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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_WRITER_GLSL_TEST_HELPER_H_
#define SRC_WRITER_GLSL_TEST_HELPER_H_
#include <memory>
#include <string>
#include <utility>
#include "gtest/gtest.h"
#include "src/transform/glsl.h"
#include "src/transform/manager.h"
#include "src/transform/renamer.h"
#include "src/writer/glsl/generator_impl.h"
namespace tint {
namespace writer {
namespace glsl {
/// Helper class for testing
template <typename BODY>
class TestHelperBase : public BODY, public ProgramBuilder {
public:
TestHelperBase() = default;
~TestHelperBase() override = default;
/// Builds the program and returns a GeneratorImpl from the program.
/// @note The generator is only built once. Multiple calls to Build() will
/// return the same GeneratorImpl without rebuilding.
/// @return the built generator
GeneratorImpl& Build() {
if (gen_) {
return *gen_;
}
// Fake that the GLSL sanitizer has been applied, so that we can unit test
// the writer without it erroring.
SetTransformApplied<transform::Glsl>();
[&]() {
ASSERT_TRUE(IsValid()) << "Builder program is not valid\n"
<< diag::Formatter().format(Diagnostics());
}();
program = std::make_unique<Program>(std::move(*this));
[&]() {
ASSERT_TRUE(program->IsValid())
<< diag::Formatter().format(program->Diagnostics());
}();
gen_ = std::make_unique<GeneratorImpl>(program.get());
return *gen_;
}
/// Builds the program, runs the program through the transform::Glsl sanitizer
/// and returns a GeneratorImpl from the sanitized program.
/// @note The generator is only built once. Multiple calls to Build() will
/// return the same GeneratorImpl without rebuilding.
/// @return the built generator
GeneratorImpl& SanitizeAndBuild() {
if (gen_) {
return *gen_;
}
diag::Formatter formatter;
[&]() {
ASSERT_TRUE(IsValid()) << "Builder program is not valid\n"
<< formatter.format(Diagnostics());
}();
program = std::make_unique<Program>(std::move(*this));
[&]() {
ASSERT_TRUE(program->IsValid())
<< formatter.format(program->Diagnostics());
}();
transform::Manager transform_manager;
transform::DataMap transform_data;
transform_data.Add<transform::Renamer::Config>(
transform::Renamer::Target::kGlslKeywords);
transform_manager.Add<tint::transform::Renamer>();
transform_manager.Add<tint::transform::Glsl>();
auto result = transform_manager.Run(program.get(), transform_data);
[&]() {
ASSERT_TRUE(result.program.IsValid())
<< formatter.format(result.program.Diagnostics());
}();
*program = std::move(result.program);
gen_ = std::make_unique<GeneratorImpl>(program.get());
return *gen_;
}
/// The program built with a call to Build()
std::unique_ptr<Program> program;
private:
std::unique_ptr<GeneratorImpl> gen_;
};
using TestHelper = TestHelperBase<testing::Test>;
template <typename T>
using TestParamHelper = TestHelperBase<testing::TestWithParam<T>>;
} // namespace glsl
} // namespace writer
} // namespace tint
#endif // SRC_WRITER_GLSL_TEST_HELPER_H_