| // Copyright 2017 The Dawn 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. |
| |
| #include <type_traits> |
| |
| #include "gtest/gtest.h" |
| |
| #include "dawn/common/Ref.h" |
| #include "dawn/common/RefCounted.h" |
| #include "dawn/native/ToBackend.h" |
| |
| // Make our own Base - Backend object pair, reusing the MyObjectBase name |
| namespace dawn::native { |
| |
| class MyObjectBase : public RefCounted {}; |
| |
| class MyObject : public MyObjectBase {}; |
| |
| struct MyBackendTraits { |
| using MyObjectType = MyObject; |
| }; |
| |
| template <typename BackendTraits> |
| struct ToBackendTraits<MyObjectBase, BackendTraits> { |
| using BackendType = typename BackendTraits::MyObjectType; |
| }; |
| |
| // Instantiate ToBackend for our "backend" |
| template <typename T> |
| auto ToBackend(T&& common) -> decltype(ToBackendBase<MyBackendTraits>(common)) { |
| return ToBackendBase<MyBackendTraits>(common); |
| } |
| |
| // Test that ToBackend correctly converts pointers to base classes. |
| TEST(ToBackend, Pointers) { |
| { |
| MyObject* myObject = new MyObject; |
| const MyObjectBase* base = myObject; |
| |
| auto* backendAdapter = ToBackend(base); |
| static_assert(std::is_same<decltype(backendAdapter), const MyObject*>::value); |
| ASSERT_EQ(myObject, backendAdapter); |
| |
| myObject->Release(); |
| } |
| { |
| MyObject* myObject = new MyObject; |
| MyObjectBase* base = myObject; |
| |
| auto* backendAdapter = ToBackend(base); |
| static_assert(std::is_same<decltype(backendAdapter), MyObject*>::value); |
| ASSERT_EQ(myObject, backendAdapter); |
| |
| myObject->Release(); |
| } |
| } |
| |
| // Test that ToBackend correctly converts Refs to base classes. |
| TEST(ToBackend, Ref) { |
| { |
| MyObject* myObject = new MyObject; |
| const Ref<MyObjectBase> base(myObject); |
| |
| const auto& backendAdapter = ToBackend(base); |
| static_assert(std::is_same<decltype(ToBackend(base)), const Ref<MyObject>&>::value); |
| ASSERT_EQ(myObject, backendAdapter.Get()); |
| |
| myObject->Release(); |
| } |
| { |
| MyObject* myObject = new MyObject; |
| Ref<MyObjectBase> base(myObject); |
| |
| auto backendAdapter = ToBackend(base); |
| static_assert(std::is_same<decltype(ToBackend(base)), Ref<MyObject>&>::value); |
| ASSERT_EQ(myObject, backendAdapter.Get()); |
| |
| myObject->Release(); |
| } |
| } |
| } // namespace dawn::native |