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72fec6d3708bbdb2d198b75f8f0fb790fabaf607
frameworks_base/cmds/idmap2/tests/IdmapTests.cpp
Mårten Kongstad d7e8a534d0 idmap2: add debug information to idmap file format 
Add a new variable length string to the idmap file format. This string will
hold debug information like fulfilled policies and any warnings triggered while
generating the file.

Bump the idmap version to 3.

Adjust the idmap header definition in ResourceType.h to take the new string
into account.

Example debug info:

  $ idmap2 create \
        --target-apk-path frameworks/base/cmds/idmap2/tests/data/target/target.apk \
        --overlay-apk-path frameworks/base/cmds/idmap2/tests/data/overlay/overlay.apk \
        --idmap-path /tmp/a.idmap \
        --policy public \
        --policy oem

  $ idmap2 dump --idmap-path /tmp/a.idmap
  target apk path  : frameworks/base/cmds/idmap2/tests/data/target/target.apk
  overlay apk path : frameworks/base/cmds/idmap2/tests/data/overlay/overlay.apk
  I fulfilled_policies=oem|public enforce_overlayable=true
  W failed to find resource "integer/not_in_target" in target resources
  0x7f010000 -> 0x7f010000 integer/int1
  0x7f02000c -> 0x7f020000 string/str1
  [...]

  $ idmap2 dump --idmap-path /tmp/a.idmap --verbose
  00000000: 504d4449  magic
  00000004: 00000003  version
  00000008: 76a20829  target crc
  0000000c: c054fb26  overlay crc
  00000010: ........  target path: frameworks/base/cmds/idmap2/tests/data/target/target.apk
  00000110: ........  overlay path: frameworks/base/cmds/idmap2/tests/data/overlay/overlay.apk
  00000210: ........  debug info: ...
  00000294:       7f  target package id
  00000295:       7f  overlay package id
  [...]

Also, tell cpplint to accept non-const references as function parameters:
they make more sense as out-parameters than pointers that are assumed to
be non-null.

Also, switch to regular expressions in the RawPrintVisitorTests: no more
manual fixups of the stream offsets! Tell cpplint that the <regex>
header is OK to use.

Bug: 140790707
Test: idmap2_tests
Change-Id: Ib94684a3b4001240321801e21af8e132fbcf6609
2019-12-19 16:51:51 +00:00

458 lines
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/*
* Copyright (C) 2018 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 <cstdio> // fclose
#include <fstream>
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "TestHelpers.h"
#include "android-base/macros.h"
#include "androidfw/ApkAssets.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "idmap2/BinaryStreamVisitor.h"
#include "idmap2/CommandLineOptions.h"
#include "idmap2/Idmap.h"
#include "idmap2/LogInfo.h"
using android::Res_value;
using ::testing::IsNull;
using ::testing::NotNull;
namespace android::idmap2 {
#define ASSERT_TARGET_ENTRY(entry, target_resid, type, value) \
ASSERT_EQ(entry.target_id, target_resid); \
ASSERT_EQ(entry.data_type, type); \
ASSERT_EQ(entry.data_value, value)
#define ASSERT_OVERLAY_ENTRY(entry, overlay_resid, target_resid) \
ASSERT_EQ(entry.overlay_id, overlay_resid); \
ASSERT_EQ(entry.target_id, target_resid)
TEST(IdmapTests, TestCanonicalIdmapPathFor) {
ASSERT_EQ(Idmap::CanonicalIdmapPathFor("/foo", "/vendor/overlay/bar.apk"),
"/foo/vendor@overlay@bar.apk@idmap");
}
TEST(IdmapTests, CreateIdmapHeaderFromBinaryStream) {
std::string raw(reinterpret_cast<const char*>(idmap_raw_data), idmap_raw_data_len);
std::istringstream stream(raw);
std::unique_ptr<const IdmapHeader> header = IdmapHeader::FromBinaryStream(stream);
ASSERT_THAT(header, NotNull());
ASSERT_EQ(header->GetMagic(), 0x504d4449U);
ASSERT_EQ(header->GetVersion(), 0x03U);
ASSERT_EQ(header->GetTargetCrc(), 0x1234U);
ASSERT_EQ(header->GetOverlayCrc(), 0x5678U);
ASSERT_EQ(header->GetTargetPath().to_string(), "targetX.apk");
ASSERT_EQ(header->GetOverlayPath().to_string(), "overlayX.apk");
ASSERT_EQ(header->GetDebugInfo(), "debug");
}
TEST(IdmapTests, FailToCreateIdmapHeaderFromBinaryStreamIfPathTooLong) {
std::string raw(reinterpret_cast<const char*>(idmap_raw_data), idmap_raw_data_len);
// overwrite the target path string, including the terminating null, with '.'
for (size_t i = 0x10; i < 0x110; i++) {
raw[i] = '.';
}
std::istringstream stream(raw);
std::unique_ptr<const IdmapHeader> header = IdmapHeader::FromBinaryStream(stream);
ASSERT_THAT(header, IsNull());
}
TEST(IdmapTests, CreateIdmapDataHeaderFromBinaryStream) {
const size_t offset = 0x21c;
std::string raw(reinterpret_cast<const char*>(idmap_raw_data + offset),
idmap_raw_data_len - offset);
std::istringstream stream(raw);
std::unique_ptr<const IdmapData::Header> header = IdmapData::Header::FromBinaryStream(stream);
ASSERT_THAT(header, NotNull());
ASSERT_EQ(header->GetTargetEntryCount(), 0x03);
ASSERT_EQ(header->GetOverlayEntryCount(), 0x03);
}
TEST(IdmapTests, CreateIdmapDataFromBinaryStream) {
const size_t offset = 0x21c;
std::string raw(reinterpret_cast<const char*>(idmap_raw_data + offset),
idmap_raw_data_len - offset);
std::istringstream stream(raw);
std::unique_ptr<const IdmapData> data = IdmapData::FromBinaryStream(stream);
ASSERT_THAT(data, NotNull());
const auto& target_entries = data->GetTargetEntries();
ASSERT_EQ(target_entries.size(), 3U);
ASSERT_TARGET_ENTRY(target_entries[0], 0x7f020000, 0x01 /* Res_value::TYPE_REFERENCE */,
0x7f020000);
ASSERT_TARGET_ENTRY(target_entries[1], 0x7f030000, 0x01 /* Res_value::TYPE_REFERENCE */,
0x7f030000);
ASSERT_TARGET_ENTRY(target_entries[2], 0x7f030002, 0x01 /* Res_value::TYPE_REFERENCE */,
0x7f030001);
const auto& overlay_entries = data->GetOverlayEntries();
ASSERT_EQ(target_entries.size(), 3U);
ASSERT_OVERLAY_ENTRY(overlay_entries[0], 0x7f020000, 0x7f020000);
ASSERT_OVERLAY_ENTRY(overlay_entries[1], 0x7f030000, 0x7f030000);
ASSERT_OVERLAY_ENTRY(overlay_entries[2], 0x7f030001, 0x7f030002);
}
TEST(IdmapTests, CreateIdmapFromBinaryStream) {
std::string raw(reinterpret_cast<const char*>(idmap_raw_data), idmap_raw_data_len);
std::istringstream stream(raw);
auto result = Idmap::FromBinaryStream(stream);
ASSERT_TRUE(result);
const auto idmap = std::move(*result);
ASSERT_THAT(idmap->GetHeader(), NotNull());
ASSERT_EQ(idmap->GetHeader()->GetMagic(), 0x504d4449U);
ASSERT_EQ(idmap->GetHeader()->GetVersion(), 0x03U);
ASSERT_EQ(idmap->GetHeader()->GetTargetCrc(), 0x1234U);
ASSERT_EQ(idmap->GetHeader()->GetOverlayCrc(), 0x5678U);
ASSERT_EQ(idmap->GetHeader()->GetTargetPath().to_string(), "targetX.apk");
ASSERT_EQ(idmap->GetHeader()->GetOverlayPath().to_string(), "overlayX.apk");
const std::vector<std::unique_ptr<const IdmapData>>& dataBlocks = idmap->GetData();
ASSERT_EQ(dataBlocks.size(), 1U);
const std::unique_ptr<const IdmapData>& data = dataBlocks[0];
ASSERT_THAT(data, NotNull());
const auto& target_entries = data->GetTargetEntries();
ASSERT_EQ(target_entries.size(), 3U);
ASSERT_TARGET_ENTRY(target_entries[0], 0x7f020000, Res_value::TYPE_REFERENCE, 0x7f020000);
ASSERT_TARGET_ENTRY(target_entries[1], 0x7f030000, Res_value::TYPE_REFERENCE, 0x7f030000);
ASSERT_TARGET_ENTRY(target_entries[2], 0x7f030002, Res_value::TYPE_REFERENCE, 0x7f030001);
const auto& overlay_entries = data->GetOverlayEntries();
ASSERT_EQ(target_entries.size(), 3U);
ASSERT_OVERLAY_ENTRY(overlay_entries[0], 0x7f020000, 0x7f020000);
ASSERT_OVERLAY_ENTRY(overlay_entries[1], 0x7f030000, 0x7f030000);
ASSERT_OVERLAY_ENTRY(overlay_entries[2], 0x7f030001, 0x7f030002);
}
TEST(IdmapTests, GracefullyFailToCreateIdmapFromCorruptBinaryStream) {
std::string raw(reinterpret_cast<const char*>(idmap_raw_data),
10); // data too small
std::istringstream stream(raw);
const auto result = Idmap::FromBinaryStream(stream);
ASSERT_FALSE(result);
}
TEST(IdmapTests, CreateIdmapHeaderFromApkAssets) {
std::string target_apk_path = GetTestDataPath() + "/target/target.apk";
std::string overlay_apk_path = GetTestDataPath() + "/overlay/overlay.apk";
std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
ASSERT_THAT(target_apk, NotNull());
std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
ASSERT_THAT(overlay_apk, NotNull());
auto idmap_result = Idmap::FromApkAssets(*target_apk, *overlay_apk, PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ true);
ASSERT_TRUE(idmap_result) << idmap_result.GetErrorMessage();
auto& idmap = *idmap_result;
ASSERT_THAT(idmap, NotNull());
ASSERT_THAT(idmap->GetHeader(), NotNull());
ASSERT_EQ(idmap->GetHeader()->GetMagic(), 0x504d4449U);
ASSERT_EQ(idmap->GetHeader()->GetVersion(), 0x03U);
ASSERT_EQ(idmap->GetHeader()->GetTargetCrc(), 0x76a20829);
ASSERT_EQ(idmap->GetHeader()->GetOverlayCrc(), 0xc054fb26);
ASSERT_EQ(idmap->GetHeader()->GetTargetPath().to_string(), target_apk_path);
ASSERT_EQ(idmap->GetHeader()->GetOverlayPath(), overlay_apk_path);
}
Result<std::unique_ptr<const IdmapData>> TestIdmapDataFromApkAssets(
const android::StringPiece& local_target_apk_path,
const android::StringPiece& local_overlay_apk_path, const OverlayManifestInfo& overlay_info,
const PolicyBitmask& fulfilled_policies, bool enforce_overlayable) {
const std::string target_apk_path(GetTestDataPath() + local_target_apk_path.data());
std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
if (!target_apk) {
return Error(R"(Failed to load target apk "%s")", target_apk_path.data());
}
const std::string overlay_apk_path(GetTestDataPath() + local_overlay_apk_path.data());
std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
if (!overlay_apk) {
return Error(R"(Failed to load overlay apk "%s")", overlay_apk_path.data());
}
LogInfo log_info;
auto mapping = ResourceMapping::FromApkAssets(*target_apk, *overlay_apk, overlay_info,
fulfilled_policies, enforce_overlayable, log_info);
if (!mapping) {
return mapping.GetError();
}
return IdmapData::FromResourceMapping(*mapping);
}
TEST(IdmapTests, CreateIdmapDataFromApkAssets) {
std::string target_apk_path = GetTestDataPath() + "/target/target.apk";
std::string overlay_apk_path = GetTestDataPath() + "/overlay/overlay.apk";
std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
ASSERT_THAT(target_apk, NotNull());
std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
ASSERT_THAT(overlay_apk, NotNull());
auto idmap_result = Idmap::FromApkAssets(*target_apk, *overlay_apk, PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ true);
ASSERT_TRUE(idmap_result) << idmap_result.GetErrorMessage();
auto& idmap = *idmap_result;
ASSERT_THAT(idmap, NotNull());
const std::vector<std::unique_ptr<const IdmapData>>& dataBlocks = idmap->GetData();
ASSERT_EQ(dataBlocks.size(), 1U);
const std::unique_ptr<const IdmapData>& data = dataBlocks[0];
ASSERT_THAT(data, NotNull());
const auto& target_entries = data->GetTargetEntries();
ASSERT_EQ(target_entries.size(), 4U);
ASSERT_TARGET_ENTRY(target_entries[0], 0x7f010000, Res_value::TYPE_DYNAMIC_REFERENCE, 0x7f010000);
ASSERT_TARGET_ENTRY(target_entries[1], 0x7f02000c, Res_value::TYPE_DYNAMIC_REFERENCE, 0x7f020000);
ASSERT_TARGET_ENTRY(target_entries[2], 0x7f02000e, Res_value::TYPE_DYNAMIC_REFERENCE, 0x7f020001);
ASSERT_TARGET_ENTRY(target_entries[3], 0x7f02000f, Res_value::TYPE_DYNAMIC_REFERENCE, 0x7f020002);
const auto& overlay_entries = data->GetOverlayEntries();
ASSERT_EQ(target_entries.size(), 4U);
ASSERT_OVERLAY_ENTRY(overlay_entries[0], 0x7f010000, 0x7f010000);
ASSERT_OVERLAY_ENTRY(overlay_entries[1], 0x7f020000, 0x7f02000c);
ASSERT_OVERLAY_ENTRY(overlay_entries[2], 0x7f020001, 0x7f02000e);
ASSERT_OVERLAY_ENTRY(overlay_entries[3], 0x7f020002, 0x7f02000f);
}
TEST(IdmapTests, CreateIdmapDataDoNotRewriteNonOverlayResourceId) {
OverlayManifestInfo info{};
info.target_package = "test.target";
info.target_name = "TestResources";
info.resource_mapping = 0x7f030001; // xml/overlays_different_packages
auto idmap_data = TestIdmapDataFromApkAssets("/target/target.apk", "/overlay/overlay.apk", info,
PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ false);
ASSERT_TRUE(idmap_data) << idmap_data.GetErrorMessage();
auto& data = *idmap_data;
const auto& target_entries = data->GetTargetEntries();
ASSERT_EQ(target_entries.size(), 2U);
ASSERT_TARGET_ENTRY(target_entries[0], 0x7f02000c, Res_value::TYPE_REFERENCE,
0x0104000a); // string/str1 -> android:string/ok
ASSERT_TARGET_ENTRY(target_entries[1], 0x7f02000e, Res_value::TYPE_DYNAMIC_REFERENCE,
0x7f020001); // string/str3 -> string/str4
const auto& overlay_entries = data->GetOverlayEntries();
ASSERT_EQ(overlay_entries.size(), 1U);
ASSERT_OVERLAY_ENTRY(overlay_entries[0], 0x7f020001, 0x7f02000e); // string/str3 <- string/str4
}
TEST(IdmapTests, CreateIdmapDataInlineResources) {
OverlayManifestInfo info{};
info.target_package = "test.target";
info.target_name = "TestResources";
info.resource_mapping = 0x7f030002; // xml/overlays_inline
auto idmap_data = TestIdmapDataFromApkAssets("/target/target.apk", "/overlay/overlay.apk", info,
PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ false);
ASSERT_TRUE(idmap_data) << idmap_data.GetErrorMessage();
auto& data = *idmap_data;
constexpr size_t overlay_string_pool_size = 8U;
const auto& target_entries = data->GetTargetEntries();
ASSERT_EQ(target_entries.size(), 2U);
ASSERT_TARGET_ENTRY(target_entries[0], 0x7f010000, Res_value::TYPE_INT_DEC,
73U); // integer/int1 -> 73
ASSERT_TARGET_ENTRY(target_entries[1], 0x7f02000c, Res_value::TYPE_STRING,
overlay_string_pool_size + 0U); // string/str1 -> "Hello World"
const auto& overlay_entries = data->GetOverlayEntries();
ASSERT_EQ(overlay_entries.size(), 0U);
}
TEST(IdmapTests, FailToCreateIdmapFromApkAssetsIfPathTooLong) {
std::string target_apk_path(GetTestDataPath());
for (int i = 0; i < 32; i++) {
target_apk_path += "/target/../";
}
target_apk_path += "/target/target.apk";
ASSERT_GT(target_apk_path.size(), kIdmapStringLength);
std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
ASSERT_THAT(target_apk, NotNull());
const std::string overlay_apk_path(GetTestDataPath() + "/overlay/overlay.apk");
std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
ASSERT_THAT(overlay_apk, NotNull());
const auto result = Idmap::FromApkAssets(*target_apk, *overlay_apk, PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ true);
ASSERT_FALSE(result);
}
TEST(IdmapTests, IdmapHeaderIsUpToDate) {
fclose(stderr); // silence expected warnings from libandroidfw
const std::string target_apk_path(GetTestDataPath() + "/target/target.apk");
std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
ASSERT_THAT(target_apk, NotNull());
const std::string overlay_apk_path(GetTestDataPath() + "/overlay/overlay.apk");
std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
ASSERT_THAT(overlay_apk, NotNull());
auto result = Idmap::FromApkAssets(*target_apk, *overlay_apk, PolicyFlags::POLICY_PUBLIC,
/* enforce_overlayable */ true);
ASSERT_TRUE(result);
const auto idmap = std::move(*result);
std::stringstream stream;
BinaryStreamVisitor visitor(stream);
idmap->accept(&visitor);
std::unique_ptr<const IdmapHeader> header = IdmapHeader::FromBinaryStream(stream);
ASSERT_THAT(header, NotNull());
ASSERT_TRUE(header->IsUpToDate());
// magic: bytes (0x0, 0x03)
std::string bad_magic_string(stream.str());
bad_magic_string[0x0] = '.';
bad_magic_string[0x1] = '.';
bad_magic_string[0x2] = '.';
bad_magic_string[0x3] = '.';
std::stringstream bad_magic_stream(bad_magic_string);
std::unique_ptr<const IdmapHeader> bad_magic_header =
IdmapHeader::FromBinaryStream(bad_magic_stream);
ASSERT_THAT(bad_magic_header, NotNull());
ASSERT_NE(header->GetMagic(), bad_magic_header->GetMagic());
ASSERT_FALSE(bad_magic_header->IsUpToDate());
// version: bytes (0x4, 0x07)
std::string bad_version_string(stream.str());
bad_version_string[0x4] = '.';
bad_version_string[0x5] = '.';
bad_version_string[0x6] = '.';
bad_version_string[0x7] = '.';
std::stringstream bad_version_stream(bad_version_string);
std::unique_ptr<const IdmapHeader> bad_version_header =
IdmapHeader::FromBinaryStream(bad_version_stream);
ASSERT_THAT(bad_version_header, NotNull());
ASSERT_NE(header->GetVersion(), bad_version_header->GetVersion());
ASSERT_FALSE(bad_version_header->IsUpToDate());
// target crc: bytes (0x8, 0xb)
std::string bad_target_crc_string(stream.str());
bad_target_crc_string[0x8] = '.';
bad_target_crc_string[0x9] = '.';
bad_target_crc_string[0xa] = '.';
bad_target_crc_string[0xb] = '.';
std::stringstream bad_target_crc_stream(bad_target_crc_string);
std::unique_ptr<const IdmapHeader> bad_target_crc_header =
IdmapHeader::FromBinaryStream(bad_target_crc_stream);
ASSERT_THAT(bad_target_crc_header, NotNull());
ASSERT_NE(header->GetTargetCrc(), bad_target_crc_header->GetTargetCrc());
ASSERT_FALSE(bad_target_crc_header->IsUpToDate());
// overlay crc: bytes (0xc, 0xf)
std::string bad_overlay_crc_string(stream.str());
bad_overlay_crc_string[0xc] = '.';
bad_overlay_crc_string[0xd] = '.';
bad_overlay_crc_string[0xe] = '.';
bad_overlay_crc_string[0xf] = '.';
std::stringstream bad_overlay_crc_stream(bad_overlay_crc_string);
std::unique_ptr<const IdmapHeader> bad_overlay_crc_header =
IdmapHeader::FromBinaryStream(bad_overlay_crc_stream);
ASSERT_THAT(bad_overlay_crc_header, NotNull());
ASSERT_NE(header->GetOverlayCrc(), bad_overlay_crc_header->GetOverlayCrc());
ASSERT_FALSE(bad_overlay_crc_header->IsUpToDate());
// target path: bytes (0x10, 0x10f)
std::string bad_target_path_string(stream.str());
bad_target_path_string[0x10] = '\0';
std::stringstream bad_target_path_stream(bad_target_path_string);
std::unique_ptr<const IdmapHeader> bad_target_path_header =
IdmapHeader::FromBinaryStream(bad_target_path_stream);
ASSERT_THAT(bad_target_path_header, NotNull());
ASSERT_NE(header->GetTargetPath(), bad_target_path_header->GetTargetPath());
ASSERT_FALSE(bad_target_path_header->IsUpToDate());
// overlay path: bytes (0x110, 0x20f)
std::string bad_overlay_path_string(stream.str());
bad_overlay_path_string[0x110] = '\0';
std::stringstream bad_overlay_path_stream(bad_overlay_path_string);
std::unique_ptr<const IdmapHeader> bad_overlay_path_header =
IdmapHeader::FromBinaryStream(bad_overlay_path_stream);
ASSERT_THAT(bad_overlay_path_header, NotNull());
ASSERT_NE(header->GetOverlayPath(), bad_overlay_path_header->GetOverlayPath());
ASSERT_FALSE(bad_overlay_path_header->IsUpToDate());
}
class TestVisitor : public Visitor {
public:
explicit TestVisitor(std::ostream& stream) : stream_(stream) {
}
void visit(const Idmap& idmap ATTRIBUTE_UNUSED) override {
stream_ << "TestVisitor::visit(Idmap)" << std::endl;
}
void visit(const IdmapHeader& idmap ATTRIBUTE_UNUSED) override {
stream_ << "TestVisitor::visit(IdmapHeader)" << std::endl;
}
void visit(const IdmapData& idmap ATTRIBUTE_UNUSED) override {
stream_ << "TestVisitor::visit(IdmapData)" << std::endl;
}
void visit(const IdmapData::Header& idmap ATTRIBUTE_UNUSED) override {
stream_ << "TestVisitor::visit(IdmapData::Header)" << std::endl;
}
private:
std::ostream& stream_;
};
TEST(IdmapTests, TestVisitor) {
std::string raw(reinterpret_cast<const char*>(idmap_raw_data), idmap_raw_data_len);
std::istringstream stream(raw);
const auto idmap = Idmap::FromBinaryStream(stream);
ASSERT_TRUE(idmap);
std::stringstream test_stream;
TestVisitor visitor(test_stream);
(*idmap)->accept(&visitor);
ASSERT_EQ(test_stream.str(),
"TestVisitor::visit(IdmapHeader)\n"
"TestVisitor::visit(Idmap)\n"
"TestVisitor::visit(IdmapData::Header)\n"
"TestVisitor::visit(IdmapData)\n");
}
} // namespace android::idmap2
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