Add BeginFrameObserverProxy

content/browser/renderer_host/begin_frame_manager_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 "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_manager.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/compositor/compositor.h"
+#include "ui/compositor/test/context_factories_for_test.h"
+
+namespace content {
+namespace {
+
+class TestBeginFrameManagerClient : public BeginFrameManagerClient {
+ public:
+  TestBeginFrameManagerClient() : begin_frame_sent_(false) {}
+  ~TestBeginFrameManagerClient() {}
+
+  // BeginFrameManagerClient:
+  void SendBeginFrame(const cc::BeginFrameArgs& args) override {
+    last_begin_frame_args_ = args;
+    begin_frame_sent_ = true;
+  }
+
+  bool begin_frame_sent() { return begin_frame_sent_; }
+  cc::BeginFrameArgs last_begin_frame_args() { return last_begin_frame_args_; }
+
+ private:
+  bool begin_frame_sent_;
+  cc::BeginFrameArgs last_begin_frame_args_;
+};
+
+class BeginFrameManagerTest : public testing::Test {
+ public:
+  BeginFrameManagerTest() {}
+  ~BeginFrameManagerTest() 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(BeginFrameManagerTest, BeginFrameScheduling) {
+  TestBeginFrameManagerClient client;
+  BeginFrameManager begin_frame_manager(&client);
+  begin_frame_manager.SetCompositor(compositor());

[danakj, 2015/03/17 18:56:45]

Shall we also test setting the compositor to null and back and verify that it
adds/removes itself as an observer of the compositor?

[brianderson, 2015/03/17 22:29:32]

+1

[simonhong, 2015/03/19 15:48:46]

Done.

+  begin_frame_manager.OnSetNeedsBeginFrames(true);
+  EXPECT_FALSE(client.begin_frame_sent());
+
+  cc::BeginFrameArgs args =
+    cc::CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
+                                       base::TimeTicks::FromInternalValue(33));
+  compositor()->SendBeginFramesToChildren(args);
+  EXPECT_TRUE(client.begin_frame_sent());
+  EXPECT_EQ(args.frame_time, client.last_begin_frame_args().frame_time);
+
+  begin_frame_manager.ResetCompositor();
+}
+
+}  // namespace content