third_party/blink/renderer/core/execution_context/pausable_object_test.cc

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#include "third_party/blink/renderer/core/execution_context/pausable_object.h"

#include <memory>
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/testing/dummy_page_holder.h"

namespace blink {

class MockPausableObject final
    : public GarbageCollectedFinalized<MockPausableObject>,
      public PausableObject {
  USING_GARBAGE_COLLECTED_MIXIN(MockPausableObject);

 public:
  explicit MockPausableObject(ExecutionContext* context)
      : PausableObject(context) {}

  void Trace(blink::Visitor* visitor) override {
    PausableObject::Trace(visitor);
  }

  MOCK_METHOD0(Pause, void());
  MOCK_METHOD0(Unpause, void());
  MOCK_METHOD1(ContextDestroyed, void(ExecutionContext*));
};

class PausableObjectTest : public testing::Test {
 protected:
  PausableObjectTest();

  Document& SrcDocument() const { return src_page_holder_->GetDocument(); }
  Document& DestDocument() const { return dest_page_holder_->GetDocument(); }
  MockPausableObject& PausableObject() { return *pausable_object_; }

 private:
  std::unique_ptr<DummyPageHolder> src_page_holder_;
  std::unique_ptr<DummyPageHolder> dest_page_holder_;
  Persistent<MockPausableObject> pausable_object_;
};

PausableObjectTest::PausableObjectTest()
    : src_page_holder_(DummyPageHolder::Create(IntSize(800, 600))),
      dest_page_holder_(DummyPageHolder::Create(IntSize(800, 600))),
      pausable_object_(MakeGarbageCollected<MockPausableObject>(
          &src_page_holder_->GetDocument())) {
  pausable_object_->PauseIfNeeded();
}

TEST_F(PausableObjectTest, NewContextObserved) {
  unsigned initial_src_count = SrcDocument().PausableObjectCount();
  unsigned initial_dest_count = DestDocument().PausableObjectCount();

  EXPECT_CALL(PausableObject(), Unpause());
  PausableObject().DidMoveToNewExecutionContext(&DestDocument());

  EXPECT_EQ(initial_src_count - 1, SrcDocument().PausableObjectCount());
  EXPECT_EQ(initial_dest_count + 1, DestDocument().PausableObjectCount());
}

TEST_F(PausableObjectTest, MoveToActiveDocument) {
  EXPECT_CALL(PausableObject(), Unpause());
  PausableObject().DidMoveToNewExecutionContext(&DestDocument());
}

TEST_F(PausableObjectTest, MoveToSuspendedDocument) {
  DestDocument().PauseScheduledTasks(PauseState::kFrozen);

  EXPECT_CALL(PausableObject(), Pause());
  PausableObject().DidMoveToNewExecutionContext(&DestDocument());
}

TEST_F(PausableObjectTest, MoveToStoppedDocument) {
  DestDocument().Shutdown();

  EXPECT_CALL(PausableObject(), ContextDestroyed(&DestDocument()));
  PausableObject().DidMoveToNewExecutionContext(&DestDocument());
}

}  // namespace blink