| // Copyright 2014 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 "components/metrics/compression_utils.h" |
| |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace metrics { |
| |
| namespace { |
| |
| // The data to be compressed by gzip. This is the hex representation of "hello |
| // world". |
| const uint8 kData[] = |
| {0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, |
| 0x72, 0x6c, 0x64}; |
| |
| // This is the string representation of gzip compressed string above. It was |
| // obtained by running echo -n "hello world" | gzip -c | hexdump -e '8 1 ", |
| // 0x%x"' followed by 0'ing out the OS byte (10th byte) in the header. This is |
| // so that the test passes on all platforms (that run various OS'es). |
| const uint8 kCompressedData[] = |
| {0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0xcb, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, |
| 0x2f, 0xca, 0x49, 0x01, 0x00, 0x85, 0x11, 0x4a, 0x0d, |
| 0x0b, 0x00, 0x00, 0x00}; |
| |
| } // namespace |
| |
| TEST(CompressionUtilsTest, GzipCompression) { |
| std::string data(reinterpret_cast<const char*>(kData), arraysize(kData)); |
| std::string compressed_data; |
| EXPECT_TRUE(GzipCompress(data, &compressed_data)); |
| std::string golden_compressed_data( |
| reinterpret_cast<const char*>(kCompressedData), |
| arraysize(kCompressedData)); |
| EXPECT_EQ(golden_compressed_data, compressed_data); |
| } |
| |
| TEST(CompressionUtilsTest, GzipUncompression) { |
| std::string compressed_data(reinterpret_cast<const char*>(kCompressedData), |
| arraysize(kCompressedData)); |
| |
| std::string uncompressed_data; |
| EXPECT_TRUE(GzipUncompress(compressed_data, &uncompressed_data)); |
| |
| std::string golden_data(reinterpret_cast<const char*>(kData), |
| arraysize(kData)); |
| EXPECT_EQ(golden_data, uncompressed_data); |
| } |
| |
| // Checks that compressing/decompressing input > 256 bytes works as expected. |
| TEST(CompressionUtilsTest, LargeInput) { |
| const size_t kSize = 32 * 1024; |
| |
| // Generate a data string of |kSize| for testing. |
| std::string data; |
| data.resize(kSize); |
| for (size_t i = 0; i < kSize; ++i) |
| data[i] = static_cast<char>(i & 0xFF); |
| |
| std::string compressed_data; |
| EXPECT_TRUE(GzipCompress(data, &compressed_data)); |
| |
| std::string uncompressed_data; |
| EXPECT_TRUE(GzipUncompress(compressed_data, &uncompressed_data)); |
| |
| EXPECT_EQ(data, uncompressed_data); |
| } |
| |
| } // namespace metrics |