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Issue 8036044: Add (not yet working) content_browsertests target. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 2 months ago
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1 // Copyright (c) 2011 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 <string>
6 #include <vector>
7
8 #include "base/command_line.h"
9 #include "base/environment.h"
10 #include "base/file_util.h"
11 #include "base/hash_tables.h"
12 #include "base/logging.h"
13 #include "base/mac/scoped_nsautorelease_pool.h"
14 #include "base/memory/linked_ptr.h"
15 #include "base/memory/scoped_ptr.h"
16 #include "base/process_util.h"
17 #include "base/scoped_temp_dir.h"
18 #include "base/string_number_conversions.h"
19 #include "base/string_util.h"
20 #include "base/test/test_suite.h"
21 #include "base/test/test_timeouts.h"
22 #include "base/time.h"
23 #include "base/utf_string_conversions.h"
24 #include "chrome/common/chrome_switches.h"
25 #include "chrome/test/base/chrome_test_suite.h"
26 #include "chrome/test/base/in_process_browser_test.h"
27 #include "chrome/test/base/test_launcher_utils.h"
28 #include "net/base/escape.h"
29 #include "testing/gtest/include/gtest/gtest.h"
30
31 #if defined(OS_WIN)
32 #include "base/base_switches.h"
33 #include "chrome/common/chrome_constants.h"
34 #include "content/common/sandbox_policy.h"
35 #include "sandbox/src/dep.h"
36 #include "sandbox/src/sandbox_factory.h"
37 #include "sandbox/src/sandbox_types.h"
38 #endif // defined(OS_WIN)
39
40 #if defined(OS_MACOSX)
41 #include "chrome/browser/chrome_browser_application_mac.h"
42 #endif // defined(OS_MACOSX)
43
44 #if defined(OS_WIN)
45 // The entry point signature of chrome.dll.
46 typedef int (*DLL_MAIN)(HINSTANCE, sandbox::SandboxInterfaceInfo*, wchar_t*);
47 #endif // defined(OS_WIN)
48
49 namespace {
50
51 const char kGTestFilterFlag[] = "gtest_filter";
52 const char kGTestHelpFlag[] = "gtest_help";
53 const char kGTestListTestsFlag[] = "gtest_list_tests";
54 const char kGTestRepeatFlag[] = "gtest_repeat";
55 const char kGTestRunDisabledTestsFlag[] = "gtest_also_run_disabled_tests";
56 const char kGTestOutputFlag[] = "gtest_output";
57
58 const char kSingleProcessTestsFlag[] = "single_process";
59 const char kSingleProcessTestsAndChromeFlag[] = "single-process";
60 // The following is kept for historical reasons (so people that are used to
61 // using it don't get surprised).
62 const char kChildProcessFlag[] = "child";
63
64 const char kHelpFlag[] = "help";
65
66 // The environment variable name for the total number of test shards.
67 static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
68 // The environment variable name for the test shard index.
69 static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
70
71 // The default output file for XML output.
72 static const FilePath::CharType kDefaultOutputFile[] = FILE_PATH_LITERAL(
73 "test_detail.xml");
74
75 // Name of the empty test below.
76 static const char kEmptyTestName[] = "InProcessBrowserTest.Empty";
77
78 // An empty test (it starts up and shuts down the browser as part of its
79 // setup and teardown) used to prefetch all of the browser code into memory.
80 IN_PROC_BROWSER_TEST_F(InProcessBrowserTest, Empty) {
81 }
82
83 // Parses the environment variable var as an Int32. If it is unset, returns
84 // default_val. If it is set, unsets it then converts it to Int32 before
85 // returning it. If unsetting or converting to an Int32 fails, print an
86 // error and exit with failure.
87 int32 Int32FromEnvOrDie(const char* const var, int32 default_val) {
88 scoped_ptr<base::Environment> env(base::Environment::Create());
89 std::string str_val;
90 int32 result;
91 if (!env->GetVar(var, &str_val))
92 return default_val;
93 if (!env->UnSetVar(var)) {
94 LOG(ERROR) << "Invalid environment: we could not unset " << var << ".\n";
95 exit(EXIT_FAILURE);
96 }
97 if (!base::StringToInt(str_val, &result)) {
98 LOG(ERROR) << "Invalid environment: " << var << " is not an integer.\n";
99 exit(EXIT_FAILURE);
100 }
101 return result;
102 }
103
104 // Checks whether sharding is enabled by examining the relevant
105 // environment variable values. If the variables are present,
106 // but inconsistent (i.e., shard_index >= total_shards), prints
107 // an error and exits.
108 bool ShouldShard(int32* total_shards, int32* shard_index) {
109 *total_shards = Int32FromEnvOrDie(kTestTotalShards, -1);
110 *shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
111
112 if (*total_shards == -1 && *shard_index == -1) {
113 return false;
114 } else if (*total_shards == -1 && *shard_index != -1) {
115 LOG(ERROR) << "Invalid environment variables: you have "
116 << kTestShardIndex << " = " << *shard_index
117 << ", but have left " << kTestTotalShards << " unset.\n";
118 exit(EXIT_FAILURE);
119 } else if (*total_shards != -1 && *shard_index == -1) {
120 LOG(ERROR) << "Invalid environment variables: you have "
121 << kTestTotalShards << " = " << *total_shards
122 << ", but have left " << kTestShardIndex << " unset.\n";
123 exit(EXIT_FAILURE);
124 } else if (*shard_index < 0 || *shard_index >= *total_shards) {
125 LOG(ERROR) << "Invalid environment variables: we require 0 <= "
126 << kTestShardIndex << " < " << kTestTotalShards
127 << ", but you have " << kTestShardIndex << "=" << *shard_index
128 << ", " << kTestTotalShards << "=" << *total_shards << ".\n";
129 exit(EXIT_FAILURE);
130 }
131
132 return *total_shards > 1;
133 }
134
135 // Given the total number of shards, the shard index, and the test id, returns
136 // true iff the test should be run on this shard. The test id is some arbitrary
137 // but unique non-negative integer assigned by this launcher to each test
138 // method. Assumes that 0 <= shard_index < total_shards, which is first
139 // verified in ShouldShard().
140 bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
141 return (test_id % total_shards) == shard_index;
142 }
143
144 // A helper class to output results.
145 // Note: as currently XML is the only supported format by gtest, we don't
146 // check output format (e.g. "xml:" prefix) here and output an XML file
147 // unconditionally.
148 // Note: we don't output per-test-case or total summary info like
149 // total failed_test_count, disabled_test_count, elapsed_time and so on.
150 // Only each test (testcase element in the XML) will have the correct
151 // failed/disabled/elapsed_time information. Each test won't include
152 // detailed failure messages either.
153 class ResultsPrinter {
154 public:
155 explicit ResultsPrinter(const CommandLine& command_line);
156 ~ResultsPrinter();
157 void OnTestCaseStart(const char* name, int test_count) const;
158 void OnTestCaseEnd() const;
159
160 void OnTestEnd(const char* name, const char* case_name, bool run,
161 bool failed, bool failure_ignored, double elapsed_time) const;
162 private:
163 FILE* out_;
164
165 DISALLOW_COPY_AND_ASSIGN(ResultsPrinter);
166 };
167
168 ResultsPrinter::ResultsPrinter(const CommandLine& command_line) : out_(NULL) {
169 if (!command_line.HasSwitch(kGTestOutputFlag))
170 return;
171 std::string flag = command_line.GetSwitchValueASCII(kGTestOutputFlag);
172 size_t colon_pos = flag.find(':');
173 FilePath path;
174 if (colon_pos != std::string::npos) {
175 FilePath flag_path = command_line.GetSwitchValuePath(kGTestOutputFlag);
176 FilePath::StringType path_string = flag_path.value();
177 path = FilePath(path_string.substr(colon_pos + 1));
178 // If the given path ends with '/', consider it is a directory.
179 // Note: This does NOT check that a directory (or file) actually exists
180 // (the behavior is same as what gtest does).
181 if (file_util::EndsWithSeparator(path)) {
182 FilePath executable = command_line.GetProgram().BaseName();
183 path = path.Append(executable.ReplaceExtension(
184 FilePath::StringType(FILE_PATH_LITERAL("xml"))));
185 }
186 }
187 if (path.value().empty())
188 path = FilePath(kDefaultOutputFile);
189 FilePath dir_name = path.DirName();
190 if (!file_util::DirectoryExists(dir_name)) {
191 LOG(WARNING) << "The output directory does not exist. "
192 << "Creating the directory: " << dir_name.value();
193 // Create the directory if necessary (because the gtest does the same).
194 file_util::CreateDirectory(dir_name);
195 }
196 out_ = file_util::OpenFile(path, "w");
197 if (!out_) {
198 LOG(ERROR) << "Cannot open output file: "
199 << path.value() << ".";
200 return;
201 }
202 fprintf(out_, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
203 fprintf(out_, "<testsuites name=\"AllTests\" tests=\"\" failures=\"\""
204 " disabled=\"\" errors=\"\" time=\"\">\n");
205 }
206
207 ResultsPrinter::~ResultsPrinter() {
208 if (!out_)
209 return;
210 fprintf(out_, "</testsuites>\n");
211 fclose(out_);
212 }
213
214 void ResultsPrinter::OnTestCaseStart(const char* name, int test_count) const {
215 if (!out_)
216 return;
217 fprintf(out_, " <testsuite name=\"%s\" tests=\"%d\" failures=\"\""
218 " disabled=\"\" errors=\"\" time=\"\">\n", name, test_count);
219 }
220
221 void ResultsPrinter::OnTestCaseEnd() const {
222 if (!out_)
223 return;
224 fprintf(out_, " </testsuite>\n");
225 }
226
227 void ResultsPrinter::OnTestEnd(const char* name,
228 const char* case_name,
229 bool run,
230 bool failed,
231 bool failure_ignored,
232 double elapsed_time) const {
233 if (!out_)
234 return;
235 fprintf(out_, " <testcase name=\"%s\" status=\"%s\" time=\"%.3f\""
236 " classname=\"%s\"",
237 name, run ? "run" : "notrun", elapsed_time / 1000.0, case_name);
238 if (!failed) {
239 fprintf(out_, " />\n");
240 return;
241 }
242 fprintf(out_, ">\n");
243 fprintf(out_, " <failure message=\"\" type=\"\"%s></failure>\n",
244 failure_ignored ? " ignored=\"true\"" : "");
245 fprintf(out_, " </testcase>\n");
246 }
247
248 class TestCasePrinterHelper {
249 public:
250 TestCasePrinterHelper(const ResultsPrinter& printer,
251 const char* name,
252 int total_test_count)
253 : printer_(printer) {
254 printer_.OnTestCaseStart(name, total_test_count);
255 }
256 ~TestCasePrinterHelper() {
257 printer_.OnTestCaseEnd();
258 }
259 private:
260 const ResultsPrinter& printer_;
261
262 DISALLOW_COPY_AND_ASSIGN(TestCasePrinterHelper);
263 };
264
265 // For a basic pattern matching for gtest_filter options. (Copied from
266 // gtest.cc, see the comment below and http://crbug.com/44497)
267 bool PatternMatchesString(const char* pattern, const char* str) {
268 switch (*pattern) {
269 case '\0':
270 case ':': // Either ':' or '\0' marks the end of the pattern.
271 return *str == '\0';
272 case '?': // Matches any single character.
273 return *str != '\0' && PatternMatchesString(pattern + 1, str + 1);
274 case '*': // Matches any string (possibly empty) of characters.
275 return (*str != '\0' && PatternMatchesString(pattern, str + 1)) ||
276 PatternMatchesString(pattern + 1, str);
277 default: // Non-special character. Matches itself.
278 return *pattern == *str &&
279 PatternMatchesString(pattern + 1, str + 1);
280 }
281 }
282
283 // TODO(phajdan.jr): Avoid duplicating gtest code. (http://crbug.com/44497)
284 // For basic pattern matching for gtest_filter options. (Copied from
285 // gtest.cc)
286 bool MatchesFilter(const std::string& name, const std::string& filter) {
287 const char *cur_pattern = filter.c_str();
288 for (;;) {
289 if (PatternMatchesString(cur_pattern, name.c_str())) {
290 return true;
291 }
292
293 // Finds the next pattern in the filter.
294 cur_pattern = strchr(cur_pattern, ':');
295
296 // Returns if no more pattern can be found.
297 if (cur_pattern == NULL) {
298 return false;
299 }
300
301 // Skips the pattern separater (the ':' character).
302 cur_pattern++;
303 }
304 }
305
306 // Runs test specified by |test_name| in a child process,
307 // and returns the exit code.
308 int RunTest(const std::string& test_name, int default_timeout_ms) {
309 // Some of the below method calls will leak objects if there is no
310 // autorelease pool in place.
311 base::mac::ScopedNSAutoreleasePool pool;
312
313 const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
314 CommandLine new_cmd_line(cmd_line->GetProgram());
315 CommandLine::SwitchMap switches = cmd_line->GetSwitches();
316
317 // Strip out gtest_output flag because otherwise we would overwrite results
318 // of the previous test. We will generate the final output file later
319 // in RunTests().
320 switches.erase(kGTestOutputFlag);
321
322 // Strip out gtest_repeat flag because we can only run one test in the child
323 // process (restarting the browser in the same process is illegal after it
324 // has been shut down and will actually crash).
325 switches.erase(kGTestRepeatFlag);
326
327 // Strip out user-data-dir if present. We will add it back in again later.
328 switches.erase(switches::kUserDataDir);
329
330 for (CommandLine::SwitchMap::const_iterator iter = switches.begin();
331 iter != switches.end(); ++iter) {
332 new_cmd_line.AppendSwitchNative((*iter).first, (*iter).second);
333 }
334
335 // Always enable disabled tests. This method is not called with disabled
336 // tests unless this flag was specified to the browser test executable.
337 new_cmd_line.AppendSwitch("gtest_also_run_disabled_tests");
338 new_cmd_line.AppendSwitchASCII("gtest_filter", test_name);
339 new_cmd_line.AppendSwitch(kChildProcessFlag);
340
341 // Do not let the child ignore failures. We need to propagate the
342 // failure status back to the parent.
343 new_cmd_line.AppendSwitch(base::TestSuite::kStrictFailureHandling);
344
345 // Create a new user data dir and pass it to the child.
346 ScopedTempDir temp_dir;
347 if (!temp_dir.CreateUniqueTempDir() || !temp_dir.IsValid()) {
348 LOG(ERROR) << "Error creating temp profile directory";
349 return false;
350 }
351 new_cmd_line.AppendSwitchPath(switches::kUserDataDir, temp_dir.path());
352
353 // file:// access for ChromeOS.
354 new_cmd_line.AppendSwitch(switches::kAllowFileAccess);
355
356 const char* browser_wrapper = getenv("BROWSER_WRAPPER");
357 if (browser_wrapper) {
358 #if defined(OS_WIN)
359 new_cmd_line.PrependWrapper(ASCIIToWide(browser_wrapper));
360 #elif defined(OS_POSIX)
361 new_cmd_line.PrependWrapper(browser_wrapper);
362 #endif
363 VLOG(1) << "BROWSER_WRAPPER was set, prefixing command_line with "
364 << browser_wrapper;
365 }
366
367 base::ProcessHandle process_handle;
368 base::LaunchOptions options;
369
370 #if defined(OS_POSIX)
371 // On POSIX, we launch the test in a new process group with pgid equal to
372 // its pid. Any child processes that the test may create will inherit the
373 // same pgid. This way, if the test is abruptly terminated, we can clean up
374 // any orphaned child processes it may have left behind.
375 options.new_process_group = true;
376 #endif
377
378 if (!base::LaunchProcess(new_cmd_line, options, &process_handle))
379 return false;
380
381 int timeout_ms =
382 test_launcher_utils::GetTestTerminationTimeout(test_name,
383 default_timeout_ms);
384
385 int exit_code = 0;
386 if (!base::WaitForExitCodeWithTimeout(process_handle, &exit_code,
387 timeout_ms)) {
388 LOG(ERROR) << "Test timeout (" << timeout_ms
389 << " ms) exceeded for " << test_name;
390
391 exit_code = -1; // Set a non-zero exit code to signal a failure.
392
393 // Ensure that the process terminates.
394 base::KillProcess(process_handle, -1, true);
395 }
396
397 #if defined(OS_POSIX)
398 if (exit_code != 0) {
399 // On POSIX, in case the test does not exit cleanly, either due to a crash
400 // or due to it timing out, we need to clean up any child processes that
401 // it might have created. On Windows, child processes are automatically
402 // cleaned up using JobObjects.
403 base::KillProcessGroup(process_handle);
404 }
405 #endif
406
407 base::CloseProcessHandle(process_handle);
408
409 return exit_code;
410 }
411
412 bool RunTests(bool should_shard, int total_shards, int shard_index) {
413 const CommandLine* command_line = CommandLine::ForCurrentProcess();
414
415 DCHECK(!command_line->HasSwitch(kGTestListTestsFlag));
416
417 testing::UnitTest* const unit_test = testing::UnitTest::GetInstance();
418
419 std::string filter = command_line->GetSwitchValueASCII(kGTestFilterFlag);
420
421 // Split --gtest_filter at '-', if there is one, to separate into
422 // positive filter and negative filter portions.
423 std::string positive_filter = filter;
424 std::string negative_filter = "";
425 size_t dash_pos = filter.find('-');
426 if (dash_pos != std::string::npos) {
427 positive_filter = filter.substr(0, dash_pos); // Everything up to the dash.
428 negative_filter = filter.substr(dash_pos + 1); // Everything after the dash.
429 }
430
431 int num_runnable_tests = 0;
432 int test_run_count = 0;
433 int ignored_failure_count = 0;
434 std::vector<std::string> failed_tests;
435
436 ResultsPrinter printer(*command_line);
437 for (int i = 0; i < unit_test->total_test_case_count(); ++i) {
438 const testing::TestCase* test_case = unit_test->GetTestCase(i);
439 TestCasePrinterHelper helper(printer, test_case->name(),
440 test_case->total_test_count());
441 for (int j = 0; j < test_case->total_test_count(); ++j) {
442 const testing::TestInfo* test_info = test_case->GetTestInfo(j);
443 std::string test_name = test_info->test_case_name();
444 test_name.append(".");
445 test_name.append(test_info->name());
446
447 // Skip our special test so it's not run twice. That confuses
448 // the log parser.
449 if (test_name == kEmptyTestName)
450 continue;
451
452 // Skip disabled tests.
453 if (test_name.find("DISABLED") != std::string::npos &&
454 !command_line->HasSwitch(kGTestRunDisabledTestsFlag)) {
455 printer.OnTestEnd(test_info->name(), test_case->name(),
456 false, false, false, 0);
457 continue;
458 }
459
460 // Skip the test that doesn't match the filter string (if given).
461 if ((!positive_filter.empty() &&
462 !MatchesFilter(test_name, positive_filter)) ||
463 MatchesFilter(test_name, negative_filter)) {
464 printer.OnTestEnd(test_info->name(), test_case->name(),
465 false, false, false, 0);
466 continue;
467 }
468
469 // Decide if this test should be run.
470 bool should_run = true;
471 if (should_shard) {
472 should_run = ShouldRunTestOnShard(total_shards, shard_index,
473 num_runnable_tests);
474 }
475 num_runnable_tests += 1;
476 // If sharding is enabled and the test should not be run, skip it.
477 if (!should_run) {
478 continue;
479 }
480
481 base::Time start_time = base::Time::Now();
482 ++test_run_count;
483 int exit_code = RunTest(test_name, TestTimeouts::action_max_timeout_ms());
484 if (exit_code == 0) {
485 // Test passed.
486 printer.OnTestEnd(test_info->name(), test_case->name(), true, false,
487 false,
488 (base::Time::Now() - start_time).InMillisecondsF());
489 } else {
490 failed_tests.push_back(test_name);
491
492 bool ignore_failure = false;
493
494 // -1 exit code means a crash or hang. Never ignore those failures,
495 // they are serious and should always be visible.
496 if (exit_code != -1)
497 ignore_failure = base::TestSuite::ShouldIgnoreFailure(*test_info);
498
499 printer.OnTestEnd(test_info->name(), test_case->name(), true, true,
500 ignore_failure,
501 (base::Time::Now() - start_time).InMillisecondsF());
502 if (ignore_failure)
503 ++ignored_failure_count;
504 }
505 }
506 }
507
508 printf("%d test%s run\n", test_run_count, test_run_count > 1 ? "s" : "");
509 printf("%d test%s failed (%d ignored)\n",
510 static_cast<int>(failed_tests.size()),
511 failed_tests.size() > 1 ? "s" : "", ignored_failure_count);
512 if (failed_tests.size() - ignored_failure_count == 0)
513 return true;
514
515 printf("Failing tests:\n");
516 for (std::vector<std::string>::const_iterator iter = failed_tests.begin();
517 iter != failed_tests.end(); ++iter) {
518 printf("%s\n", iter->c_str());
519 }
520
521 return false;
522 }
523
524 void PrintUsage() {
525 fprintf(stdout,
526 "Runs tests using the gtest framework, each test being run in its own\n"
527 "process. Any gtest flags can be specified.\n"
528 " --single_process\n"
529 " Runs the tests and the launcher in the same process. Useful for \n"
530 " debugging a specific test in a debugger.\n"
531 " --single-process\n"
532 " Same as above, and also runs Chrome in single-process mode.\n"
533 " --help\n"
534 " Shows this message.\n"
535 " --gtest_help\n"
536 " Shows the gtest help message.\n");
537 }
538
539 } // namespace
540
541 int main(int argc, char** argv) {
542 #if defined(OS_MACOSX)
543 chrome_browser_application_mac::RegisterBrowserCrApp();
544 #endif
545
546 CommandLine::Init(argc, argv);
547 const CommandLine* command_line = CommandLine::ForCurrentProcess();
548
549 if (command_line->HasSwitch(kHelpFlag)) {
550 PrintUsage();
551 return 0;
552 }
553
554 // TODO(pkasting): This "single_process vs. single-process" design is terrible
555 // UI. Instead, there should be some sort of signal flag on the command line,
556 // with all subsequent arguments passed through to the underlying browser.
557 if (command_line->HasSwitch(kChildProcessFlag) ||
558 command_line->HasSwitch(kSingleProcessTestsFlag) ||
559 command_line->HasSwitch(kSingleProcessTestsAndChromeFlag) ||
560 command_line->HasSwitch(kGTestListTestsFlag) ||
561 command_line->HasSwitch(kGTestHelpFlag)) {
562
563 #if defined(OS_WIN)
564 if (command_line->HasSwitch(kChildProcessFlag) ||
565 command_line->HasSwitch(kSingleProcessTestsFlag)) {
566 // This is the browser process, so setup the sandbox broker.
567 sandbox::BrokerServices* broker_services =
568 sandbox::SandboxFactory::GetBrokerServices();
569 if (broker_services) {
570 sandbox::InitBrokerServices(broker_services);
571 // Precreate the desktop and window station used by the renderers.
572 sandbox::TargetPolicy* policy = broker_services->CreatePolicy();
573 sandbox::ResultCode result = policy->CreateAlternateDesktop(true);
574 CHECK(sandbox::SBOX_ERROR_FAILED_TO_SWITCH_BACK_WINSTATION != result);
575 policy->Release();
576 }
577 }
578 #endif
579 return ChromeTestSuite(argc, argv).Run();
580 }
581
582 #if defined(OS_WIN)
583 if (command_line->HasSwitch(switches::kProcessType)) {
584 // This is a child process, call ChromeMain.
585 FilePath chrome_path(command_line->GetProgram().DirName());
586 chrome_path = chrome_path.Append(chrome::kBrowserResourcesDll);
587 HMODULE dll = LoadLibrary(chrome_path.value().c_str());
588 DLL_MAIN entry_point =
589 reinterpret_cast<DLL_MAIN>(::GetProcAddress(dll, "ChromeMain"));
590 if (!entry_point)
591 return -1;
592
593 // Initialize the sandbox services.
594 sandbox::SandboxInterfaceInfo sandbox_info = {0};
595 sandbox_info.target_services = sandbox::SandboxFactory::GetTargetServices();
596 return entry_point(GetModuleHandle(NULL), &sandbox_info, GetCommandLineW());
597 }
598 #endif
599
600 int32 total_shards;
601 int32 shard_index;
602 bool should_shard = ShouldShard(&total_shards, &shard_index);
603
604 fprintf(stdout,
605 "Starting tests...\n"
606 "IMPORTANT DEBUGGING NOTE: each test is run inside its own process.\n"
607 "For debugging a test inside a debugger, use the\n"
608 "--gtest_filter=<your_test_name> flag along with either\n"
609 "--single_process (to run all tests in one launcher/browser process) or\n"
610 "--single-process (to do the above, and also run Chrome in single-\n"
611 "process mode).\n");
612
613 testing::InitGoogleTest(&argc, argv);
614 TestTimeouts::Initialize();
615
616 // Make sure the entire browser code is loaded into memory. Reading it
617 // from disk may be slow on a busy bot, and can easily exceed the default
618 // timeout causing flaky test failures. Use an empty test that only starts
619 // and closes a browser with a long timeout to avoid those problems.
620 RunTest(kEmptyTestName, TestTimeouts::large_test_timeout_ms());
621
622 int cycles = 1;
623 if (command_line->HasSwitch(kGTestRepeatFlag)) {
624 base::StringToInt(command_line->GetSwitchValueASCII(kGTestRepeatFlag),
625 &cycles);
626 }
627
628 int exit_code = 0;
629 while (cycles != 0) {
630 if (!RunTests(should_shard, total_shards, shard_index)) {
631 exit_code = 1;
632 break;
633 }
634
635 // Special value "-1" means "repeat indefinitely".
636 if (cycles != -1)
637 cycles--;
638 }
639 return exit_code;
640 }
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