129 lines
4.0 KiB
C++
129 lines
4.0 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TRANSFORM_TEST_HELPER_H_
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#define SRC_TRANSFORM_TEST_HELPER_H_
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "gtest/gtest.h"
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#include "src/reader/wgsl/parser.h"
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#include "src/transform/manager.h"
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#include "src/writer/wgsl/generator.h"
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namespace tint {
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namespace transform {
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/// Helper class for testing transforms
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template <typename BASE>
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class TransformTestBase : public BASE {
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public:
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/// Transforms and returns the WGSL source `in`, transformed using
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/// `transforms`.
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/// @param in the input WGSL source
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/// @param transforms the list of transforms to apply
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/// @param data the optional DataMap to pass to Transform::Run()
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/// @return the transformed output
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Transform::Output Run(
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std::string in,
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std::vector<std::unique_ptr<transform::Transform>> transforms,
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DataMap data = {}) {
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auto file = std::make_unique<Source::File>("test", in);
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auto program = reader::wgsl::Parse(file.get());
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// Keep this pointer alive after Transform() returns
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files_.emplace_back(std::move(file));
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if (!program.IsValid()) {
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return Transform::Output(std::move(program));
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}
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Manager manager;
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for (auto& transform : transforms) {
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manager.append(std::move(transform));
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}
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return manager.Run(&program, data);
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}
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/// Transforms and returns the WGSL source `in`, transformed using
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/// `transform`.
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/// @param transform the transform to apply
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/// @param in the input WGSL source
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/// @param data the optional DataMap to pass to Transform::Run()
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/// @return the transformed output
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Transform::Output Run(std::string in,
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std::unique_ptr<transform::Transform> transform,
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DataMap data = {}) {
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std::vector<std::unique_ptr<transform::Transform>> transforms;
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transforms.emplace_back(std::move(transform));
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return Run(std::move(in), std::move(transforms), std::move(data));
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}
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/// Transforms and returns the WGSL source `in`, transformed using
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/// a transform of type `TRANSFORM`.
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/// @param in the input WGSL source
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/// @param data the optional DataMap to pass to Transform::Run()
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/// @return the transformed output
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template <typename TRANSFORM>
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Transform::Output Run(std::string in, DataMap data = {}) {
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return Run(std::move(in), std::make_unique<TRANSFORM>(), std::move(data));
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}
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/// @param output the output of the transform
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/// @returns the output program as a WGSL string, or an error string if the
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/// program is not valid.
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std::string str(const Transform::Output& output) {
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diag::Formatter::Style style;
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style.print_newline_at_end = false;
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if (!output.program.IsValid()) {
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return diag::Formatter(style).format(output.program.Diagnostics());
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}
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writer::wgsl::Generator generator(&output.program);
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if (!generator.Generate()) {
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return "WGSL writer failed:\n" + generator.error();
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}
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auto res = generator.result();
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if (res.empty()) {
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return res;
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}
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// The WGSL sometimes has two trailing newlines. Strip them
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while (res.back() == '\n') {
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res.pop_back();
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}
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if (res.empty()) {
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return res;
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}
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return "\n" + res + "\n";
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}
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private:
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std::vector<std::unique_ptr<Source::File>> files_;
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};
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using TransformTest = TransformTestBase<testing::Test>;
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template <typename T>
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using TransformTestWithParam = TransformTestBase<testing::TestWithParam<T>>;
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} // namespace transform
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} // namespace tint
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#endif // SRC_TRANSFORM_TEST_HELPER_H_
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