media: Add a unittest for MediaCodecVideoDecoder

BUG=660942
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2561653002
Cr-Commit-Position: refs/heads/master@{#437663}

media/gpu/android/media_codec_video_decoder_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 "base/bind.h"
+#include "base/run_loop.h"
+#include "media/base/android/media_codec_util.h"
+#include "media/base/test_helpers.h"
+#include "media/gpu/android/media_codec_video_decoder.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#define SKIP_IF_MEDIA_CODEC_IS_BLACKLISTED()                                 \
+  do {                                                                       \
+    if (!MediaCodecUtil::IsMediaCodecAvailable()) {                          \
+      DVLOG(0) << "Skipping test: MediaCodec is blacklisted on this device"; \
+      return;                                                                \
+    }                                                                        \
+  } while (0)
+
+namespace media {
+namespace {
+
+void InitCb(bool* result_out, bool result) {
+  *result_out = result;
+}
+
+void OutputCb(const scoped_refptr<VideoFrame>& frame) {}
+
+}  // namespace
+
+class MediaCodecVideoDecoderTest : public testing::Test {
+ public:
+  ~MediaCodecVideoDecoderTest() override {}
+
+  bool Initialize(const VideoDecoderConfig& config) {
+    bool result = false;
+    mcvd_.Initialize(config, false, nullptr, base::Bind(&InitCb, &result),
+                     base::Bind(&OutputCb));
+    base::RunLoop().RunUntilIdle();
+    return result;
+  }
+
+ private:
+  MediaCodecVideoDecoder mcvd_;
+  base::MessageLoop message_loop_;
+};
+
+TEST_F(MediaCodecVideoDecoderTest, DestructWithoutInit) {
+  // Do nothing.
+}
+
+TEST_F(MediaCodecVideoDecoderTest, UnknownCodecIsRejected) {
+  SKIP_IF_MEDIA_CODEC_IS_BLACKLISTED();
+  ASSERT_FALSE(Initialize(TestVideoConfig::Invalid()));
+}
+
+TEST_F(MediaCodecVideoDecoderTest, H264IsSupported) {
+  SKIP_IF_MEDIA_CODEC_IS_BLACKLISTED();
+  // H264 is always supported by MCVD.
+  ASSERT_TRUE(Initialize(TestVideoConfig::NormalH264()));
+}
+
+TEST_F(MediaCodecVideoDecoderTest, SmallVp8IsRejected) {
+  SKIP_IF_MEDIA_CODEC_IS_BLACKLISTED();
+  ASSERT_TRUE(Initialize(TestVideoConfig::NormalH264()));
+}
+
+}  // namespace media