More implementation of the event listener interface (by Vlad Losev); Reduces the stack space usage of assertions by moving AssertHelper's fields to the heap (by Jorg Brown); Makes String faster, smaller, and simpler (by Zhanyong Wan); Fixes a bug in String::Format() (by Chandler); Adds the /MD version of VC projects to the distribution (by Vlad Losev).

5 files changed, 625 insertions, 7 deletions

diff --git a/test/gtest-listener_test.cc b/test/gtest-listener_test.cc
new file mode 100644
index 0000000..fb6fcf4
--- /dev/null
+++ b/test/gtest-listener_test.cc
@@ -0,0 +1,230 @@
+// Copyright 2009 Google Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: vladl@google.com (Vlad Losev)
+//
+// The Google C++ Testing Framework (Google Test)
+//
+// This file verifies Google Test event listeners receive events at the
+// right times.
+
+#include <gtest/gtest.h>
+
+// Indicates that this translation unit is part of Google Test's
+// implementation.  It must come before gtest-internal-inl.h is
+// included, or there will be a compiler error.  This trick is to
+// prevent a user from accidentally including gtest-internal-inl.h in
+// his code.
+#define GTEST_IMPLEMENTATION_ 1
+#include "src/gtest-internal-inl.h"  // For Vector.
+#undef GTEST_IMPLEMENTATION_
+
+using ::testing::AddGlobalTestEnvironment;
+using ::testing::Environment;
+using ::testing::InitGoogleTest;
+using ::testing::Test;
+using ::testing::TestInfo;
+using ::testing::TestPartResult;
+using ::testing::UnitTest;
+using ::testing::internal::String;
+using ::testing::internal::TestCase;
+using ::testing::internal::UnitTestEventListenerInterface;
+using ::testing::internal::Vector;
+
+// Used by tests to register their events.
+Vector<String>* g_events = NULL;
+
+namespace testing {
+namespace internal {
+
+// TODO(vladl@google.com): Remove this and use UnitTest::listeners()
+// directly after it is published.
+class UnitTestAccessor {
+ public:
+  static EventListeners& GetEventListeners() {
+    return UnitTest::GetInstance()->listeners();
+  }
+  static bool UnitTestFailed() { return UnitTest::GetInstance()->Failed(); }
+};
+
+class EventRecordingListener : public UnitTestEventListenerInterface {
+ protected:
+  virtual void OnUnitTestStart(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnUnitTestStart"));
+  }
+
+  virtual void OnGlobalSetUpStart(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnGlobalSetUpStart"));
+  }
+
+  virtual void OnGlobalSetUpEnd(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnGlobalSetUpEnd"));
+  }
+
+  virtual void OnTestCaseStart(const TestCase& test_case) {
+    g_events->PushBack(String("TestEventListener::OnTestCaseStart"));
+  }
+
+  virtual void OnTestStart(const TestInfo& test_info) {
+    g_events->PushBack(String("TestEventListener::OnTestStart"));
+  }
+
+  virtual void OnNewTestPartResult(const TestPartResult& test_part_result) {
+    g_events->PushBack(String("TestEventListener::OnNewTestPartResult"));
+  }
+
+  virtual void OnTestEnd(const TestInfo& test_info) {
+    g_events->PushBack(String("TestEventListener::OnTestEnd"));
+  }
+
+  virtual void OnTestCaseEnd(const TestCase& test_case) {
+    g_events->PushBack(String("TestEventListener::OnTestCaseEnd"));
+  }
+
+  virtual void OnGlobalTearDownStart(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnGlobalTearDownStart"));
+  }
+
+  virtual void OnGlobalTearDownEnd(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnGlobalTearDownEnd"));
+  }
+
+  virtual void OnUnitTestEnd(const UnitTest& unit_test) {
+    g_events->PushBack(String("TestEventListener::OnUnitTestEnd"));
+  }
+};
+
+class EnvironmentInvocationCatcher : public Environment {
+ protected:
+  virtual void SetUp() {
+    g_events->PushBack(String("Environment::SetUp"));
+  }
+
+  virtual void TearDown() {
+    g_events->PushBack(String("Environment::TearDown"));
+  }
+};
+
+class ListenerTest : public Test {
+ protected:
+  static void SetUpTestCase() {
+    g_events->PushBack(String("ListenerTest::SetUpTestCase"));
+  }
+
+  static void TearDownTestCase() {
+    g_events->PushBack(String("ListenerTest::TearDownTestCase"));
+  }
+
+  virtual void SetUp() {
+    g_events->PushBack(String("ListenerTest::SetUp"));
+  }
+
+  virtual void TearDown() {
+    g_events->PushBack(String("ListenerTest::TearDown"));
+  }
+};
+
+TEST_F(ListenerTest, DoesFoo) {
+  // Test execution order within a test case is not guaranteed so we are not
+  // recording the test name.
+  g_events->PushBack(String("ListenerTest::* Test Body"));
+  SUCCEED();  // Triggers OnTestPartResult.
+}
+
+TEST_F(ListenerTest, DoesBar) {
+  g_events->PushBack(String("ListenerTest::* Test Body"));
+  SUCCEED();  // Triggers OnTestPartResult.
+}
+
+}  // namespace internal
+
+}  // namespace testing
+
+using ::testing::internal::EnvironmentInvocationCatcher;
+using ::testing::internal::EventRecordingListener;
+using ::testing::internal::UnitTestAccessor;
+
+int main(int argc, char **argv) {
+  Vector<String> events;
+  g_events = &events;
+  InitGoogleTest(&argc, argv);
+
+  UnitTestEventListenerInterface* listener = new EventRecordingListener;
+  UnitTestAccessor::GetEventListeners().Append(listener);
+
+  AddGlobalTestEnvironment(new EnvironmentInvocationCatcher);
+
+  GTEST_CHECK_(events.size() == 0)
+      << "AddGlobalTestEnvironment should not generate any events itself.";
+
+  int ret_val = RUN_ALL_TESTS();
+
+  const char* const expected_events[] = {
+    "TestEventListener::OnUnitTestStart",
+    "TestEventListener::OnGlobalSetUpStart",
+    "Environment::SetUp",
+    "TestEventListener::OnGlobalSetUpEnd",
+    "TestEventListener::OnTestCaseStart",
+    "ListenerTest::SetUpTestCase",
+    "TestEventListener::OnTestStart",
+    "ListenerTest::SetUp",
+    "ListenerTest::* Test Body",
+    "TestEventListener::OnNewTestPartResult",
+    "ListenerTest::TearDown",
+    "TestEventListener::OnTestEnd",
+    "TestEventListener::OnTestStart",
+    "ListenerTest::SetUp",
+    "ListenerTest::* Test Body",
+    "TestEventListener::OnNewTestPartResult",
+    "ListenerTest::TearDown",
+    "TestEventListener::OnTestEnd",
+    "ListenerTest::TearDownTestCase",
+    "TestEventListener::OnTestCaseEnd",
+    "TestEventListener::OnGlobalTearDownStart",
+    "Environment::TearDown",
+    "TestEventListener::OnGlobalTearDownEnd",
+    "TestEventListener::OnUnitTestEnd"
+  };
+  const int kExpectedEventsSize =
+      sizeof(expected_events)/sizeof(expected_events[0]);
+
+  // Cannot use ASSERT_EQ() here because it requires the scoping function to
+  // return void.
+  GTEST_CHECK_(events.size() == kExpectedEventsSize);
+
+  for (int i = 0; i < events.size(); ++i)
+    GTEST_CHECK_(String(events.GetElement(i)) == expected_events[i])
+        << "At position " << i;
+
+  // We need to check manually for ad hoc test failures that happen after
+  // RUN_ALL_TESTS finishes.
+  if (UnitTestAccessor::UnitTestFailed())
+    ret_val = 1;
+
+  return ret_val;
+}
diff --git a/test/gtest_env_var_test.py b/test/gtest_env_var_test.py
index 19fd810..f8250d4 100755
--- a/test/gtest_env_var_test.py
+++ b/test/gtest_env_var_test.py
@@ -85,7 +85,7 @@ class GTestEnvVarTest(gtest_test_utils.TestCase):
     TestFlag('break_on_failure', '1', '0')
     TestFlag('color', 'yes', 'auto')
     TestFlag('filter', 'FooTest.Bar', '*')
-    TestFlag('output', 'tmp/foo.xml', '')
+    TestFlag('output', 'xml:tmp/foo.xml', '')
     TestFlag('print_time', '0', '1')
     TestFlag('repeat', '999', '1')
     TestFlag('throw_on_failure', '1', '0')
diff --git a/test/gtest_unittest.cc b/test/gtest_unittest.cc
index 90d29e5..dcec9da 100644
--- a/test/gtest_unittest.cc
+++ b/test/gtest_unittest.cc
@@ -84,11 +84,38 @@ const char* FormatTimeInMillisAsSeconds(TimeInMillis ms);
 
 bool ParseInt32Flag(const char* str, const char* flag, Int32* value);
 
+// Provides access to otherwise private parts of the EventListeners class
+// that are needed to test it.
+class EventListenersAccessor {
+ public:
+  static UnitTestEventListenerInterface* GetRepeater(
+      EventListeners* listeners) { return listeners->repeater(); }
+
+  static void SetDefaultResultPrinter(
+      EventListeners* listeners,
+      UnitTestEventListenerInterface* listener) {
+    listeners->SetDefaultResultPrinter(listener);
+  }
+  static void SetDefaultXmlGenerator(EventListeners* listeners,
+                                     UnitTestEventListenerInterface* listener) {
+    listeners->SetDefaultXmlGenerator(listener);
+  }
+
+  static bool EventForwardingEnabled(const EventListeners& listeners) {
+    return listeners.EventForwardingEnabled();
+  }
+
+  static void SuppressEventForwarding(EventListeners* listeners) {
+    listeners->SuppressEventForwarding();
+  }
+};
+
 }  // namespace internal
 }  // namespace testing
 
 using testing::internal::FormatTimeInMillisAsSeconds;
 using testing::internal::ParseInt32Flag;
+using testing::internal::EventListenersAccessor;
 
 namespace testing {
 
@@ -136,7 +163,9 @@ using testing::internal::kMaxRandomSeed;
 using testing::internal::kTestTypeIdInGoogleTest;
 using testing::internal::AppendUserMessage;
 using testing::internal::CodePointToUtf8;
+using testing::internal::EmptyTestEventListener;
 using testing::internal::EqFailure;
+using testing::internal::EventListeners;
 using testing::internal::FloatingPoint;
 using testing::internal::GTestFlagSaver;
 using testing::internal::GetCurrentOsStackTraceExceptTop;
@@ -160,6 +189,7 @@ using testing::internal::ThreadLocal;
 using testing::internal::Vector;
 using testing::internal::WideStringToUtf8;
 using testing::internal::kTestTypeIdInGoogleTest;
+using testing::internal::scoped_ptr;
 
 // This line tests that we can define tests in an unnamed namespace.
 namespace {
@@ -695,14 +725,16 @@ TEST(ListDeathTest, GetElement) {
       "Invalid Vector index -1: must be in range \\[0, 2\\]\\.");
 }
 
-// Tests the String class.
+// Tests the size of the AssertHelper class.
 
-TEST(StringTest, SizeIsSmall) {
+TEST(AssertHelperTest, AssertHelperIsSmall) {
   // To avoid breaking clients that use lots of assertions in one
-  // function, we cannot grow the size of String.
-  EXPECT_LE(sizeof(String), sizeof(void*));
+  // function, we cannot grow the size of AssertHelper.
+  EXPECT_LE(sizeof(testing::internal::AssertHelper), sizeof(void*));
 }
 
+// Tests the String class.
+
 // Tests String's constructors.
 TEST(StringTest, Constructors) {
   // Default ctor.
@@ -1037,6 +1069,33 @@ TEST(StringTest, Streams) {
   EXPECT_EQ(StreamableToString(String("a\0b", 3)), "a\\0b");
 }
 
+// Tests that String::Format() works.
+TEST(StringTest, FormatWorks) {
+  // Normal case: the format spec is valid, the arguments match the
+  // spec, and the result is < 4095 characters.
+  EXPECT_STREQ("Hello, 42", String::Format("%s, %d", "Hello", 42).c_str());
+
+  // Edge case: the result is 4095 characters.
+  char buffer[4096];
+  const size_t kSize = sizeof(buffer);
+  memset(buffer, 'a', kSize - 1);
+  buffer[kSize - 1] = '\0';
+  EXPECT_STREQ(buffer, String::Format("%s", buffer).c_str());
+
+  // The result needs to be 4096 characters, exceeding Format()'s limit.
+  EXPECT_STREQ("<formatting error or buffer exceeded>",
+               String::Format("x%s", buffer).c_str());
+
+#if GTEST_OS_LINUX
+  // On Linux, invalid format spec should lead to an error message.
+  // In other environment (e.g. MSVC on Windows), String::Format() may
+  // simply ignore a bad format spec, so this assertion is run on
+  // Linux only.
+  EXPECT_STREQ("<formatting error or buffer exceeded>",
+               String::Format("%").c_str());
+#endif
+}
+
 #if GTEST_OS_WINDOWS
 
 // Tests String::ShowWideCString().
@@ -6142,3 +6201,275 @@ TEST(HasFailureTest, WorksOutsideOfTestBody2) {
   ClearCurrentTestPartResults();
   EXPECT_TRUE(has_failure);
 }
+
+class TestListener : public EmptyTestEventListener {
+ public:
+  TestListener() : on_start_counter_(NULL), is_destroyed_(NULL) {}
+  TestListener(int* on_start_counter, bool* is_destroyed)
+      : on_start_counter_(on_start_counter),
+        is_destroyed_(is_destroyed) {}
+
+  virtual ~TestListener() {
+    if (is_destroyed_)
+      *is_destroyed_ = true;
+  }
+
+ protected:
+  virtual void OnUnitTestStart(const UnitTest& /*unit_test*/) {
+    if (on_start_counter_ != NULL)
+      (*on_start_counter_)++;
+  }
+
+ private:
+  int* on_start_counter_;
+  bool* is_destroyed_;
+};
+
+// Tests the constructor.
+TEST(EventListenersTest, ConstructionWorks) {
+  EventListeners listeners;
+
+  EXPECT_TRUE(EventListenersAccessor::GetRepeater(&listeners) != NULL);
+  EXPECT_TRUE(listeners.default_result_printer() == NULL);
+  EXPECT_TRUE(listeners.default_xml_generator() == NULL);
+}
+
+// Tests that the EventListeners destructor deletes all the listeners it
+// owns.
+TEST(EventListenersTest, DestructionWorks) {
+  bool default_result_printer_is_destroyed = false;
+  bool default_xml_printer_is_destroyed = false;
+  bool extra_listener_is_destroyed = false;
+  TestListener* default_result_printer = new TestListener(
+      NULL, &default_result_printer_is_destroyed);
+  TestListener* default_xml_printer = new TestListener(
+      NULL, &default_xml_printer_is_destroyed);
+  TestListener* extra_listener = new TestListener(
+      NULL, &extra_listener_is_destroyed);
+
+  {
+    EventListeners listeners;
+    EventListenersAccessor::SetDefaultResultPrinter(&listeners,
+                                                    default_result_printer);
+    EventListenersAccessor::SetDefaultXmlGenerator(&listeners,
+                                                   default_xml_printer);
+    listeners.Append(extra_listener);
+  }
+  EXPECT_TRUE(default_result_printer_is_destroyed);
+  EXPECT_TRUE(default_xml_printer_is_destroyed);
+  EXPECT_TRUE(extra_listener_is_destroyed);
+}
+
+// Tests that a listener Append'ed to an EventListeners list starts
+// receiving events.
+TEST(EventListenersTest, Append) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+  {
+    EventListeners listeners;
+    listeners.Append(listener);
+    EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+        *UnitTest::GetInstance());
+    EXPECT_EQ(1, on_start_counter);
+  }
+  EXPECT_TRUE(is_destroyed);
+}
+
+// Tests that listeners receive requests in the order they were appended to
+// the list.
+class SequenceTestingListener : public EmptyTestEventListener {
+ public:
+  SequenceTestingListener(Vector<const char*>* vector, const char* signature)
+      : vector_(vector), signature_(signature) {}
+
+ protected:
+  virtual void OnUnitTestStart(const UnitTest& /*unit_test*/) {
+    if (vector_ != NULL)
+      vector_->PushBack(signature_);
+  }
+
+ private:
+  Vector<const char*>* vector_;
+  const char* const signature_;
+};
+
+TEST(EventListenerTest, AppendKeepsOrder) {
+  Vector<const char*> vec;
+  EventListeners listeners;
+  listeners.Append(new SequenceTestingListener(&vec, "0"));
+  listeners.Append(new SequenceTestingListener(&vec, "1"));
+  listeners.Append(new SequenceTestingListener(&vec, "2"));
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+  ASSERT_EQ(3, vec.size());
+  ASSERT_STREQ("0", vec.GetElement(0));
+  ASSERT_STREQ("1", vec.GetElement(1));
+  ASSERT_STREQ("2", vec.GetElement(2));
+}
+
+// Tests that a listener removed from an EventListeners list stops receiving
+// events and is not deleted when the list is destroyed.
+TEST(EventListenersTest, Release) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  // Although Append passes the ownership of this object to the list,
+  // the following calls release it, and we need to delete it before the
+  // test ends.
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+  {
+    EventListeners listeners;
+    listeners.Append(listener);
+    EXPECT_EQ(listener, listeners.Release(listener));
+    EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+        *UnitTest::GetInstance());
+    EXPECT_TRUE(listeners.Release(listener) == NULL);
+  }
+  EXPECT_EQ(0, on_start_counter);
+  EXPECT_FALSE(is_destroyed);
+  delete listener;
+}
+
+// Tests that no events are forwarded when event forwarding is disabled.
+TEST(EventListenerTest, SuppressEventForwarding) {
+  int on_start_counter = 0;
+  TestListener* listener = new TestListener(&on_start_counter, NULL);
+
+  EventListeners listeners;
+  listeners.Append(listener);
+  ASSERT_TRUE(EventListenersAccessor::EventForwardingEnabled(listeners));
+  EventListenersAccessor::SuppressEventForwarding(&listeners);
+  ASSERT_FALSE(EventListenersAccessor::EventForwardingEnabled(listeners));
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+  EXPECT_EQ(0, on_start_counter);
+}
+
+#if GTEST_HAS_DEATH_TEST
+// Tests that events generated by Google Test are not forwarded in
+// death test subprocesses.
+TEST(EventListenerDeathTest, EventsNotForwardedInDeathTestSubprecesses) {
+  EXPECT_DEATH({  // NOLINT
+      GTEST_CHECK_(EventListenersAccessor::EventForwardingEnabled(
+          *GetUnitTestImpl()->listeners())) << "expected failure";},
+      "expected failure");
+}
+#endif  // GTEST_HAS_DEATH_TEST
+
+// Tests that a listener installed via SetDefaultResultPrinter() starts
+// receiving events and is returned via default_result_printer() and that
+// the previous default_result_printer is removed from the list and deleted.
+TEST(EventListenerTest, default_result_printer) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+
+  EventListeners listeners;
+  EventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
+
+  EXPECT_EQ(listener, listeners.default_result_printer());
+
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+
+  EXPECT_EQ(1, on_start_counter);
+
+  // Replacing default_result_printer with something else should remove it
+  // from the list and destroy it.
+  EventListenersAccessor::SetDefaultResultPrinter(&listeners, NULL);
+
+  EXPECT_TRUE(listeners.default_result_printer() == NULL);
+  EXPECT_TRUE(is_destroyed);
+
+  // After broadcasting an event the counter is still the same, indicating
+  // the listener is not in the list anymore.
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+  EXPECT_EQ(1, on_start_counter);
+}
+
+// Tests that the default_result_printer listener stops receiving events
+// when removed via Release and that is not owned by the list anymore.
+TEST(EventListenerTest, RemovingDefaultResultPrinterWorks) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  // Although Append passes the ownership of this object to the list,
+  // the following calls release it, and we need to delete it before the
+  // test ends.
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+  {
+    EventListeners listeners;
+    EventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
+
+    EXPECT_EQ(listener, listeners.Release(listener));
+    EXPECT_TRUE(listeners.default_result_printer() == NULL);
+    EXPECT_FALSE(is_destroyed);
+
+    // Broadcasting events now should not affect default_result_printer.
+    EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+        *UnitTest::GetInstance());
+    EXPECT_EQ(0, on_start_counter);
+  }
+  // Destroying the list should not affect the listener now, too.
+  EXPECT_FALSE(is_destroyed);
+  delete listener;
+}
+
+// Tests that a listener installed via SetDefaultXmlGenerator() starts
+// receiving events and is returned via default_xml_generator() and that
+// the previous default_xml_generator is removed from the list and deleted.
+TEST(EventListenerTest, default_xml_generator) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+
+  EventListeners listeners;
+  EventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
+
+  EXPECT_EQ(listener, listeners.default_xml_generator());
+
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+
+  EXPECT_EQ(1, on_start_counter);
+
+  // Replacing default_xml_generator with something else should remove it
+  // from the list and destroy it.
+  EventListenersAccessor::SetDefaultXmlGenerator(&listeners, NULL);
+
+  EXPECT_TRUE(listeners.default_xml_generator() == NULL);
+  EXPECT_TRUE(is_destroyed);
+
+  // After broadcasting an event the counter is still the same, indicating
+  // the listener is not in the list anymore.
+  EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+      *UnitTest::GetInstance());
+  EXPECT_EQ(1, on_start_counter);
+}
+
+// Tests that the default_xml_generator listener stops receiving events
+// when removed via Release and that is not owned by the list anymore.
+TEST(EventListenerTest, RemovingDefaultXmlGeneratorWorks) {
+  int on_start_counter = 0;
+  bool is_destroyed = false;
+  // Although Append passes the ownership of this object to the list,
+  // the following calls release it, and we need to delete it before the
+  // test ends.
+  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
+  {
+    EventListeners listeners;
+    EventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
+
+    EXPECT_EQ(listener, listeners.Release(listener));
+    EXPECT_TRUE(listeners.default_xml_generator() == NULL);
+    EXPECT_FALSE(is_destroyed);
+
+    // Broadcasting events now should not affect default_xml_generator.
+    EventListenersAccessor::GetRepeater(&listeners)->OnUnitTestStart(
+        *UnitTest::GetInstance());
+    EXPECT_EQ(0, on_start_counter);
+  }
+  // Destroying the list should not affect the listener now, too.
+  EXPECT_FALSE(is_destroyed);
+  delete listener;
+}
diff --git a/test/gtest_xml_output_unittest.py b/test/gtest_xml_output_unittest.py
index a0cd4d0..3ee6846 100755
--- a/test/gtest_xml_output_unittest.py
+++ b/test/gtest_xml_output_unittest.py
@@ -44,6 +44,7 @@ import gtest_xml_test_utils
 
 GTEST_OUTPUT_FLAG         = "--gtest_output"
 GTEST_DEFAULT_OUTPUT_FILE = "test_detail.xml"
+GTEST_PROGRAM_NAME = "gtest_xml_output_unittest_"
 
 SUPPORTS_STACK_TRACES = False
 
@@ -108,8 +109,7 @@ class GTestXMLOutputUnitTest(gtest_xml_test_utils.GTestXMLTestCase):
     Runs a test program that generates a non-empty XML output, and
     tests that the XML output is expected.
     """
-    self._TestXmlOutput("gtest_xml_output_unittest_",
-                        EXPECTED_NON_EMPTY_XML, 1)
+    self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY_XML, 1)
 
   def testEmptyXmlOutput(self):
     """
@@ -142,6 +142,35 @@ class GTestXMLOutputUnitTest(gtest_xml_test_utils.GTestXMLTestCase):
     self.assertEquals(0, p.exit_code)
     self.assert_(os.path.isfile(output_file))
 
+  def testSuppressedXmlOutput(self):
+    """
+    Tests that no XML file is generated if the default XML listener is
+    shut down before RUN_ALL_TESTS is invoked.
+    """
+
+    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
+                            GTEST_PROGRAM_NAME + "out.xml")
+    if os.path.isfile(xml_path):
+      os.remove(xml_path)
+
+    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
+
+    command = [gtest_prog_path,
+               "%s=xml:%s" % (GTEST_OUTPUT_FLAG, xml_path),
+               "--shut_down_xml"]
+    p = gtest_test_utils.Subprocess(command)
+    if p.terminated_by_signal:
+      self.assert_(False,
+                   "%s was killed by signal %d" % (gtest_prog_name, p.signal))
+    else:
+      self.assert_(p.exited)
+      self.assertEquals(1, p.exit_code,
+                        "'%s' exited with code %s, which doesn't match "
+                        "the expected exit code %s."
+                        % (command, p.exit_code, 1))
+
+    self.assert_(not os.path.isfile(xml_path))
+
 
   def _TestXmlOutput(self, gtest_prog_name, expected_xml, expected_exit_code):
     """
diff --git a/test/gtest_xml_output_unittest_.cc b/test/gtest_xml_output_unittest_.cc
index d7ce2c6..bfeda3d 100644
--- a/test/gtest_xml_output_unittest_.cc
+++ b/test/gtest_xml_output_unittest_.cc
@@ -40,6 +40,20 @@
 
 #include <gtest/gtest.h>
 
+// TODO(vladl@google.com): Remove this include when the event listener API is
+// published and GetUnitTestImpl is no longer needed.
+//
+// Indicates that this translation unit is part of Google Test's
+// implementation.  It must come before gtest-internal-inl.h is
+// included, or there will be a compiler error.  This trick is to
+// prevent a user from accidentally including gtest-internal-inl.h in
+// his code.
+#define GTEST_IMPLEMENTATION_ 1
+#include "src/gtest-internal-inl.h"
+#undef GTEST_IMPLEMENTATION_
+
+using ::testing::InitGoogleTest;
+
 class SuccessfulTest : public testing::Test {
 };
 
@@ -118,3 +132,17 @@ TEST(NoFixtureTest, ExternalUtilityThatCallsRecordIntValuedProperty) {
 TEST(NoFixtureTest, ExternalUtilityThatCallsRecordStringValuedProperty) {
   ExternalUtilityThatCallsRecordProperty("key_for_utility_string", "1");
 }
+
+int main(int argc, char** argv) {
+  InitGoogleTest(&argc, argv);
+
+  if (argc > 1 && strcmp(argv[1], "--shut_down_xml") == 0) {
+    // TODO(vladl@google.com): Replace GetUnitTestImpl()->listeners() with
+    // UnitTest::GetInstance()->listeners() when the event listener API is
+    // published.
+    ::testing::internal::EventListeners& listeners =
+        *::testing::internal::GetUnitTestImpl()->listeners();
+    delete listeners.Release(listeners.default_xml_generator());
+  }
+  return RUN_ALL_TESTS();
+}