| // 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_TRANSFORM_TEST_HELPER_H_ |
| #define SRC_TRANSFORM_TEST_HELPER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "gtest/gtest.h" |
| #include "src/reader/wgsl/parser.h" |
| #include "src/transform/manager.h" |
| #include "src/type_determiner.h" |
| #include "src/writer/wgsl/generator.h" |
| |
| namespace tint { |
| namespace transform { |
| |
| /// Helper class for testing transforms |
| class TransformTest : public testing::Test { |
| public: |
| /// Transforms and returns the WGSL source `in`, transformed using |
| /// `transforms`. |
| /// @param in the input WGSL source |
| /// @param transforms the list of transforms to apply |
| /// @return the transformed WGSL output |
| std::string Transform( |
| std::string in, |
| std::vector<std::unique_ptr<transform::Transform>> transforms) { |
| Source::File file("test", in); |
| reader::wgsl::Parser parser(&file); |
| if (!parser.Parse()) { |
| return "WGSL reader failed:\n" + parser.error(); |
| } |
| |
| auto module = parser.module(); |
| TypeDeterminer td(&module); |
| if (!td.Determine()) { |
| return "Type determination failed:\n" + td.error(); |
| } |
| |
| Manager manager; |
| for (auto& transform : transforms) { |
| manager.append(std::move(transform)); |
| } |
| auto result = manager.Run(&module); |
| |
| if (result.diagnostics.contains_errors()) { |
| diag::Formatter::Style style; |
| style.print_newline_at_end = false; |
| return "manager().Run() errored:\n" + |
| diag::Formatter(style).format(result.diagnostics); |
| } |
| |
| // Release the source module to ensure there's no uncloned data in result |
| { auto tmp = std::move(module); } |
| |
| writer::wgsl::Generator generator(std::move(result.module)); |
| if (!generator.Generate()) { |
| return "WGSL writer failed:\n" + generator.error(); |
| } |
| |
| auto res = generator.result(); |
| if (res.empty()) { |
| return res; |
| } |
| // The WGSL sometimes has two trailing newlines. Strip them |
| while (res.back() == '\n') { |
| res.pop_back(); |
| } |
| if (res.empty()) { |
| return res; |
| } |
| return "\n" + res + "\n"; |
| } |
| |
| /// Transforms and returns the WGSL source `in`, transformed using |
| /// `transform`. |
| /// @param transform the transform to apply |
| /// @param in the input WGSL source |
| /// @return the transformed WGSL output |
| std::string Transform(std::string in, |
| std::unique_ptr<transform::Transform> transform) { |
| std::vector<std::unique_ptr<transform::Transform>> transforms; |
| transforms.emplace_back(std::move(transform)); |
| return Transform(std::move(in), std::move(transforms)); |
| } |
| |
| /// Transforms and returns the WGSL source `in`, transformed using |
| /// a transform of type `TRANSFORM`. |
| /// @param in the input WGSL source |
| /// @param args the TRANSFORM constructor arguments |
| /// @return the transformed WGSL output |
| template <typename TRANSFORM, typename... ARGS> |
| std::string Transform(std::string in, ARGS&&... args) { |
| return Transform(std::move(in), |
| std::make_unique<TRANSFORM>(std::forward<ARGS>(args)...)); |
| } |
| }; |
| |
| } // namespace transform |
| } // namespace tint |
| |
| #endif // SRC_TRANSFORM_TEST_HELPER_H_ |