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- // Copyright 2017 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 <stdint.h>
- #include <algorithm>
- #include <string>
- #include <vector>
- #include "base/files/file_path.h"
- #include "base/files/memory_mapped_file.h"
- #include "base/path_service.h"
- #include "components/zucchini/buffer_view.h"
- #include "components/zucchini/patch_reader.h"
- #include "components/zucchini/patch_writer.h"
- #include "components/zucchini/zucchini.h"
- #include "testing/gtest/include/gtest/gtest.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace zucchini {
- base::FilePath MakeTestPath(const std::string& filename) {
- base::FilePath path;
- DCHECK(base::PathService::Get(base::DIR_SOURCE_ROOT, &path));
- return path.AppendASCII("components")
- .AppendASCII("zucchini")
- .AppendASCII("testdata")
- .AppendASCII(filename);
- }
- void TestGenApply(const std::string& old_filename,
- const std::string& new_filename,
- bool raw) {
- base::FilePath old_path = MakeTestPath(old_filename);
- base::FilePath new_path = MakeTestPath(new_filename);
- base::MemoryMappedFile old_file;
- ASSERT_TRUE(old_file.Initialize(old_path));
- base::MemoryMappedFile new_file;
- ASSERT_TRUE(new_file.Initialize(new_path));
- ConstBufferView old_region(old_file.data(), old_file.length());
- ConstBufferView new_region(new_file.data(), new_file.length());
- EnsemblePatchWriter patch_writer(old_region, new_region);
- // Generate patch from "old" to "new".
- ASSERT_EQ(status::kStatusSuccess,
- raw ? GenerateBufferRaw(old_region, new_region, &patch_writer)
- : GenerateBuffer(old_region, new_region, &patch_writer));
- size_t patch_size = patch_writer.SerializedSize();
- EXPECT_GE(patch_size, 80U); // Minimum size is empty patch.
- // TODO(etiennep): Add check on maximum expected size.
- std::vector<uint8_t> patch_buffer(patch_writer.SerializedSize());
- patch_writer.SerializeInto({patch_buffer.data(), patch_buffer.size()});
- // Read back generated patch.
- absl::optional<EnsemblePatchReader> patch_reader =
- EnsemblePatchReader::Create({patch_buffer.data(), patch_buffer.size()});
- ASSERT_TRUE(patch_reader.has_value());
- // Check basic properties.
- EXPECT_TRUE(patch_reader->CheckOldFile(old_region));
- EXPECT_TRUE(patch_reader->CheckNewFile(new_region));
- EXPECT_EQ(old_file.length(), patch_reader->header().old_size);
- // If new_size doesn't match expectation, the function is aborted.
- ASSERT_EQ(new_file.length(), patch_reader->header().new_size);
- // Apply patch to "old" to get "patched new", ensure it's identical to "new".
- std::vector<uint8_t> patched_new_buffer(new_region.size());
- ASSERT_EQ(status::kStatusSuccess, ApplyBuffer(old_region, *patch_reader,
- {patched_new_buffer.data(),
- patched_new_buffer.size()}));
- // Note that |new_region| and |patched_new_buffer| are the same size.
- EXPECT_TRUE(std::equal(new_region.begin(), new_region.end(),
- patched_new_buffer.begin()));
- }
- TEST(EndToEndTest, GenApplyRaw) {
- TestGenApply("setup1.exe", "setup2.exe", true);
- TestGenApply("chrome64_1.exe", "chrome64_2.exe", true);
- }
- TEST(EndToEndTest, GenApplyIdentity) {
- TestGenApply("setup1.exe", "setup1.exe", false);
- }
- TEST(EndToEndTest, GenApplySimple) {
- TestGenApply("setup1.exe", "setup2.exe", false);
- TestGenApply("setup2.exe", "setup1.exe", false);
- TestGenApply("chrome64_1.exe", "chrome64_2.exe", false);
- }
- TEST(EndToEndTest, GenApplyCross) {
- TestGenApply("setup1.exe", "chrome64_1.exe", false);
- }
- } // namespace zucchini
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