// 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 #include #include #include #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 patch_buffer(patch_writer.SerializedSize()); patch_writer.SerializeInto({patch_buffer.data(), patch_buffer.size()}); // Read back generated patch. absl::optional 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 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