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// Copyright 2017 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#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