Implements support for AssertionResult in Boolean assertions such as…

Makefile.am

@@ -276,7 +276,9 @@ test_gtest_sole_header_test_LDADD = lib/libgtest_main.la
 TESTS += test/gtest_stress_test
 check_PROGRAMS += test/gtest_stress_test
 test_gtest_stress_test_SOURCES = test/gtest_stress_test.cc
-test_gtest_stress_test_LDADD = lib/libgtest.la
+test_gtest_stress_test_CXXFLAGS = $(AM_CXXFLAGS) $(PTHREAD_CFLAGS)
+test_gtest_stress_test_LDADD = $(PTHREAD_LIBS) $(PTHREAD_CFLAGS) \
+                               lib/libgtest.la
 
 TESTS += test/gtest-test-part_test
 check_PROGRAMS += test/gtest-test-part_test

include/gtest/gtest.h

@@ -177,63 +177,145 @@ String StreamableToString(const T& streamable) {
 
 // A class for indicating whether an assertion was successful.  When
 // the assertion wasn't successful, the AssertionResult object
-// remembers a non-empty message that described how it failed.
+// remembers a non-empty message that describes how it failed.
 //
-// This class is useful for defining predicate-format functions to be
+// To create an instance of this class, use one of the factory functions
+// (AssertionSuccess() and AssertionFailure()).
+//
+// This class is useful for two purposes:
+//   1. Defining predicate functions to be used with Boolean test assertions
+//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
+//   2. Defining predicate-format functions to be
 //      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
 //
-// The constructor of AssertionResult is private.  To create an
-// instance of this class, use one of the factory functions
-// (AssertionSuccess() and AssertionFailure()).
+// For example, if you define IsEven predicate:
+//
+//   testing::AssertionResult IsEven(int n) {
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess();
+//     else
+//       return testing::AssertionFailure() << n << " is odd";
+//   }
+//
+// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
+// will print the message
+//
+//   Value of: IsEven(Fib(5))
+//     Actual: false (5 is odd)
+//   Expected: true
+//
+// instead of a more opaque
+//
+//   Value of: IsEven(Fib(5))
+//     Actual: false
+//   Expected: true
+//
+// in case IsEven is a simple Boolean predicate.
+//
+// If you expect your predicate to be reused and want to support informative
+// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
+// about half as often as positive ones in our tests), supply messages for
+// both success and failure cases:
+//
+//   testing::AssertionResult IsEven(int n) {
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess() << n << " is even";
+//     else
+//       return testing::AssertionFailure() << n << " is odd";
+//   }
 //
-// For example, in order to be able to write:
+// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
+//
+//   Value of: IsEven(Fib(6))
+//     Actual: true (8 is even)
+//   Expected: false
+//
+// NB: Predicates that support negative Boolean assertions have reduced
+// performance in positive ones so be careful not to use them in tests
+// that have lots (tens of thousands) of positive Boolean assertions.
+//
+// To use this class with EXPECT_PRED_FORMAT assertions such as:
 //
 //   // Verifies that Foo() returns an even number.
 //   EXPECT_PRED_FORMAT1(IsEven, Foo());
 //
-// you just need to define:
+// you need to define:
 //
 //   testing::AssertionResult IsEven(const char* expr, int n) {
-//     if ((n % 2) == 0) return testing::AssertionSuccess();
-//
-//     Message msg;
-//     msg << "Expected: " << expr << " is even\n"
-//         << "  Actual: it's " << n;
-//     return testing::AssertionFailure(msg);
+//     if ((n % 2) == 0)
+//       return testing::AssertionSuccess();
+//     else
+//       return testing::AssertionFailure()
+//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
 //   }
 //
 // If Foo() returns 5, you will see the following message:
 //
 //   Expected: Foo() is even
 //     Actual: it's 5
+//
 class AssertionResult {
  public:
-  // Declares factory functions for making successful and failed
-  // assertion results as friends.
-  friend AssertionResult AssertionSuccess();
-  friend AssertionResult AssertionFailure(const Message&);
+  // Copy constructor.
+  // Used in EXPECT_TRUE/FALSE(assertion_result).
+  AssertionResult(const AssertionResult& other);
+  // Used in the EXPECT_TRUE/FALSE(bool_expression).
+  explicit AssertionResult(bool success) : success_(success) {}
 
   // Returns true iff the assertion succeeded.
-  operator bool() const { return failure_message_.c_str() == NULL; }  // NOLINT
+  operator bool() const { return success_; }  // NOLINT
+
+  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
+  AssertionResult operator!() const;
+
+  // Returns the text streamed into this AssertionResult. Test assertions
+  // use it when they fail (i.e., the predicate's outcome doesn't match the
+  // assertion's expectation). When nothing has been streamed into the
+  // object, returns an empty string.
+  const char* message() const {
+    return message_.get() != NULL && message_->c_str() != NULL ?
+           message_->c_str() : "";
+  }
+  // TODO(vladl@google.com): Remove this after making sure no clients use it.
+  // Deprecated; please use message() instead.
+  const char* failure_message() const { return message(); }
 
-  // Returns the assertion's failure message.
-  const char* failure_message() const { return failure_message_.c_str(); }
+  // Streams a custom failure message into this object.
+  template <typename T> AssertionResult& operator<<(const T& value);
 
  private:
-  // The default constructor.  It is used when the assertion succeeded.
-  AssertionResult() {}
-
-  // The constructor used when the assertion failed.
-  explicit AssertionResult(const internal::String& failure_message);
-
-  // Stores the assertion's failure message.
-  internal::String failure_message_;
-};
+  // No implementation - we want AssertionResult to be
+  // copy-constructible but not assignable.
+  void operator=(const AssertionResult& other);
+
+  // Stores result of the assertion predicate.
+  bool success_;
+  // Stores the message describing the condition in case the expectation
+  // construct is not satisfied with the predicate's outcome.
+  // Referenced via a pointer to avoid taking too much stack frame space
+  // with test assertions.
+  internal::scoped_ptr<internal::String> message_;
+};  // class AssertionResult
+
+// Streams a custom failure message into this object.
+template <typename T>
+AssertionResult& AssertionResult::operator<<(const T& value) {
+  Message msg;
+  if (message_.get() != NULL)
+    msg << *message_;
+  msg << value;
+  message_.reset(new internal::String(msg.GetString()));
+  return *this;
+}
 
 // Makes a successful assertion result.
 AssertionResult AssertionSuccess();
 
+// Makes a failed assertion result.
+AssertionResult AssertionFailure();
+
 // Makes a failed assertion result with the given failure message.
+// Deprecated; use AssertionFailure() << msg.
 AssertionResult AssertionFailure(const Message& msg);
 
 // The abstract class that all tests inherit from.
@@ -1603,7 +1685,9 @@ const T* TestWithParam<T>::parameter_ = NULL;
 #define ASSERT_ANY_THROW(statement) \
   GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
 
-// Boolean assertions.
+// Boolean assertions. Condition can be either a Boolean expression or an
+// AssertionResult. For more information on how to use AssertionResult with
+// these macros see comments on that class.
 #define EXPECT_TRUE(condition) \
   GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                       GTEST_NONFATAL_FAILURE_)

include/gtest/internal/gtest-internal.h

@@ -299,6 +299,11 @@ AssertionResult EqFailure(const char* expected_expression,
                           const String& actual_value,
                           bool ignoring_case);
 
+// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
+String GetBoolAssertionFailureMessage(const AssertionResult& assertion_result,
+                                      const char* expression_text,
+                                      const char* actual_predicate_value,
+                                      const char* expected_predicate_value);
 
 // This template class represents an IEEE floating-point number
 // (either single-precision or double-precision, depending on the
@@ -858,12 +863,17 @@ class Random {
       fail(gtest_msg)
 
 
-#define GTEST_TEST_BOOLEAN_(boolexpr, booltext, actual, expected, fail) \
+// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
+// either a boolean expression or an AssertionResult. text is a textual
+// represenation of expression as it was passed into the EXPECT_TRUE.
+#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::IsTrue(boolexpr)) \
+  if (const ::testing::AssertionResult gtest_ar_ = \
+      ::testing::AssertionResult(expression)) \
     ; \
   else \
-    fail("Value of: " booltext "\n  Actual: " #actual "\nExpected: " #expected)
+    fail(::testing::internal::GetBoolAssertionFailureMessage(\
+        gtest_ar_, text, #actual, #expected).c_str())
 
 #define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
   GTEST_AMBIGUOUS_ELSE_BLOCKER_ \

include/gtest/internal/gtest-tuple.h

@@ -183,7 +183,7 @@ class GTEST_1_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0) : f0_(f0) {}
 
@@ -215,7 +215,7 @@ class GTEST_2_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1) : f0_(f0),
       f1_(f1) {}
@@ -258,7 +258,7 @@ class GTEST_3_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2) : f0_(f0), f1_(f1), f2_(f2) {}
@@ -295,7 +295,7 @@ class GTEST_4_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3) : f0_(f0), f1_(f1), f2_(f2),
@@ -336,7 +336,7 @@ class GTEST_5_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3,
@@ -380,7 +380,7 @@ class GTEST_6_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_(), f5_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3, GTEST_BY_REF_(T4) f4,
@@ -427,7 +427,7 @@ class GTEST_7_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_(), f5_(), f6_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3, GTEST_BY_REF_(T4) f4,
@@ -476,7 +476,7 @@ class GTEST_8_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_(), f5_(), f6_(), f7_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3, GTEST_BY_REF_(T4) f4,
@@ -528,7 +528,7 @@ class GTEST_9_TUPLE_(T) {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_(), f5_(), f6_(), f7_(), f8_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3, GTEST_BY_REF_(T4) f4,
@@ -582,7 +582,8 @@ class tuple {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : f0_(), f1_(), f2_(), f3_(), f4_(), f5_(), f6_(), f7_(), f8_(),
+      f9_() {}
 
   explicit tuple(GTEST_BY_REF_(T0) f0, GTEST_BY_REF_(T1) f1,
       GTEST_BY_REF_(T2) f2, GTEST_BY_REF_(T3) f3, GTEST_BY_REF_(T4) f4,

include/gtest/internal/gtest-tuple.h.pump

@@ -39,11 +39,11 @@ $$ This meta comment fixes auto-indentation in Emacs. }}
 
 #include <utility>  // For ::std::pair.
 
-// The compiler used in Symbian 5th Edition (__S60_50__) has a bug
-// that prevents us from declaring the tuple template as a friend (it
-// complains that tuple is redefined).  This hack bypasses the bug by
-// declaring the members that should otherwise be private as public.
-#if defined(__SYMBIAN32__) && __S60_50__
+// The compiler used in Symbian has a bug that prevents us from declaring the
+// tuple template as a friend (it complains that tuple is redefined).  This
+// hack bypasses the bug by declaring the members that should otherwise be
+// private as public.
+#if defined(__SYMBIAN32__)
 #define GTEST_DECLARE_TUPLE_AS_FRIEND_ public:
 #else
 #define GTEST_DECLARE_TUPLE_AS_FRIEND_ \
@@ -140,7 +140,7 @@ class $if k < n [[GTEST_$(k)_TUPLE_(T)]] $else [[tuple]] {
  public:
   template <int k> friend class gtest_internal::Get;
 
-  tuple() {}
+  tuple() : $for m, [[f$(m)_()]] {}
 
   explicit tuple($for m, [[GTEST_BY_REF_(T$m) f$m]]) : [[]]
 $for m, [[f$(m)_(f$m)]] {}

scons/SConscript

@@ -279,6 +279,7 @@ if BUILD_TESTS:
   GtestTest(env_with_exceptions, 'gtest_output_test_', gtest_ex)
   GtestTest(env_with_exceptions, 'gtest_throw_on_failure_ex_test', gtest_ex)
   GtestTest(env_with_threads, 'gtest-death-test_test', gtest_main)
+  GtestTest(env_with_threads, 'gtest_stress_test', gtest)
   GtestTest(env_less_optimized, 'gtest_env_var_test_', gtest)
   GtestTest(env_less_optimized, 'gtest_uninitialized_test_', gtest)
   GtestTest(env_use_own_tuple, 'gtest-tuple_test', gtest_use_own_tuple_main)

src/gtest.cc

@@ -952,21 +952,37 @@ String FormatForFailureMessage(wchar_t wchar) {
 
 }  // namespace internal
 
-// AssertionResult constructor.
-AssertionResult::AssertionResult(const internal::String& failure_message)
-    : failure_message_(failure_message) {
+// AssertionResult constructors.
+// Used in EXPECT_TRUE/FALSE(assertion_result).
+AssertionResult::AssertionResult(const AssertionResult& other)
+    : success_(other.success_),
+      message_(other.message_.get() != NULL ?
+               new internal::String(*other.message_) :
+               static_cast<internal::String*>(NULL)) {
 }
 
+// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
+AssertionResult AssertionResult::operator!() const {
+  AssertionResult negation(!success_);
+  if (message_.get() != NULL)
+    negation << *message_;
+  return negation;
+}
 
 // Makes a successful assertion result.
 AssertionResult AssertionSuccess() {
-  return AssertionResult();
+  return AssertionResult(true);
 }
 
+// Makes a failed assertion result.
+AssertionResult AssertionFailure() {
+  return AssertionResult(false);
+}
 
 // Makes a failed assertion result with the given failure message.
+// Deprecated; use AssertionFailure() << message.
 AssertionResult AssertionFailure(const Message& message) {
-  return AssertionResult(message.GetString());
+  return AssertionFailure() << message;
 }
 
 namespace internal {
@@ -1008,6 +1024,20 @@ AssertionResult EqFailure(const char* expected_expression,
   return AssertionFailure(msg);
 }
 
+// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
+String GetBoolAssertionFailureMessage(const AssertionResult& assertion_result,
+                                      const char* expression_text,
+                                      const char* actual_predicate_value,
+                                      const char* expected_predicate_value) {
+  const char* actual_message = assertion_result.message();
+  Message msg;
+  msg << "Value of: " << expression_text
+      << "\n  Actual: " << actual_predicate_value;
+  if (actual_message[0] != '\0')
+    msg << " (" << actual_message << ")";
+  msg << "\nExpected: " << expected_predicate_value;
+  return msg.GetString();
+}
 
 // Helper function for implementing ASSERT_NEAR.
 AssertionResult DoubleNearPredFormat(const char* expr1,

test/gtest-tuple_test.cc

@@ -135,12 +135,44 @@ TEST(ReferenceFieldTest, IsAliasOfReferencedVariable) {
       << "Changing a reference field should update the underlying variable.";
 }
 
-// Tests tuple's default constructor.
-TEST(TupleConstructorTest, DefaultConstructor) {
-  // We are just testing that the following compiles.
+// Tests that tuple's default constructor default initializes each field.
+// This test needs to compile without generating warnings.
+TEST(TupleConstructorTest, DefaultConstructorDefaultInitializesEachField) {
+  // The TR1 report requires that tuple's default constructor default
+  // initializes each field, even if it's a primitive type.  If the
+  // implementation forgets to do this, this test will catch it by
+  // generating warnings about using uninitialized variables (assuming
+  // a decent compiler).
+
   tuple<> empty;
-  tuple<int> one_field;
-  tuple<double, char, bool*> three_fields;
+
+  tuple<int> a1, b1;
+  b1 = a1;
+  EXPECT_EQ(0, get<0>(b1));
+
+  tuple<int, double> a2, b2;
+  b2 = a2;
+  EXPECT_EQ(0, get<0>(b2));
+  EXPECT_EQ(0.0, get<1>(b2));
+
+  tuple<double, char, bool*> a3, b3;
+  b3 = a3;
+  EXPECT_EQ(0.0, get<0>(b3));
+  EXPECT_EQ('\0', get<1>(b3));
+  EXPECT_EQ(NULL, get<2>(b3));
+
+  tuple<int, int, int, int, int, int, int, int, int, int> a10, b10;
+  b10 = a10;
+  EXPECT_EQ(0, get<0>(b10));
+  EXPECT_EQ(0, get<1>(b10));
+  EXPECT_EQ(0, get<2>(b10));
+  EXPECT_EQ(0, get<3>(b10));
+  EXPECT_EQ(0, get<4>(b10));
+  EXPECT_EQ(0, get<5>(b10));
+  EXPECT_EQ(0, get<6>(b10));
+  EXPECT_EQ(0, get<7>(b10));
+  EXPECT_EQ(0, get<8>(b10));
+  EXPECT_EQ(0, get<9>(b10));
 }
 
 // Tests constructing a tuple from its fields.

test/gtest_stress_test.cc

@@ -32,9 +32,10 @@
 // Tests that SCOPED_TRACE() and various Google Test assertions can be
 // used in a large number of threads concurrently.
 
-#include <iostream>
 #include <gtest/gtest.h>
 
+#include <iostream>
+
 // We must define this macro in order to #include
 // gtest-internal-inl.h.  This is how Google Test prevents a user from
 // accidentally depending on its internal implementation.
@@ -42,6 +43,8 @@
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_
 
+#if GTEST_IS_THREADSAFE
+
 namespace testing {
 namespace {
 
@@ -49,6 +52,20 @@ using internal::String;
 using internal::TestPropertyKeyIs;
 using internal::Vector;
 
+// In order to run tests in this file, for platforms where Google Test is
+// thread safe, implement ThreadWithParam with the following interface:
+//
+// template <typename T> class ThreadWithParam {
+//  public:
+//   // Creates the thread. The thread should execute thread_func(param) when
+//   // started by a call to Start().
+//   ThreadWithParam(void (*thread_func)(T), T param);
+//   // Starts the thread.
+//   void Start();
+//   // Waits for the thread to finish.
+//   void Join();
+// };
+
 // How many threads to create?
 const int kThreadCount = 50;
 
@@ -77,7 +94,7 @@ void ExpectKeyAndValueWereRecordedForId(const Vector<TestProperty>& properties,
 // Calls a large number of Google Test assertions, where exactly one of them
 // will fail.
 void ManyAsserts(int id) {
-  ::std::cout << "Thread #" << id << " running...\n";
+  GTEST_LOG_(INFO) << "Thread #" << id << " running...";
 
   SCOPED_TRACE(Message() << "Thread #" << id);
 
@@ -104,41 +121,125 @@ void ManyAsserts(int id) {
   }
 }
 
+void CheckTestFailureCount(int expected_failures) {
+  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
+  const TestResult* const result = info->result();
+  GTEST_CHECK_(expected_failures == result->total_part_count())
+      << "Logged " << result->total_part_count() << " failures "
+      << " vs. " << expected_failures << " expected";
+}
+
 // Tests using SCOPED_TRACE() and Google Test assertions in many threads
 // concurrently.
 TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
-  // TODO(wan): when Google Test is made thread-safe, run
-  // ManyAsserts() in many threads here.
+  ThreadWithParam<int>* threads[kThreadCount] = {};
+  for (int i = 0; i != kThreadCount; i++) {
+    // Creates a thread to run the ManyAsserts() function.
+    threads[i] = new ThreadWithParam<int>(&ManyAsserts, i);
+
+    // Starts the thread.
+    threads[i]->Start();
+  }
+
+  // At this point, we have many threads running.
+
+  for (int i = 0; i != kThreadCount; i++) {
+    // We block until the thread is done.
+    threads[i]->Join();
+    delete threads[i];
+    threads[i] = NULL;
+  }
+
+  // Ensures that kThreadCount*kThreadCount failures have been reported.
+  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
+  const TestResult* const result = info->result();
+
+  Vector<TestProperty> properties;
+  // We have no access to the TestResult's list of properties but we can
+  // copy them one by one.
+  for (int i = 0; i < result->test_property_count(); ++i)
+    properties.PushBack(result->GetTestProperty(i));
+
+  EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
+      << "String and int values recorded on each thread, "
+      << "as well as one shared_key";
+  for (int i = 0; i < kThreadCount; ++i) {
+    ExpectKeyAndValueWereRecordedForId(properties, i, "string");
+    ExpectKeyAndValueWereRecordedForId(properties, i, "int");
+  }
+  CheckTestFailureCount(kThreadCount*kThreadCount);
+}
+
+void FailingThread(bool is_fatal) {
+  if (is_fatal)
+    FAIL() << "Fatal failure in some other thread. "
+           << "(This failure is expected.)";
+  else
+    ADD_FAILURE() << "Non-fatal failure in some other thread. "
+                  << "(This failure is expected.)";
+}
+
+void GenerateFatalFailureInAnotherThread(bool is_fatal) {
+  ThreadWithParam<bool> thread(&FailingThread, is_fatal);
+  thread.Start();
+  thread.Join();
 }
 
 TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
-  // TODO(mheule@google.com): Test this works correctly when Google
-  // Test is made thread-safe.
+  EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
+  // We should only have one failure (the one from
+  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
+  // should succeed.
+  CheckTestFailureCount(1);
 }
 
+void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
+  ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
+}
 TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
-  // TODO(mheule@google.com): Test this works correctly when Google
-  // Test is made thread-safe.
+  // Using a subroutine, to make sure, that the test continues.
+  AssertNoFatalFailureIgnoresFailuresInOtherThreads();
+  // We should only have one failure (the one from
+  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
+  // should succeed.
+  CheckTestFailureCount(1);
 }
 
 TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
-  // TODO(mheule@google.com): Test this works correctly when Google
-  // Test is made thread-safe.
+  // This statement should fail, since the current thread doesn't generate a
+  // fatal failure, only another one does.
+  EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
+  CheckTestFailureCount(2);
 }
 
 TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
-  // TODO(wan@google.com): Test this works correctly when Google Test
-  // is made thread-safe.
+  // This statement should succeed, because failures in all threads are
+  // considered.
+  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
+      GenerateFatalFailureInAnotherThread(true), "expected");
+  CheckTestFailureCount(0);
+  // We need to add a failure, because main() checks that there are failures.
+  // But when only this test is run, we shouldn't have any failures.
+  ADD_FAILURE() << "This is an expected non-fatal failure.";
 }
 
 TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
-  // TODO(mheule@google.com): Test this works correctly when Google
-  // Test is made thread-safe.
+  // This statement should fail, since the current thread doesn't generate a
+  // fatal failure, only another one does.
+  EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
+                          "expected");
+  CheckTestFailureCount(2);
 }
 
 TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  // TODO(wan@google.com): Test this works correctly when Google Test
-  // is made thread-safe.
+  // This statement should succeed, because failures in all threads are
+  // considered.
+  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
+      GenerateFatalFailureInAnotherThread(false), "expected");
+  CheckTestFailureCount(0);
+  // We need to add a failure, because main() checks that there are failures,
+  // But when only this test is run, we shouldn't have any failures.
+  ADD_FAILURE() << "This is an expected non-fatal failure.";
 }
 
 }  // namespace
@@ -147,5 +248,20 @@ TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
 int main(int argc, char **argv) {
   testing::InitGoogleTest(&argc, argv);
 
+  const int result = RUN_ALL_TESTS();  // Expected to fail.
+  GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";
+
+  printf("\nPASS\n");
+  return 0;
+}
+
+#else
+TEST(StressTest,
+     DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
+}
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
 }
+#endif  // GTEST_IS_THREADSAFE

test/gtest_unittest.cc

@@ -2418,6 +2418,25 @@ AssertionResult AssertIsEven(const char* expr, int n) {
   return AssertionFailure(msg);
 }
 
+// A predicate function that returns AssertionResult for use in
+// EXPECT/ASSERT_TRUE/FALSE.
+AssertionResult ResultIsEven(int n) {
+  if (IsEven(n))
+    return AssertionSuccess() << n << " is even";
+  else
+    return AssertionFailure() << n << " is odd";
+}
+
+// A predicate function that returns AssertionResult but gives no
+// explanation why it succeeds. Needed for testing that
+// EXPECT/ASSERT_FALSE handles such functions correctly.
+AssertionResult ResultIsEvenNoExplanation(int n) {
+  if (IsEven(n))
+    return AssertionSuccess();
+  else
+    return AssertionFailure() << n << " is odd";
+}
+
 // A predicate-formatter functor that asserts the argument is an even
 // number.
 struct AssertIsEvenFunctor {
@@ -3786,6 +3805,20 @@ TEST(AssertionTest, ASSERT_TRUE) {
                        "2 < 1");
 }
 
+// Tests ASSERT_TRUE(predicate) for predicates returning AssertionResult.
+TEST(AssertionTest, AssertTrueWithAssertionResult) {
+  ASSERT_TRUE(ResultIsEven(2));
+  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEven(3)),
+                       "Value of: ResultIsEven(3)\n"
+                       "  Actual: false (3 is odd)\n"
+                       "Expected: true");
+  ASSERT_TRUE(ResultIsEvenNoExplanation(2));
+  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEvenNoExplanation(3)),
+                       "Value of: ResultIsEvenNoExplanation(3)\n"
+                       "  Actual: false (3 is odd)\n"
+                       "Expected: true");
+}
+
 // Tests ASSERT_FALSE.
 TEST(AssertionTest, ASSERT_FALSE) {
   ASSERT_FALSE(2 < 1);  // NOLINT
@@ -3795,6 +3828,20 @@ TEST(AssertionTest, ASSERT_FALSE) {
                        "Expected: false");
 }
 
+// Tests ASSERT_FALSE(predicate) for predicates returning AssertionResult.
+TEST(AssertionTest, AssertFalseWithAssertionResult) {
+  ASSERT_FALSE(ResultIsEven(3));
+  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEven(2)),
+                       "Value of: ResultIsEven(2)\n"
+                       "  Actual: true (2 is even)\n"
+                       "Expected: false");
+  ASSERT_FALSE(ResultIsEvenNoExplanation(3));
+  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEvenNoExplanation(2)),
+                       "Value of: ResultIsEvenNoExplanation(2)\n"
+                       "  Actual: true\n"
+                       "Expected: false");
+}
+
 #ifdef __BORLANDC__
 // Restores warnings after previous "#pragma option push" supressed them
 #pragma option pop
@@ -4336,6 +4383,20 @@ TEST(ExpectTest, EXPECT_TRUE) {
                           "2 > 3");
 }
 
+// Tests EXPECT_TRUE(predicate) for predicates returning AssertionResult.
+TEST(ExpectTest, ExpectTrueWithAssertionResult) {
+  EXPECT_TRUE(ResultIsEven(2));
+  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEven(3)),
+                          "Value of: ResultIsEven(3)\n"
+                          "  Actual: false (3 is odd)\n"
+                          "Expected: true");
+  EXPECT_TRUE(ResultIsEvenNoExplanation(2));
+  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEvenNoExplanation(3)),
+                          "Value of: ResultIsEvenNoExplanation(3)\n"
+                          "  Actual: false (3 is odd)\n"
+                          "Expected: true");
+}
+
 // Tests EXPECT_FALSE.
 TEST(ExpectTest, EXPECT_FALSE) {
   EXPECT_FALSE(2 < 1);  // NOLINT
@@ -4347,6 +4408,20 @@ TEST(ExpectTest, EXPECT_FALSE) {
                           "2 < 3");
 }
 
+// Tests EXPECT_FALSE(predicate) for predicates returning AssertionResult.
+TEST(ExpectTest, ExpectFalseWithAssertionResult) {
+  EXPECT_FALSE(ResultIsEven(3));
+  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEven(2)),
+                          "Value of: ResultIsEven(2)\n"
+                          "  Actual: true (2 is even)\n"
+                          "Expected: false");
+  EXPECT_FALSE(ResultIsEvenNoExplanation(3));
+  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEvenNoExplanation(2)),
+                          "Value of: ResultIsEvenNoExplanation(2)\n"
+                          "  Actual: true\n"
+                          "Expected: false");
+}
+
 #ifdef __BORLANDC__
 // Restores warnings after previous "#pragma option push" supressed them
 #pragma option pop
@@ -4952,6 +5027,63 @@ TEST_F(TestLifeCycleTest, Test2) {
 
 }  // namespace
 
+// Tests that the copy constructor works when it is NOT optimized away by
+// the compiler.
+TEST(AssertionResultTest, CopyConstructorWorksWhenNotOptimied) {
+  // Checks that the copy constructor doesn't try to dereference NULL pointers
+  // in the source object.
+  AssertionResult r1 = AssertionSuccess();
+  AssertionResult r2 = r1;
+  // The following line is added to prevent the compiler from optimizing
+  // away the constructor call.
+  r1 << "abc";
+
+  AssertionResult r3 = r1;
+  EXPECT_EQ(static_cast<bool>(r3), static_cast<bool>(r1));
+  EXPECT_STREQ("abc", r1.message());
+}
+
+// Tests that AssertionSuccess and AssertionFailure construct
+// AssertionResult objects as expected.
+TEST(AssertionResultTest, ConstructionWorks) {
+  AssertionResult r1 = AssertionSuccess();
+  EXPECT_TRUE(r1);
+  EXPECT_STREQ("", r1.message());
+
+  AssertionResult r2 = AssertionSuccess() << "abc";
+  EXPECT_TRUE(r2);
+  EXPECT_STREQ("abc", r2.message());
+
+  AssertionResult r3 = AssertionFailure();
+  EXPECT_FALSE(r3);
+  EXPECT_STREQ("", r3.message());
+
+  AssertionResult r4 = AssertionFailure() << "def";
+  EXPECT_FALSE(r4);
+  EXPECT_STREQ("def", r4.message());
+
+  AssertionResult r5 = AssertionFailure(Message() << "ghi");
+  EXPECT_FALSE(r5);
+  EXPECT_STREQ("ghi", r5.message());
+}
+
+// Tests that the negation fips the predicate result but keeps the message.
+TEST(AssertionResultTest, NegationWorks) {
+  AssertionResult r1 = AssertionSuccess() << "abc";
+  EXPECT_FALSE(!r1);
+  EXPECT_STREQ("abc", (!r1).message());
+
+  AssertionResult r2 = AssertionFailure() << "def";
+  EXPECT_TRUE(!r2);
+  EXPECT_STREQ("def", (!r2).message());
+}
+
+TEST(AssertionResultTest, StreamingWorks) {
+  AssertionResult r = AssertionSuccess();
+  r << "abc" << 'd' << 0 << true;
+  EXPECT_STREQ("abcd0true", r.message());
+}
+
 // Tests streaming a user type whose definition and operator << are
 // both in the global namespace.
 class Base {