1 // Copyright 2015 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 "bsdiff.h"
6
7 #include <gtest/gtest.h>
8 #include <string>
9 #include <vector>
10
11 #include "test_utils.h"
12
13 using std::string;
14 using std::vector;
15 using test_utils::BsdiffPatchFile;
16
17 namespace bsdiff {
18
19 class BsdiffTest : public testing::Test {
20 protected:
BsdiffTest()21 BsdiffTest()
22 : old_file_("bsdiff_oldfile.XXXXXX"),
23 new_file_("bsdiff_newfile.XXXXXX"),
24 patch_file_("bsdiff_patchfile.XXXXXX") {
25 }
~BsdiffTest()26 ~BsdiffTest() override {}
27
28 test_utils::ScopedTempFile old_file_;
29 test_utils::ScopedTempFile new_file_;
30 test_utils::ScopedTempFile patch_file_;
31 };
32
33 // Check that a file with no changes has a very small patch (no extra data).
TEST_F(BsdiffTest,EqualEmptyFiles)34 TEST_F(BsdiffTest, EqualEmptyFiles) {
35 // Empty old and new files.
36 EXPECT_EQ(0, bsdiff(old_file_.filename().c_str(),
37 new_file_.filename().c_str(),
38 patch_file_.filename().c_str()));
39 BsdiffPatchFile patch;
40 EXPECT_TRUE(patch.LoadFromFile(patch_file_.filename()));
41 EXPECT_TRUE(patch.IsValid());
42
43 // An empty bz2 file will have 14 bytes.
44 EXPECT_EQ(14, patch.diff_len);
45 EXPECT_EQ(14U, patch.extra_len);
46 }
47
TEST_F(BsdiffTest,EqualSmallFiles)48 TEST_F(BsdiffTest, EqualSmallFiles) {
49 string some_text = "Hello world!";
50 vector<uint8_t> vec_some_text(some_text.begin(), some_text.end());
51 test_utils::WriteFile(old_file_.filename(), vec_some_text);
52 EXPECT_EQ(0, bsdiff(old_file_.filename().c_str(),
53 new_file_.filename().c_str(),
54 patch_file_.filename().c_str()));
55 BsdiffPatchFile patch;
56 EXPECT_TRUE(patch.LoadFromFile(patch_file_.filename()));
57 EXPECT_TRUE(patch.IsValid());
58
59 // An empty bz2 file will have 14 bytes.
60 EXPECT_EQ(14, patch.diff_len);
61 EXPECT_EQ(14U, patch.extra_len);
62 }
63
64 } // namespace bsdiff
65