Add BeginFrameObserverProxy

content/browser/renderer_host/begin_frame_observer_proxy_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <algorithm>
+#include <list>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/test/test_simple_task_runner.h"
+#include "cc/output/begin_frame_args.h"
+#include "cc/test/begin_frame_args_test.h"
+#include "content/browser/renderer_host/begin_frame_observer_proxy.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/compositor/compositor.h"
+#include "ui/compositor/test/context_factories_for_test.h"
+
+using testing::Mock;
+using testing::_;
+
+namespace content {
+namespace {
+
+class MockBeginFrameObserverProxyClient : public BeginFrameObserverProxyClient {
+ public:
+  MOCK_METHOD1(SendBeginFrame, void(const cc::BeginFrameArgs&));
+};
+
+class BeginFrameObserverProxyTest : public testing::Test {
+ public:
+  BeginFrameObserverProxyTest() {}
+  ~BeginFrameObserverProxyTest() override {}
+
+  void SetUp() override {
+    bool enable_pixel_output = false;
+    ui::ContextFactory* context_factory =
+        ui::InitializeContextFactoryForTests(enable_pixel_output);
+    compositor_task_runner_ = new base::TestSimpleTaskRunner();
+    compositor_.reset(new ui::Compositor(gfx::kNullAcceleratedWidget,
+                                         context_factory,
+                                         compositor_task_runner_));
+  }
+
+  void TearDown() override {
+    compositor_.reset();
+    ui::TerminateContextFactoryForTests();
+  }
+
+  ui::Compositor* compositor() { return compositor_.get(); }
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
+  scoped_ptr<ui::Compositor> compositor_;
+};
+
+}  // namespace
+
+TEST_F(BeginFrameObserverProxyTest, BeginFrameScheduling) {
+  MockBeginFrameObserverProxyClient client;
+  BeginFrameObserverProxy begin_frame_observer(&client);
+  begin_frame_observer.SetCompositor(compositor());
+  begin_frame_observer.SetNeedsBeginFrames(true);
+
+  // SendBeginFrame is called when new |args| is delivered.
+  cc::BeginFrameArgs args =
+    cc::CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
+                                       base::TimeTicks::FromInternalValue(33));
+  EXPECT_CALL(client, SendBeginFrame(args));
+  compositor()->SendBeginFramesToChildren(args);
+  Mock::VerifyAndClearExpectations(&client);
+
+  // SendBeginFrame is called when new |args2| is delivered.
+  cc::BeginFrameArgs args2 =
+    cc::CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
+                                       base::TimeTicks::FromInternalValue(66));
+  EXPECT_CALL(client, SendBeginFrame(args2));
+  compositor()->SendBeginFramesToChildren(args2);
+  Mock::VerifyAndClearExpectations(&client);
+
+  // SendBeginFrame is not called when used |args2| is delivered.
+  EXPECT_CALL(client, SendBeginFrame(_)).Times(0);
+  compositor()->SendBeginFramesToChildren(args2);
+  Mock::VerifyAndClearExpectations(&client);
+
+  // SendBeginFrame is not called when compositor is reset.
+  begin_frame_observer.ResetCompositor();
+  cc::BeginFrameArgs args3 =
+    cc::CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
+                                       base::TimeTicks::FromInternalValue(99));
+  EXPECT_CALL(client, SendBeginFrame(_)).Times(0);
+  compositor()->SendBeginFramesToChildren(args3);
+  Mock::VerifyAndClearExpectations(&client);
+}
+
+}  // namespace content