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