Revert r180578, r180591, and r180604 from 1410 branch.

media/base/filter_collection_unittest.cc

+// Copyright (c) 2011 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 "media/base/filter_collection.h"
+#include "media/base/mock_filters.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+class FilterCollectionTest : public ::testing::Test {
+ public:
+  FilterCollectionTest() {}
+  virtual ~FilterCollectionTest() {}
+
+ protected:
+  FilterCollection collection_;
+
+  DISALLOW_COPY_AND_ASSIGN(FilterCollectionTest);
+};
+
+TEST_F(FilterCollectionTest, SelectXXXMethods) {
+  scoped_refptr<AudioRenderer> audio_renderer;
+
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_FALSE(audio_renderer);
+
+  // Add an audio decoder.
+  collection_.AddAudioRenderer(new MockAudioRenderer());
+
+  // Verify that we can select the audio decoder.
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_TRUE(audio_renderer);
+
+  // Verify that we can't select it again since only one has been added.
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_FALSE(audio_renderer);
+}
+
+TEST_F(FilterCollectionTest, MultipleFiltersOfSameType) {
+  scoped_refptr<AudioRenderer> audio_renderer_a(new MockAudioRenderer());
+  scoped_refptr<AudioRenderer> audio_renderer_b(new MockAudioRenderer());
+
+  scoped_refptr<AudioRenderer> audio_renderer;
+
+  collection_.AddAudioRenderer(audio_renderer_a.get());
+  collection_.AddAudioRenderer(audio_renderer_b.get());
+
+  // Verify that first SelectAudioRenderer() returns audio_renderer_a.
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_TRUE(audio_renderer);
+  EXPECT_EQ(audio_renderer, audio_renderer_a);
+
+  // Verify that second SelectAudioRenderer() returns audio_renderer_b.
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_TRUE(audio_renderer);
+  EXPECT_EQ(audio_renderer, audio_renderer_b);
+
+  // Verify that third SelectAudioRenderer() returns nothing.
+  collection_.SelectAudioRenderer(&audio_renderer);
+  EXPECT_FALSE(audio_renderer);
+}
+
+}  // namespace media