Add CombinedDesktopMediaList class

chrome/browser/media/tab_desktop_media_list_unittest.cc

+// Copyright 2016 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 "chrome/browser/media/tab_desktop_media_list.h"
+
+#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/media/desktop_media_list_observer.h"
+#include "content/public/test/test_browser_thread.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/image/image.h"
+
+using testing::DoAll;
+using content::DesktopMediaID;
+
+namespace {
+
+static const int kThumbnailSize = 50;     // >=20.
+static const int kDefaultSouceCount = 2;  // >=2.

[qiangchen, 2016/01/26 20:43:10]

kDefaultSourceCount

[GeorgeZ, 2016/01/27 00:17:39]

Done.

+
+// Create a greyscale image with certain size and grayscale value.
+gfx::Image CreateGrayscaleImage(gfx::Size size, int greyscale_value) {
+  SkBitmap result;
+  result.allocN32Pixels(size.width(), size.height(), true);
+
+  result.lockPixels();
+  uint8_t* pixels_data = reinterpret_cast<uint8_t*>(result.getPixels());
+
+  // Set greyscale value for all pixels.
+  for (int y = 0; y < result.height(); ++y) {
+    for (int x = 0; x < result.width(); ++x) {
+      pixels_data[result.rowBytes() * y + x * result.bytesPerPixel()] =
+          greyscale_value;
+      pixels_data[result.rowBytes() * y + x * result.bytesPerPixel() + 1] =
+          greyscale_value;
+      pixels_data[result.rowBytes() * y + x * result.bytesPerPixel() + 2] =
+          greyscale_value;
+      pixels_data[result.rowBytes() * y + x * result.bytesPerPixel() + 3] =
+          0xff;
+    }
+  }
+
+  result.unlockPixels();
+
+  return gfx::Image::CreateFrom1xBitmap(result);
+}
+
+class MockObserver : public DesktopMediaListObserver {
+ public:
+  MOCK_METHOD2(OnSourceAdded, void(DesktopMediaList* list, int index));
+  MOCK_METHOD2(OnSourceRemoved, void(DesktopMediaList* list, int index));
+  MOCK_METHOD3(OnSourceMoved,
+               void(DesktopMediaList* list, int old_index, int new_index));
+  MOCK_METHOD2(OnSourceNameChanged, void(DesktopMediaList* list, int index));
+  MOCK_METHOD2(OnSourceThumbnailChanged,
+               void(DesktopMediaList* list, int index));
+};
+
+ACTION_P2(CheckListSize, list, expected_list_size) {
+  EXPECT_EQ(expected_list_size, list->GetSourceCount());
+}
+
+ACTION_P(QuitMessageLoop, message_loop) {
+  message_loop->task_runner()->PostTask(
+      FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
+}
+
+class TabDesktopMediaListTest : public testing::Test {
+ public:
+  TabDesktopMediaListTest()
+      : ui_thread_(content::BrowserThread::UI, &message_loop_) {}
+
+  void CreateDefaultList() {
+    list_.reset(new TabDesktopMediaList());
+    list_->SetThumbnailSize(gfx::Size(kThumbnailSize, kThumbnailSize));
+
+    // Set update period to reduce the time it takes to run tests.
+    // >0 to avoid unit test failure.
+    list_->SetUpdatePeriod(base::TimeDelta::FromMilliseconds(1));
+  }
+
+  void AddFakeSource(int index, base::string16 title, int greyscale_value) {
+    DesktopMediaID id(DesktopMediaID::TYPE_WEB_CONTENTS, 0,
+                      content::WebContentsMediaCaptureId(index + 1, index + 1));
+    fake_sources_.push_back(DesktopMediaListBase::SourceDescription(id, title));
+    fake_favicons_.push_back(
+        CreateGrayscaleImage(gfx::Size(10, 10), greyscale_value));
+  }
+
+  void RemoveFakeSource(int index) {
+    if (static_cast<size_t>(index) >= fake_sources_.size())
+      return;
+
+    fake_sources_.erase(fake_sources_.begin() + index);
+    fake_favicons_.erase(fake_favicons_.begin() + index);
+  }
+
+  void InitializeAndVerify() {
+    CreateDefaultList();
+
+    for (int i = 0; i < kDefaultSouceCount; ++i)
+      AddFakeSource(i, base::UTF8ToUTF16("Test tab"), static_cast<uint8_t>(i));
+
+    list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+    {
+      testing::InSequence dummy;
+      for (int i = 0; i < kDefaultSouceCount; ++i) {
+        EXPECT_CALL(observer_, OnSourceAdded(list_.get(), i))
+            .WillOnce(CheckListSize(list_.get(), i + 1));
+      }
+      for (int i = 0; i < kDefaultSouceCount - 1; ++i) {
+        EXPECT_CALL(observer_, OnSourceThumbnailChanged(list_.get(), i));
+      }
+      EXPECT_CALL(observer_,
+                  OnSourceThumbnailChanged(list_.get(), kDefaultSouceCount - 1))
+          .WillOnce(QuitMessageLoop(&message_loop_));
+    }
+
+    list_->StartUpdating(&observer_);
+    message_loop_.Run();
+
+    for (int i = 0; i < kDefaultSouceCount; ++i) {
+      EXPECT_EQ(list_->GetSource(i).id.type,
+                content::DesktopMediaID::TYPE_WEB_CONTENTS);
+      EXPECT_EQ(list_->GetSource(i).id.web_contents_id.render_process_id,
+                i + 1);
+      EXPECT_EQ(list_->GetSource(i).id.web_contents_id.main_render_frame_id,
+                i + 1);
+      EXPECT_EQ(list_->GetSource(i).name, base::UTF8ToUTF16("Test tab"));
+    }
+
+    testing::Mock::VerifyAndClearExpectations(&observer_);

[qiangchen, 2016/01/26 20:43:10]

Again, make this to a function of observer_.

[GeorgeZ, 2016/01/27 00:17:39]

Done.

+  }
+
+ protected:
+  std::vector<DesktopMediaListBase::SourceDescription> fake_sources_;
+  std::vector<gfx::Image> fake_favicons_;
+
+  // Must be listed before |list_|, so it's destroyed last.
+  MockObserver observer_;
+  scoped_ptr<TabDesktopMediaList> list_;
+
+  base::MessageLoop message_loop_;
+  content::TestBrowserThread ui_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(TabDesktopMediaListTest);
+};
+
+TEST_F(TabDesktopMediaListTest, AddTab) {
+  InitializeAndVerify();
+
+  int index = kDefaultSouceCount;
+  AddFakeSource(index, base::UTF8ToUTF16("Test tab"),
+                static_cast<uint8_t>(index));
+  list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+  EXPECT_CALL(observer_, OnSourceAdded(list_.get(), index))
+      .WillOnce(CheckListSize(list_.get(), kDefaultSouceCount + 1));
+  EXPECT_CALL(observer_, OnSourceThumbnailChanged(list_.get(), index))
+      .WillOnce(QuitMessageLoop(&message_loop_));
+
+  message_loop_.Run();
+
+  EXPECT_EQ(list_->GetSource(index).id.web_contents_id.render_process_id,
+            index + 1);
+  EXPECT_EQ(list_->GetSource(index).id.web_contents_id.main_render_frame_id,
+            index + 1);
+}
+
+TEST_F(TabDesktopMediaListTest, RemoveTab) {
+  InitializeAndVerify();
+
+  int index = kDefaultSouceCount - 1;
+  RemoveFakeSource(index);
+  list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+  EXPECT_CALL(observer_, OnSourceRemoved(list_.get(), index))
+      .WillOnce(DoAll(CheckListSize(list_.get(), kDefaultSouceCount - 1),
+                      QuitMessageLoop(&message_loop_)));
+
+  message_loop_.Run();
+}
+
+TEST_F(TabDesktopMediaListTest, MoveTab) {
+  InitializeAndVerify();
+
+  // Swap the two sources.
+  DCHECK_GE(kDefaultSouceCount, 2);
+  RemoveFakeSource(kDefaultSouceCount - 1);
+  RemoveFakeSource(kDefaultSouceCount - 2);
+  AddFakeSource(kDefaultSouceCount - 1, base::UTF8ToUTF16("Test tab"),
+                static_cast<uint8_t>(kDefaultSouceCount - 1));
+  AddFakeSource(kDefaultSouceCount - 2, base::UTF8ToUTF16("Test tab"),
+                static_cast<uint8_t>(kDefaultSouceCount - 2));
+  list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+  EXPECT_CALL(observer_, OnSourceMoved(list_.get(), kDefaultSouceCount - 1,
+                                       kDefaultSouceCount - 2))
+      .WillOnce(DoAll(CheckListSize(list_.get(), kDefaultSouceCount),
+                      QuitMessageLoop(&message_loop_)));
+
+  message_loop_.Run();
+}
+
+TEST_F(TabDesktopMediaListTest, UpdateTitle) {
+  InitializeAndVerify();
+
+  fake_sources_[0].name = base::UTF8ToUTF16("New test tab");
+  list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+  EXPECT_CALL(observer_, OnSourceNameChanged(list_.get(), 0))
+      .WillOnce(QuitMessageLoop(&message_loop_));
+
+  message_loop_.Run();
+
+  EXPECT_EQ(list_->GetSource(0).name, base::UTF8ToUTF16("New test tab"));
+}
+
+TEST_F(TabDesktopMediaListTest, UpdateThumbnail) {
+  InitializeAndVerify();
+
+  fake_favicons_[0] =
+      CreateGrayscaleImage(gfx::Size(kThumbnailSize, kThumbnailSize), 100);
+  list_->SetFakeSourcesForTesting(fake_sources_, fake_favicons_);
+
+  EXPECT_CALL(observer_, OnSourceThumbnailChanged(list_.get(), 0))
+      .WillOnce(QuitMessageLoop(&message_loop_));
+
+  message_loop_.Run();
+}
+
+}  // namespace