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// Copyright (c) 2010 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/media_filter_collection.h"
#include "media/base/mock_filters.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
class MediaFilterCollectionTest : public ::testing::Test {
public:
MediaFilterCollectionTest() {}
virtual ~MediaFilterCollectionTest() {}
protected:
MediaFilterCollection collection_;
MockFilterCollection mock_filters_;
DISALLOW_COPY_AND_ASSIGN(MediaFilterCollectionTest);
};
TEST_F(MediaFilterCollectionTest, TestIsEmptyAndClear) {
EXPECT_TRUE(collection_.IsEmpty());
collection_.AddFilter(mock_filters_.data_source());
EXPECT_FALSE(collection_.IsEmpty());
collection_.Clear();
EXPECT_TRUE(collection_.IsEmpty());
}
TEST_F(MediaFilterCollectionTest, SelectFilter) {
scoped_refptr<AudioDecoder> audio_decoder;
scoped_refptr<DataSource> data_source;
collection_.AddFilter(mock_filters_.data_source());
EXPECT_FALSE(collection_.IsEmpty());
// Verify that the data source will not be returned if we
// ask for a different type.
collection_.SelectFilter(&audio_decoder);
EXPECT_FALSE(audio_decoder);
EXPECT_FALSE(collection_.IsEmpty());
// Verify that we can actually retrieve the data source
// and that it is removed from the collection.
collection_.SelectFilter(&data_source);
EXPECT_TRUE(data_source);
EXPECT_TRUE(collection_.IsEmpty());
// Add a data source and audio decoder.
collection_.AddFilter(mock_filters_.data_source());
collection_.AddFilter(mock_filters_.audio_decoder());
// Verify that we can select the audio decoder.
collection_.SelectFilter(&audio_decoder);
EXPECT_TRUE(audio_decoder);
EXPECT_FALSE(collection_.IsEmpty());
// Verify that we can't select it again since only one has been added.
collection_.SelectFilter(&audio_decoder);
EXPECT_FALSE(audio_decoder);
// Verify that we can select the data source and that doing so will
// empty the collection again.
collection_.SelectFilter(&data_source);
EXPECT_TRUE(collection_.IsEmpty());
}
TEST_F(MediaFilterCollectionTest, MultipleFiltersOfSameType) {
scoped_refptr<DataSource> data_source_a(new MockDataSource());
scoped_refptr<DataSource> data_source_b(new MockDataSource());
scoped_refptr<DataSource> data_source;
collection_.AddFilter(data_source_a.get());
collection_.AddFilter(data_source_b.get());
// Verify that first SelectFilter() returns data_source_a.
collection_.SelectFilter(&data_source);
EXPECT_TRUE(data_source);
EXPECT_EQ(data_source, data_source_a);
EXPECT_FALSE(collection_.IsEmpty());
// Verify that second SelectFilter() returns data_source_b.
collection_.SelectFilter(&data_source);
EXPECT_TRUE(data_source);
EXPECT_EQ(data_source, data_source_b);
EXPECT_TRUE(collection_.IsEmpty());
// Verify that third SelectFilter returns nothing.
collection_.SelectFilter(&data_source);
EXPECT_FALSE(data_source);
}
} // namespace media
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