modules/audio_processing/transient/file_utils_unittest.cc - src/webrtc - Git at Google

 /*
  *  Copyright (c) 2013 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/modules/audio_processing/transient/file_utils.h"

 #include <string.h>
 #include <string>

 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/system_wrappers/interface/file_wrapper.h"
 #include "webrtc/system_wrappers/interface/scoped_ptr.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/typedefs.h"

 namespace webrtc {

 static const uint8_t kPiBytesf[4] = {0xDB, 0x0F, 0x49, 0x40};
 static const uint8_t kEBytesf[4] = {0x54, 0xF8, 0x2D, 0x40};
 static const uint8_t kAvogadroBytesf[4] = {0x2F, 0x0C, 0xFF, 0x66};

 static const uint8_t kPiBytes[8] =
     {0x18, 0x2D, 0x44, 0x54, 0xFB, 0x21, 0x09, 0x40};
 static const uint8_t kEBytes[8] =
     {0x69, 0x57, 0x14, 0x8B, 0x0A, 0xBF, 0x05, 0x40};
 static const uint8_t kAvogadroBytes[8] =
     {0xF4, 0xBC, 0xA8, 0xDF, 0x85, 0xE1, 0xDF, 0x44};

 static const double kPi = 3.14159265358979323846;
 static const double kE = 2.71828182845904523536;
 static const double kAvogadro = 602214100000000000000000.0;

 class TransientFileUtilsTest: public ::testing::Test {
  protected:
   TransientFileUtilsTest()
       : kTestFileName(
             test::ResourcePath("audio_processing/transient/double-utils",
                                "dat")),
         kTestFileNamef(
             test::ResourcePath("audio_processing/transient/float-utils",
                                "dat")) {}
   // This file (used in some tests) contains binary data. The data correspond to
   // the double representation of the constants: Pi, E, and the Avogadro's
   // Number;
   // appended in that order.
   const std::string kTestFileName;

   // This file (used in some tests) contains binary data. The data correspond to
   // the float representation of the constants: Pi, E, and the Avogadro's
   // Number;
   // appended in that order.
   const std::string kTestFileNamef;
 };

 TEST_F(TransientFileUtilsTest, ConvertByteArrayToFloat) {
   float value = 0.0;

   EXPECT_EQ(0, ConvertByteArrayToFloat(kPiBytesf, &value));
   EXPECT_FLOAT_EQ(kPi, value);

   EXPECT_EQ(0, ConvertByteArrayToFloat(kEBytesf, &value));
   EXPECT_FLOAT_EQ(kE, value);

   EXPECT_EQ(0, ConvertByteArrayToFloat(kAvogadroBytesf, &value));
   EXPECT_FLOAT_EQ(kAvogadro, value);
 }

 TEST_F(TransientFileUtilsTest, ConvertByteArrayToDouble) {
   double value = 0.0;

   EXPECT_EQ(0, ConvertByteArrayToDouble(kPiBytes, &value));
   EXPECT_DOUBLE_EQ(kPi, value);

   EXPECT_EQ(0, ConvertByteArrayToDouble(kEBytes, &value));
   EXPECT_DOUBLE_EQ(kE, value);

   EXPECT_EQ(0, ConvertByteArrayToDouble(kAvogadroBytes, &value));
   EXPECT_DOUBLE_EQ(kAvogadro, value);
 }

 TEST_F(TransientFileUtilsTest, ConvertFloatToByteArray) {
   scoped_ptr<uint8_t[]> bytes(new uint8_t[4]);

   EXPECT_EQ(0, ConvertFloatToByteArray(kPi, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kPiBytesf, 4));

   EXPECT_EQ(0, ConvertFloatToByteArray(kE, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kEBytesf, 4));

   EXPECT_EQ(0, ConvertFloatToByteArray(kAvogadro, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kAvogadroBytesf, 4));
 }

 TEST_F(TransientFileUtilsTest, ConvertDoubleToByteArray) {
   scoped_ptr<uint8_t[]> bytes(new uint8_t[8]);

   EXPECT_EQ(0, ConvertDoubleToByteArray(kPi, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kPiBytes, 8));

   EXPECT_EQ(0, ConvertDoubleToByteArray(kE, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kEBytes, 8));

   EXPECT_EQ(0, ConvertDoubleToByteArray(kAvogadro, bytes.get()));
   EXPECT_EQ(0, memcmp(bytes.get(), kAvogadroBytes, 8));
 }

 TEST_F(TransientFileUtilsTest, ReadInt16BufferFromFile) {
   std::string test_filename = kTestFileName;

   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileName.c_str();

   const size_t kBufferLength = 12;
   scoped_ptr<int16_t[]> buffer(new int16_t[kBufferLength]);

   EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
                                                    kBufferLength,
                                                    buffer.get()));
   EXPECT_EQ(22377, buffer[4]);
   EXPECT_EQ(16389, buffer[7]);
   EXPECT_EQ(17631, buffer[kBufferLength - 1]);

   file->Rewind();

   // The next test is for checking the case where there are not as much data as
   // needed in the file, but reads to the end, and it returns the number of
   // int16s read.
   const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
   buffer.reset(new int16_t[kBufferLenghtLargerThanFile]);
   EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
                                                    kBufferLenghtLargerThanFile,
                                                    buffer.get()));
   EXPECT_EQ(11544, buffer[0]);
   EXPECT_EQ(22377, buffer[4]);
   EXPECT_EQ(16389, buffer[7]);
   EXPECT_EQ(17631, buffer[kBufferLength - 1]);
 }

 TEST_F(TransientFileUtilsTest, ReadInt16FromFileToFloatBuffer) {
   std::string test_filename = kTestFileName;

   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileName.c_str();

   const size_t kBufferLength = 12;
   scoped_ptr<float[]> buffer(new float[kBufferLength]);

   EXPECT_EQ(kBufferLength, ReadInt16FromFileToFloatBuffer(file.get(),
                                                           kBufferLength,
                                                           buffer.get()));

   EXPECT_DOUBLE_EQ(11544, buffer[0]);
   EXPECT_DOUBLE_EQ(22377, buffer[4]);
   EXPECT_DOUBLE_EQ(16389, buffer[7]);
   EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);

   file->Rewind();

   // The next test is for checking the case where there are not as much data as
   // needed in the file, but reads to the end, and it returns the number of
   // int16s read.
   const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
   buffer.reset(new float[kBufferLenghtLargerThanFile]);
   EXPECT_EQ(kBufferLength,
             ReadInt16FromFileToFloatBuffer(file.get(),
                                            kBufferLenghtLargerThanFile,
                                            buffer.get()));
   EXPECT_DOUBLE_EQ(11544, buffer[0]);
   EXPECT_DOUBLE_EQ(22377, buffer[4]);
   EXPECT_DOUBLE_EQ(16389, buffer[7]);
   EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);
 }

 TEST_F(TransientFileUtilsTest, ReadInt16FromFileToDoubleBuffer) {
   std::string test_filename = kTestFileName;

   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileName.c_str();

   const size_t kBufferLength = 12;
   scoped_ptr<double[]> buffer(new double[kBufferLength]);

   EXPECT_EQ(kBufferLength, ReadInt16FromFileToDoubleBuffer(file.get(),
                                                            kBufferLength,
                                                            buffer.get()));
   EXPECT_DOUBLE_EQ(11544, buffer[0]);
   EXPECT_DOUBLE_EQ(22377, buffer[4]);
   EXPECT_DOUBLE_EQ(16389, buffer[7]);
   EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);

   file->Rewind();

   // The next test is for checking the case where there are not as much data as
   // needed in the file, but reads to the end, and it returns the number of
   // int16s read.
   const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
   buffer.reset(new double[kBufferLenghtLargerThanFile]);
   EXPECT_EQ(kBufferLength,
             ReadInt16FromFileToDoubleBuffer(file.get(),
                                             kBufferLenghtLargerThanFile,
                                             buffer.get()));
   EXPECT_DOUBLE_EQ(11544, buffer[0]);
   EXPECT_DOUBLE_EQ(22377, buffer[4]);
   EXPECT_DOUBLE_EQ(16389, buffer[7]);
   EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);
 }

 TEST_F(TransientFileUtilsTest, ReadFloatBufferFromFile) {
   std::string test_filename = kTestFileNamef;

   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileNamef.c_str();

   const size_t kBufferLength = 3;
   scoped_ptr<float[]> buffer(new float[kBufferLength]);


   EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
                                                    kBufferLength,
                                                    buffer.get()));
   EXPECT_FLOAT_EQ(kPi, buffer[0]);
   EXPECT_FLOAT_EQ(kE, buffer[1]);
   EXPECT_FLOAT_EQ(kAvogadro, buffer[2]);

   file->Rewind();

   // The next test is for checking the case where there are not as much data as
   // needed in the file, but reads to the end, and it returns the number of
   // doubles read.
   const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
   buffer.reset(new float[kBufferLenghtLargerThanFile]);
   EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
                                                    kBufferLenghtLargerThanFile,
                                                    buffer.get()));
   EXPECT_FLOAT_EQ(kPi, buffer[0]);
   EXPECT_FLOAT_EQ(kE, buffer[1]);
   EXPECT_FLOAT_EQ(kAvogadro, buffer[2]);
 }

 TEST_F(TransientFileUtilsTest, ReadDoubleBufferFromFile) {
   std::string test_filename = kTestFileName;

   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileName.c_str();

   const size_t kBufferLength = 3;
   scoped_ptr<double[]> buffer(new double[kBufferLength]);


   EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
                                                     kBufferLength,
                                                     buffer.get()));
   EXPECT_DOUBLE_EQ(kPi, buffer[0]);
   EXPECT_DOUBLE_EQ(kE, buffer[1]);
   EXPECT_DOUBLE_EQ(kAvogadro, buffer[2]);

   file->Rewind();

   // The next test is for checking the case where there are not as much data as
   // needed in the file, but reads to the end, and it returns the number of
   // doubles read.
   const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
   buffer.reset(new double[kBufferLenghtLargerThanFile]);
   EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
                                                     kBufferLenghtLargerThanFile,
                                                     buffer.get()));
   EXPECT_DOUBLE_EQ(kPi, buffer[0]);
   EXPECT_DOUBLE_EQ(kE, buffer[1]);
   EXPECT_DOUBLE_EQ(kAvogadro, buffer[2]);
 }

 TEST_F(TransientFileUtilsTest, WriteInt16BufferToFile) {
   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   std::string kOutFileName = test::TempFilename(test::OutputPath(),
                                                 "utils_test");

   file->OpenFile(kOutFileName.c_str(),
                  false,   // Write mode.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   const size_t kBufferLength = 3;
   scoped_ptr<int16_t[]> written_buffer(new int16_t[kBufferLength]);
   scoped_ptr<int16_t[]> read_buffer(new int16_t[kBufferLength]);

   written_buffer[0] = 1;
   written_buffer[1] = 2;
   written_buffer[2] = 3;

   EXPECT_EQ(kBufferLength, WriteInt16BufferToFile(file.get(),
                                                   kBufferLength,
                                                   written_buffer.get()));

   file->CloseFile();

   file->OpenFile(kOutFileName.c_str(),
                  true,    // Read only.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
                                                    kBufferLength,
                                                    read_buffer.get()));
   EXPECT_EQ(0, memcmp(written_buffer.get(),
                       read_buffer.get(),
                       kBufferLength * sizeof(written_buffer[0])));
 }

 TEST_F(TransientFileUtilsTest, WriteFloatBufferToFile) {
   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   std::string kOutFileName = test::TempFilename(test::OutputPath(),
                                                 "utils_test");

   file->OpenFile(kOutFileName.c_str(),
                  false,   // Write mode.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   const size_t kBufferLength = 3;
   scoped_ptr<float[]> written_buffer(new float[kBufferLength]);
   scoped_ptr<float[]> read_buffer(new float[kBufferLength]);

   written_buffer[0] = kPi;
   written_buffer[1] = kE;
   written_buffer[2] = kAvogadro;

   EXPECT_EQ(kBufferLength, WriteFloatBufferToFile(file.get(),
                                                   kBufferLength,
                                                   written_buffer.get()));

   file->CloseFile();

   file->OpenFile(kOutFileName.c_str(),
                  true,    // Read only.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
                                                    kBufferLength,
                                                    read_buffer.get()));
   EXPECT_EQ(0, memcmp(written_buffer.get(),
                       read_buffer.get(),
                       kBufferLength * sizeof(written_buffer[0])));
 }

 TEST_F(TransientFileUtilsTest, WriteDoubleBufferToFile) {
   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   std::string kOutFileName = test::TempFilename(test::OutputPath(),
                                                 "utils_test");

   file->OpenFile(kOutFileName.c_str(),
                  false,   // Write mode.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   const size_t kBufferLength = 3;
   scoped_ptr<double[]> written_buffer(new double[kBufferLength]);
   scoped_ptr<double[]> read_buffer(new double[kBufferLength]);

   written_buffer[0] = kPi;
   written_buffer[1] = kE;
   written_buffer[2] = kAvogadro;

   EXPECT_EQ(kBufferLength, WriteDoubleBufferToFile(file.get(),
                                                    kBufferLength,
                                                    written_buffer.get()));

   file->CloseFile();

   file->OpenFile(kOutFileName.c_str(),
                  true,    // Read only.
                  false,   // No loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kOutFileName.c_str();

   EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
                                                     kBufferLength,
                                                     read_buffer.get()));
   EXPECT_EQ(0, memcmp(written_buffer.get(),
                       read_buffer.get(),
                       kBufferLength * sizeof(written_buffer[0])));
 }

 TEST_F(TransientFileUtilsTest, ExpectedErrorReturnValues) {
   std::string test_filename = kTestFileName;

   double value;
   scoped_ptr<int16_t[]> int16_buffer(new int16_t[1]);
   scoped_ptr<double[]> double_buffer(new double[1]);
   scoped_ptr<FileWrapper> file(FileWrapper::Create());

   EXPECT_EQ(-1, ConvertByteArrayToDouble(NULL, &value));
   EXPECT_EQ(-1, ConvertByteArrayToDouble(kPiBytes, NULL));

   EXPECT_EQ(-1, ConvertDoubleToByteArray(kPi, NULL));

   // Tests with file not opened.
   EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 1, int16_buffer.get()));
   EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(),
                                                 1,
                                                 double_buffer.get()));
   EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 1, double_buffer.get()));
   EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 1, int16_buffer.get()));
   EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 1, double_buffer.get()));

   file->OpenFile(test_filename.c_str(),
                  true,    // Read only.
                  true,    // Loop.
                  false);  // No text.
   ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
       << kTestFileName.c_str();

   EXPECT_EQ(0u, ReadInt16BufferFromFile(NULL, 1, int16_buffer.get()));
   EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 1, NULL));
   EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 0, int16_buffer.get()));

   EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(NULL, 1, double_buffer.get()));
   EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(), 1, NULL));
   EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(),
                                                 0,
                                                 double_buffer.get()));

   EXPECT_EQ(0u, ReadDoubleBufferFromFile(NULL, 1, double_buffer.get()));
   EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 1, NULL));
   EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 0, double_buffer.get()));

   EXPECT_EQ(0u, WriteInt16BufferToFile(NULL, 1, int16_buffer.get()));
   EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 1, NULL));
   EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 0, int16_buffer.get()));

   EXPECT_EQ(0u, WriteDoubleBufferToFile(NULL, 1, double_buffer.get()));
   EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 1, NULL));
   EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 0, double_buffer.get()));
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2013 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/modules/audio_processing/transient/file_utils.h"

	#include <string.h>
	#include <string>

	#include "testing/gtest/include/gtest/gtest.h"
	#include "webrtc/system_wrappers/interface/file_wrapper.h"
	#include "webrtc/system_wrappers/interface/scoped_ptr.h"
	#include "webrtc/test/testsupport/fileutils.h"
	#include "webrtc/typedefs.h"

	namespace webrtc {

	static const uint8_t kPiBytesf[4] = {0xDB, 0x0F, 0x49, 0x40};
	static const uint8_t kEBytesf[4] = {0x54, 0xF8, 0x2D, 0x40};
	static const uint8_t kAvogadroBytesf[4] = {0x2F, 0x0C, 0xFF, 0x66};

	static const uint8_t kPiBytes[8] =
	{0x18, 0x2D, 0x44, 0x54, 0xFB, 0x21, 0x09, 0x40};
	static const uint8_t kEBytes[8] =
	{0x69, 0x57, 0x14, 0x8B, 0x0A, 0xBF, 0x05, 0x40};
	static const uint8_t kAvogadroBytes[8] =
	{0xF4, 0xBC, 0xA8, 0xDF, 0x85, 0xE1, 0xDF, 0x44};

	static const double kPi = 3.14159265358979323846;
	static const double kE = 2.71828182845904523536;
	static const double kAvogadro = 602214100000000000000000.0;

	class TransientFileUtilsTest: public ::testing::Test {
	protected:
	TransientFileUtilsTest()
	: kTestFileName(
	test::ResourcePath("audio_processing/transient/double-utils",
	"dat")),
	kTestFileNamef(
	test::ResourcePath("audio_processing/transient/float-utils",
	"dat")) {}
	// This file (used in some tests) contains binary data. The data correspond to
	// the double representation of the constants: Pi, E, and the Avogadro's
	// Number;
	// appended in that order.
	const std::string kTestFileName;

	// This file (used in some tests) contains binary data. The data correspond to
	// the float representation of the constants: Pi, E, and the Avogadro's
	// Number;
	// appended in that order.
	const std::string kTestFileNamef;
	};

	TEST_F(TransientFileUtilsTest, ConvertByteArrayToFloat) {
	float value = 0.0;

	EXPECT_EQ(0, ConvertByteArrayToFloat(kPiBytesf, &value));
	EXPECT_FLOAT_EQ(kPi, value);

	EXPECT_EQ(0, ConvertByteArrayToFloat(kEBytesf, &value));
	EXPECT_FLOAT_EQ(kE, value);

	EXPECT_EQ(0, ConvertByteArrayToFloat(kAvogadroBytesf, &value));
	EXPECT_FLOAT_EQ(kAvogadro, value);
	}

	TEST_F(TransientFileUtilsTest, ConvertByteArrayToDouble) {
	double value = 0.0;

	EXPECT_EQ(0, ConvertByteArrayToDouble(kPiBytes, &value));
	EXPECT_DOUBLE_EQ(kPi, value);

	EXPECT_EQ(0, ConvertByteArrayToDouble(kEBytes, &value));
	EXPECT_DOUBLE_EQ(kE, value);

	EXPECT_EQ(0, ConvertByteArrayToDouble(kAvogadroBytes, &value));
	EXPECT_DOUBLE_EQ(kAvogadro, value);
	}

	TEST_F(TransientFileUtilsTest, ConvertFloatToByteArray) {
	scoped_ptr<uint8_t[]> bytes(new uint8_t[4]);

	EXPECT_EQ(0, ConvertFloatToByteArray(kPi, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kPiBytesf, 4));

	EXPECT_EQ(0, ConvertFloatToByteArray(kE, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kEBytesf, 4));

	EXPECT_EQ(0, ConvertFloatToByteArray(kAvogadro, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kAvogadroBytesf, 4));
	}

	TEST_F(TransientFileUtilsTest, ConvertDoubleToByteArray) {
	scoped_ptr<uint8_t[]> bytes(new uint8_t[8]);

	EXPECT_EQ(0, ConvertDoubleToByteArray(kPi, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kPiBytes, 8));

	EXPECT_EQ(0, ConvertDoubleToByteArray(kE, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kEBytes, 8));

	EXPECT_EQ(0, ConvertDoubleToByteArray(kAvogadro, bytes.get()));
	EXPECT_EQ(0, memcmp(bytes.get(), kAvogadroBytes, 8));
	}

	TEST_F(TransientFileUtilsTest, ReadInt16BufferFromFile) {
	std::string test_filename = kTestFileName;

	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileName.c_str();

	const size_t kBufferLength = 12;
	scoped_ptr<int16_t[]> buffer(new int16_t[kBufferLength]);

	EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
	kBufferLength,
	buffer.get()));
	EXPECT_EQ(22377, buffer[4]);
	EXPECT_EQ(16389, buffer[7]);
	EXPECT_EQ(17631, buffer[kBufferLength - 1]);

	file->Rewind();

	// The next test is for checking the case where there are not as much data as
	// needed in the file, but reads to the end, and it returns the number of
	// int16s read.
	const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
	buffer.reset(new int16_t[kBufferLenghtLargerThanFile]);
	EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
	kBufferLenghtLargerThanFile,
	buffer.get()));
	EXPECT_EQ(11544, buffer[0]);
	EXPECT_EQ(22377, buffer[4]);
	EXPECT_EQ(16389, buffer[7]);
	EXPECT_EQ(17631, buffer[kBufferLength - 1]);
	}

	TEST_F(TransientFileUtilsTest, ReadInt16FromFileToFloatBuffer) {
	std::string test_filename = kTestFileName;

	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileName.c_str();

	const size_t kBufferLength = 12;
	scoped_ptr<float[]> buffer(new float[kBufferLength]);

	EXPECT_EQ(kBufferLength, ReadInt16FromFileToFloatBuffer(file.get(),
	kBufferLength,
	buffer.get()));

	EXPECT_DOUBLE_EQ(11544, buffer[0]);
	EXPECT_DOUBLE_EQ(22377, buffer[4]);
	EXPECT_DOUBLE_EQ(16389, buffer[7]);
	EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);

	file->Rewind();

	// The next test is for checking the case where there are not as much data as
	// needed in the file, but reads to the end, and it returns the number of
	// int16s read.
	const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
	buffer.reset(new float[kBufferLenghtLargerThanFile]);
	EXPECT_EQ(kBufferLength,
	ReadInt16FromFileToFloatBuffer(file.get(),
	kBufferLenghtLargerThanFile,
	buffer.get()));
	EXPECT_DOUBLE_EQ(11544, buffer[0]);
	EXPECT_DOUBLE_EQ(22377, buffer[4]);
	EXPECT_DOUBLE_EQ(16389, buffer[7]);
	EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);
	}

	TEST_F(TransientFileUtilsTest, ReadInt16FromFileToDoubleBuffer) {
	std::string test_filename = kTestFileName;

	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileName.c_str();

	const size_t kBufferLength = 12;
	scoped_ptr<double[]> buffer(new double[kBufferLength]);

	EXPECT_EQ(kBufferLength, ReadInt16FromFileToDoubleBuffer(file.get(),
	kBufferLength,
	buffer.get()));
	EXPECT_DOUBLE_EQ(11544, buffer[0]);
	EXPECT_DOUBLE_EQ(22377, buffer[4]);
	EXPECT_DOUBLE_EQ(16389, buffer[7]);
	EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);

	file->Rewind();

	// The next test is for checking the case where there are not as much data as
	// needed in the file, but reads to the end, and it returns the number of
	// int16s read.
	const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
	buffer.reset(new double[kBufferLenghtLargerThanFile]);
	EXPECT_EQ(kBufferLength,
	ReadInt16FromFileToDoubleBuffer(file.get(),
	kBufferLenghtLargerThanFile,
	buffer.get()));
	EXPECT_DOUBLE_EQ(11544, buffer[0]);
	EXPECT_DOUBLE_EQ(22377, buffer[4]);
	EXPECT_DOUBLE_EQ(16389, buffer[7]);
	EXPECT_DOUBLE_EQ(17631, buffer[kBufferLength - 1]);
	}

	TEST_F(TransientFileUtilsTest, ReadFloatBufferFromFile) {
	std::string test_filename = kTestFileNamef;

	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileNamef.c_str();

	const size_t kBufferLength = 3;
	scoped_ptr<float[]> buffer(new float[kBufferLength]);


	EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
	kBufferLength,
	buffer.get()));
	EXPECT_FLOAT_EQ(kPi, buffer[0]);
	EXPECT_FLOAT_EQ(kE, buffer[1]);
	EXPECT_FLOAT_EQ(kAvogadro, buffer[2]);

	file->Rewind();

	// The next test is for checking the case where there are not as much data as
	// needed in the file, but reads to the end, and it returns the number of
	// doubles read.
	const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
	buffer.reset(new float[kBufferLenghtLargerThanFile]);
	EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
	kBufferLenghtLargerThanFile,
	buffer.get()));
	EXPECT_FLOAT_EQ(kPi, buffer[0]);
	EXPECT_FLOAT_EQ(kE, buffer[1]);
	EXPECT_FLOAT_EQ(kAvogadro, buffer[2]);
	}

	TEST_F(TransientFileUtilsTest, ReadDoubleBufferFromFile) {
	std::string test_filename = kTestFileName;

	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileName.c_str();

	const size_t kBufferLength = 3;
	scoped_ptr<double[]> buffer(new double[kBufferLength]);


	EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
	kBufferLength,
	buffer.get()));
	EXPECT_DOUBLE_EQ(kPi, buffer[0]);
	EXPECT_DOUBLE_EQ(kE, buffer[1]);
	EXPECT_DOUBLE_EQ(kAvogadro, buffer[2]);

	file->Rewind();

	// The next test is for checking the case where there are not as much data as
	// needed in the file, but reads to the end, and it returns the number of
	// doubles read.
	const size_t kBufferLenghtLargerThanFile = kBufferLength * 2;
	buffer.reset(new double[kBufferLenghtLargerThanFile]);
	EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
	kBufferLenghtLargerThanFile,
	buffer.get()));
	EXPECT_DOUBLE_EQ(kPi, buffer[0]);
	EXPECT_DOUBLE_EQ(kE, buffer[1]);
	EXPECT_DOUBLE_EQ(kAvogadro, buffer[2]);
	}

	TEST_F(TransientFileUtilsTest, WriteInt16BufferToFile) {
	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	std::string kOutFileName = test::TempFilename(test::OutputPath(),
	"utils_test");

	file->OpenFile(kOutFileName.c_str(),
	false, // Write mode.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	const size_t kBufferLength = 3;
	scoped_ptr<int16_t[]> written_buffer(new int16_t[kBufferLength]);
	scoped_ptr<int16_t[]> read_buffer(new int16_t[kBufferLength]);

	written_buffer[0] = 1;
	written_buffer[1] = 2;
	written_buffer[2] = 3;

	EXPECT_EQ(kBufferLength, WriteInt16BufferToFile(file.get(),
	kBufferLength,
	written_buffer.get()));

	file->CloseFile();

	file->OpenFile(kOutFileName.c_str(),
	true, // Read only.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	EXPECT_EQ(kBufferLength, ReadInt16BufferFromFile(file.get(),
	kBufferLength,
	read_buffer.get()));
	EXPECT_EQ(0, memcmp(written_buffer.get(),
	read_buffer.get(),
	kBufferLength * sizeof(written_buffer[0])));
	}

	TEST_F(TransientFileUtilsTest, WriteFloatBufferToFile) {
	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	std::string kOutFileName = test::TempFilename(test::OutputPath(),
	"utils_test");

	file->OpenFile(kOutFileName.c_str(),
	false, // Write mode.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	const size_t kBufferLength = 3;
	scoped_ptr<float[]> written_buffer(new float[kBufferLength]);
	scoped_ptr<float[]> read_buffer(new float[kBufferLength]);

	written_buffer[0] = kPi;
	written_buffer[1] = kE;
	written_buffer[2] = kAvogadro;

	EXPECT_EQ(kBufferLength, WriteFloatBufferToFile(file.get(),
	kBufferLength,
	written_buffer.get()));

	file->CloseFile();

	file->OpenFile(kOutFileName.c_str(),
	true, // Read only.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	EXPECT_EQ(kBufferLength, ReadFloatBufferFromFile(file.get(),
	kBufferLength,
	read_buffer.get()));
	EXPECT_EQ(0, memcmp(written_buffer.get(),
	read_buffer.get(),
	kBufferLength * sizeof(written_buffer[0])));
	}

	TEST_F(TransientFileUtilsTest, WriteDoubleBufferToFile) {
	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	std::string kOutFileName = test::TempFilename(test::OutputPath(),
	"utils_test");

	file->OpenFile(kOutFileName.c_str(),
	false, // Write mode.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	const size_t kBufferLength = 3;
	scoped_ptr<double[]> written_buffer(new double[kBufferLength]);
	scoped_ptr<double[]> read_buffer(new double[kBufferLength]);

	written_buffer[0] = kPi;
	written_buffer[1] = kE;
	written_buffer[2] = kAvogadro;

	EXPECT_EQ(kBufferLength, WriteDoubleBufferToFile(file.get(),
	kBufferLength,
	written_buffer.get()));

	file->CloseFile();

	file->OpenFile(kOutFileName.c_str(),
	true, // Read only.
	false, // No loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kOutFileName.c_str();

	EXPECT_EQ(kBufferLength, ReadDoubleBufferFromFile(file.get(),
	kBufferLength,
	read_buffer.get()));
	EXPECT_EQ(0, memcmp(written_buffer.get(),
	read_buffer.get(),
	kBufferLength * sizeof(written_buffer[0])));
	}

	TEST_F(TransientFileUtilsTest, ExpectedErrorReturnValues) {
	std::string test_filename = kTestFileName;

	double value;
	scoped_ptr<int16_t[]> int16_buffer(new int16_t[1]);
	scoped_ptr<double[]> double_buffer(new double[1]);
	scoped_ptr<FileWrapper> file(FileWrapper::Create());

	EXPECT_EQ(-1, ConvertByteArrayToDouble(NULL, &value));
	EXPECT_EQ(-1, ConvertByteArrayToDouble(kPiBytes, NULL));

	EXPECT_EQ(-1, ConvertDoubleToByteArray(kPi, NULL));

	// Tests with file not opened.
	EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 1, int16_buffer.get()));
	EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(),
	1,
	double_buffer.get()));
	EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 1, double_buffer.get()));
	EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 1, int16_buffer.get()));
	EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 1, double_buffer.get()));

	file->OpenFile(test_filename.c_str(),
	true, // Read only.
	true, // Loop.
	false); // No text.
	ASSERT_TRUE(file->Open()) << "File could not be opened:\n"
	<< kTestFileName.c_str();

	EXPECT_EQ(0u, ReadInt16BufferFromFile(NULL, 1, int16_buffer.get()));
	EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 1, NULL));
	EXPECT_EQ(0u, ReadInt16BufferFromFile(file.get(), 0, int16_buffer.get()));

	EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(NULL, 1, double_buffer.get()));
	EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(), 1, NULL));
	EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(file.get(),
	0,
	double_buffer.get()));

	EXPECT_EQ(0u, ReadDoubleBufferFromFile(NULL, 1, double_buffer.get()));
	EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 1, NULL));
	EXPECT_EQ(0u, ReadDoubleBufferFromFile(file.get(), 0, double_buffer.get()));

	EXPECT_EQ(0u, WriteInt16BufferToFile(NULL, 1, int16_buffer.get()));
	EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 1, NULL));
	EXPECT_EQ(0u, WriteInt16BufferToFile(file.get(), 0, int16_buffer.get()));

	EXPECT_EQ(0u, WriteDoubleBufferToFile(NULL, 1, double_buffer.get()));
	EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 1, NULL));
	EXPECT_EQ(0u, WriteDoubleBufferToFile(file.get(), 0, double_buffer.get()));
	}

	} // namespace webrtc