     };

     ResultOrError<int*> result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 // Check a MaybeError can be DAWN_TRIED in a function that returns an ResultOrError
 // Check DAWN_TRY handles errors correctly. Version without Result<E*, T*>
 TEST(ErrorTests, TRY_ConversionToErrorOrResultNonPointer) {
     auto ReturnError = []() -> MaybeError {
         return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
     };

     auto Try = [ReturnError]() -> ResultOrError<int> {
         DAWN_TRY(ReturnError());
         return 42;
     };

     ResultOrError<int> result = Try();
     ASSERT_TRUE(result.IsError());

     std::unique_ptr<ErrorData> errorData = result.AcquireError();
     ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
 }

 }  // namespace
 }  // namespace dawn::native
	// Copyright 2018 The Dawn & Tint Authors
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// 1. Redistributions of source code must retain the above copyright notice, this
	// list of conditions and the following disclaimer.
	//
	// 2. Redistributions in binary form must reproduce the above copyright notice,
	// this list of conditions and the following disclaimer in the documentation
	// and/or other materials provided with the distribution.
	//
	// 3. Neither the name of the copyright holder nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include <memory>

	#include "dawn/native/Error.h"
	#include "dawn/native/ErrorData.h"
	#include "gtest/gtest.h"

	namespace dawn::native {
	namespace {

	int placeholderSuccess = 0xbeef;
	constexpr const char* placeholderErrorMessage = "I am an error message :3";

	// Check returning a success MaybeError with {};
	TEST(ErrorTests, Error_Success) {
	auto ReturnSuccess = []() -> MaybeError { return {}; };

	MaybeError result = ReturnSuccess();
	ASSERT_TRUE(result.IsSuccess());
	}

	// Check returning an error MaybeError with "return DAWN_VALIDATION_ERROR"
	TEST(ErrorTests, Error_Error) {
	auto ReturnError = []() -> MaybeError {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	MaybeError result = ReturnError();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check returning a success ResultOrError with an implicit conversion
	TEST(ErrorTests, ResultOrError_Success) {
	auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

	ResultOrError<int*> result = ReturnSuccess();
	ASSERT_TRUE(result.IsSuccess());
	ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
	}

	// Check returning an error ResultOrError with "return DAWN_VALIDATION_ERROR"
	TEST(ErrorTests, ResultOrError_Error) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	ResultOrError<int*> result = ReturnError();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check DAWN_TRY handles successes correctly.
	TEST(ErrorTests, TRY_Success) {
	auto ReturnSuccess = []() -> MaybeError { return {}; };

	// We need to check that DAWN_TRY doesn't return on successes
	bool tryReturned = true;

	auto Try = [ReturnSuccess, &tryReturned]() -> MaybeError {
	DAWN_TRY(ReturnSuccess());
	tryReturned = false;
	return {};
	};

	MaybeError result = Try();
	ASSERT_TRUE(result.IsSuccess());
	ASSERT_FALSE(tryReturned);
	}

	// Check DAWN_TRY handles errors correctly.
	TEST(ErrorTests, TRY_Error) {
	auto ReturnError = []() -> MaybeError {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> MaybeError {
	DAWN_TRY(ReturnError());
	// DAWN_TRY should return before this point
	EXPECT_FALSE(true);
	return {};
	};

	MaybeError result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check DAWN_TRY adds to the backtrace.
	TEST(ErrorTests, TRY_AddsToBacktrace) {
	auto ReturnError = []() -> MaybeError {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto SingleTry = [ReturnError]() -> MaybeError {
	DAWN_TRY(ReturnError());
	return {};
	};

	auto DoubleTry = [SingleTry]() -> MaybeError {
	DAWN_TRY(SingleTry());
	return {};
	};

	MaybeError singleResult = SingleTry();
	ASSERT_TRUE(singleResult.IsError());

	MaybeError doubleResult = DoubleTry();
	ASSERT_TRUE(doubleResult.IsError());

	std::unique_ptr<ErrorData> singleData = singleResult.AcquireError();
	std::unique_ptr<ErrorData> doubleData = doubleResult.AcquireError();

	// Backtraces are only added in debug mode.
	#if defined(DAWN_ENABLE_ASSERTS)
	ASSERT_EQ(singleData->GetBacktrace().size() + 1, doubleData->GetBacktrace().size());
	#else
	ASSERT_EQ(singleData->GetBacktrace().size(), doubleData->GetBacktrace().size());
	#endif
	}

	// Check DAWN_TRY_ASSIGN handles successes correctly.
	TEST(ErrorTests, TRY_RESULT_Success) {
	auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

	// We need to check that DAWN_TRY doesn't return on successes
	bool tryReturned = true;

	auto Try = [ReturnSuccess, &tryReturned]() -> ResultOrError<int*> {
	int* result = nullptr;
	DAWN_TRY_ASSIGN(result, ReturnSuccess());
	tryReturned = false;

	EXPECT_EQ(result, &placeholderSuccess);
	return result;
	};

	ResultOrError<int*> result = Try();
	ASSERT_TRUE(result.IsSuccess());
	ASSERT_FALSE(tryReturned);
	ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
	}

	// Check DAWN_TRY_ASSIGN handles errors correctly.
	TEST(ErrorTests, TRY_RESULT_Error) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> ResultOrError<int*> {
	[[maybe_unused]] int* result = nullptr;
	DAWN_TRY_ASSIGN(result, ReturnError());

	// DAWN_TRY should return before this point
	EXPECT_FALSE(true);
	return &placeholderSuccess;
	};

	ResultOrError<int*> result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check DAWN_TRY_ASSIGN adds to the backtrace.
	TEST(ErrorTests, TRY_RESULT_AddsToBacktrace) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto SingleTry = [ReturnError]() -> ResultOrError<int*> {
	DAWN_TRY(ReturnError());
	return &placeholderSuccess;
	};

	auto DoubleTry = [SingleTry]() -> ResultOrError<int*> {
	DAWN_TRY(SingleTry());
	return &placeholderSuccess;
	};

	ResultOrError<int*> singleResult = SingleTry();
	ASSERT_TRUE(singleResult.IsError());

	ResultOrError<int*> doubleResult = DoubleTry();
	ASSERT_TRUE(doubleResult.IsError());

	std::unique_ptr<ErrorData> singleData = singleResult.AcquireError();
	std::unique_ptr<ErrorData> doubleData = doubleResult.AcquireError();

	// Backtraces are only added in debug mode.
	#if defined(DAWN_ENABLE_ASSERTS)
	ASSERT_EQ(singleData->GetBacktrace().size() + 1, doubleData->GetBacktrace().size());
	#else
	ASSERT_EQ(singleData->GetBacktrace().size(), doubleData->GetBacktrace().size());
	#endif
	}

	// Check a ResultOrError can be DAWN_TRY_ASSIGNED in a function that returns an Error
	TEST(ErrorTests, TRY_RESULT_ConversionToError) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> MaybeError {
	[[maybe_unused]] int* result = nullptr;
	DAWN_TRY_ASSIGN(result, ReturnError());

	return {};
	};

	MaybeError result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check a ResultOrError can be DAWN_TRY_ASSIGNED in a function that returns an Error
	// Version without Result<E, T>
	TEST(ErrorTests, TRY_RESULT_ConversionToErrorNonPointer) {
	auto ReturnError = []() -> ResultOrError<int> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> MaybeError {
	[[maybe_unused]] int result = 0;
	DAWN_TRY_ASSIGN(result, ReturnError());

	return {};
	};

	MaybeError result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check DAWN_TRY_ASSIGN handles successes correctly.
	TEST(ErrorTests, TRY_RESULT_CLEANUP_Success) {
	auto ReturnSuccess = []() -> ResultOrError<int*> { return &placeholderSuccess; };

	// We need to check that DAWN_TRY_ASSIGN_WITH_CLEANUP doesn't return on successes and the
	// cleanup is not called.
	bool tryReturned = true;
	bool tryCleanup = false;

	auto Try = [ReturnSuccess, &tryReturned, &tryCleanup]() -> ResultOrError<int*> {
	int* result = nullptr;
	DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnSuccess(), { tryCleanup = true; });
	tryReturned = false;

	EXPECT_EQ(result, &placeholderSuccess);
	return result;
	};

	ResultOrError<int*> result = Try();
	ASSERT_TRUE(result.IsSuccess());
	ASSERT_FALSE(tryReturned);
	ASSERT_FALSE(tryCleanup);
	ASSERT_EQ(result.AcquireSuccess(), &placeholderSuccess);
	}

	// Check DAWN_TRY_ASSIGN handles cleanups.
	TEST(ErrorTests, TRY_RESULT_CLEANUP_Cleanup) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	// We need to check that DAWN_TRY_ASSIGN_WITH_CLEANUP calls cleanup when error.
	bool tryCleanup = false;

	auto Try = [ReturnError, &tryCleanup]() -> ResultOrError<int*> {
	[[maybe_unused]] int* result = nullptr;
	DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnError(), { tryCleanup = true; });

	// DAWN_TRY_ASSIGN_WITH_CLEANUP should return before this point
	EXPECT_FALSE(true);
	return &placeholderSuccess;
	};

	ResultOrError<int*> result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	ASSERT_TRUE(tryCleanup);
	}

	// Check DAWN_TRY_ASSIGN can override return value when needed.
	TEST(ErrorTests, TRY_RESULT_CLEANUP_OverrideReturn) {
	auto ReturnError = []() -> ResultOrError<int*> {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> bool {
	[[maybe_unused]] int* result = nullptr;
	DAWN_TRY_ASSIGN_WITH_CLEANUP(result, ReturnError(), {}, true);

	// DAWN_TRY_ASSIGN_WITH_CLEANUP should return before this point
	EXPECT_FALSE(true);
	return false;
	};

	bool result = Try();
	ASSERT_TRUE(result);
	}

	// Check a MaybeError can be DAWN_TRIED in a function that returns an ResultOrError
	// Check DAWN_TRY handles errors correctly.
	TEST(ErrorTests, TRY_ConversionToErrorOrResult) {
	auto ReturnError = []() -> MaybeError {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> ResultOrError<int*> {
	DAWN_TRY(ReturnError());
	return &placeholderSuccess;
	};

	ResultOrError<int*> result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	// Check a MaybeError can be DAWN_TRIED in a function that returns an ResultOrError
	// Check DAWN_TRY handles errors correctly. Version without Result<E, T>
	TEST(ErrorTests, TRY_ConversionToErrorOrResultNonPointer) {
	auto ReturnError = []() -> MaybeError {
	return DAWN_VALIDATION_ERROR(placeholderErrorMessage);
	};

	auto Try = [ReturnError]() -> ResultOrError<int> {
	DAWN_TRY(ReturnError());
	return 42;
	};

	ResultOrError<int> result = Try();
	ASSERT_TRUE(result.IsError());

	std::unique_ptr<ErrorData> errorData = result.AcquireError();
	ASSERT_EQ(errorData->GetMessage(), placeholderErrorMessage);
	}

	} // namespace
	} // namespace dawn::native