1 files changed, 501 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/transient/file_utils_unittest.cc b/third_party/libwebrtc/modules/audio_processing/transient/file_utils_unittest.cc
new file mode 100644
index 0000000000..a9dddb1eda
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_processing/transient/file_utils_unittest.cc
@@ -0,0 +1,501 @@
+/*
+ *  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 "modules/audio_processing/transient/file_utils.h"
+
+#include <string.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/system/file_wrapper.h"
+#include "test/gtest.h"
+#include "test/testsupport/file_utils.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")) {}
+
+  ~TransientFileUtilsTest() override { CleanupTempFiles(); }
+
+  std::string CreateTempFilename(absl::string_view dir,
+                                 absl::string_view prefix) {
+    std::string filename = test::TempFilename(dir, prefix);
+    temp_filenames_.push_back(filename);
+    return filename;
+  }
+
+  void CleanupTempFiles() {
+    for (const std::string& filename : temp_filenames_) {
+      remove(filename.c_str());
+    }
+    temp_filenames_.clear();
+  }
+
+  // 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;
+
+  // List of temporary filenames created by CreateTempFilename.
+  std::vector<std::string> temp_filenames_;
+};
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ConvertByteArrayToFloat DISABLED_ConvertByteArrayToFloat
+#else
+#define MAYBE_ConvertByteArrayToFloat ConvertByteArrayToFloat
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_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);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ConvertByteArrayToDouble DISABLED_ConvertByteArrayToDouble
+#else
+#define MAYBE_ConvertByteArrayToDouble ConvertByteArrayToDouble
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_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);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ConvertFloatToByteArray DISABLED_ConvertFloatToByteArray
+#else
+#define MAYBE_ConvertFloatToByteArray ConvertFloatToByteArray
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ConvertFloatToByteArray) {
+  std::unique_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));
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ConvertDoubleToByteArray DISABLED_ConvertDoubleToByteArray
+#else
+#define MAYBE_ConvertDoubleToByteArray ConvertDoubleToByteArray
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ConvertDoubleToByteArray) {
+  std::unique_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));
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ReadInt16BufferFromFile DISABLED_ReadInt16BufferFromFile
+#else
+#define MAYBE_ReadInt16BufferFromFile ReadInt16BufferFromFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ReadInt16BufferFromFile) {
+  std::string test_filename = kTestFileName;
+
+  FileWrapper file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileName.c_str();
+
+  const size_t kBufferLength = 12;
+  std::unique_ptr<int16_t[]> buffer(new int16_t[kBufferLength]);
+
+  EXPECT_EQ(kBufferLength,
+            ReadInt16BufferFromFile(&file, 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, kBufferLenghtLargerThanFile,
+                                    buffer.get()));
+  EXPECT_EQ(11544, buffer[0]);
+  EXPECT_EQ(22377, buffer[4]);
+  EXPECT_EQ(16389, buffer[7]);
+  EXPECT_EQ(17631, buffer[kBufferLength - 1]);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ReadInt16FromFileToFloatBuffer \
+  DISABLED_ReadInt16FromFileToFloatBuffer
+#else
+#define MAYBE_ReadInt16FromFileToFloatBuffer ReadInt16FromFileToFloatBuffer
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ReadInt16FromFileToFloatBuffer) {
+  std::string test_filename = kTestFileName;
+
+  FileWrapper file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileName.c_str();
+
+  const size_t kBufferLength = 12;
+  std::unique_ptr<float[]> buffer(new float[kBufferLength]);
+
+  EXPECT_EQ(kBufferLength,
+            ReadInt16FromFileToFloatBuffer(&file, 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, 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]);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ReadInt16FromFileToDoubleBuffer \
+  DISABLED_ReadInt16FromFileToDoubleBuffer
+#else
+#define MAYBE_ReadInt16FromFileToDoubleBuffer ReadInt16FromFileToDoubleBuffer
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ReadInt16FromFileToDoubleBuffer) {
+  std::string test_filename = kTestFileName;
+
+  FileWrapper file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileName.c_str();
+
+  const size_t kBufferLength = 12;
+  std::unique_ptr<double[]> buffer(new double[kBufferLength]);
+
+  EXPECT_EQ(kBufferLength, ReadInt16FromFileToDoubleBuffer(&file, 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, 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]);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ReadFloatBufferFromFile DISABLED_ReadFloatBufferFromFile
+#else
+#define MAYBE_ReadFloatBufferFromFile ReadFloatBufferFromFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ReadFloatBufferFromFile) {
+  std::string test_filename = kTestFileNamef;
+
+  FileWrapper file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileNamef.c_str();
+
+  const size_t kBufferLength = 3;
+  std::unique_ptr<float[]> buffer(new float[kBufferLength]);
+
+  EXPECT_EQ(kBufferLength,
+            ReadFloatBufferFromFile(&file, 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, kBufferLenghtLargerThanFile,
+                                    buffer.get()));
+  EXPECT_FLOAT_EQ(kPi, buffer[0]);
+  EXPECT_FLOAT_EQ(kE, buffer[1]);
+  EXPECT_FLOAT_EQ(kAvogadro, buffer[2]);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ReadDoubleBufferFromFile DISABLED_ReadDoubleBufferFromFile
+#else
+#define MAYBE_ReadDoubleBufferFromFile ReadDoubleBufferFromFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ReadDoubleBufferFromFile) {
+  std::string test_filename = kTestFileName;
+
+  FileWrapper file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileName.c_str();
+
+  const size_t kBufferLength = 3;
+  std::unique_ptr<double[]> buffer(new double[kBufferLength]);
+
+  EXPECT_EQ(kBufferLength,
+            ReadDoubleBufferFromFile(&file, 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, kBufferLenghtLargerThanFile,
+                                     buffer.get()));
+  EXPECT_DOUBLE_EQ(kPi, buffer[0]);
+  EXPECT_DOUBLE_EQ(kE, buffer[1]);
+  EXPECT_DOUBLE_EQ(kAvogadro, buffer[2]);
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_WriteInt16BufferToFile DISABLED_WriteInt16BufferToFile
+#else
+#define MAYBE_WriteInt16BufferToFile WriteInt16BufferToFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_WriteInt16BufferToFile) {
+  std::string kOutFileName =
+      CreateTempFilename(test::OutputPath(), "utils_test");
+
+  FileWrapper file = FileWrapper::OpenWriteOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  const size_t kBufferLength = 3;
+  std::unique_ptr<int16_t[]> written_buffer(new int16_t[kBufferLength]);
+  std::unique_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, kBufferLength, written_buffer.get()));
+
+  file.Close();
+
+  file = FileWrapper::OpenReadOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  EXPECT_EQ(kBufferLength,
+            ReadInt16BufferFromFile(&file, kBufferLength, read_buffer.get()));
+  EXPECT_EQ(0, memcmp(written_buffer.get(), read_buffer.get(),
+                      kBufferLength * sizeof(written_buffer[0])));
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_WriteFloatBufferToFile DISABLED_WriteFloatBufferToFile
+#else
+#define MAYBE_WriteFloatBufferToFile WriteFloatBufferToFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_WriteFloatBufferToFile) {
+  std::string kOutFileName =
+      CreateTempFilename(test::OutputPath(), "utils_test");
+
+  FileWrapper file = FileWrapper::OpenWriteOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  const size_t kBufferLength = 3;
+  std::unique_ptr<float[]> written_buffer(new float[kBufferLength]);
+  std::unique_ptr<float[]> read_buffer(new float[kBufferLength]);
+
+  written_buffer[0] = static_cast<float>(kPi);
+  written_buffer[1] = static_cast<float>(kE);
+  written_buffer[2] = static_cast<float>(kAvogadro);
+
+  EXPECT_EQ(kBufferLength,
+            WriteFloatBufferToFile(&file, kBufferLength, written_buffer.get()));
+
+  file.Close();
+
+  file = FileWrapper::OpenReadOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  EXPECT_EQ(kBufferLength,
+            ReadFloatBufferFromFile(&file, kBufferLength, read_buffer.get()));
+  EXPECT_EQ(0, memcmp(written_buffer.get(), read_buffer.get(),
+                      kBufferLength * sizeof(written_buffer[0])));
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_WriteDoubleBufferToFile DISABLED_WriteDoubleBufferToFile
+#else
+#define MAYBE_WriteDoubleBufferToFile WriteDoubleBufferToFile
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_WriteDoubleBufferToFile) {
+  std::string kOutFileName =
+      CreateTempFilename(test::OutputPath(), "utils_test");
+
+  FileWrapper file = FileWrapper::OpenWriteOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  const size_t kBufferLength = 3;
+  std::unique_ptr<double[]> written_buffer(new double[kBufferLength]);
+  std::unique_ptr<double[]> read_buffer(new double[kBufferLength]);
+
+  written_buffer[0] = kPi;
+  written_buffer[1] = kE;
+  written_buffer[2] = kAvogadro;
+
+  EXPECT_EQ(kBufferLength, WriteDoubleBufferToFile(&file, kBufferLength,
+                                                   written_buffer.get()));
+
+  file.Close();
+
+  file = FileWrapper::OpenReadOnly(kOutFileName);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kOutFileName.c_str();
+
+  EXPECT_EQ(kBufferLength,
+            ReadDoubleBufferFromFile(&file, kBufferLength, read_buffer.get()));
+  EXPECT_EQ(0, memcmp(written_buffer.get(), read_buffer.get(),
+                      kBufferLength * sizeof(written_buffer[0])));
+}
+
+#if defined(WEBRTC_IOS)
+#define MAYBE_ExpectedErrorReturnValues DISABLED_ExpectedErrorReturnValues
+#else
+#define MAYBE_ExpectedErrorReturnValues ExpectedErrorReturnValues
+#endif
+TEST_F(TransientFileUtilsTest, MAYBE_ExpectedErrorReturnValues) {
+  std::string test_filename = kTestFileName;
+
+  double value;
+  std::unique_ptr<int16_t[]> int16_buffer(new int16_t[1]);
+  std::unique_ptr<double[]> double_buffer(new double[1]);
+  FileWrapper file;
+
+  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, 1, int16_buffer.get()));
+  EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(&file, 1, double_buffer.get()));
+  EXPECT_EQ(0u, ReadDoubleBufferFromFile(&file, 1, double_buffer.get()));
+  EXPECT_EQ(0u, WriteInt16BufferToFile(&file, 1, int16_buffer.get()));
+  EXPECT_EQ(0u, WriteDoubleBufferToFile(&file, 1, double_buffer.get()));
+
+  file = FileWrapper::OpenReadOnly(test_filename);
+  ASSERT_TRUE(file.is_open()) << "File could not be opened:\n"
+                              << kTestFileName.c_str();
+
+  EXPECT_EQ(0u, ReadInt16BufferFromFile(NULL, 1, int16_buffer.get()));
+  EXPECT_EQ(0u, ReadInt16BufferFromFile(&file, 1, NULL));
+  EXPECT_EQ(0u, ReadInt16BufferFromFile(&file, 0, int16_buffer.get()));
+
+  EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(NULL, 1, double_buffer.get()));
+  EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(&file, 1, NULL));
+  EXPECT_EQ(0u, ReadInt16FromFileToDoubleBuffer(&file, 0, double_buffer.get()));
+
+  EXPECT_EQ(0u, ReadDoubleBufferFromFile(NULL, 1, double_buffer.get()));
+  EXPECT_EQ(0u, ReadDoubleBufferFromFile(&file, 1, NULL));
+  EXPECT_EQ(0u, ReadDoubleBufferFromFile(&file, 0, double_buffer.get()));
+
+  EXPECT_EQ(0u, WriteInt16BufferToFile(NULL, 1, int16_buffer.get()));
+  EXPECT_EQ(0u, WriteInt16BufferToFile(&file, 1, NULL));
+  EXPECT_EQ(0u, WriteInt16BufferToFile(&file, 0, int16_buffer.get()));
+
+  EXPECT_EQ(0u, WriteDoubleBufferToFile(NULL, 1, double_buffer.get()));
+  EXPECT_EQ(0u, WriteDoubleBufferToFile(&file, 1, NULL));
+  EXPECT_EQ(0u, WriteDoubleBufferToFile(&file, 0, double_buffer.get()));
+}
+
+}  // namespace webrtc