Googletest export

Add --gtest_fail_fast support to googletest.

  - Analogous functionality to to golang -test.failfast and python --failfast
  - Stops test execution upon first test failure.
  - Also add support Bazel equivalent env var (TESTBRIDGE_TEST_RUNNER_FAIL_FAST)

PiperOrigin-RevId: 302488880

googletest/docs/advanced.md

@@ -2116,6 +2116,15 @@ For example:
     everything in test suite `FooTest` except `FooTest.Bar` and everything in
     test suite `BarTest` except `BarTest.Foo`.
 
+#### Stop test execution upon first failure
+
+By default, a googletest program runs all tests the user has defined. In some
+cases (e.g. iterative test development & execution) it may be desirable stop
+test execution upon first failure (trading improved latency for completeness).
+If `GTEST_FAIL_FAST` environment variable or `--gtest_fail_fast` flag is set,
+the test runner will stop execution as soon as the first test failure is
+found.
+
 #### Temporarily Disabling Tests
 
 If you have a broken test that you cannot fix right away, you can add the

googletest/include/gtest/gtest.h

@@ -101,6 +101,10 @@ GTEST_DECLARE_bool_(catch_exceptions);
 // to let Google Test decide.
 GTEST_DECLARE_string_(color);
 
+// This flag controls whether the test runner should continue execution past
+// first failure.
+GTEST_DECLARE_bool_(fail_fast);
+
 // This flag sets up the filter to select by name using a glob pattern
 // the tests to run. If the filter is not given all tests are executed.
 GTEST_DECLARE_string_(filter);
@@ -795,6 +799,9 @@ class GTEST_API_ TestInfo {
   // deletes it.
   void Run();
 
+  // Skip and records the test result for this object.
+  void Skip();
+
   static void ClearTestResult(TestInfo* test_info) {
     test_info->result_.Clear();
   }
@@ -943,6 +950,9 @@ class GTEST_API_ TestSuite {
   // Runs every test in this TestSuite.
   void Run();
 
+  // Skips the execution of tests under this TestSuite
+  void Skip();
+
   // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
   // for catching exceptions thrown from SetUpTestSuite().
   void RunSetUpTestSuite() {

googletest/src/gtest-internal-inl.h

@@ -84,6 +84,7 @@ const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
 const char kBreakOnFailureFlag[] = "break_on_failure";
 const char kCatchExceptionsFlag[] = "catch_exceptions";
 const char kColorFlag[] = "color";
+const char kFailFast[] = "fail_fast";
 const char kFilterFlag[] = "filter";
 const char kListTestsFlag[] = "list_tests";
 const char kOutputFlag[] = "output";
@@ -164,6 +165,7 @@ class GTestFlagSaver {
     color_ = GTEST_FLAG(color);
     death_test_style_ = GTEST_FLAG(death_test_style);
     death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
+    fail_fast_ = GTEST_FLAG(fail_fast);
     filter_ = GTEST_FLAG(filter);
     internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
     list_tests_ = GTEST_FLAG(list_tests);
@@ -187,6 +189,7 @@ class GTestFlagSaver {
     GTEST_FLAG(death_test_style) = death_test_style_;
     GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
     GTEST_FLAG(filter) = filter_;
+    GTEST_FLAG(fail_fast) = fail_fast_;
     GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
     GTEST_FLAG(list_tests) = list_tests_;
     GTEST_FLAG(output) = output_;
@@ -208,6 +211,7 @@ class GTestFlagSaver {
   std::string color_;
   std::string death_test_style_;
   bool death_test_use_fork_;
+  bool fail_fast_;
   std::string filter_;
   std::string internal_run_death_test_;
   bool list_tests_;

googletest/src/gtest.cc

@@ -213,6 +213,21 @@ static const char* GetDefaultFilter() {
   return kUniversalFilter;
 }
 
+// Bazel passes in the argument to '--test_runner_fail_fast' via the
+// TESTBRIDGE_TEST_RUNNER_FAIL_FAST environment variable.
+static bool GetDefaultFailFast() {
+  const char* const testbridge_test_runner_fail_fast =
+      internal::posix::GetEnv("TESTBRIDGE_TEST_RUNNER_FAIL_FAST");
+  if (testbridge_test_runner_fail_fast != nullptr) {
+    return strcmp(testbridge_test_runner_fail_fast, "1") == 0;
+  }
+  return false;
+}
+
+GTEST_DEFINE_bool_(
+    fail_fast, internal::BoolFromGTestEnv("fail_fast", GetDefaultFailFast()),
+    "True if and only if a test failure should stop further test execution.");
+
 GTEST_DEFINE_bool_(
     also_run_disabled_tests,
     internal::BoolFromGTestEnv("also_run_disabled_tests", false),
@@ -2863,6 +2878,28 @@ void TestInfo::Run() {
   impl->set_current_test_info(nullptr);
 }
 
+// Skip and records a skipped test result for this object.
+void TestInfo::Skip() {
+  if (!should_run_) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_info(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Notifies the unit test event listeners that a test is about to start.
+  repeater->OnTestStart(*this);
+
+  const TestPartResult test_part_result =
+      TestPartResult(TestPartResult::kSkip, this->file(), this->line(), "");
+  impl->GetTestPartResultReporterForCurrentThread()->ReportTestPartResult(
+      test_part_result);
+
+  // Notifies the unit test event listener that a test has just finished.
+  repeater->OnTestEnd(*this);
+  impl->set_current_test_info(nullptr);
+}
+
 // class TestSuite
 
 // Gets the number of successful tests in this test suite.
@@ -2975,6 +3012,12 @@ void TestSuite::Run() {
   start_timestamp_ = internal::GetTimeInMillis();
   for (int i = 0; i < total_test_count(); i++) {
     GetMutableTestInfo(i)->Run();
+    if (GTEST_FLAG(fail_fast) && GetMutableTestInfo(i)->result()->Failed()) {
+      for (int j = i + 1; j < total_test_count(); j++) {
+        GetMutableTestInfo(j)->Skip();
+      }
+      break;
+    }
   }
   elapsed_time_ = internal::GetTimeInMillis() - start_timestamp_;
 
@@ -2992,6 +3035,36 @@ void TestSuite::Run() {
   impl->set_current_test_suite(nullptr);
 }
 
+// Skips all tests under this TestSuite.
+void TestSuite::Skip() {
+  if (!should_run_) return;
+
+  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
+  impl->set_current_test_suite(this);
+
+  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteStart(*this);
+//  Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
+  repeater->OnTestCaseStart(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
+
+  for (int i = 0; i < total_test_count(); i++) {
+    GetMutableTestInfo(i)->Skip();
+  }
+
+  // Call both legacy and the new API
+  repeater->OnTestSuiteEnd(*this);
+  // Legacy API is deprecated but still available
+#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
+  repeater->OnTestCaseEnd(*this);
+#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
+
+  impl->set_current_test_suite(nullptr);
+}
+
 // Clears the results of all tests in this test suite.
 void TestSuite::ClearResult() {
   ad_hoc_test_result_.Clear();
@@ -5523,6 +5596,13 @@ bool UnitTestImpl::RunAllTests() {
         for (int test_index = 0; test_index < total_test_suite_count();
              test_index++) {
           GetMutableSuiteCase(test_index)->Run();
+          if (GTEST_FLAG(fail_fast) &&
+              GetMutableSuiteCase(test_index)->Failed()) {
+            for (int j = test_index + 1; j < total_test_suite_count(); j++) {
+              GetMutableSuiteCase(j)->Skip();
+            }
+            break;
+          }
         }
       }
 
@@ -6127,31 +6207,31 @@ static const char kColorEncodedHelpMessage[] =
 static bool ParseGoogleTestFlag(const char* const arg) {
   return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
                        &GTEST_FLAG(also_run_disabled_tests)) ||
-      ParseBoolFlag(arg, kBreakOnFailureFlag,
-                    &GTEST_FLAG(break_on_failure)) ||
-      ParseBoolFlag(arg, kCatchExceptionsFlag,
-                    &GTEST_FLAG(catch_exceptions)) ||
-      ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
-      ParseStringFlag(arg, kDeathTestStyleFlag,
-                      &GTEST_FLAG(death_test_style)) ||
-      ParseBoolFlag(arg, kDeathTestUseFork,
-                    &GTEST_FLAG(death_test_use_fork)) ||
-      ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
-      ParseStringFlag(arg, kInternalRunDeathTestFlag,
-                      &GTEST_FLAG(internal_run_death_test)) ||
-      ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
-      ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
-      ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-      ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
-      ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-      ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-      ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-      ParseInt32Flag(arg, kStackTraceDepthFlag,
-                     &GTEST_FLAG(stack_trace_depth)) ||
-      ParseStringFlag(arg, kStreamResultToFlag,
-                      &GTEST_FLAG(stream_result_to)) ||
-      ParseBoolFlag(arg, kThrowOnFailureFlag,
-                    &GTEST_FLAG(throw_on_failure));
+         ParseBoolFlag(arg, kBreakOnFailureFlag,
+                       &GTEST_FLAG(break_on_failure)) ||
+         ParseBoolFlag(arg, kCatchExceptionsFlag,
+                       &GTEST_FLAG(catch_exceptions)) ||
+         ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
+         ParseStringFlag(arg, kDeathTestStyleFlag,
+                         &GTEST_FLAG(death_test_style)) ||
+         ParseBoolFlag(arg, kDeathTestUseFork,
+                       &GTEST_FLAG(death_test_use_fork)) ||
+         ParseBoolFlag(arg, kFailFast, &GTEST_FLAG(fail_fast)) ||
+         ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
+         ParseStringFlag(arg, kInternalRunDeathTestFlag,
+                         &GTEST_FLAG(internal_run_death_test)) ||
+         ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
+         ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
+         ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
+         ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
+         ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
+         ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
+         ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
+         ParseInt32Flag(arg, kStackTraceDepthFlag,
+                        &GTEST_FLAG(stack_trace_depth)) ||
+         ParseStringFlag(arg, kStreamResultToFlag,
+                         &GTEST_FLAG(stream_result_to)) ||
+         ParseBoolFlag(arg, kThrowOnFailureFlag, &GTEST_FLAG(throw_on_failure));
 }
 
 #if GTEST_USE_OWN_FLAGFILE_FLAG_

googletest/test/BUILD.bazel

@@ -58,6 +58,7 @@ cc_test(
             "googletest-catch-exceptions-test_.cc",
             "googletest-color-test_.cc",
             "googletest-env-var-test_.cc",
+            "googletest-failfast-unittest_.cc",
             "googletest-filter-unittest_.cc",
             "googletest-break-on-failure-unittest_.cc",
             "googletest-listener-test.cc",
@@ -222,6 +223,21 @@ py_test(
     deps = [":gtest_test_utils"],
 )
 
+cc_binary(
+    name = "googletest-failfast-unittest_",
+    testonly = 1,
+    srcs = ["googletest-failfast-unittest_.cc"],
+    deps = ["//:gtest"],
+)
+
+py_test(
+    name = "googletest-failfast-unittest",
+    size = "medium",
+    srcs = ["googletest-failfast-unittest.py"],
+    data = [":googletest-failfast-unittest_"],
+    deps = [":gtest_test_utils"],
+)
+
 cc_binary(
     name = "googletest-filter-unittest_",
     testonly = 1,

googletest/test/googletest-env-var-test.py

@@ -85,6 +85,8 @@ def testEnvVarAffectsFlag(self):
 
     TestFlag('break_on_failure', '1', '0')
     TestFlag('color', 'yes', 'auto')
+    SetEnvVar('TESTBRIDGE_TEST_RUNNER_FAIL_FAST', None)  # For 'fail_fast' test
+    TestFlag('fail_fast', '1', '0')
     TestFlag('filter', 'FooTest.Bar', '*')
     SetEnvVar('XML_OUTPUT_FILE', None)  # For 'output' test
     TestFlag('output', 'xml:tmp/foo.xml', '')

googletest/test/googletest-env-var-test_.cc

@@ -72,6 +72,11 @@ void PrintFlag(const char* flag) {
     return;
   }
 
+  if (strcmp(flag, "fail_fast") == 0) {
+    cout << GTEST_FLAG(fail_fast);
+    return;
+  }
+
   if (strcmp(flag, "filter") == 0) {
     cout << GTEST_FLAG(filter);
     return;