Add optional visualization file writers to VideoProcessor tests.

webrtc/test/testsupport/yuv_frame_reader_unittest.cc

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/test/testsupport/frame_reader.h"
+#include <memory>
+#include <string>
 
 #include "webrtc/api/video/i420_buffer.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
+#include "webrtc/test/testsupport/frame_reader.h"
 
 namespace webrtc {
 namespace test {
 
-const std::string kInputFileContents = "baz";
-const size_t kFrameLength = 3;
+namespace {
+const std::string kInputFileContents = "bazouk";
 
-class FrameReaderTest: public testing::Test {
+const size_t kFrameWidth = 2;
+const size_t kFrameHeight = 2;
+const size_t kFrameLength = 3 * kFrameWidth * kFrameHeight / 2;  // I420.
+}  // namespace
+
+class YuvFrameReaderTest : public testing::Test {
  protected:
-  FrameReaderTest() {}
-  virtual ~FrameReaderTest() {}
-  void SetUp() {
-    // Create a dummy input file.
+  YuvFrameReaderTest() = default;
+  ~YuvFrameReaderTest() override = default;
+
+  void SetUp() override {
     temp_filename_ = webrtc::test::TempFilename(webrtc::test::OutputPath(),
-                                                "frame_reader_unittest");
+                                                "yuv_frame_reader_unittest");
     FILE* dummy = fopen(temp_filename_.c_str(), "wb");
     fprintf(dummy, "%s", kInputFileContents.c_str());
     fclose(dummy);
 
-    frame_reader_ = new FrameReaderImpl(temp_filename_, 1, 1);
+    frame_reader_.reset(
+        new YuvFrameReaderImpl(temp_filename_, kFrameWidth, kFrameHeight));
     ASSERT_TRUE(frame_reader_->Init());
   }
-  void TearDown() {
-    delete frame_reader_;
-    // Cleanup the dummy input file.
-    remove(temp_filename_.c_str());
-  }
-  FrameReader* frame_reader_;
+
+  void TearDown() override { remove(temp_filename_.c_str()); }
+
+  std::unique_ptr<FrameReader> frame_reader_;
   std::string temp_filename_;
 };
 
-TEST_F(FrameReaderTest, InitSuccess) {
-  FrameReaderImpl frame_reader(temp_filename_, 1, 1);
-  ASSERT_TRUE(frame_reader.Init());
-  ASSERT_EQ(kFrameLength, frame_reader.FrameLength());
-  ASSERT_EQ(1, frame_reader.NumberOfFrames());
+TEST_F(YuvFrameReaderTest, InitSuccess) {}
+
+TEST_F(YuvFrameReaderTest, FrameLength) {
+  EXPECT_EQ(kFrameLength, frame_reader_->FrameLength());
 }
 
-TEST_F(FrameReaderTest, ReadFrame) {
+TEST_F(YuvFrameReaderTest, NumberOfFrames) {
+  EXPECT_EQ(1, frame_reader_->NumberOfFrames());
+}
+
+TEST_F(YuvFrameReaderTest, ReadFrame) {
   rtc::scoped_refptr<VideoFrameBuffer> buffer;
   buffer = frame_reader_->ReadFrame();
   ASSERT_TRUE(buffer);
-  ASSERT_EQ(kInputFileContents[0], buffer->DataY()[0]);
-  ASSERT_EQ(kInputFileContents[1], buffer->DataU()[0]);
-  ASSERT_EQ(kInputFileContents[2], buffer->DataV()[0]);
-  ASSERT_FALSE(frame_reader_->ReadFrame());  // End of file
+  // Expect I420 packed as YUV.
+  EXPECT_EQ(kInputFileContents[0], buffer->DataY()[0]);
+  EXPECT_EQ(kInputFileContents[1], buffer->DataY()[1]);
+  EXPECT_EQ(kInputFileContents[2], buffer->DataY()[2]);
+  EXPECT_EQ(kInputFileContents[3], buffer->DataY()[3]);
+  EXPECT_EQ(kInputFileContents[4], buffer->DataU()[0]);
+  EXPECT_EQ(kInputFileContents[5], buffer->DataV()[0]);
+  EXPECT_FALSE(frame_reader_->ReadFrame());  // End of file.
 }
 
-TEST_F(FrameReaderTest, ReadFrameUninitialized) {
-  FrameReaderImpl file_reader(temp_filename_, 1, 1);
-  ASSERT_FALSE(file_reader.ReadFrame());
+TEST_F(YuvFrameReaderTest, ReadFrameUninitialized) {
+  YuvFrameReaderImpl file_reader(temp_filename_, kFrameWidth, kFrameHeight);
+  EXPECT_FALSE(file_reader.ReadFrame());
 }
 
 }  // namespace test
 }  // namespace webrtc