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// Copyright 2020 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_TINT_WRITER_WGSL_TEST_HELPER_H_
#define SRC_TINT_WRITER_WGSL_TEST_HELPER_H_
#include <memory>
#include <utility>
#include "gtest/gtest.h"
#include "src/tint/program_builder.h"
#include "src/tint/writer/wgsl/generator_impl.h"
namespace tint::writer::wgsl {
/// Helper class for testing
template <typename BASE>
class TestHelperBase : public BASE, public ProgramBuilder {
public:
TestHelperBase() = default;
~TestHelperBase() override = default;
/// Builds 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_;
}
program = std::make_unique<Program>(std::move(*this));
diag::Formatter formatter;
[&]() { ASSERT_TRUE(program->IsValid()) << formatter.format(program->Diagnostics()); }();
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 tint::writer::wgsl
#endif // SRC_TINT_WRITER_WGSL_TEST_HELPER_H_