testing_platform_support.h | Explore in Territory

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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_TESTING_PLATFORM_SUPPORT_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_TESTING_PLATFORM_SUPPORT_H_

#include <memory>
#include <utility>

#include "base/auto_reset.h"
#include "base/check_op.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/test/scoped_feature_list.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/platform/heap/heap_test_utilities.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "v8/include/v8-platform.h"

namespace base {
class TestDiscardableMemoryAllocator;
}

namespace blink {

// A base class to override Platform methods for testing.  You can override the
// behavior by subclassing TestingPlatformSupport or using
// ScopedTestingPlatformSupport (see below).
class TestingPlatformSupport : public Platform { … };

// ScopedTestingPlatformSupport<MyTestingPlatformSupport> can be used to
// override Platform::current() with MyTestingPlatformSupport, like this:
//
// #include
// "third_party/blink/renderer/platform/testing/testing_platform_support.h"
//
// TEST_F(SampleTest, sampleTest) {
//   ScopedTestingPlatformSupport<MyTestingPlatformSupport> platform;
//   ...
//   // You can call methods of MyTestingPlatformSupport.
//   EXPECT_TRUE(platform->myMethodIsCalled());
//
//   // Another instance can be nested.
//   {
//     // Constructor's arguments can be passed like this.
//     Arg arg;
//     ScopedTestingPlatformSupport<MyAnotherTestingPlatformSupport, const Arg&>
//         another_platform(args);
//     ...
//   }
//
//   // Here the original MyTestingPlatformSupport should be restored.
// }
template <class T, typename... Args>
class ScopedTestingPlatformSupport final { … };

class ScopedUnittestsEnvironmentSetup final { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_TESTING_PLATFORM_SUPPORT_H_
chromium/third_party/blink/renderer/platform/testing/testing_platform_support.h
