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system/update_engine/payload_generator/ab_generator_unittest.cc

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//
// Copyright (C) 2015 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "update_engine/payload_generator/ab_generator.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <random>
#include <string>
#include <vector>
#include <gtest/gtest.h>
#include "update_engine/common/hash_calculator.h"
#include "update_engine/common/test_utils.h"
#include "update_engine/common/utils.h"
#include "update_engine/payload_generator/annotated_operation.h"
#include "update_engine/payload_generator/delta_diff_generator.h"
#include "update_engine/payload_generator/extent_ranges.h"
#include "update_engine/payload_generator/extent_utils.h"
#include "update_engine/payload_generator/xz.h"
using std::string;
using std::vector;
namespace chromeos_update_engine {
namespace {
bool ExtentEquals(const Extent& ext,
uint64_t start_block,
uint64_t num_blocks) {
return ext.start_block() == start_block && ext.num_blocks() == num_blocks;
}
// Tests splitting of a REPLACE/REPLACE_XZ operation.
void TestSplitReplaceOrReplaceXzOperation(InstallOperation::Type orig_type,
bool compressible) {
const size_t op_ex1_start_block = 2;
const size_t op_ex1_num_blocks = 2;
const size_t op_ex2_start_block = 6;
const size_t op_ex2_num_blocks = 1;
const size_t part_num_blocks = 7;
// Create the target partition data.
const size_t part_size = part_num_blocks * kBlockSize;
brillo::Blob part_data;
if (compressible) {
part_data.resize(part_size);
test_utils::FillWithData(&part_data);
} else {
std::mt19937 gen(12345);
std::uniform_int_distribution<uint8_t> dis(0, 255);
for (uint32_t i = 0; i < part_size; i++)
part_data.push_back(dis(gen));
}
ASSERT_EQ(part_size, part_data.size());
ScopedTempFile part_file("SplitReplaceOrReplaceXzTest_part.XXXXXX");
ASSERT_TRUE(test_utils::WriteFileVector(part_file.path(), part_data));
// Create original operation and blob data.
const size_t op_ex1_offset = op_ex1_start_block * kBlockSize;
const size_t op_ex1_size = op_ex1_num_blocks * kBlockSize;
const size_t op_ex2_offset = op_ex2_start_block * kBlockSize;
const size_t op_ex2_size = op_ex2_num_blocks * kBlockSize;
InstallOperation op;
op.set_type(orig_type);
*(op.add_dst_extents()) =
ExtentForRange(op_ex1_start_block, op_ex1_num_blocks);
*(op.add_dst_extents()) =
ExtentForRange(op_ex2_start_block, op_ex2_num_blocks);
brillo::Blob op_data;
op_data.insert(op_data.end(),
part_data.begin() + op_ex1_offset,
part_data.begin() + op_ex1_offset + op_ex1_size);
op_data.insert(op_data.end(),
part_data.begin() + op_ex2_offset,
part_data.begin() + op_ex2_offset + op_ex2_size);
brillo::Blob op_blob;
if (orig_type == InstallOperation::REPLACE) {
op_blob = op_data;
} else {
ASSERT_TRUE(XzCompress(op_data, &op_blob));
}
op.set_data_offset(0);
op.set_data_length(op_blob.size());
AnnotatedOperation aop;
aop.op = op;
aop.name = "SplitTestOp";
// Create the data file.
ScopedTempFile data_file("SplitReplaceOrReplaceXzTest_data.XXXXXX");
EXPECT_TRUE(test_utils::WriteFileVector(data_file.path(), op_blob));
int data_fd = open(data_file.path().c_str(), O_RDWR, 000);
EXPECT_GE(data_fd, 0);
ScopedFdCloser data_fd_closer(&data_fd);
off_t data_file_size = op_blob.size();
BlobFileWriter blob_file(data_fd, &data_file_size);
// Split the operation.
vector<AnnotatedOperation> result_ops;
PayloadVersion version(kBrilloMajorPayloadVersion,
kSourceMinorPayloadVersion);
ASSERT_TRUE(ABGenerator::SplitAReplaceOp(
version, aop, part_file.path(), &result_ops, &blob_file));
// Check the result.
InstallOperation::Type expected_type =
compressible ? InstallOperation::REPLACE_XZ : InstallOperation::REPLACE;
ASSERT_EQ(2U, result_ops.size());
EXPECT_EQ("SplitTestOp:0", result_ops[0].name);
InstallOperation first_op = result_ops[0].op;
EXPECT_EQ(expected_type, first_op.type());
EXPECT_FALSE(first_op.has_src_length());
EXPECT_FALSE(first_op.has_dst_length());
EXPECT_EQ(1, first_op.dst_extents().size());
EXPECT_TRUE(ExtentEquals(
first_op.dst_extents(0), op_ex1_start_block, op_ex1_num_blocks));
// Obtain the expected blob.
brillo::Blob first_expected_data(
part_data.begin() + op_ex1_offset,
part_data.begin() + op_ex1_offset + op_ex1_size);
brillo::Blob first_expected_blob;
if (compressible) {
ASSERT_TRUE(XzCompress(first_expected_data, &first_expected_blob));
} else {
first_expected_blob = first_expected_data;
}
EXPECT_EQ(first_expected_blob.size(), first_op.data_length());
// Check that the actual blob matches what's expected.
brillo::Blob first_data_blob(first_op.data_length());
ssize_t bytes_read;
ASSERT_TRUE(utils::PReadAll(data_fd,
first_data_blob.data(),
first_op.data_length(),
first_op.data_offset(),
&bytes_read));
ASSERT_EQ(bytes_read, static_cast<ssize_t>(first_op.data_length()));
EXPECT_EQ(first_expected_blob, first_data_blob);
EXPECT_EQ("SplitTestOp:1", result_ops[1].name);
InstallOperation second_op = result_ops[1].op;
EXPECT_EQ(expected_type, second_op.type());
EXPECT_FALSE(second_op.has_src_length());
EXPECT_FALSE(second_op.has_dst_length());
EXPECT_EQ(1, second_op.dst_extents().size());
EXPECT_TRUE(ExtentEquals(
second_op.dst_extents(0), op_ex2_start_block, op_ex2_num_blocks));
// Obtain the expected blob.
brillo::Blob second_expected_data(
part_data.begin() + op_ex2_offset,
part_data.begin() + op_ex2_offset + op_ex2_size);
brillo::Blob second_expected_blob;
if (compressible) {
ASSERT_TRUE(XzCompress(second_expected_data, &second_expected_blob));
} else {
second_expected_blob = second_expected_data;
}
EXPECT_EQ(second_expected_blob.size(), second_op.data_length());
// Check that the actual blob matches what's expected.
brillo::Blob second_data_blob(second_op.data_length());
ASSERT_TRUE(utils::PReadAll(data_fd,
second_data_blob.data(),
second_op.data_length(),
second_op.data_offset(),
&bytes_read));
ASSERT_EQ(bytes_read, static_cast<ssize_t>(second_op.data_length()));
EXPECT_EQ(second_expected_blob, second_data_blob);
// Check relative layout of data blobs.
EXPECT_EQ(first_op.data_offset() + first_op.data_length(),
second_op.data_offset());
EXPECT_EQ(second_op.data_offset() + second_op.data_length(),
static_cast<uint64_t>(data_file_size));
// If we split a REPLACE into multiple ones, ensure reuse of preexisting blob.
if (!compressible && orig_type == InstallOperation::REPLACE) {
EXPECT_EQ(0U, first_op.data_offset());
}
}
// Tests merging of REPLACE/REPLACE_XZ operations.
void TestMergeReplaceOrReplaceXzOperations(InstallOperation::Type orig_type,
bool compressible) {
const size_t first_op_num_blocks = 1;
const size_t second_op_num_blocks = 2;
const size_t total_op_num_blocks = first_op_num_blocks + second_op_num_blocks;
const size_t part_num_blocks = total_op_num_blocks + 2;
// Create the target partition data.
const size_t part_size = part_num_blocks * kBlockSize;
brillo::Blob part_data;
if (compressible) {
part_data.resize(part_size);
test_utils::FillWithData(&part_data);
} else {
std::mt19937 gen(12345);
std::uniform_int_distribution<uint8_t> dis(0, 255);
for (uint32_t i = 0; i < part_size; i++)
part_data.push_back(dis(gen));
}
ASSERT_EQ(part_size, part_data.size());
ScopedTempFile part_file("MergeReplaceOrReplaceXzTest_part.XXXXXX");
ASSERT_TRUE(test_utils::WriteFileVector(part_file.path(), part_data));
// Create original operations and blob data.
vector<AnnotatedOperation> aops;
brillo::Blob blob_data;
const size_t total_op_size = total_op_num_blocks * kBlockSize;
InstallOperation first_op;
first_op.set_type(orig_type);
const size_t first_op_size = first_op_num_blocks * kBlockSize;
*(first_op.add_dst_extents()) = ExtentForRange(0, first_op_num_blocks);
brillo::Blob first_op_data(part_data.begin(),
part_data.begin() + first_op_size);
brillo::Blob first_op_blob;
if (orig_type == InstallOperation::REPLACE) {
first_op_blob = first_op_data;
} else {
ASSERT_TRUE(XzCompress(first_op_data, &first_op_blob));
}
first_op.set_data_offset(0);
first_op.set_data_length(first_op_blob.size());
blob_data.insert(blob_data.end(), first_op_blob.begin(), first_op_blob.end());
AnnotatedOperation first_aop;
first_aop.op = first_op;
first_aop.name = "first";
aops.push_back(first_aop);
InstallOperation second_op;
second_op.set_type(orig_type);
*(second_op.add_dst_extents()) =
ExtentForRange(first_op_num_blocks, second_op_num_blocks);
brillo::Blob second_op_data(part_data.begin() + first_op_size,
part_data.begin() + total_op_size);
brillo::Blob second_op_blob;
if (orig_type == InstallOperation::REPLACE) {
second_op_blob = second_op_data;
} else {
ASSERT_TRUE(XzCompress(second_op_data, &second_op_blob));
}
second_op.set_data_offset(first_op_blob.size());
second_op.set_data_length(second_op_blob.size());
blob_data.insert(
blob_data.end(), second_op_blob.begin(), second_op_blob.end());
AnnotatedOperation second_aop;
second_aop.op = second_op;
second_aop.name = "second";
aops.push_back(second_aop);
// Create the data file.
ScopedTempFile data_file("MergeReplaceOrReplaceXzTest_data.XXXXXX");
EXPECT_TRUE(test_utils::WriteFileVector(data_file.path(), blob_data));
int data_fd = open(data_file.path().c_str(), O_RDWR, 000);
EXPECT_GE(data_fd, 0);
ScopedFdCloser data_fd_closer(&data_fd);
off_t data_file_size = blob_data.size();
BlobFileWriter blob_file(data_fd, &data_file_size);
// Merge the operations.
PayloadVersion version(kBrilloMajorPayloadVersion,
kSourceMinorPayloadVersion);
EXPECT_TRUE(ABGenerator::MergeOperations(
&aops, version, 5, part_file.path(), &blob_file));
// Check the result.
InstallOperation::Type expected_op_type =
compressible ? InstallOperation::REPLACE_XZ : InstallOperation::REPLACE;
EXPECT_EQ(1U, aops.size());
InstallOperation new_op = aops[0].op;
EXPECT_EQ(expected_op_type, new_op.type());
EXPECT_FALSE(new_op.has_src_length());
EXPECT_FALSE(new_op.has_dst_length());
EXPECT_EQ(1, new_op.dst_extents().size());
EXPECT_TRUE(ExtentEquals(new_op.dst_extents(0), 0, total_op_num_blocks));
EXPECT_EQ("first,second", aops[0].name);
// Check to see if the blob pointed to in the new extent has what we expect.
brillo::Blob expected_data(part_data.begin(),
part_data.begin() + total_op_size);
brillo::Blob expected_blob;
if (compressible) {
ASSERT_TRUE(XzCompress(expected_data, &expected_blob));
} else {
expected_blob = expected_data;
}
ASSERT_EQ(expected_blob.size(), new_op.data_length());
ASSERT_EQ(blob_data.size() + expected_blob.size(),
static_cast<size_t>(data_file_size));
brillo::Blob new_op_blob(new_op.data_length());
ssize_t bytes_read;
ASSERT_TRUE(utils::PReadAll(data_fd,
new_op_blob.data(),
new_op.data_length(),
new_op.data_offset(),
&bytes_read));
ASSERT_EQ(static_cast<ssize_t>(new_op.data_length()), bytes_read);
EXPECT_EQ(expected_blob, new_op_blob);
}
} // namespace
class ABGeneratorTest : public ::testing::Test {};
TEST_F(ABGeneratorTest, SplitSourceCopyTest) {
InstallOperation op;
op.set_type(InstallOperation::SOURCE_COPY);
*(op.add_src_extents()) = ExtentForRange(2, 3);
*(op.add_src_extents()) = ExtentForRange(6, 1);
*(op.add_src_extents()) = ExtentForRange(8, 4);
*(op.add_dst_extents()) = ExtentForRange(10, 2);
*(op.add_dst_extents()) = ExtentForRange(14, 3);
*(op.add_dst_extents()) = ExtentForRange(18, 3);
AnnotatedOperation aop;
aop.op = op;
aop.name = "SplitSourceCopyTestOp";
vector<AnnotatedOperation> result_ops;
EXPECT_TRUE(ABGenerator::SplitSourceCopy(aop, &result_ops));
EXPECT_EQ(3U, result_ops.size());
EXPECT_EQ("SplitSourceCopyTestOp:0", result_ops[0].name);
InstallOperation first_op = result_ops[0].op;
EXPECT_EQ(InstallOperation::SOURCE_COPY, first_op.type());
EXPECT_FALSE(first_op.has_src_length());
EXPECT_EQ(1, first_op.src_extents().size());
EXPECT_EQ(2U, first_op.src_extents(0).start_block());
EXPECT_EQ(2U, first_op.src_extents(0).num_blocks());
EXPECT_FALSE(first_op.has_dst_length());
EXPECT_EQ(1, first_op.dst_extents().size());
EXPECT_EQ(10U, first_op.dst_extents(0).start_block());
EXPECT_EQ(2U, first_op.dst_extents(0).num_blocks());
EXPECT_EQ("SplitSourceCopyTestOp:1", result_ops[1].name);
InstallOperation second_op = result_ops[1].op;
EXPECT_EQ(InstallOperation::SOURCE_COPY, second_op.type());
EXPECT_FALSE(second_op.has_src_length());
EXPECT_EQ(3, second_op.src_extents().size());
EXPECT_EQ(4U, second_op.src_extents(0).start_block());
EXPECT_EQ(1U, second_op.src_extents(0).num_blocks());
EXPECT_EQ(6U, second_op.src_extents(1).start_block());
EXPECT_EQ(1U, second_op.src_extents(1).num_blocks());
EXPECT_EQ(8U, second_op.src_extents(2).start_block());
EXPECT_EQ(1U, second_op.src_extents(2).num_blocks());
EXPECT_FALSE(second_op.has_dst_length());
EXPECT_EQ(1, second_op.dst_extents().size());
EXPECT_EQ(14U, second_op.dst_extents(0).start_block());
EXPECT_EQ(3U, second_op.dst_extents(0).num_blocks());
EXPECT_EQ("SplitSourceCopyTestOp:2", result_ops[2].name);
InstallOperation third_op = result_ops[2].op;
EXPECT_EQ(InstallOperation::SOURCE_COPY, third_op.type());
EXPECT_FALSE(third_op.has_src_length());
EXPECT_EQ(1, third_op.src_extents().size());
EXPECT_EQ(9U, third_op.src_extents(0).start_block());
EXPECT_EQ(3U, third_op.src_extents(0).num_blocks());
EXPECT_FALSE(third_op.has_dst_length());
EXPECT_EQ(1, third_op.dst_extents().size());
EXPECT_EQ(18U, third_op.dst_extents(0).start_block());
EXPECT_EQ(3U, third_op.dst_extents(0).num_blocks());
}
TEST_F(ABGeneratorTest, SplitReplaceTest) {
TestSplitReplaceOrReplaceXzOperation(InstallOperation::REPLACE, false);
}
TEST_F(ABGeneratorTest, SplitReplaceIntoReplaceXzTest) {
TestSplitReplaceOrReplaceXzOperation(InstallOperation::REPLACE, true);
}
TEST_F(ABGeneratorTest, SplitReplaceXzTest) {
TestSplitReplaceOrReplaceXzOperation(InstallOperation::REPLACE_XZ, true);
}
TEST_F(ABGeneratorTest, SplitReplaceXzIntoReplaceTest) {
TestSplitReplaceOrReplaceXzOperation(InstallOperation::REPLACE_XZ, false);
}
TEST_F(ABGeneratorTest, SortOperationsByDestinationTest) {
vector<AnnotatedOperation> aops;
// One operation with multiple destination extents.
InstallOperation first_op;
*(first_op.add_dst_extents()) = ExtentForRange(6, 1);
*(first_op.add_dst_extents()) = ExtentForRange(10, 2);
AnnotatedOperation first_aop;
first_aop.op = first_op;
first_aop.name = "first";
aops.push_back(first_aop);
// One with no destination extent. Should end up at the end of the vector.
InstallOperation second_op;
AnnotatedOperation second_aop;
second_aop.op = second_op;
second_aop.name = "second";
aops.push_back(second_aop);
// One with one destination extent.
InstallOperation third_op;
*(third_op.add_dst_extents()) = ExtentForRange(3, 2);
AnnotatedOperation third_aop;
third_aop.op = third_op;
third_aop.name = "third";
aops.push_back(third_aop);
ABGenerator::SortOperationsByDestination(&aops);
EXPECT_EQ(3U, aops.size());
EXPECT_EQ(third_aop.name, aops[0].name);
EXPECT_EQ(first_aop.name, aops[1].name);
EXPECT_EQ(second_aop.name, aops[2].name);
}
TEST_F(ABGeneratorTest, MergeSourceCopyOperationsTest) {
vector<AnnotatedOperation> aops;
InstallOperation first_op;
first_op.set_type(InstallOperation::SOURCE_COPY);
*(first_op.add_src_extents()) = ExtentForRange(1, 1);
*(first_op.add_dst_extents()) = ExtentForRange(6, 1);
AnnotatedOperation first_aop;
first_aop.op = first_op;
first_aop.name = "1";
aops.push_back(first_aop);
InstallOperation second_op;
second_op.set_type(InstallOperation::SOURCE_COPY);
*(second_op.add_src_extents()) = ExtentForRange(2, 2);
*(second_op.add_src_extents()) = ExtentForRange(8, 2);
*(second_op.add_dst_extents()) = ExtentForRange(7, 3);
*(second_op.add_dst_extents()) = ExtentForRange(11, 1);
AnnotatedOperation second_aop;
second_aop.op = second_op;
second_aop.name = "2";
aops.push_back(second_aop);
InstallOperation third_op;
third_op.set_type(InstallOperation::SOURCE_COPY);
*(third_op.add_src_extents()) = ExtentForRange(11, 1);
*(third_op.add_dst_extents()) = ExtentForRange(12, 1);
AnnotatedOperation third_aop;
third_aop.op = third_op;
third_aop.name = "3";
aops.push_back(third_aop);
BlobFileWriter blob_file(0, nullptr);
PayloadVersion version(kBrilloMajorPayloadVersion,
kSourceMinorPayloadVersion);
EXPECT_TRUE(ABGenerator::MergeOperations(&aops, version, 5, "", &blob_file));
EXPECT_EQ(1U, aops.size());
InstallOperation first_result_op = aops[0].op;
EXPECT_EQ(InstallOperation::SOURCE_COPY, first_result_op.type());
EXPECT_FALSE(first_result_op.has_src_length());
EXPECT_EQ(3, first_result_op.src_extents().size());
EXPECT_TRUE(ExtentEquals(first_result_op.src_extents(0), 1, 3));
EXPECT_TRUE(ExtentEquals(first_result_op.src_extents(1), 8, 2));
EXPECT_TRUE(ExtentEquals(first_result_op.src_extents(2), 11, 1));
EXPECT_FALSE(first_result_op.has_dst_length());
EXPECT_EQ(2, first_result_op.dst_extents().size());
EXPECT_TRUE(ExtentEquals(first_result_op.dst_extents(0), 6, 4));
EXPECT_TRUE(ExtentEquals(first_result_op.dst_extents(1), 11, 2));
EXPECT_EQ(aops[0].name, "1,2,3");
}
TEST_F(ABGeneratorTest, MergeReplaceOperationsTest) {
TestMergeReplaceOrReplaceXzOperations(InstallOperation::REPLACE, false);
}
TEST_F(ABGeneratorTest, MergeReplaceOperationsToReplaceXzTest) {
TestMergeReplaceOrReplaceXzOperations(InstallOperation::REPLACE, true);
}
TEST_F(ABGeneratorTest, MergeReplaceXzOperationsTest) {
TestMergeReplaceOrReplaceXzOperations(InstallOperation::REPLACE_XZ, true);
}
TEST_F(ABGeneratorTest, MergeReplaceXzOperationsToReplaceTest) {
TestMergeReplaceOrReplaceXzOperations(InstallOperation::REPLACE_XZ, false);
}
TEST_F(ABGeneratorTest, NoMergeOperationsTest) {
// Test to make sure we don't merge operations that shouldn't be merged.
vector<AnnotatedOperation> aops;
InstallOperation first_op;
first_op.set_type(InstallOperation::ZERO);
*(first_op.add_dst_extents()) = ExtentForRange(0, 1);
AnnotatedOperation first_aop;
first_aop.op = first_op;
aops.push_back(first_aop);
// Should merge with first, except op types don't match...
InstallOperation second_op;
second_op.set_type(InstallOperation::REPLACE);
*(second_op.add_dst_extents()) = ExtentForRange(1, 2);
second_op.set_data_length(2 * kBlockSize);
AnnotatedOperation second_aop;
second_aop.op = second_op;
aops.push_back(second_aop);
// Should merge with second, except it would exceed chunk size...
InstallOperation third_op;
third_op.set_type(InstallOperation::REPLACE);
*(third_op.add_dst_extents()) = ExtentForRange(3, 3);
third_op.set_data_length(3 * kBlockSize);
AnnotatedOperation third_aop;
third_aop.op = third_op;
aops.push_back(third_aop);
// Should merge with third, except they aren't contiguous...
InstallOperation fourth_op;
fourth_op.set_type(InstallOperation::REPLACE);
*(fourth_op.add_dst_extents()) = ExtentForRange(7, 2);
fourth_op.set_data_length(2 * kBlockSize);
AnnotatedOperation fourth_aop;
fourth_aop.op = fourth_op;
aops.push_back(fourth_aop);
BlobFileWriter blob_file(0, nullptr);
PayloadVersion version(kBrilloMajorPayloadVersion,
kSourceMinorPayloadVersion);
EXPECT_TRUE(ABGenerator::MergeOperations(&aops, version, 4, "", &blob_file));
// No operations were merged, the number of ops is the same.
EXPECT_EQ(4U, aops.size());
}
TEST_F(ABGeneratorTest, AddSourceHashTest) {
vector<AnnotatedOperation> aops;
InstallOperation first_op;
first_op.set_type(InstallOperation::SOURCE_COPY);
first_op.set_src_length(kBlockSize);
*(first_op.add_src_extents()) = ExtentForRange(0, 1);
AnnotatedOperation first_aop;
first_aop.op = first_op;
aops.push_back(first_aop);
InstallOperation second_op;
second_op.set_type(InstallOperation::REPLACE);
AnnotatedOperation second_aop;
second_aop.op = second_op;
aops.push_back(second_aop);
ScopedTempFile src_part_file("AddSourceHashTest_src_part.XXXXXX");
brillo::Blob src_data(kBlockSize);
test_utils::FillWithData(&src_data);
ASSERT_TRUE(test_utils::WriteFileVector(src_part_file.path(), src_data));
EXPECT_TRUE(ABGenerator::AddSourceHash(&aops, src_part_file.path()));
EXPECT_TRUE(aops[0].op.has_src_sha256_hash());
EXPECT_FALSE(aops[1].op.has_src_sha256_hash());
brillo::Blob expected_hash;
EXPECT_TRUE(HashCalculator::RawHashOfData(src_data, &expected_hash));
brillo::Blob result_hash(aops[0].op.src_sha256_hash().begin(),
aops[0].op.src_sha256_hash().end());
EXPECT_EQ(expected_hash, result_hash);
}
} // namespace chromeos_update_engine
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