blob: 206064ba4e132a6ca18cd725f0a4389af5a5871e [file] [log] [blame]
// Copyright 2013 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 "base/test/launcher/test_launcher.h"
#include <stdio.h>
#include <algorithm>
#include <map>
#include <random>
#include <utility>
#include "base/at_exit.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/environment.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/scoped_file.h"
#include "base/format_macros.h"
#include "base/hash.h"
#include "base/lazy_instance.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "base/process/kill.h"
#include "base/process/launch.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/pattern.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringize_macros.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/system/sys_info.h"
#include "base/task/post_task.h"
#include "base/task/task_scheduler/task_scheduler.h"
#include "base/test/gtest_util.h"
#include "base/test/launcher/test_launcher_tracer.h"
#include "base/test/launcher/test_results_tracker.h"
#include "base/test/test_switches.h"
#include "base/test/test_timeouts.h"
#include "base/threading/thread_restrictions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#if defined(OS_POSIX)
#include <fcntl.h>
#include "base/files/file_descriptor_watcher_posix.h"
#endif
#if defined(OS_MACOSX)
#include "base/mac/scoped_nsautorelease_pool.h"
#endif
#if defined(OS_WIN)
#include "base/win/windows_version.h"
#endif
#if defined(OS_FUCHSIA)
#include <lib/fdio/namespace.h>
#include <lib/zx/job.h>
#include "base/atomic_sequence_num.h"
#include "base/base_paths_fuchsia.h"
#include "base/fuchsia/default_job.h"
#include "base/fuchsia/file_utils.h"
#include "base/fuchsia/fuchsia_logging.h"
#include "base/path_service.h"
#endif
namespace base {
// See https://groups.google.com/a/chromium.org/d/msg/chromium-dev/nkdTP7sstSc/uT3FaE_sgkAJ .
using ::operator<<;
// The environment variable name for the total number of test shards.
const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
// The environment variable name for the test shard index.
const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
namespace {
// Global tag for test runs where the results are unreliable for any reason.
const char kUnreliableResultsTag[] = "UNRELIABLE_RESULTS";
// Maximum time of no output after which we print list of processes still
// running. This deliberately doesn't use TestTimeouts (which is otherwise
// a recommended solution), because they can be increased. This would defeat
// the purpose of this timeout, which is 1) to avoid buildbot "no output for
// X seconds" timeout killing the process 2) help communicate status of
// the test launcher to people looking at the output (no output for a long
// time is mysterious and gives no info about what is happening) 3) help
// debugging in case the process hangs anyway.
constexpr TimeDelta kOutputTimeout = TimeDelta::FromSeconds(15);
// Limit of output snippet lines when printing to stdout.
// Avoids flooding the logs with amount of output that gums up
// the infrastructure.
const size_t kOutputSnippetLinesLimit = 5000;
// Limit of output snippet size. Exceeding this limit
// results in truncating the output and failing the test.
const size_t kOutputSnippetBytesLimit = 300 * 1024;
// Limit of seed values for gtest shuffling. Arbitrary, but based on
// gtest's similarly arbitrary choice.
const uint32_t kRandomSeedUpperBound = 100000;
// Set of live launch test processes with corresponding lock (it is allowed
// for callers to launch processes on different threads).
Lock* GetLiveProcessesLock() {
static auto* lock = new Lock;
return lock;
}
std::map<ProcessHandle, CommandLine>* GetLiveProcesses() {
static auto* map = new std::map<ProcessHandle, CommandLine>;
return map;
}
// Performance trace generator.
TestLauncherTracer* GetTestLauncherTracer() {
static auto* tracer = new TestLauncherTracer;
return tracer;
}
// Creates and starts a TaskScheduler with |num_parallel_jobs| dedicated to
// foreground blocking tasks (corresponds to the traits used to launch and wait
// for child processes).
void CreateAndStartTaskScheduler(int num_parallel_jobs) {
// These values are taken from TaskScheduler::StartWithDefaultParams(), which
// is not used directly to allow a custom number of threads in the foreground
// blocking pool.
constexpr int kMaxBackgroundThreads = 1;
constexpr int kMaxBackgroundBlockingThreads = 2;
const int max_foreground_threads =
std::max(1, base::SysInfo::NumberOfProcessors());
constexpr base::TimeDelta kSuggestedReclaimTime =
base::TimeDelta::FromSeconds(30);
base::TaskScheduler::Create("TestLauncher");
base::TaskScheduler::GetInstance()->Start(
{{kMaxBackgroundThreads, kSuggestedReclaimTime},
{kMaxBackgroundBlockingThreads, kSuggestedReclaimTime},
{max_foreground_threads, kSuggestedReclaimTime},
{num_parallel_jobs, kSuggestedReclaimTime}});
}
#if defined(OS_POSIX)
// Self-pipe that makes it possible to do complex shutdown handling
// outside of the signal handler.
int g_shutdown_pipe[2] = { -1, -1 };
void ShutdownPipeSignalHandler(int signal) {
HANDLE_EINTR(write(g_shutdown_pipe[1], "q", 1));
}
void KillSpawnedTestProcesses() {
// Keep the lock until exiting the process to prevent further processes
// from being spawned.
AutoLock lock(*GetLiveProcessesLock());
fprintf(stdout, "Sending SIGTERM to %" PRIuS " child processes... ",
GetLiveProcesses()->size());
fflush(stdout);
for (const auto& pair : *GetLiveProcesses()) {
// Send the signal to entire process group.
kill((-1) * (pair.first), SIGTERM);
}
fprintf(stdout,
"done.\nGiving processes a chance to terminate cleanly... ");
fflush(stdout);
PlatformThread::Sleep(TimeDelta::FromMilliseconds(500));
fprintf(stdout, "done.\n");
fflush(stdout);
fprintf(stdout, "Sending SIGKILL to %" PRIuS " child processes... ",
GetLiveProcesses()->size());
fflush(stdout);
for (const auto& pair : *GetLiveProcesses()) {
// Send the signal to entire process group.
kill((-1) * (pair.first), SIGKILL);
}
fprintf(stdout, "done.\n");
fflush(stdout);
}
#endif // defined(OS_POSIX)
// Parses the environment variable var as an Int32. If it is unset, returns
// true. If it is set, unsets it then converts it to Int32 before
// returning it in |result|. Returns true on success.
bool TakeInt32FromEnvironment(const char* const var, int32_t* result) {
std::unique_ptr<Environment> env(Environment::Create());
std::string str_val;
if (!env->GetVar(var, &str_val))
return true;
if (!env->UnSetVar(var)) {
LOG(ERROR) << "Invalid environment: we could not unset " << var << ".\n";
return false;
}
if (!StringToInt(str_val, result)) {
LOG(ERROR) << "Invalid environment: " << var << " is not an integer.\n";
return false;
}
return true;
}
// Unsets the environment variable |name| and returns true on success.
// Also returns true if the variable just doesn't exist.
bool UnsetEnvironmentVariableIfExists(const std::string& name) {
std::unique_ptr<Environment> env(Environment::Create());
std::string str_val;
if (!env->GetVar(name, &str_val))
return true;
return env->UnSetVar(name);
}
// Returns true if bot mode has been requested, i.e. defaults optimized
// for continuous integration bots. This way developers don't have to remember
// special command-line flags.
bool BotModeEnabled() {
std::unique_ptr<Environment> env(Environment::Create());
return CommandLine::ForCurrentProcess()->HasSwitch(
switches::kTestLauncherBotMode) ||
env->HasVar("CHROMIUM_TEST_LAUNCHER_BOT_MODE");
}
// Returns command line command line after gtest-specific processing
// and applying |wrapper|.
CommandLine PrepareCommandLineForGTest(const CommandLine& command_line,
const std::string& wrapper) {
CommandLine new_command_line(command_line.GetProgram());
CommandLine::SwitchMap switches = command_line.GetSwitches();
// Handled by the launcher process.
switches.erase(kGTestRepeatFlag);
switches.erase(kIsolatedScriptTestRepeatFlag);
switches.erase(kGTestShuffleFlag);
switches.erase(kGTestRandomSeedFlag);
// Don't try to write the final XML report in child processes.
switches.erase(kGTestOutputFlag);
for (CommandLine::SwitchMap::const_iterator iter = switches.begin();
iter != switches.end(); ++iter) {
new_command_line.AppendSwitchNative((*iter).first, (*iter).second);
}
// Prepend wrapper after last CommandLine quasi-copy operation. CommandLine
// does not really support removing switches well, and trying to do that
// on a CommandLine with a wrapper is known to break.
// TODO(phajdan.jr): Give it a try to support CommandLine removing switches.
#if defined(OS_WIN)
new_command_line.PrependWrapper(ASCIIToUTF16(wrapper));
#else
new_command_line.PrependWrapper(wrapper);
#endif
return new_command_line;
}
// Launches a child process using |command_line|. If the child process is still
// running after |timeout|, it is terminated and |*was_timeout| is set to true.
// Returns exit code of the process.
int LaunchChildTestProcessWithOptions(const CommandLine& command_line,
const LaunchOptions& options,
int flags,
TimeDelta timeout,
ProcessLifetimeObserver* observer,
bool* was_timeout) {
TimeTicks start_time(TimeTicks::Now());
#if defined(OS_POSIX)
// Make sure an option we rely on is present - see LaunchChildGTestProcess.
DCHECK(options.new_process_group);
#endif
LaunchOptions new_options(options);
#if defined(OS_WIN)
DCHECK(!new_options.job_handle);
win::ScopedHandle job_handle;
if (flags & TestLauncher::USE_JOB_OBJECTS) {
job_handle.Set(CreateJobObject(NULL, NULL));
if (!job_handle.IsValid()) {
LOG(ERROR) << "Could not create JobObject.";
return -1;
}
DWORD job_flags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;
// Allow break-away from job since sandbox and few other places rely on it
// on Windows versions prior to Windows 8 (which supports nested jobs).
if (win::GetVersion() < win::VERSION_WIN8 &&
flags & TestLauncher::ALLOW_BREAKAWAY_FROM_JOB) {
job_flags |= JOB_OBJECT_LIMIT_BREAKAWAY_OK;
}
if (!SetJobObjectLimitFlags(job_handle.Get(), job_flags)) {
LOG(ERROR) << "Could not SetJobObjectLimitFlags.";
return -1;
}
new_options.job_handle = job_handle.Get();
}
#elif defined(OS_FUCHSIA)
DCHECK(!new_options.job_handle);
// Set the clone policy, deliberately omitting FDIO_SPAWN_CLONE_NAMESPACE so
// that we can install a different /data.
new_options.spawn_flags = FDIO_SPAWN_CLONE_STDIO | FDIO_SPAWN_CLONE_JOB;
const base::FilePath kDataPath("/data");
// Clone all namespace entries from the current process, except /data, which
// is overridden below.
fdio_flat_namespace_t* flat_namespace = nullptr;
zx_status_t result = fdio_ns_export_root(&flat_namespace);
ZX_CHECK(ZX_OK == result, result) << "fdio_ns_export_root";
for (size_t i = 0; i < flat_namespace->count; ++i) {
base::FilePath path(flat_namespace->path[i]);
if (path == kDataPath) {
result = zx_handle_close(flat_namespace->handle[i]);
ZX_CHECK(ZX_OK == result, result) << "zx_handle_close";
} else {
new_options.paths_to_transfer.push_back(
{path, flat_namespace->handle[i]});
}
}
free(flat_namespace);
zx::job job_handle;
result = zx::job::create(*GetDefaultJob(), 0, &job_handle);
ZX_CHECK(ZX_OK == result, result) << "zx_job_create";
new_options.job_handle = job_handle.get();
// Give this test its own isolated /data directory by creating a new temporary
// subdirectory under data (/data/test-$PID) and binding that to /data on the
// child process.
CHECK(base::PathExists(kDataPath));
// Create the test subdirectory with a name that is unique to the child test
// process (qualified by parent PID and an autoincrementing test process
// index).
static base::AtomicSequenceNumber child_launch_index;
base::FilePath nested_data_path = kDataPath.AppendASCII(
base::StringPrintf("test-%" PRIuS "-%d", base::Process::Current().Pid(),
child_launch_index.GetNext()));
CHECK(!base::DirectoryExists(nested_data_path));
CHECK(base::CreateDirectory(nested_data_path));
DCHECK(base::DirectoryExists(nested_data_path));
// Bind the new test subdirectory to /data in the child process' namespace.
new_options.paths_to_transfer.push_back(
{kDataPath, base::fuchsia::GetHandleFromFile(
base::File(nested_data_path,
base::File::FLAG_OPEN | base::File::FLAG_READ |
base::File::FLAG_DELETE_ON_CLOSE))
.release()});
#endif // defined(OS_FUCHSIA)
#if defined(OS_LINUX)
// To prevent accidental privilege sharing to an untrusted child, processes
// are started with PR_SET_NO_NEW_PRIVS. Do not set that here, since this
// new child will be privileged and trusted.
new_options.allow_new_privs = true;
#endif
Process process;
{
// Note how we grab the lock before the process possibly gets created.
// This ensures that when the lock is held, ALL the processes are registered
// in the set.
AutoLock lock(*GetLiveProcessesLock());
#if defined(OS_WIN)
// Allow the handle used to capture stdio and stdout to be inherited by the
// child. Note that this is done under GetLiveProcessesLock() to ensure that
// only the desired child receives the handle.
if (new_options.stdout_handle) {
::SetHandleInformation(new_options.stdout_handle, HANDLE_FLAG_INHERIT,
HANDLE_FLAG_INHERIT);
}
#endif
process = LaunchProcess(command_line, new_options);
#if defined(OS_WIN)
// Revoke inheritance so that the handle isn't leaked into other children.
// Note that this is done under GetLiveProcessesLock() to ensure that only
// the desired child receives the handle.
if (new_options.stdout_handle)
::SetHandleInformation(new_options.stdout_handle, HANDLE_FLAG_INHERIT, 0);
#endif
if (!process.IsValid())
return -1;
// TODO(rvargas) crbug.com/417532: Don't store process handles.
GetLiveProcesses()->insert(std::make_pair(process.Handle(), command_line));
}
if (observer)
observer->OnLaunched(process.Handle(), process.Pid());
int exit_code = 0;
bool did_exit = false;
{
base::ScopedAllowBaseSyncPrimitivesForTesting allow_base_sync_primitives;
did_exit = process.WaitForExitWithTimeout(timeout, &exit_code);
}
if (!did_exit) {
if (observer)
observer->OnTimedOut(command_line);
*was_timeout = true;
exit_code = -1; // Set a non-zero exit code to signal a failure.
{
base::ScopedAllowBaseSyncPrimitivesForTesting allow_base_sync_primitives;
// Ensure that the process terminates.
process.Terminate(-1, true);
}
}
{
// Note how we grab the log before issuing a possibly broad process kill.
// Other code parts that grab the log kill processes, so avoid trying
// to do that twice and trigger all kinds of log messages.
AutoLock lock(*GetLiveProcessesLock());
#if defined(OS_FUCHSIA)
zx_status_t status = job_handle.kill();
ZX_CHECK(status == ZX_OK, status);
// The child process' data dir should have been deleted automatically,
// thanks to the DELETE_ON_CLOSE flag.
DCHECK(!base::DirectoryExists(nested_data_path));
#elif defined(OS_POSIX)
if (exit_code != 0) {
// On POSIX, in case the test does not exit cleanly, either due to a crash
// or due to it timing out, we need to clean up any child processes that
// it might have created. On Windows, child processes are automatically
// cleaned up using JobObjects.
KillProcessGroup(process.Handle());
}
#endif
GetLiveProcesses()->erase(process.Handle());
}
GetTestLauncherTracer()->RecordProcessExecution(
start_time, TimeTicks::Now() - start_time);
return exit_code;
}
void DoLaunchChildTestProcess(
const CommandLine& command_line,
TimeDelta timeout,
const TestLauncher::LaunchOptions& test_launch_options,
bool redirect_stdio,
SingleThreadTaskRunner* task_runner,
std::unique_ptr<ProcessLifetimeObserver> observer) {
TimeTicks start_time = TimeTicks::Now();
ScopedFILE output_file;
FilePath output_filename;
if (redirect_stdio) {
FILE* raw_output_file = CreateAndOpenTemporaryFile(&output_filename);
output_file.reset(raw_output_file);
CHECK(output_file);
}
LaunchOptions options;
#if defined(OS_WIN)
options.inherit_mode = test_launch_options.inherit_mode;
options.handles_to_inherit = test_launch_options.handles_to_inherit;
if (redirect_stdio) {
HANDLE handle =
reinterpret_cast<HANDLE>(_get_osfhandle(_fileno(output_file.get())));
CHECK_NE(INVALID_HANDLE_VALUE, handle);
options.stdin_handle = INVALID_HANDLE_VALUE;
options.stdout_handle = handle;
options.stderr_handle = handle;
// See LaunchOptions.stdout_handle comments for why this compares against
// FILE_TYPE_CHAR.
if (options.inherit_mode == base::LaunchOptions::Inherit::kSpecific &&
GetFileType(handle) != FILE_TYPE_CHAR) {
options.handles_to_inherit.push_back(handle);
}
}
#else // if !defined(OS_WIN)
options.fds_to_remap = test_launch_options.fds_to_remap;
if (redirect_stdio) {
int output_file_fd = fileno(output_file.get());
CHECK_LE(0, output_file_fd);
options.fds_to_remap.push_back(
std::make_pair(output_file_fd, STDOUT_FILENO));
options.fds_to_remap.push_back(
std::make_pair(output_file_fd, STDERR_FILENO));
}
#if !defined(OS_FUCHSIA)
options.new_process_group = true;
#endif
#if defined(OS_LINUX)
options.kill_on_parent_death = true;
#endif
#endif // !defined(OS_WIN)
bool was_timeout = false;
int exit_code = LaunchChildTestProcessWithOptions(
command_line, options, test_launch_options.flags, timeout, observer.get(),
&was_timeout);
std::string output_file_contents;
if (redirect_stdio) {
fflush(output_file.get());
output_file.reset();
// Reading the file can sometimes fail when the process was killed midflight
// (e.g. on test suite timeout): https://crbug.com/826408. Attempt to read
// the output file anyways, but do not crash on failure in this case.
CHECK(ReadFileToString(output_filename, &output_file_contents) ||
exit_code != 0);
if (!DeleteFile(output_filename, false)) {
// This needs to be non-fatal at least for Windows.
LOG(WARNING) << "Failed to delete " << output_filename.AsUTF8Unsafe();
}
}
// Invoke OnCompleted on the thread it was originating from, not on a worker
// pool thread.
task_runner->PostTask(
FROM_HERE,
BindOnce(&ProcessLifetimeObserver::OnCompleted, std::move(observer),
exit_code, TimeTicks::Now() - start_time, was_timeout,
output_file_contents));
}
std::vector<std::string> ExtractTestsFromFilter(const std::string& filter,
bool double_colon_supported) {
std::vector<std::string> tests;
if (double_colon_supported) {
tests =
SplitString(filter, "::", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
}
if (tests.size() <= 1) {
tests =
SplitString(filter, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
}
return tests;
}
} // namespace
const char kGTestBreakOnFailure[] = "gtest_break_on_failure";
const char kGTestFilterFlag[] = "gtest_filter";
const char kGTestFlagfileFlag[] = "gtest_flagfile";
const char kGTestHelpFlag[] = "gtest_help";
const char kGTestListTestsFlag[] = "gtest_list_tests";
const char kGTestRepeatFlag[] = "gtest_repeat";
const char kGTestRunDisabledTestsFlag[] = "gtest_also_run_disabled_tests";
const char kGTestOutputFlag[] = "gtest_output";
const char kGTestShuffleFlag[] = "gtest_shuffle";
const char kGTestRandomSeedFlag[] = "gtest_random_seed";
const char kIsolatedScriptRunDisabledTestsFlag[] =
"isolated-script-test-also-run-disabled-tests";
const char kIsolatedScriptTestFilterFlag[] = "isolated-script-test-filter";
const char kIsolatedScriptTestRepeatFlag[] = "isolated-script-test-repeat";
TestLauncherDelegate::~TestLauncherDelegate() = default;
TestLauncher::LaunchOptions::LaunchOptions() = default;
TestLauncher::LaunchOptions::LaunchOptions(const LaunchOptions& other) =
default;
TestLauncher::LaunchOptions::~LaunchOptions() = default;
TestLauncher::TestLauncher(TestLauncherDelegate* launcher_delegate,
size_t parallel_jobs)
: launcher_delegate_(launcher_delegate),
total_shards_(1),
shard_index_(0),
cycles_(1),
test_found_count_(0),
test_started_count_(0),
test_finished_count_(0),
test_success_count_(0),
test_broken_count_(0),
retry_count_(0),
retry_limit_(0),
force_run_broken_tests_(false),
run_result_(true),
shuffle_(false),
shuffle_seed_(0),
watchdog_timer_(FROM_HERE,
kOutputTimeout,
this,
&TestLauncher::OnOutputTimeout),
parallel_jobs_(parallel_jobs) {}
TestLauncher::~TestLauncher() {
if (base::TaskScheduler::GetInstance()) {
base::TaskScheduler::GetInstance()->Shutdown();
}
}
bool TestLauncher::Run() {
if (!Init())
return false;
// Value of |cycles_| changes after each iteration. Keep track of the
// original value.
int requested_cycles = cycles_;
#if defined(OS_POSIX)
CHECK_EQ(0, pipe(g_shutdown_pipe));
struct sigaction action;
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
action.sa_handler = &ShutdownPipeSignalHandler;
CHECK_EQ(0, sigaction(SIGINT, &action, nullptr));
CHECK_EQ(0, sigaction(SIGQUIT, &action, nullptr));
CHECK_EQ(0, sigaction(SIGTERM, &action, nullptr));
auto controller = base::FileDescriptorWatcher::WatchReadable(
g_shutdown_pipe[0],
base::Bind(&TestLauncher::OnShutdownPipeReadable, Unretained(this)));
#endif // defined(OS_POSIX)
// Start the watchdog timer.
watchdog_timer_.Reset();
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&TestLauncher::RunTestIteration, Unretained(this)));
RunLoop().Run();
if (requested_cycles != 1)
results_tracker_.PrintSummaryOfAllIterations();
MaybeSaveSummaryAsJSON(std::vector<std::string>());
return run_result_;
}
void TestLauncher::LaunchChildGTestProcess(
const CommandLine& command_line,
const std::string& wrapper,
TimeDelta timeout,
const LaunchOptions& options,
std::unique_ptr<ProcessLifetimeObserver> observer) {
DCHECK(thread_checker_.CalledOnValidThread());
// Record the exact command line used to launch the child.
CommandLine new_command_line(
PrepareCommandLineForGTest(command_line, wrapper));
// When running in parallel mode we need to redirect stdio to avoid mixed-up
// output. We also always redirect on the bots to get the test output into
// JSON summary.
bool redirect_stdio = (parallel_jobs_ > 1) || BotModeEnabled();
PostTaskWithTraits(
FROM_HERE, {MayBlock(), TaskShutdownBehavior::BLOCK_SHUTDOWN},
BindOnce(&DoLaunchChildTestProcess, new_command_line, timeout, options,
redirect_stdio, RetainedRef(ThreadTaskRunnerHandle::Get()),
std::move(observer)));
}
void TestLauncher::OnTestFinished(const TestResult& original_result) {
++test_finished_count_;
TestResult result(original_result);
if (result.output_snippet.length() > kOutputSnippetBytesLimit) {
if (result.status == TestResult::TEST_SUCCESS)
result.status = TestResult::TEST_EXCESSIVE_OUTPUT;
// Keep the top and bottom of the log and truncate the middle part.
result.output_snippet =
result.output_snippet.substr(0, kOutputSnippetBytesLimit / 2) + "\n" +
StringPrintf("<truncated (%" PRIuS " bytes)>\n",
result.output_snippet.length()) +
result.output_snippet.substr(result.output_snippet.length() -
kOutputSnippetBytesLimit / 2) +
"\n";
}
bool print_snippet = false;
std::string print_test_stdio("auto");
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kTestLauncherPrintTestStdio)) {
print_test_stdio = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
switches::kTestLauncherPrintTestStdio);
}
if (print_test_stdio == "auto") {
print_snippet = (result.status != TestResult::TEST_SUCCESS);
} else if (print_test_stdio == "always") {
print_snippet = true;
} else if (print_test_stdio == "never") {
print_snippet = false;
} else {
LOG(WARNING) << "Invalid value of " << switches::kTestLauncherPrintTestStdio
<< ": " << print_test_stdio;
}
if (print_snippet) {
std::vector<base::StringPiece> snippet_lines =
SplitStringPiece(result.output_snippet, "\n", base::KEEP_WHITESPACE,
base::SPLIT_WANT_ALL);
if (snippet_lines.size() > kOutputSnippetLinesLimit) {
size_t truncated_size = snippet_lines.size() - kOutputSnippetLinesLimit;
snippet_lines.erase(
snippet_lines.begin(),
snippet_lines.begin() + truncated_size);
snippet_lines.insert(snippet_lines.begin(), "<truncated>");
}
fprintf(stdout, "%s", base::JoinString(snippet_lines, "\n").c_str());
fflush(stdout);
}
if (result.status == TestResult::TEST_SUCCESS) {
++test_success_count_;
} else {
tests_to_retry_.insert(result.full_name);
}
results_tracker_.AddTestResult(result);
// TODO(phajdan.jr): Align counter (padding).
std::string status_line(
StringPrintf("[%" PRIuS "/%" PRIuS "] %s ",
test_finished_count_,
test_started_count_,
result.full_name.c_str()));
if (result.completed()) {
status_line.append(StringPrintf("(%" PRId64 " ms)",
result.elapsed_time.InMilliseconds()));
} else if (result.status == TestResult::TEST_TIMEOUT) {
status_line.append("(TIMED OUT)");
} else if (result.status == TestResult::TEST_CRASH) {
status_line.append("(CRASHED)");
} else if (result.status == TestResult::TEST_SKIPPED) {
status_line.append("(SKIPPED)");
} else if (result.status == TestResult::TEST_UNKNOWN) {
status_line.append("(UNKNOWN)");
} else {
// Fail very loudly so it's not ignored.
CHECK(false) << "Unhandled test result status: " << result.status;
}
fprintf(stdout, "%s\n", status_line.c_str());
fflush(stdout);
// We just printed a status line, reset the watchdog timer.
watchdog_timer_.Reset();
// Do not waste time on timeouts. We include tests with unknown results here
// because sometimes (e.g. hang in between unit tests) that's how a timeout
// gets reported.
if (result.status == TestResult::TEST_TIMEOUT ||
result.status == TestResult::TEST_UNKNOWN) {
test_broken_count_++;
}
size_t broken_threshold =
std::max(static_cast<size_t>(20), test_found_count_ / 10);
if (!force_run_broken_tests_ && test_broken_count_ >= broken_threshold) {
fprintf(stdout, "Too many badly broken tests (%" PRIuS "), exiting now.\n",
test_broken_count_);
fflush(stdout);
#if defined(OS_POSIX)
KillSpawnedTestProcesses();
#endif // defined(OS_POSIX)
MaybeSaveSummaryAsJSON({"BROKEN_TEST_EARLY_EXIT"});
exit(1);
}
if (test_finished_count_ != test_started_count_)
return;
if (tests_to_retry_.empty() || retry_count_ >= retry_limit_) {
OnTestIterationFinished();
return;
}
if (!force_run_broken_tests_ && tests_to_retry_.size() >= broken_threshold) {
fprintf(stdout,
"Too many failing tests (%" PRIuS "), skipping retries.\n",
tests_to_retry_.size());
fflush(stdout);
results_tracker_.AddGlobalTag("BROKEN_TEST_SKIPPED_RETRIES");
OnTestIterationFinished();
return;
}
retry_count_++;
std::vector<std::string> test_names(tests_to_retry_.begin(),
tests_to_retry_.end());
tests_to_retry_.clear();
size_t retry_started_count = launcher_delegate_->RetryTests(this, test_names);
if (retry_started_count == 0) {
// Signal failure, but continue to run all requested test iterations.
// With the summary of all iterations at the end this is a good default.
run_result_ = false;
OnTestIterationFinished();
return;
}
fprintf(stdout, "Retrying %" PRIuS " test%s (retry #%" PRIuS ")\n",
retry_started_count,
retry_started_count > 1 ? "s" : "",
retry_count_);
fflush(stdout);
test_started_count_ += retry_started_count;
}
// Helper used to parse test filter files. Syntax is documented in
// //testing/buildbot/filters/README.md .
bool LoadFilterFile(const FilePath& file_path,
std::vector<std::string>* positive_filter,
std::vector<std::string>* negative_filter) {
std::string file_content;
if (!ReadFileToString(file_path, &file_content)) {
LOG(ERROR) << "Failed to read the filter file.";
return false;
}
std::vector<std::string> filter_lines = SplitString(
file_content, "\n", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
int line_num = 0;
for (const std::string& filter_line : filter_lines) {
line_num++;
size_t hash_pos = filter_line.find('#');
// In case when # symbol is not in the beginning of the line and is not
// proceeded with a space then it's likely that the comment was
// unintentional.
if (hash_pos != std::string::npos && hash_pos > 0 &&
filter_line[hash_pos - 1] != ' ') {
LOG(WARNING) << "Content of line " << line_num << " in " << file_path
<< " after # is treated as a comment, " << filter_line;
}
// Strip comments and whitespace from each line.
std::string trimmed_line =
TrimWhitespaceASCII(filter_line.substr(0, hash_pos), TRIM_ALL)
.as_string();
if (trimmed_line.substr(0, 2) == "//") {
LOG(ERROR) << "Line " << line_num << " in " << file_path
<< " starts with //, use # for comments.";
return false;
}
// Treat a line starting with '//' as a comment.
if (trimmed_line.empty())
continue;
if (trimmed_line[0] == '-')
negative_filter->push_back(trimmed_line.substr(1));
else
positive_filter->push_back(trimmed_line);
}
return true;
}
bool TestLauncher::Init() {
const CommandLine* command_line = CommandLine::ForCurrentProcess();
// Initialize sharding. Command line takes precedence over legacy environment
// variables.
if (command_line->HasSwitch(switches::kTestLauncherTotalShards) &&
command_line->HasSwitch(switches::kTestLauncherShardIndex)) {
if (!StringToInt(
command_line->GetSwitchValueASCII(
switches::kTestLauncherTotalShards),
&total_shards_)) {
LOG(ERROR) << "Invalid value for " << switches::kTestLauncherTotalShards;
return false;
}
if (!StringToInt(
command_line->GetSwitchValueASCII(
switches::kTestLauncherShardIndex),
&shard_index_)) {
LOG(ERROR) << "Invalid value for " << switches::kTestLauncherShardIndex;
return false;
}
fprintf(stdout,
"Using sharding settings from command line. This is shard %d/%d\n",
shard_index_, total_shards_);
fflush(stdout);
} else {
if (!TakeInt32FromEnvironment(kTestTotalShards, &total_shards_))
return false;
if (!TakeInt32FromEnvironment(kTestShardIndex, &shard_index_))
return false;
fprintf(stdout,
"Using sharding settings from environment. This is shard %d/%d\n",
shard_index_, total_shards_);
fflush(stdout);
}
if (shard_index_ < 0 ||
total_shards_ < 0 ||
shard_index_ >= total_shards_) {
LOG(ERROR) << "Invalid sharding settings: we require 0 <= "
<< kTestShardIndex << " < " << kTestTotalShards
<< ", but you have " << kTestShardIndex << "=" << shard_index_
<< ", " << kTestTotalShards << "=" << total_shards_ << ".\n";
return false;
}
// Make sure we don't pass any sharding-related environment to the child
// processes. This test launcher implements the sharding completely.
CHECK(UnsetEnvironmentVariableIfExists("GTEST_TOTAL_SHARDS"));
CHECK(UnsetEnvironmentVariableIfExists("GTEST_SHARD_INDEX"));
if (command_line->HasSwitch(kGTestRepeatFlag) &&
!StringToInt(command_line->GetSwitchValueASCII(kGTestRepeatFlag),
&cycles_)) {
LOG(ERROR) << "Invalid value for " << kGTestRepeatFlag;
return false;
}
if (command_line->HasSwitch(kIsolatedScriptTestRepeatFlag) &&
!StringToInt(
command_line->GetSwitchValueASCII(kIsolatedScriptTestRepeatFlag),
&cycles_)) {
LOG(ERROR) << "Invalid value for " << kIsolatedScriptTestRepeatFlag;
return false;
}
if (command_line->HasSwitch(switches::kTestLauncherRetryLimit)) {
int retry_limit = -1;
if (!StringToInt(command_line->GetSwitchValueASCII(
switches::kTestLauncherRetryLimit), &retry_limit) ||
retry_limit < 0) {
LOG(ERROR) << "Invalid value for " << switches::kTestLauncherRetryLimit;
return false;
}
retry_limit_ = retry_limit;
} else if (command_line->HasSwitch(
switches::kIsolatedScriptTestLauncherRetryLimit)) {
int retry_limit = -1;
if (!StringToInt(command_line->GetSwitchValueASCII(
switches::kIsolatedScriptTestLauncherRetryLimit),
&retry_limit) ||
retry_limit < 0) {
LOG(ERROR) << "Invalid value for "
<< switches::kIsolatedScriptTestLauncherRetryLimit;
return false;
}
retry_limit_ = retry_limit;
} else if (BotModeEnabled() ||
!(command_line->HasSwitch(kGTestFilterFlag) ||
command_line->HasSwitch(kIsolatedScriptTestFilterFlag))) {
// Retry failures 3 times by default if we are running all of the tests or
// in bot mode.
retry_limit_ = 3;
}
if (command_line->HasSwitch(switches::kTestLauncherForceRunBrokenTests))
force_run_broken_tests_ = true;
// Some of the TestLauncherDelegate implementations don't call into gtest
// until they've already split into test-specific processes. This results
// in gtest's native shuffle implementation attempting to shuffle one test.
// Shuffling the list of tests in the test launcher (before the delegate
// gets involved) ensures that the entire shard is shuffled.
if (command_line->HasSwitch(kGTestShuffleFlag)) {
shuffle_ = true;
if (command_line->HasSwitch(kGTestRandomSeedFlag)) {
const std::string custom_seed_str =
command_line->GetSwitchValueASCII(kGTestRandomSeedFlag);
uint32_t custom_seed = 0;
if (!StringToUint(custom_seed_str, &custom_seed)) {
LOG(ERROR) << "Unable to parse seed \"" << custom_seed_str << "\".";
return false;
}
if (custom_seed >= kRandomSeedUpperBound) {
LOG(ERROR) << "Seed " << custom_seed << " outside of expected range "
<< "[0, " << kRandomSeedUpperBound << ")";
return false;
}
shuffle_seed_ = custom_seed;
} else {
std::uniform_int_distribution<uint32_t> dist(0, kRandomSeedUpperBound);
std::random_device random_dev;
shuffle_seed_ = dist(random_dev);
}
} else if (command_line->HasSwitch(kGTestRandomSeedFlag)) {
LOG(ERROR) << kGTestRandomSeedFlag << " requires " << kGTestShuffleFlag;
return false;
}
fprintf(stdout, "Using %" PRIuS " parallel jobs.\n", parallel_jobs_);
fflush(stdout);
CreateAndStartTaskScheduler(static_cast<int>(parallel_jobs_));
std::vector<std::string> positive_file_filter;
std::vector<std::string> positive_gtest_filter;
if (command_line->HasSwitch(switches::kTestLauncherFilterFile)) {
auto filter =
command_line->GetSwitchValueNative(switches::kTestLauncherFilterFile);
for (auto filter_file :
SplitString(filter, FILE_PATH_LITERAL(";"), base::TRIM_WHITESPACE,
base::SPLIT_WANT_ALL)) {
base::FilePath filter_file_path =
base::MakeAbsoluteFilePath(FilePath(filter_file));
if (!LoadFilterFile(filter_file_path, &positive_file_filter,
&negative_test_filter_))
return false;
}
}
// Split --gtest_filter at '-', if there is one, to separate into
// positive filter and negative filter portions.
bool double_colon_supported = !command_line->HasSwitch(kGTestFilterFlag);
std::string filter = command_line->GetSwitchValueASCII(
double_colon_supported ? kIsolatedScriptTestFilterFlag
: kGTestFilterFlag);
size_t dash_pos = filter.find('-');
if (dash_pos == std::string::npos) {
positive_gtest_filter =
ExtractTestsFromFilter(filter, double_colon_supported);
} else {
// Everything up to the dash.
positive_gtest_filter = ExtractTestsFromFilter(filter.substr(0, dash_pos),
double_colon_supported);
// Everything after the dash.
for (std::string pattern : ExtractTestsFromFilter(
filter.substr(dash_pos + 1), double_colon_supported)) {
negative_test_filter_.push_back(pattern);
}
}
if (!launcher_delegate_->GetTests(&tests_)) {
LOG(ERROR) << "Failed to get list of tests.";
return false;
}
CombinePositiveTestFilters(std::move(positive_gtest_filter),
std::move(positive_file_filter));
if (!results_tracker_.Init(*command_line)) {
LOG(ERROR) << "Failed to initialize test results tracker.";
return 1;
}
#if defined(NDEBUG)
results_tracker_.AddGlobalTag("MODE_RELEASE");
#else
results_tracker_.AddGlobalTag("MODE_DEBUG");
#endif
// Operating systems (sorted alphabetically).
// Note that they can deliberately overlap, e.g. OS_LINUX is a subset
// of OS_POSIX.
#if defined(OS_ANDROID)
results_tracker_.AddGlobalTag("OS_ANDROID");
#endif
#if defined(OS_BSD)
results_tracker_.AddGlobalTag("OS_BSD");
#endif
#if defined(OS_FREEBSD)
results_tracker_.AddGlobalTag("OS_FREEBSD");
#endif
#if defined(OS_FUCHSIA)
results_tracker_.AddGlobalTag("OS_FUCHSIA");
#endif
#if defined(OS_IOS)
results_tracker_.AddGlobalTag("OS_IOS");
#endif
#if defined(OS_LINUX)
results_tracker_.AddGlobalTag("OS_LINUX");
#endif
#if defined(OS_MACOSX)
results_tracker_.AddGlobalTag("OS_MACOSX");
#endif
#if defined(OS_NACL)
results_tracker_.AddGlobalTag("OS_NACL");
#endif
#if defined(OS_OPENBSD)
results_tracker_.AddGlobalTag("OS_OPENBSD");
#endif
#if defined(OS_POSIX)
results_tracker_.AddGlobalTag("OS_POSIX");
#endif
#if defined(OS_SOLARIS)
results_tracker_.AddGlobalTag("OS_SOLARIS");
#endif
#if defined(OS_WIN)
results_tracker_.AddGlobalTag("OS_WIN");
#endif
// CPU-related tags.
#if defined(ARCH_CPU_32_BITS)
results_tracker_.AddGlobalTag("CPU_32_BITS");
#endif
#if defined(ARCH_CPU_64_BITS)
results_tracker_.AddGlobalTag("CPU_64_BITS");
#endif
return true;
}
void TestLauncher::CombinePositiveTestFilters(
std::vector<std::string> filter_a,
std::vector<std::string> filter_b) {
has_at_least_one_positive_filter_ = !filter_a.empty() || !filter_b.empty();
if (!has_at_least_one_positive_filter_) {
return;
}
// If two positive filters are present, only run tests that match a pattern
// in both filters.
if (!filter_a.empty() && !filter_b.empty()) {
for (const auto& i : tests_) {
std::string test_name = FormatFullTestName(i.test_case_name, i.test_name);
bool found_a = false;
bool found_b = false;
for (const auto& k : filter_a) {
found_a = found_a || MatchPattern(test_name, k);
}
for (const auto& k : filter_b) {
found_b = found_b || MatchPattern(test_name, k);
}
if (found_a && found_b) {
positive_test_filter_.push_back(test_name);
}
}
} else if (!filter_a.empty()) {
positive_test_filter_ = std::move(filter_a);
} else {
positive_test_filter_ = std::move(filter_b);
}
}
void TestLauncher::RunTests() {
std::vector<std::string> test_names;
const CommandLine* command_line = CommandLine::ForCurrentProcess();
for (const TestIdentifier& test_id : tests_) {
std::string test_name =
FormatFullTestName(test_id.test_case_name, test_id.test_name);
results_tracker_.AddTest(test_name);
if (test_name.find("DISABLED") != std::string::npos) {
results_tracker_.AddDisabledTest(test_name);
// Skip disabled tests unless explicitly requested.
if (!command_line->HasSwitch(kGTestRunDisabledTestsFlag) &&
!command_line->HasSwitch(kIsolatedScriptRunDisabledTestsFlag))
continue;
}
if (!launcher_delegate_->ShouldRunTest(test_id.test_case_name,
test_id.test_name)) {
continue;
}
// Count tests in the binary, before we apply filter and sharding.
test_found_count_++;
std::string test_name_no_disabled =
TestNameWithoutDisabledPrefix(test_name);
// Skip the test that doesn't match the filter (if given).
if (has_at_least_one_positive_filter_) {
bool found = false;
for (auto filter : positive_test_filter_) {
if (MatchPattern(test_name, filter) ||
MatchPattern(test_name_no_disabled, filter)) {
found = true;
break;
}
}
if (!found)
continue;
}
if (!negative_test_filter_.empty()) {
bool excluded = false;
for (auto filter : negative_test_filter_) {
if (MatchPattern(test_name, filter) ||
MatchPattern(test_name_no_disabled, filter)) {
excluded = true;
break;
}
}
if (excluded)
continue;
}
if (Hash(test_name) % total_shards_ != static_cast<uint32_t>(shard_index_))
continue;
// Report test locations after applying all filters, so that we report test
// locations only for those tests that were run as part of this shard.
results_tracker_.AddTestLocation(test_name, test_id.file, test_id.line);
test_names.push_back(test_name);
}
if (shuffle_) {
std::mt19937 randomizer;
randomizer.seed(shuffle_seed_);
std::shuffle(test_names.begin(), test_names.end(), randomizer);
fprintf(stdout, "Randomizing with seed %u\n", shuffle_seed_);
fflush(stdout);
}
// Save an early test summary in case the launcher crashes or gets killed.
results_tracker_.GeneratePlaceholderIteration();
MaybeSaveSummaryAsJSON({"EARLY_SUMMARY"});
test_started_count_ = launcher_delegate_->RunTests(this, test_names);
if (test_started_count_ == 0) {
fprintf(stdout, "0 tests run\n");
fflush(stdout);
// No tests have actually been started, so kick off the next iteration.
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&TestLauncher::RunTestIteration, Unretained(this)));
}
}
void TestLauncher::RunTestIteration() {
const bool stop_on_failure =
CommandLine::ForCurrentProcess()->HasSwitch(kGTestBreakOnFailure);
if (cycles_ == 0 ||
(stop_on_failure && test_success_count_ != test_finished_count_)) {
RunLoop::QuitCurrentWhenIdleDeprecated();
return;
}
// Special value "-1" means "repeat indefinitely".
cycles_ = (cycles_ == -1) ? cycles_ : cycles_ - 1;
test_found_count_ = 0;
test_started_count_ = 0;
test_finished_count_ = 0;
test_success_count_ = 0;
test_broken_count_ = 0;
retry_count_ = 0;
tests_to_retry_.clear();
results_tracker_.OnTestIterationStarting();
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&TestLauncher::RunTests, Unretained(this)));
}
#if defined(OS_POSIX)
// I/O watcher for the reading end of the self-pipe above.
// Terminates any launched child processes and exits the process.
void TestLauncher::OnShutdownPipeReadable() {
fprintf(stdout, "\nCaught signal. Killing spawned test processes...\n");
fflush(stdout);
KillSpawnedTestProcesses();
MaybeSaveSummaryAsJSON({"CAUGHT_TERMINATION_SIGNAL"});
// The signal would normally kill the process, so exit now.
_exit(1);
}
#endif // defined(OS_POSIX)
void TestLauncher::MaybeSaveSummaryAsJSON(
const std::vector<std::string>& additional_tags) {
const CommandLine* command_line = CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kTestLauncherSummaryOutput)) {
FilePath summary_path(command_line->GetSwitchValuePath(
switches::kTestLauncherSummaryOutput));
if (!results_tracker_.SaveSummaryAsJSON(summary_path, additional_tags)) {
LOG(ERROR) << "Failed to save test launcher output summary.";
}
}
if (command_line->HasSwitch(switches::kTestLauncherTrace)) {
FilePath trace_path(
command_line->GetSwitchValuePath(switches::kTestLauncherTrace));
if (!GetTestLauncherTracer()->Dump(trace_path)) {
LOG(ERROR) << "Failed to save test launcher trace.";
}
}
}
void TestLauncher::OnTestIterationFinished() {
TestResultsTracker::TestStatusMap tests_by_status(
results_tracker_.GetTestStatusMapForCurrentIteration());
if (!tests_by_status[TestResult::TEST_UNKNOWN].empty())
results_tracker_.AddGlobalTag(kUnreliableResultsTag);
// When we retry tests, success is determined by having nothing more
// to retry (everything eventually passed), as opposed to having
// no failures at all.
if (tests_to_retry_.empty()) {
fprintf(stdout, "SUCCESS: all tests passed.\n");
fflush(stdout);
} else {
// Signal failure, but continue to run all requested test iterations.
// With the summary of all iterations at the end this is a good default.
run_result_ = false;
}
results_tracker_.PrintSummaryOfCurrentIteration();
// Kick off the next iteration.
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&TestLauncher::RunTestIteration, Unretained(this)));
}
void TestLauncher::OnOutputTimeout() {
DCHECK(thread_checker_.CalledOnValidThread());
AutoLock lock(*GetLiveProcessesLock());
fprintf(stdout, "Still waiting for the following processes to finish:\n");
for (const auto& pair : *GetLiveProcesses()) {
#if defined(OS_WIN)
fwprintf(stdout, L"\t%s\n", pair.second.GetCommandLineString().c_str());
#else
fprintf(stdout, "\t%s\n", pair.second.GetCommandLineString().c_str());
#endif
}
fflush(stdout);
// Arm the timer again - otherwise it would fire only once.
watchdog_timer_.Reset();
}
size_t NumParallelJobs() {
const CommandLine* command_line = CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kTestLauncherJobs)) {
// If the number of test launcher jobs was specified, return that number.
size_t jobs = 0U;
if (!StringToSizeT(
command_line->GetSwitchValueASCII(switches::kTestLauncherJobs),
&jobs) ||
!jobs) {
LOG(ERROR) << "Invalid value for " << switches::kTestLauncherJobs;
return 0U;
}
return jobs;
}
if (!BotModeEnabled() &&
(command_line->HasSwitch(kGTestFilterFlag) ||
command_line->HasSwitch(kIsolatedScriptTestFilterFlag))) {
// Do not run jobs in parallel by default if we are running a subset of
// the tests and if bot mode is off.
return 1U;
}
// Default to the number of processor cores.
return base::checked_cast<size_t>(SysInfo::NumberOfProcessors());
}
std::string GetTestOutputSnippet(const TestResult& result,
const std::string& full_output) {
size_t run_pos = full_output.find(std::string("[ RUN ] ") +
result.full_name);
if (run_pos == std::string::npos)
return std::string();
size_t end_pos = full_output.find(std::string("[ FAILED ] ") +
result.full_name,
run_pos);
// Only clip the snippet to the "OK" message if the test really
// succeeded. It still might have e.g. crashed after printing it.
if (end_pos == std::string::npos &&
result.status == TestResult::TEST_SUCCESS) {
end_pos = full_output.find(std::string("[ OK ] ") +
result.full_name,
run_pos);
}
if (end_pos != std::string::npos) {
size_t newline_pos = full_output.find("\n", end_pos);
if (newline_pos != std::string::npos)
end_pos = newline_pos + 1;
}
std::string snippet(full_output.substr(run_pos));
if (end_pos != std::string::npos)
snippet = full_output.substr(run_pos, end_pos - run_pos);
return snippet;
}
} // namespace base