content/public/test/test_launcher.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/public/test/test_launcher.h"
   6
   7 #include <map>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/command_line.h"
  12 #include "base/containers/hash_tables.h"
  13 #include "base/environment.h"
  14 #include "base/files/file_util.h"
  15 #include "base/files/scoped_temp_dir.h"
  16 #include "base/logging.h"
  17 #include "base/memory/linked_ptr.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/message_loop/message_loop.h"
  20 #include "base/stl_util.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/string_util.h"
  23 #include "base/strings/utf_string_conversions.h"
  24 #include "base/test/launcher/test_launcher.h"
  25 #include "base/test/test_suite.h"
  26 #include "base/test/test_switches.h"
  27 #include "base/test/test_timeouts.h"
  28 #include "base/time/time.h"
  29 #include "content/public/app/content_main.h"
  30 #include "content/public/app/content_main_delegate.h"
  31 #include "content/public/app/startup_helper_win.h"
  32 #include "content/public/common/content_switches.h"
  33 #include "content/public/common/sandbox_init.h"
  34 #include "content/public/test/browser_test.h"
  35 #include "net/base/escape.h"
  36 #include "testing/gtest/include/gtest/gtest.h"
  37
  38 #if defined(OS_WIN)
  39 #include "base/base_switches.h"
  40 #include "content/common/sandbox_win.h"
  41 #include "sandbox/win/src/sandbox_factory.h"
  42 #include "sandbox/win/src/sandbox_types.h"
  43 #elif defined(OS_MACOSX)
  44 #include "base/mac/scoped_nsautorelease_pool.h"
  45 #endif
  46
  47 namespace content {
  48
  49 namespace {
  50
  51 // Tests with this prefix run before the same test without it, and use the same
  52 // profile. i.e. Foo.PRE_Test runs and then Foo.Test. This allows writing tests
  53 // that span browser restarts.
  54 const char kPreTestPrefix[] = "PRE_";
  55
  56 // Manual tests only run when --run-manual is specified. This allows writing
  57 // tests that don't run automatically but are still in the same test binary.
  58 // This is useful so that a team that wants to run a few tests doesn't have to
  59 // add a new binary that must be compiled on all builds.
  60 const char kManualTestPrefix[] = "MANUAL_";
  61
  62 TestLauncherDelegate* g_launcher_delegate;
  63 ContentMainParams* g_params;
  64
  65 std::string RemoveAnyPrePrefixes(const std::string& test_name) {
  66   std::string result(test_name);
  67   base::ReplaceSubstringsAfterOffset(
  68       &result, 0, kPreTestPrefix, base::StringPiece());
  69   return result;
  70 }
  71
  72 void PrintUsage() {
  73   fprintf(stdout,
  74           "Runs tests using the gtest framework, each batch of tests being\n"
  75           "run in their own process. Supported command-line flags:\n"
  76           "\n"
  77           " Common flags:\n"
  78           "  --gtest_filter=...\n"
  79           "    Runs a subset of tests (see --gtest_help for more info).\n"
  80           "\n"
  81           "  --help\n"
  82           "    Shows this message.\n"
  83           "\n"
  84           "  --gtest_help\n"
  85           "    Shows the gtest help message.\n"
  86           "\n"
  87           "  --test-launcher-jobs=N\n"
  88           "    Sets the number of parallel test jobs to N.\n"
  89           "\n"
  90           "  --single_process\n"
  91           "    Runs the tests and the launcher in the same process. Useful\n"
  92           "    for debugging a specific test in a debugger.\n"
  93           "\n"
  94           " Other flags:\n"
  95           "  --test-launcher-retry-limit=N\n"
  96           "    Sets the limit of test retries on failures to N.\n"
  97           "\n"
  98           "  --test-launcher-summary-output=PATH\n"
  99           "    Saves a JSON machine-readable summary of the run.\n"
 100           "\n"
 101           "  --test-launcher-print-test-stdio=auto|always|never\n"
 102           "    Controls when full test output is printed.\n"
 103           "    auto means to print it when the test failed.\n"
 104           "\n"
 105           "  --test-launcher-total-shards=N\n"
 106           "    Sets the total number of shards to N.\n"
 107           "\n"
 108           "  --test-launcher-shard-index=N\n"
 109           "    Sets the shard index to run to N (from 0 to TOTAL - 1).\n");
 110 }
 111
 112 // Implementation of base::TestLauncherDelegate. This is also a test launcher,
 113 // wrapping a lower-level test launcher with content-specific code.
 114 class WrapperTestLauncherDelegate : public base::TestLauncherDelegate {
 115  public:
 116   explicit WrapperTestLauncherDelegate(
 117       content::TestLauncherDelegate* launcher_delegate)
 118       : launcher_delegate_(launcher_delegate) {
 119     CHECK(temp_dir_.CreateUniqueTempDir());
 120   }
 121
 122   // base::TestLauncherDelegate:
 123   bool GetTests(std::vector<base::TestIdentifier>* output) override;
 124   bool ShouldRunTest(const std::string& test_case_name,
 125                      const std::string& test_name) override;
 126   size_t RunTests(base::TestLauncher* test_launcher,
 127                   const std::vector<std::string>& test_names) override;
 128   size_t RetryTests(base::TestLauncher* test_launcher,
 129                     const std::vector<std::string>& test_names) override;
 130
 131  private:
 132   void DoRunTest(base::TestLauncher* test_launcher,
 133                  const std::string& test_name);
 134
 135   // Launches test named |test_name| using parallel launcher,
 136   // given result of PRE_ test |pre_test_result|.
 137   void RunDependentTest(base::TestLauncher* test_launcher,
 138                         const std::string test_name,
 139                         const base::TestResult& pre_test_result);
 140
 141   // Callback to receive result of a test.
 142   void GTestCallback(
 143       base::TestLauncher* test_launcher,
 144       const std::string& test_name,
 145       int exit_code,
 146       const base::TimeDelta& elapsed_time,
 147       bool was_timeout,
 148       const std::string& output);
 149
 150   content::TestLauncherDelegate* launcher_delegate_;
 151
 152   // Store dependent test name (map is indexed by full test name).
 153   typedef std::map<std::string, std::string> DependentTestMap;
 154   DependentTestMap dependent_test_map_;
 155   DependentTestMap reverse_dependent_test_map_;
 156
 157   // Store unique data directory prefix for test names (without PRE_ prefixes).
 158   // PRE_ tests and tests that depend on them must share the same
 159   // data directory. Using test name as directory name leads to too long
 160   // names (exceeding UNIX_PATH_MAX, which creates a problem with
 161   // process_singleton_linux). Create a randomly-named temporary directory
 162   // and keep track of the names so that PRE_ tests can still re-use them.
 163   typedef std::map<std::string, base::FilePath> UserDataDirMap;
 164   UserDataDirMap user_data_dir_map_;
 165
 166   // Store names of all seen tests to properly handle PRE_ tests.
 167   std::set<std::string> all_test_names_;
 168
 169   // Temporary directory for user data directories.
 170   base::ScopedTempDir temp_dir_;
 171
 172   DISALLOW_COPY_AND_ASSIGN(WrapperTestLauncherDelegate);
 173 };
 174
 175 bool WrapperTestLauncherDelegate::GetTests(
 176     std::vector<base::TestIdentifier>* output) {
 177   *output = base::GetCompiledInTests();
 178   return true;
 179 }
 180
 181 bool WrapperTestLauncherDelegate::ShouldRunTest(
 182     const std::string& test_case_name,
 183     const std::string& test_name) {
 184   all_test_names_.insert(test_case_name + "." + test_name);
 185
 186   if (base::StartsWith(test_name, kManualTestPrefix,
 187                        base::CompareCase::SENSITIVE) &&
 188       !base::CommandLine::ForCurrentProcess()->HasSwitch(kRunManualTestsFlag)) {
 189     return false;
 190   }
 191
 192   if (base::StartsWith(test_name, kPreTestPrefix,
 193                        base::CompareCase::SENSITIVE)) {
 194     // We will actually run PRE_ tests, but to ensure they run on the same shard
 195     // as dependent tests, handle all these details internally.
 196     return false;
 197   }
 198
 199   return true;
 200 }
 201
 202 std::string GetPreTestName(const std::string& full_name) {
 203   size_t dot_pos = full_name.find('.');
 204   CHECK_NE(dot_pos, std::string::npos);
 205   std::string test_case_name = full_name.substr(0, dot_pos);
 206   std::string test_name = full_name.substr(dot_pos + 1);
 207   return test_case_name + "." + kPreTestPrefix + test_name;
 208 }
 209
 210 size_t WrapperTestLauncherDelegate::RunTests(
 211     base::TestLauncher* test_launcher,
 212     const std::vector<std::string>& test_names) {
 213   dependent_test_map_.clear();
 214   reverse_dependent_test_map_.clear();
 215   user_data_dir_map_.clear();
 216
 217   // Number of additional tests to run because of dependencies.
 218   size_t additional_tests_to_run_count = 0;
 219
 220   // Compute dependencies of tests to be run.
 221   for (size_t i = 0; i < test_names.size(); i++) {
 222     std::string full_name(test_names[i]);
 223     std::string pre_test_name(GetPreTestName(full_name));
 224
 225     while (ContainsKey(all_test_names_, pre_test_name)) {
 226       additional_tests_to_run_count++;
 227
 228       DCHECK(!ContainsKey(dependent_test_map_, pre_test_name));
 229       dependent_test_map_[pre_test_name] = full_name;
 230
 231       DCHECK(!ContainsKey(reverse_dependent_test_map_, full_name));
 232       reverse_dependent_test_map_[full_name] = pre_test_name;
 233
 234       full_name = pre_test_name;
 235       pre_test_name = GetPreTestName(pre_test_name);
 236     }
 237   }
 238
 239   for (size_t i = 0; i < test_names.size(); i++) {
 240     std::string full_name(test_names[i]);
 241
 242     // Make sure no PRE_ tests were requested explicitly.
 243     DCHECK_EQ(full_name, RemoveAnyPrePrefixes(full_name));
 244
 245     if (!ContainsKey(user_data_dir_map_, full_name)) {
 246       base::FilePath temp_dir;
 247       CHECK(base::CreateTemporaryDirInDir(temp_dir_.path(),
 248                                           FILE_PATH_LITERAL("d"), &temp_dir));
 249       user_data_dir_map_[full_name] = temp_dir;
 250     }
 251
 252     // If the test has any dependencies, get to the root and start with that.
 253     while (ContainsKey(reverse_dependent_test_map_, full_name))
 254       full_name = GetPreTestName(full_name);
 255
 256     DoRunTest(test_launcher, full_name);
 257   }
 258
 259   return test_names.size() + additional_tests_to_run_count;
 260 }
 261
 262 size_t WrapperTestLauncherDelegate::RetryTests(
 263     base::TestLauncher* test_launcher,
 264     const std::vector<std::string>& test_names) {
 265   // List of tests we can kick off right now, depending on no other tests.
 266   std::vector<std::string> tests_to_run_now;
 267
 268   // We retry at least the tests requested to retry.
 269   std::set<std::string> test_names_set(test_names.begin(), test_names.end());
 270
 271   // In the face of PRE_ tests, we need to retry the entire chain of tests,
 272   // from the very first one.
 273   for (size_t i = 0; i < test_names.size(); i++) {
 274     std::string test_name(test_names[i]);
 275     while (ContainsKey(reverse_dependent_test_map_, test_name)) {
 276       test_name = reverse_dependent_test_map_[test_name];
 277       test_names_set.insert(test_name);
 278     }
 279   }
 280
 281   // Discard user data directories from any previous runs. Start with
 282   // fresh state.
 283   for (UserDataDirMap::const_iterator i = user_data_dir_map_.begin();
 284        i != user_data_dir_map_.end();
 285        ++i) {
 286     // Delete temporary directories now to avoid using too much space in /tmp.
 287     if (!base::DeleteFile(i->second, true)) {
 288       LOG(WARNING) << "Failed to delete " << i->second.value();
 289     }
 290   }
 291   user_data_dir_map_.clear();
 292
 293   for (std::set<std::string>::const_iterator i = test_names_set.begin();
 294        i != test_names_set.end();
 295        ++i) {
 296     std::string full_name(*i);
 297
 298     // Make sure PRE_ tests and tests that depend on them share the same
 299     // data directory - based it on the test name without prefixes.
 300     std::string test_name_no_pre(RemoveAnyPrePrefixes(full_name));
 301     if (!ContainsKey(user_data_dir_map_, test_name_no_pre)) {
 302       base::FilePath temp_dir;
 303       CHECK(base::CreateTemporaryDirInDir(temp_dir_.path(),
 304                                           FILE_PATH_LITERAL("d"), &temp_dir));
 305       user_data_dir_map_[test_name_no_pre] = temp_dir;
 306     }
 307
 308     size_t dot_pos = full_name.find('.');
 309     CHECK_NE(dot_pos, std::string::npos);
 310     std::string test_case_name = full_name.substr(0, dot_pos);
 311     std::string test_name = full_name.substr(dot_pos + 1);
 312     std::string pre_test_name(
 313         test_case_name + "." + kPreTestPrefix + test_name);
 314     if (!ContainsKey(test_names_set, pre_test_name))
 315       tests_to_run_now.push_back(full_name);
 316   }
 317
 318   for (size_t i = 0; i < tests_to_run_now.size(); i++)
 319     DoRunTest(test_launcher, tests_to_run_now[i]);
 320
 321   return test_names_set.size();
 322 }
 323
 324 void WrapperTestLauncherDelegate::DoRunTest(base::TestLauncher* test_launcher,
 325                                             const std::string& test_name) {
 326   std::string test_name_no_pre(RemoveAnyPrePrefixes(test_name));
 327
 328   base::CommandLine cmd_line(*base::CommandLine::ForCurrentProcess());
 329   CHECK(launcher_delegate_->AdjustChildProcessCommandLine(
 330             &cmd_line, user_data_dir_map_[test_name_no_pre]));
 331
 332   base::CommandLine new_cmd_line(cmd_line.GetProgram());
 333   base::CommandLine::SwitchMap switches = cmd_line.GetSwitches();
 334
 335   // Strip out gtest_output flag because otherwise we would overwrite results
 336   // of the other tests.
 337   switches.erase(base::kGTestOutputFlag);
 338
 339   for (base::CommandLine::SwitchMap::const_iterator iter = switches.begin();
 340        iter != switches.end(); ++iter) {
 341     new_cmd_line.AppendSwitchNative(iter->first, iter->second);
 342   }
 343
 344   // Always enable disabled tests.  This method is not called with disabled
 345   // tests unless this flag was specified to the browser test executable.
 346   new_cmd_line.AppendSwitch("gtest_also_run_disabled_tests");
 347   new_cmd_line.AppendSwitchASCII("gtest_filter", test_name);
 348   new_cmd_line.AppendSwitch(kSingleProcessTestsFlag);
 349
 350   char* browser_wrapper = getenv("BROWSER_WRAPPER");
 351
 352   test_launcher->LaunchChildGTestProcess(
 353       new_cmd_line,
 354       browser_wrapper ? browser_wrapper : std::string(),
 355       TestTimeouts::action_max_timeout(),
 356       base::TestLauncher::USE_JOB_OBJECTS |
 357           base::TestLauncher::ALLOW_BREAKAWAY_FROM_JOB,
 358       base::Bind(&WrapperTestLauncherDelegate::GTestCallback,
 359                  base::Unretained(this),
 360                  test_launcher,
 361                  test_name));
 362 }
 363
 364 void WrapperTestLauncherDelegate::RunDependentTest(
 365     base::TestLauncher* test_launcher,
 366     const std::string test_name,
 367     const base::TestResult& pre_test_result) {
 368   if (pre_test_result.status == base::TestResult::TEST_SUCCESS) {
 369     // Only run the dependent test if PRE_ test succeeded.
 370     DoRunTest(test_launcher, test_name);
 371   } else {
 372     // Otherwise skip the test.
 373     base::TestResult test_result;
 374     test_result.full_name = test_name;
 375     test_result.status = base::TestResult::TEST_SKIPPED;
 376     test_launcher->OnTestFinished(test_result);
 377
 378     if (ContainsKey(dependent_test_map_, test_name)) {
 379       RunDependentTest(test_launcher,
 380                        dependent_test_map_[test_name],
 381                        test_result);
 382     }
 383   }
 384 }
 385
 386 void WrapperTestLauncherDelegate::GTestCallback(
 387     base::TestLauncher* test_launcher,
 388     const std::string& test_name,
 389     int exit_code,
 390     const base::TimeDelta& elapsed_time,
 391     bool was_timeout,
 392     const std::string& output) {
 393   base::TestResult result;
 394   result.full_name = test_name;
 395
 396   // TODO(phajdan.jr): Recognize crashes.
 397   if (exit_code == 0)
 398     result.status = base::TestResult::TEST_SUCCESS;
 399   else if (was_timeout)
 400     result.status = base::TestResult::TEST_TIMEOUT;
 401   else
 402     result.status = base::TestResult::TEST_FAILURE;
 403
 404   result.elapsed_time = elapsed_time;
 405
 406   result.output_snippet = GetTestOutputSnippet(result, output);
 407
 408   if (ContainsKey(dependent_test_map_, test_name)) {
 409     RunDependentTest(test_launcher, dependent_test_map_[test_name], result);
 410   } else {
 411     // No other tests depend on this, we can delete the temporary directory now.
 412     // Do so to avoid too many temporary files using lots of disk space.
 413     std::string test_name_no_pre(RemoveAnyPrePrefixes(test_name));
 414     if (ContainsKey(user_data_dir_map_, test_name_no_pre)) {
 415       if (!base::DeleteFile(user_data_dir_map_[test_name_no_pre], true)) {
 416         LOG(WARNING) << "Failed to delete "
 417                      << user_data_dir_map_[test_name_no_pre].value();
 418       }
 419       user_data_dir_map_.erase(test_name_no_pre);
 420     }
 421   }
 422
 423   test_launcher->OnTestFinished(result);
 424 }
 425
 426 }  // namespace
 427
 428 const char kHelpFlag[]   = "help";
 429
 430 const char kLaunchAsBrowser[] = "as-browser";
 431
 432 // See kManualTestPrefix above.
 433 const char kRunManualTestsFlag[] = "run-manual";
 434
 435 const char kSingleProcessTestsFlag[]   = "single_process";
 436
 437
 438 TestLauncherDelegate::~TestLauncherDelegate() {
 439 }
 440
 441 int LaunchTests(TestLauncherDelegate* launcher_delegate,
 442                 int default_jobs,
 443                 int argc,
 444                 char** argv) {
 445   DCHECK(!g_launcher_delegate);
 446   g_launcher_delegate = launcher_delegate;
 447
 448   base::CommandLine::Init(argc, argv);
 449   const base::CommandLine* command_line =
 450       base::CommandLine::ForCurrentProcess();
 451
 452   if (command_line->HasSwitch(kHelpFlag)) {
 453     PrintUsage();
 454     return 0;
 455   }
 456
 457   scoped_ptr<ContentMainDelegate> chrome_main_delegate(
 458       launcher_delegate->CreateContentMainDelegate());
 459   ContentMainParams params(chrome_main_delegate.get());
 460
 461 #if defined(OS_WIN)
 462   sandbox::SandboxInterfaceInfo sandbox_info = {0};
 463   InitializeSandboxInfo(&sandbox_info);
 464
 465   params.instance = GetModuleHandle(NULL);
 466   params.sandbox_info = &sandbox_info;
 467 #elif !defined(OS_ANDROID)
 468   params.argc = argc;
 469   params.argv = const_cast<const char**>(argv);
 470 #endif  // defined(OS_WIN)
 471
 472   if (command_line->HasSwitch(kSingleProcessTestsFlag) ||
 473       (command_line->HasSwitch(switches::kSingleProcess) &&
 474        command_line->HasSwitch(base::kGTestFilterFlag)) ||
 475       command_line->HasSwitch(base::kGTestListTestsFlag) ||
 476       command_line->HasSwitch(base::kGTestHelpFlag)) {
 477     g_params = &params;
 478     return launcher_delegate->RunTestSuite(argc, argv);
 479   }
 480
 481 #if !defined(OS_ANDROID)
 482   if (command_line->HasSwitch(switches::kProcessType) ||
 483       command_line->HasSwitch(kLaunchAsBrowser)) {
 484     return ContentMain(params);
 485   }
 486 #endif
 487
 488   base::AtExitManager at_exit;
 489   testing::InitGoogleTest(&argc, argv);
 490   TestTimeouts::Initialize();
 491
 492   fprintf(stdout,
 493       "IMPORTANT DEBUGGING NOTE: each test is run inside its own process.\n"
 494       "For debugging a test inside a debugger, use the\n"
 495       "--gtest_filter=<your_test_name> flag along with either\n"
 496       "--single_process (to run the test in one launcher/browser process) or\n"
 497       "--single-process (to do the above, and also run Chrome in single-"
 498           "process mode).\n");
 499
 500   base::MessageLoopForIO message_loop;
 501
 502   // Allow the |launcher_delegate| to modify |default_jobs|.
 503   launcher_delegate->AdjustDefaultParallelJobs(&default_jobs);
 504
 505   WrapperTestLauncherDelegate delegate(launcher_delegate);
 506   base::TestLauncher launcher(&delegate, default_jobs);
 507   return (launcher.Run() ? 0 : 1);
 508 }
 509
 510 TestLauncherDelegate* GetCurrentTestLauncherDelegate() {
 511   return g_launcher_delegate;
 512 }
 513
 514 ContentMainParams* GetContentMainParams() {
 515   return g_params;
 516 }
 517
 518 }  // namespace content