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| 1 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include <string.h> |
| 6 #include <unistd.h> |
| 7 #include <string> |
| 8 #include <vector> |
| 9 #include <gtest/gtest.h> |
| 10 #include "update_engine/gzip.h" |
| 11 #include "update_engine/test_utils.h" |
| 12 #include "update_engine/utils.h" |
| 13 |
| 14 using std::string; |
| 15 using std::vector; |
| 16 |
| 17 namespace chromeos_update_engine { |
| 18 |
| 19 class GzipTest : public ::testing::Test { }; |
| 20 |
| 21 TEST(GzipTest, SimpleTest) { |
| 22 string in("this should compress well xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
| 23 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
| 24 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
| 25 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
| 26 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
| 27 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"); |
| 28 vector<char> out; |
| 29 EXPECT_TRUE(GzipCompressString(in, &out)); |
| 30 EXPECT_LT(out.size(), in.size()); |
| 31 EXPECT_GT(out.size(), 0); |
| 32 vector<char> decompressed; |
| 33 EXPECT_TRUE(GzipDecompress(out, &decompressed)); |
| 34 EXPECT_EQ(in.size(), decompressed.size()); |
| 35 EXPECT_TRUE(!memcmp(in.data(), &decompressed[0], in.size())); |
| 36 } |
| 37 |
| 38 TEST(GzipTest, PoorCompressionTest) { |
| 39 string in(reinterpret_cast<const char*>(kRandomString), |
| 40 sizeof(kRandomString)); |
| 41 vector<char> out; |
| 42 EXPECT_TRUE(GzipCompressString(in, &out)); |
| 43 EXPECT_GT(out.size(), in.size()); |
| 44 string out_string(&out[0], out.size()); |
| 45 vector<char> decompressed; |
| 46 EXPECT_TRUE(GzipDecompressString(out_string, &decompressed)); |
| 47 EXPECT_EQ(in.size(), decompressed.size()); |
| 48 EXPECT_TRUE(!memcmp(in.data(), &decompressed[0], in.size())); |
| 49 } |
| 50 |
| 51 TEST(GzipTest, MalformedGzipTest) { |
| 52 string in(reinterpret_cast<const char*>(kRandomString), |
| 53 sizeof(kRandomString)); |
| 54 vector<char> out; |
| 55 EXPECT_FALSE(GzipDecompressString(in, &out)); |
| 56 } |
| 57 |
| 58 TEST(GzipTest, EmptyInputsTest) { |
| 59 string in; |
| 60 vector<char> out; |
| 61 EXPECT_TRUE(GzipDecompressString(in, &out)); |
| 62 EXPECT_EQ(0, out.size()); |
| 63 |
| 64 EXPECT_TRUE(GzipCompressString(in, &out)); |
| 65 EXPECT_EQ(0, out.size()); |
| 66 } |
| 67 |
| 68 } // namespace chromeos_update_engine |
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