Retry to checkin a version of gmock, modified to use our boost_tuple in VS2005.

testing/gmock/test/gmock-actions_test.cc

Index: testing/gmock/test/gmock-actions_test.cc
diff --git a/testing/gmock/test/gmock-actions_test.cc b/testing/gmock/test/gmock-actions_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..24462609aefaa6b200f2f0619bb8f18c042a847b
--- /dev/null
+++ b/testing/gmock/test/gmock-actions_test.cc
@@ -0,0 +1,1034 @@
+// Copyright 2007, 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: wan@google.com (Zhanyong Wan)
+
+// Google Mock - a framework for writing C++ mock classes.
+//
+// This file tests the built-in actions.
+
+#include <gmock/gmock-actions.h>
+#include <algorithm>
+#include <iterator>
+#include <string>
+#include <gmock/gmock.h>
+#include <gmock/internal/gmock-port.h>
+#include <gtest/gtest.h>
+#include <gtest/gtest-spi.h>
+
+namespace {
+
+using ::std::tr1::get;
+using ::std::tr1::make_tuple;
+using ::std::tr1::tuple;
+using ::std::tr1::tuple_element;
+using testing::internal::BuiltInDefaultValue;
+using testing::internal::Int64;
+using testing::internal::UInt64;
+// This list should be kept sorted.
+using testing::_;
+using testing::Action;
+using testing::ActionInterface;
+using testing::Assign;
+using testing::DefaultValue;
+using testing::DoDefault;
+using testing::IgnoreResult;
+using testing::Invoke;
+using testing::InvokeWithoutArgs;
+using testing::MakePolymorphicAction;
+using testing::Ne;
+using testing::PolymorphicAction;
+using testing::Return;
+using testing::ReturnNull;
+using testing::ReturnRef;
+using testing::SetArgumentPointee;
+using testing::SetArrayArgument;
+
+#ifndef _WIN32_WCE
+using testing::SetErrnoAndReturn;
+#endif  // _WIN32_WCE
+
+#if GMOCK_HAS_PROTOBUF_
+using testing::internal::TestMessage;
+#endif  // GMOCK_HAS_PROTOBUF_
+
+// Tests that BuiltInDefaultValue<T*>::Get() returns NULL.
+TEST(BuiltInDefaultValueTest, IsNullForPointerTypes) {
+  EXPECT_TRUE(BuiltInDefaultValue<int*>::Get() == NULL);
+  EXPECT_TRUE(BuiltInDefaultValue<const char*>::Get() == NULL);
+  EXPECT_TRUE(BuiltInDefaultValue<void*>::Get() == NULL);
+}
+
+// Tests that BuiltInDefaultValue<T*>::Exists() return true.
+TEST(BuiltInDefaultValueTest, ExistsForPointerTypes) {
+  EXPECT_TRUE(BuiltInDefaultValue<int*>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<const char*>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<void*>::Exists());
+}
+
+// Tests that BuiltInDefaultValue<T>::Get() returns 0 when T is a
+// built-in numeric type.
+TEST(BuiltInDefaultValueTest, IsZeroForNumericTypes) {
+  EXPECT_EQ(0, BuiltInDefaultValue<unsigned char>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<signed char>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<char>::Get());
+#if !GTEST_OS_WINDOWS
+  EXPECT_EQ(0, BuiltInDefaultValue<unsigned wchar_t>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<signed wchar_t>::Get());
+#endif  // !GTEST_OS_WINDOWS
+  EXPECT_EQ(0, BuiltInDefaultValue<wchar_t>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<unsigned short>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<signed short>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<short>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<unsigned int>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<signed int>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<int>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<unsigned long>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<signed long>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<long>::Get());  // NOLINT
+  EXPECT_EQ(0, BuiltInDefaultValue<UInt64>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<Int64>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<float>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<double>::Get());
+}
+
+// Tests that BuiltInDefaultValue<T>::Exists() returns true when T is a
+// built-in numeric type.
+TEST(BuiltInDefaultValueTest, ExistsForNumericTypes) {
+  EXPECT_TRUE(BuiltInDefaultValue<unsigned char>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<signed char>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<char>::Exists());
+#if !GTEST_OS_WINDOWS
+  EXPECT_TRUE(BuiltInDefaultValue<unsigned wchar_t>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<signed wchar_t>::Exists());
+#endif  // !GTEST_OS_WINDOWS
+  EXPECT_TRUE(BuiltInDefaultValue<wchar_t>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<unsigned short>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<signed short>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<short>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<unsigned int>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<signed int>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<int>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<unsigned long>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<signed long>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<long>::Exists());  // NOLINT
+  EXPECT_TRUE(BuiltInDefaultValue<UInt64>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<Int64>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<float>::Exists());
+  EXPECT_TRUE(BuiltInDefaultValue<double>::Exists());
+}
+
+// Tests that BuiltInDefaultValue<bool>::Get() returns false.
+TEST(BuiltInDefaultValueTest, IsFalseForBool) {
+  EXPECT_FALSE(BuiltInDefaultValue<bool>::Get());
+}
+
+// Tests that BuiltInDefaultValue<bool>::Exists() returns true.
+TEST(BuiltInDefaultValueTest, BoolExists) {
+  EXPECT_TRUE(BuiltInDefaultValue<bool>::Exists());
+}
+
+// Tests that BuiltInDefaultValue<T>::Get() returns "" when T is a
+// string type.
+TEST(BuiltInDefaultValueTest, IsEmptyStringForString) {
+#if GTEST_HAS_GLOBAL_STRING
+  EXPECT_EQ("", BuiltInDefaultValue< ::string>::Get());
+#endif  // GTEST_HAS_GLOBAL_STRING
+
+#if GTEST_HAS_STD_STRING
+  EXPECT_EQ("", BuiltInDefaultValue< ::std::string>::Get());
+#endif  // GTEST_HAS_STD_STRING
+}
+
+// Tests that BuiltInDefaultValue<T>::Exists() returns true when T is a
+// string type.
+TEST(BuiltInDefaultValueTest, ExistsForString) {
+#if GTEST_HAS_GLOBAL_STRING
+  EXPECT_TRUE(BuiltInDefaultValue< ::string>::Exists());
+#endif  // GTEST_HAS_GLOBAL_STRING
+
+#if GTEST_HAS_STD_STRING
+  EXPECT_TRUE(BuiltInDefaultValue< ::std::string>::Exists());
+#endif  // GTEST_HAS_STD_STRING
+}
+
+// Tests that BuiltInDefaultValue<const T>::Get() returns the same
+// value as BuiltInDefaultValue<T>::Get() does.
+TEST(BuiltInDefaultValueTest, WorksForConstTypes) {
+  EXPECT_EQ("", BuiltInDefaultValue<const std::string>::Get());
+  EXPECT_EQ(0, BuiltInDefaultValue<const int>::Get());
+  EXPECT_TRUE(BuiltInDefaultValue<char* const>::Get() == NULL);
+  EXPECT_FALSE(BuiltInDefaultValue<const bool>::Get());
+}
+
+// Tests that BuiltInDefaultValue<T>::Get() aborts the program with
+// the correct error message when T is a user-defined type.
+struct UserType {
+  UserType() : value(0) {}
+
+  int value;
+};
+
+TEST(BuiltInDefaultValueTest, UserTypeHasNoDefault) {
+  EXPECT_FALSE(BuiltInDefaultValue<UserType>::Exists());
+}
+
+#if GTEST_HAS_DEATH_TEST
+
+// Tests that BuiltInDefaultValue<T&>::Get() aborts the program.
+TEST(BuiltInDefaultValueDeathTest, IsUndefinedForReferences) {
+  EXPECT_DEATH({  // NOLINT
+    BuiltInDefaultValue<int&>::Get();
+  }, "");
+  EXPECT_DEATH({  // NOLINT
+    BuiltInDefaultValue<const char&>::Get();
+  }, "");
+}
+
+TEST(BuiltInDefaultValueDeathTest, IsUndefinedForUserTypes) {
+  EXPECT_DEATH({  // NOLINT
+    BuiltInDefaultValue<UserType>::Get();
+  }, "");
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+// Tests that DefaultValue<T>::IsSet() is false initially.
+TEST(DefaultValueTest, IsInitiallyUnset) {
+  EXPECT_FALSE(DefaultValue<int>::IsSet());
+  EXPECT_FALSE(DefaultValue<const UserType>::IsSet());
+}
+
+// Tests that DefaultValue<T> can be set and then unset.
+TEST(DefaultValueTest, CanBeSetAndUnset) {
+  EXPECT_TRUE(DefaultValue<int>::Exists());
+  EXPECT_FALSE(DefaultValue<const UserType>::Exists());
+
+  DefaultValue<int>::Set(1);
+  DefaultValue<const UserType>::Set(UserType());
+
+  EXPECT_EQ(1, DefaultValue<int>::Get());
+  EXPECT_EQ(0, DefaultValue<const UserType>::Get().value);
+
+  EXPECT_TRUE(DefaultValue<int>::Exists());
+  EXPECT_TRUE(DefaultValue<const UserType>::Exists());
+
+  DefaultValue<int>::Clear();
+  DefaultValue<const UserType>::Clear();
+
+  EXPECT_FALSE(DefaultValue<int>::IsSet());
+  EXPECT_FALSE(DefaultValue<const UserType>::IsSet());
+
+  EXPECT_TRUE(DefaultValue<int>::Exists());
+  EXPECT_FALSE(DefaultValue<const UserType>::Exists());
+}
+
+// Tests that DefaultValue<T>::Get() returns the
+// BuiltInDefaultValue<T>::Get() when DefaultValue<T>::IsSet() is
+// false.
+TEST(DefaultValueDeathTest, GetReturnsBuiltInDefaultValueWhenUnset) {
+  EXPECT_FALSE(DefaultValue<int>::IsSet());
+  EXPECT_TRUE(DefaultValue<int>::Exists());
+  EXPECT_FALSE(DefaultValue<UserType>::IsSet());
+  EXPECT_FALSE(DefaultValue<UserType>::Exists());
+
+  EXPECT_EQ(0, DefaultValue<int>::Get());
+
+#if GTEST_HAS_DEATH_TEST
+  EXPECT_DEATH({  // NOLINT
+    DefaultValue<UserType>::Get();
+  }, "");
+#endif  // GTEST_HAS_DEATH_TEST
+}
+
+// Tests that DefaultValue<void>::Get() returns void.
+TEST(DefaultValueTest, GetWorksForVoid) {
+  return DefaultValue<void>::Get();
+}
+
+// Tests using DefaultValue with a reference type.
+
+// Tests that DefaultValue<T&>::IsSet() is false initially.
+TEST(DefaultValueOfReferenceTest, IsInitiallyUnset) {
+  EXPECT_FALSE(DefaultValue<int&>::IsSet());
+  EXPECT_FALSE(DefaultValue<UserType&>::IsSet());
+}
+
+// Tests that DefaultValue<T&>::Exists is false initiallly.
+TEST(DefaultValueOfReferenceTest, IsInitiallyNotExisting) {
+  EXPECT_FALSE(DefaultValue<int&>::Exists());
+  EXPECT_FALSE(DefaultValue<UserType&>::Exists());
+}
+
+// Tests that DefaultValue<T&> can be set and then unset.
+TEST(DefaultValueOfReferenceTest, CanBeSetAndUnset) {
+  int n = 1;
+  DefaultValue<const int&>::Set(n);
+  UserType u;
+  DefaultValue<UserType&>::Set(u);
+
+  EXPECT_TRUE(DefaultValue<const int&>::Exists());
+  EXPECT_TRUE(DefaultValue<UserType&>::Exists());
+
+  EXPECT_EQ(&n, &(DefaultValue<const int&>::Get()));
+  EXPECT_EQ(&u, &(DefaultValue<UserType&>::Get()));
+
+  DefaultValue<const int&>::Clear();
+  DefaultValue<UserType&>::Clear();
+
+  EXPECT_FALSE(DefaultValue<const int&>::Exists());
+  EXPECT_FALSE(DefaultValue<UserType&>::Exists());
+
+  EXPECT_FALSE(DefaultValue<const int&>::IsSet());
+  EXPECT_FALSE(DefaultValue<UserType&>::IsSet());
+}
+
+// Tests that DefaultValue<T&>::Get() returns the
+// BuiltInDefaultValue<T&>::Get() when DefaultValue<T&>::IsSet() is
+// false.
+TEST(DefaultValueOfReferenceDeathTest, GetReturnsBuiltInDefaultValueWhenUnset) {
+  EXPECT_FALSE(DefaultValue<int&>::IsSet());
+  EXPECT_FALSE(DefaultValue<UserType&>::IsSet());
+
+#if GTEST_HAS_DEATH_TEST
+  EXPECT_DEATH({  // NOLINT
+    DefaultValue<int&>::Get();
+  }, "");
+  EXPECT_DEATH({  // NOLINT
+    DefaultValue<UserType>::Get();
+  }, "");
+#endif  // GTEST_HAS_DEATH_TEST
+}
+
+// Tests that ActionInterface can be implemented by defining the
+// Perform method.
+
+typedef int MyFunction(bool, int);
+
+class MyActionImpl : public ActionInterface<MyFunction> {
+ public:
+  virtual int Perform(const tuple<bool, int>& args) {
+    return get<0>(args) ? get<1>(args) : 0;
+  }
+};
+
+TEST(ActionInterfaceTest, CanBeImplementedByDefiningPerform) {
+  MyActionImpl my_action_impl;
+
+  EXPECT_FALSE(my_action_impl.IsDoDefault());
+}
+
+TEST(ActionInterfaceTest, MakeAction) {
+  Action<MyFunction> action = MakeAction(new MyActionImpl);
+
+  // When exercising the Perform() method of Action<F>, we must pass
+  // it a tuple whose size and type are compatible with F's argument
+  // types.  For example, if F is int(), then Perform() takes a
+  // 0-tuple; if F is void(bool, int), then Perform() takes a
+  // tuple<bool, int>, and so on.
+  EXPECT_EQ(5, action.Perform(make_tuple(true, 5)));
+}
+
+// Tests that Action<F> can be contructed from a pointer to
+// ActionInterface<F>.
+TEST(ActionTest, CanBeConstructedFromActionInterface) {
+  Action<MyFunction> action(new MyActionImpl);
+}
+
+// Tests that Action<F> delegates actual work to ActionInterface<F>.
+TEST(ActionTest, DelegatesWorkToActionInterface) {
+  const Action<MyFunction> action(new MyActionImpl);
+
+  EXPECT_EQ(5, action.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, action.Perform(make_tuple(false, 1)));
+}
+
+// Tests that Action<F> can be copied.
+TEST(ActionTest, IsCopyable) {
+  Action<MyFunction> a1(new MyActionImpl);
+  Action<MyFunction> a2(a1);  // Tests the copy constructor.
+
+  // a1 should continue to work after being copied from.
+  EXPECT_EQ(5, a1.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, a1.Perform(make_tuple(false, 1)));
+
+  // a2 should work like the action it was copied from.
+  EXPECT_EQ(5, a2.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, a2.Perform(make_tuple(false, 1)));
+
+  a2 = a1;  // Tests the assignment operator.
+
+  // a1 should continue to work after being copied from.
+  EXPECT_EQ(5, a1.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, a1.Perform(make_tuple(false, 1)));
+
+  // a2 should work like the action it was copied from.
+  EXPECT_EQ(5, a2.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, a2.Perform(make_tuple(false, 1)));
+}
+
+// Tests that an Action<From> object can be converted to a
+// compatible Action<To> object.
+
+class IsNotZero : public ActionInterface<bool(int)> {  // NOLINT
+ public:
+  virtual bool Perform(const tuple<int>& arg) {
+    return get<0>(arg) != 0;
+  }
+};
+
+TEST(ActionTest, CanBeConvertedToOtherActionType) {
+  const Action<bool(int)> a1(new IsNotZero);  // NOLINT
+  const Action<int(char)> a2 = Action<int(char)>(a1);  // NOLINT
+  EXPECT_EQ(1, a2.Perform(make_tuple('a')));
+  EXPECT_EQ(0, a2.Perform(make_tuple('\0')));
+}
+
+// The following two classes are for testing MakePolymorphicAction().
+
+// Implements a polymorphic action that returns the second of the
+// arguments it receives.
+class ReturnSecondArgumentAction {
+ public:
+  // We want to verify that MakePolymorphicAction() can work with a
+  // polymorphic action whose Perform() method template is either
+  // const or not.  This lets us verify the non-const case.
+  template <typename Result, typename ArgumentTuple>
+  Result Perform(const ArgumentTuple& args) { return get<1>(args); }
+};
+
+// Implements a polymorphic action that can be used in a nullary
+// function to return 0.
+class ReturnZeroFromNullaryFunctionAction {
+ public:
+  // For testing that MakePolymorphicAction() works when the
+  // implementation class' Perform() method template takes only one
+  // template parameter.
+  //
+  // We want to verify that MakePolymorphicAction() can work with a
+  // polymorphic action whose Perform() method template is either
+  // const or not.  This lets us verify the const case.
+  template <typename Result>
+  Result Perform(const tuple<>&) const { return 0; }
+};
+
+// These functions verify that MakePolymorphicAction() returns a
+// PolymorphicAction<T> where T is the argument's type.
+
+PolymorphicAction<ReturnSecondArgumentAction> ReturnSecondArgument() {
+  return MakePolymorphicAction(ReturnSecondArgumentAction());
+}
+
+PolymorphicAction<ReturnZeroFromNullaryFunctionAction>
+ReturnZeroFromNullaryFunction() {
+  return MakePolymorphicAction(ReturnZeroFromNullaryFunctionAction());
+}
+
+// Tests that MakePolymorphicAction() turns a polymorphic action
+// implementation class into a polymorphic action.
+TEST(MakePolymorphicActionTest, ConstructsActionFromImpl) {
+  Action<int(bool, int, double)> a1 = ReturnSecondArgument();  // NOLINT
+  EXPECT_EQ(5, a1.Perform(make_tuple(false, 5, 2.0)));
+}
+
+// Tests that MakePolymorphicAction() works when the implementation
+// class' Perform() method template has only one template parameter.
+TEST(MakePolymorphicActionTest, WorksWhenPerformHasOneTemplateParameter) {
+  Action<int()> a1 = ReturnZeroFromNullaryFunction();
+  EXPECT_EQ(0, a1.Perform(make_tuple()));
+
+  Action<void*()> a2 = ReturnZeroFromNullaryFunction();
+  EXPECT_TRUE(a2.Perform(make_tuple()) == NULL);
+}
+
+// Tests that Return() works as an action for void-returning
+// functions.
+TEST(ReturnTest, WorksForVoid) {
+  const Action<void(int)> ret = Return();  // NOLINT
+  return ret.Perform(make_tuple(1));
+}
+
+// Tests that Return(v) returns v.
+TEST(ReturnTest, ReturnsGivenValue) {
+  Action<int()> ret = Return(1);  // NOLINT
+  EXPECT_EQ(1, ret.Perform(make_tuple()));
+
+  ret = Return(-5);
+  EXPECT_EQ(-5, ret.Perform(make_tuple()));
+}
+
+// Tests that Return("string literal") works.
+TEST(ReturnTest, AcceptsStringLiteral) {
+  Action<const char*()> a1 = Return("Hello");
+  EXPECT_STREQ("Hello", a1.Perform(make_tuple()));
+
+  Action<std::string()> a2 = Return("world");
+  EXPECT_EQ("world", a2.Perform(make_tuple()));
+}
+
+// Tests that Return(v) is covaraint.
+
+struct Base {
+  bool operator==(const Base&) { return true; }
+};
+
+struct Derived : public Base {
+  bool operator==(const Derived&) { return true; }
+};
+
+TEST(ReturnTest, IsCovariant) {
+  Base base;
+  Derived derived;
+  Action<Base*()> ret = Return(&base);
+  EXPECT_EQ(&base, ret.Perform(make_tuple()));
+
+  ret = Return(&derived);
+  EXPECT_EQ(&derived, ret.Perform(make_tuple()));
+}
+
+// Tests that ReturnNull() returns NULL in a pointer-returning function.
+TEST(ReturnNullTest, WorksInPointerReturningFunction) {
+  const Action<int*()> a1 = ReturnNull();
+  EXPECT_TRUE(a1.Perform(make_tuple()) == NULL);
+
+  const Action<const char*(bool)> a2 = ReturnNull();  // NOLINT
+  EXPECT_TRUE(a2.Perform(make_tuple(true)) == NULL);
+}
+
+// Tests that ReturnRef(v) works for reference types.
+TEST(ReturnRefTest, WorksForReference) {
+  const int n = 0;
+  const Action<const int&(bool)> ret = ReturnRef(n);  // NOLINT
+
+  EXPECT_EQ(&n, &ret.Perform(make_tuple(true)));
+}
+
+// Tests that ReturnRef(v) is covariant.
+TEST(ReturnRefTest, IsCovariant) {
+  Base base;
+  Derived derived;
+  Action<Base&()> a = ReturnRef(base);
+  EXPECT_EQ(&base, &a.Perform(make_tuple()));
+
+  a = ReturnRef(derived);
+  EXPECT_EQ(&derived, &a.Perform(make_tuple()));
+}
+
+// Tests that DoDefault() does the default action for the mock method.
+
+class MyClass {};
+
+class MockClass {
+ public:
+  MOCK_METHOD1(IntFunc, int(bool flag));  // NOLINT
+  MOCK_METHOD0(Foo, MyClass());
+};
+
+// Tests that DoDefault() returns the built-in default value for the
+// return type by default.
+TEST(DoDefaultTest, ReturnsBuiltInDefaultValueByDefault) {
+  MockClass mock;
+  EXPECT_CALL(mock, IntFunc(_))
+      .WillOnce(DoDefault());
+  EXPECT_EQ(0, mock.IntFunc(true));
+}
+
+#if GTEST_HAS_DEATH_TEST
+
+// Tests that DoDefault() aborts the process when there is no built-in
+// default value for the return type.
+TEST(DoDefaultDeathTest, DiesForUnknowType) {
+  MockClass mock;
+  EXPECT_CALL(mock, Foo())
+      .WillRepeatedly(DoDefault());
+  EXPECT_DEATH({  // NOLINT
+    mock.Foo();
+  }, "");
+}
+
+// Tests that using DoDefault() inside a composite action leads to a
+// run-time error.
+
+void VoidFunc(bool flag) {}
+
+TEST(DoDefaultDeathTest, DiesIfUsedInCompositeAction) {
+  MockClass mock;
+  EXPECT_CALL(mock, IntFunc(_))
+      .WillRepeatedly(DoAll(Invoke(VoidFunc),
+                            DoDefault()));
+
+  // Ideally we should verify the error message as well.  Sadly,
+  // EXPECT_DEATH() can only capture stderr, while Google Mock's
+  // errors are printed on stdout.  Therefore we have to settle for
+  // not verifying the message.
+  EXPECT_DEATH({  // NOLINT
+    mock.IntFunc(true);
+  }, "");
+}
+
+#endif  // GTEST_HAS_DEATH_TEST
+
+// Tests that DoDefault() returns the default value set by
+// DefaultValue<T>::Set() when it's not overriden by an ON_CALL().
+TEST(DoDefaultTest, ReturnsUserSpecifiedPerTypeDefaultValueWhenThereIsOne) {
+  DefaultValue<int>::Set(1);
+  MockClass mock;
+  EXPECT_CALL(mock, IntFunc(_))
+      .WillOnce(DoDefault());
+  EXPECT_EQ(1, mock.IntFunc(false));
+  DefaultValue<int>::Clear();
+}
+
+// Tests that DoDefault() does the action specified by ON_CALL().
+TEST(DoDefaultTest, DoesWhatOnCallSpecifies) {
+  MockClass mock;
+  ON_CALL(mock, IntFunc(_))
+      .WillByDefault(Return(2));
+  EXPECT_CALL(mock, IntFunc(_))
+      .WillOnce(DoDefault());
+  EXPECT_EQ(2, mock.IntFunc(false));
+}
+
+// Tests that using DoDefault() in ON_CALL() leads to a run-time failure.
+TEST(DoDefaultTest, CannotBeUsedInOnCall) {
+  MockClass mock;
+  EXPECT_NONFATAL_FAILURE({  // NOLINT
+    ON_CALL(mock, IntFunc(_))
+      .WillByDefault(DoDefault());
+  }, "DoDefault() cannot be used in ON_CALL()");
+}
+
+// Tests that SetArgumentPointee<N>(v) sets the variable pointed to by
+// the N-th (0-based) argument to v.
+TEST(SetArgumentPointeeTest, SetsTheNthPointee) {
+  typedef void MyFunction(bool, int*, char*);
+  Action<MyFunction> a = SetArgumentPointee<1>(2);
+
+  int n = 0;
+  char ch = '\0';
+  a.Perform(make_tuple(true, &n, &ch));
+  EXPECT_EQ(2, n);
+  EXPECT_EQ('\0', ch);
+
+  a = SetArgumentPointee<2>('a');
+  n = 0;
+  ch = '\0';
+  a.Perform(make_tuple(true, &n, &ch));
+  EXPECT_EQ(0, n);
+  EXPECT_EQ('a', ch);
+}
+
+#if GMOCK_HAS_PROTOBUF_
+
+// Tests that SetArgumentPointee<N>(proto_buffer) sets the v1 protobuf
+// variable pointed to by the N-th (0-based) argument to proto_buffer.
+TEST(SetArgumentPointeeTest, SetsTheNthPointeeOfProtoBufferType) {
+  TestMessage* const msg = new TestMessage;
+  msg->set_member("yes");
+  TestMessage orig_msg;
+  orig_msg.CopyFrom(*msg);
+
+  Action<void(bool, TestMessage*)> a = SetArgumentPointee<1>(*msg);
+  // SetArgumentPointee<N>(proto_buffer) makes a copy of proto_buffer
+  // s.t. the action works even when the original proto_buffer has
+  // died.  We ensure this behavior by deleting msg before using the
+  // action.
+  delete msg;
+
+  TestMessage dest;
+  EXPECT_FALSE(orig_msg.Equals(dest));
+  a.Perform(make_tuple(true, &dest));
+  EXPECT_TRUE(orig_msg.Equals(dest));
+}
+
+// Tests that SetArgumentPointee<N>(proto_buffer) sets the
+// ::ProtocolMessage variable pointed to by the N-th (0-based)
+// argument to proto_buffer.
+TEST(SetArgumentPointeeTest, SetsTheNthPointeeOfProtoBufferBaseType) {
+  TestMessage* const msg = new TestMessage;
+  msg->set_member("yes");
+  TestMessage orig_msg;
+  orig_msg.CopyFrom(*msg);
+
+  Action<void(bool, ::ProtocolMessage*)> a = SetArgumentPointee<1>(*msg);
+  // SetArgumentPointee<N>(proto_buffer) makes a copy of proto_buffer
+  // s.t. the action works even when the original proto_buffer has
+  // died.  We ensure this behavior by deleting msg before using the
+  // action.
+  delete msg;
+
+  TestMessage dest;
+  ::ProtocolMessage* const dest_base = &dest;
+  EXPECT_FALSE(orig_msg.Equals(dest));
+  a.Perform(make_tuple(true, dest_base));
+  EXPECT_TRUE(orig_msg.Equals(dest));
+}
+
+// Tests that SetArgumentPointee<N>(proto2_buffer) sets the v2
+// protobuf variable pointed to by the N-th (0-based) argument to
+// proto2_buffer.
+TEST(SetArgumentPointeeTest, SetsTheNthPointeeOfProto2BufferType) {
+  using testing::internal::FooMessage;
+  FooMessage* const msg = new FooMessage;
+  msg->set_int_field(2);
+  msg->set_string_field("hi");
+  FooMessage orig_msg;
+  orig_msg.CopyFrom(*msg);
+
+  Action<void(bool, FooMessage*)> a = SetArgumentPointee<1>(*msg);
+  // SetArgumentPointee<N>(proto2_buffer) makes a copy of
+  // proto2_buffer s.t. the action works even when the original
+  // proto2_buffer has died.  We ensure this behavior by deleting msg
+  // before using the action.
+  delete msg;
+
+  FooMessage dest;
+  dest.set_int_field(0);
+  a.Perform(make_tuple(true, &dest));
+  EXPECT_EQ(2, dest.int_field());
+  EXPECT_EQ("hi", dest.string_field());
+}
+
+// Tests that SetArgumentPointee<N>(proto2_buffer) sets the
+// proto2::Message variable pointed to by the N-th (0-based) argument
+// to proto2_buffer.
+TEST(SetArgumentPointeeTest, SetsTheNthPointeeOfProto2BufferBaseType) {
+  using testing::internal::FooMessage;
+  FooMessage* const msg = new FooMessage;
+  msg->set_int_field(2);
+  msg->set_string_field("hi");
+  FooMessage orig_msg;
+  orig_msg.CopyFrom(*msg);
+
+  Action<void(bool, ::proto2::Message*)> a = SetArgumentPointee<1>(*msg);
+  // SetArgumentPointee<N>(proto2_buffer) makes a copy of
+  // proto2_buffer s.t. the action works even when the original
+  // proto2_buffer has died.  We ensure this behavior by deleting msg
+  // before using the action.
+  delete msg;
+
+  FooMessage dest;
+  dest.set_int_field(0);
+  ::proto2::Message* const dest_base = &dest;
+  a.Perform(make_tuple(true, dest_base));
+  EXPECT_EQ(2, dest.int_field());
+  EXPECT_EQ("hi", dest.string_field());
+}
+
+#endif  // GMOCK_HAS_PROTOBUF_
+
+// Tests that SetArrayArgument<N>(first, last) sets the elements of the array
+// pointed to by the N-th (0-based) argument to values in range [first, last).
+TEST(SetArrayArgumentTest, SetsTheNthArray) {
+  typedef void MyFunction(bool, int*, char*);
+  int numbers[] = { 1, 2, 3 };
+  Action<MyFunction> a = SetArrayArgument<1>(numbers, numbers + 3);
+
+  int n[4] = {};
+  int* pn = n;
+  char ch[4] = {};
+  char* pch = ch;
+  a.Perform(make_tuple(true, pn, pch));
+  EXPECT_EQ(1, n[0]);
+  EXPECT_EQ(2, n[1]);
+  EXPECT_EQ(3, n[2]);
+  EXPECT_EQ(0, n[3]);
+  EXPECT_EQ('\0', ch[0]);
+  EXPECT_EQ('\0', ch[1]);
+  EXPECT_EQ('\0', ch[2]);
+  EXPECT_EQ('\0', ch[3]);
+
+  // Tests first and last are iterators.
+  std::string letters = "abc";
+  a = SetArrayArgument<2>(letters.begin(), letters.end());
+  std::fill_n(n, 4, 0);
+  std::fill_n(ch, 4, '\0');
+  a.Perform(make_tuple(true, pn, pch));
+  EXPECT_EQ(0, n[0]);
+  EXPECT_EQ(0, n[1]);
+  EXPECT_EQ(0, n[2]);
+  EXPECT_EQ(0, n[3]);
+  EXPECT_EQ('a', ch[0]);
+  EXPECT_EQ('b', ch[1]);
+  EXPECT_EQ('c', ch[2]);
+  EXPECT_EQ('\0', ch[3]);
+}
+
+// Tests SetArrayArgument<N>(first, last) where first == last.
+TEST(SetArrayArgumentTest, SetsTheNthArrayWithEmptyRange) {
+  typedef void MyFunction(bool, int*);
+  int numbers[] = { 1, 2, 3 };
+  Action<MyFunction> a = SetArrayArgument<1>(numbers, numbers);
+
+  int n[4] = {};
+  int* pn = n;
+  a.Perform(make_tuple(true, pn));
+  EXPECT_EQ(0, n[0]);
+  EXPECT_EQ(0, n[1]);
+  EXPECT_EQ(0, n[2]);
+  EXPECT_EQ(0, n[3]);
+}
+
+// Tests SetArrayArgument<N>(first, last) where *first is convertible
+// (but not equal) to the argument type.
+TEST(SetArrayArgumentTest, SetsTheNthArrayWithConvertibleType) {
+  typedef void MyFunction(bool, char*);
+  int codes[] = { 97, 98, 99 };
+  Action<MyFunction> a = SetArrayArgument<1>(codes, codes + 3);
+
+  char ch[4] = {};
+  char* pch = ch;
+  a.Perform(make_tuple(true, pch));
+  EXPECT_EQ('a', ch[0]);
+  EXPECT_EQ('b', ch[1]);
+  EXPECT_EQ('c', ch[2]);
+  EXPECT_EQ('\0', ch[3]);
+}
+
+// Test SetArrayArgument<N>(first, last) with iterator as argument.
+TEST(SetArrayArgumentTest, SetsTheNthArrayWithIteratorArgument) {
+  typedef void MyFunction(bool, std::back_insert_iterator<std::string>);
+  std::string letters = "abc";
+  Action<MyFunction> a = SetArrayArgument<1>(letters.begin(), letters.end());
+
+  std::string s;
+  a.Perform(make_tuple(true, back_inserter(s)));
+  EXPECT_EQ(letters, s);
+}
+
+// Sample functions and functors for testing Invoke() and etc.
+int Nullary() { return 1; }
+
+class NullaryFunctor {
+ public:
+  int operator()() { return 2; }
+};
+
+bool g_done = false;
+void VoidNullary() { g_done = true; }
+
+class VoidNullaryFunctor {
+ public:
+  void operator()() { g_done = true; }
+};
+
+bool Unary(int x) { return x < 0; }
+
+const char* Plus1(const char* s) { return s + 1; }
+
+void VoidUnary(int n) { g_done = true; }
+
+bool ByConstRef(const std::string& s) { return s == "Hi"; }
+
+const double g_double = 0;
+bool ReferencesGlobalDouble(const double& x) { return &x == &g_double; }
+
+std::string ByNonConstRef(std::string& s) { return s += "+"; }  // NOLINT
+
+struct UnaryFunctor {
+  int operator()(bool x) { return x ? 1 : -1; }
+};
+
+const char* Binary(const char* input, short n) { return input + n; }  // NOLINT
+
+void VoidBinary(int, char) { g_done = true; }
+
+int Ternary(int x, char y, short z) { return x + y + z; }  // NOLINT
+
+void VoidTernary(int, char, bool) { g_done = true; }
+
+int SumOf4(int a, int b, int c, int d) { return a + b + c + d; }
+
+void VoidFunctionWithFourArguments(char, int, float, double) { g_done = true; }
+
+int SumOf5(int a, int b, int c, int d, int e) { return a + b + c + d + e; }
+
+struct SumOf5Functor {
+  int operator()(int a, int b, int c, int d, int e) {
+    return a + b + c + d + e;
+  }
+};
+
+int SumOf6(int a, int b, int c, int d, int e, int f) {
+  return a + b + c + d + e + f;
+}
+
+struct SumOf6Functor {
+  int operator()(int a, int b, int c, int d, int e, int f) {
+    return a + b + c + d + e + f;
+  }
+};
+
+class Foo {
+ public:
+  Foo() : value_(123) {}
+
+  int Nullary() const { return value_; }
+  short Unary(long x) { return static_cast<short>(value_ + x); }  // NOLINT
+  std::string Binary(const std::string& str, char c) const { return str + c; }
+  int Ternary(int x, bool y, char z) { return value_ + x + y*z; }
+  int SumOf4(int a, int b, int c, int d) const {
+    return a + b + c + d + value_;
+  }
+  int SumOf5(int a, int b, int c, int d, int e) { return a + b + c + d + e; }
+  int SumOf6(int a, int b, int c, int d, int e, int f) {
+    return a + b + c + d + e + f;
+  }
+ private:
+  int value_;
+};
+
+// Tests InvokeWithoutArgs(function).
+TEST(InvokeWithoutArgsTest, Function) {
+  // As an action that takes one argument.
+  Action<int(int)> a = InvokeWithoutArgs(Nullary);  // NOLINT
+  EXPECT_EQ(1, a.Perform(make_tuple(2)));
+
+  // As an action that takes two arguments.
+  Action<short(int, double)> a2 = InvokeWithoutArgs(Nullary);  // NOLINT
+  EXPECT_EQ(1, a2.Perform(make_tuple(2, 3.5)));
+
+  // As an action that returns void.
+  Action<void(int)> a3 = InvokeWithoutArgs(VoidNullary);  // NOLINT
+  g_done = false;
+  a3.Perform(make_tuple(1));
+  EXPECT_TRUE(g_done);
+}
+
+// Tests InvokeWithoutArgs(functor).
+TEST(InvokeWithoutArgsTest, Functor) {
+  // As an action that takes no argument.
+  Action<int()> a = InvokeWithoutArgs(NullaryFunctor());  // NOLINT
+  EXPECT_EQ(2, a.Perform(make_tuple()));
+
+  // As an action that takes three arguments.
+  Action<short(int, double, char)> a2 =  // NOLINT
+      InvokeWithoutArgs(NullaryFunctor());
+  EXPECT_EQ(2, a2.Perform(make_tuple(3, 3.5, 'a')));
+
+  // As an action that returns void.
+  Action<void()> a3 = InvokeWithoutArgs(VoidNullaryFunctor());
+  g_done = false;
+  a3.Perform(make_tuple());
+  EXPECT_TRUE(g_done);
+}
+
+// Tests InvokeWithoutArgs(obj_ptr, method).
+TEST(InvokeWithoutArgsTest, Method) {
+  Foo foo;
+  Action<int(bool, char)> a =  // NOLINT
+      InvokeWithoutArgs(&foo, &Foo::Nullary);
+  EXPECT_EQ(123, a.Perform(make_tuple(true, 'a')));
+}
+
+// Tests using IgnoreResult() on a polymorphic action.
+TEST(IgnoreResultTest, PolymorphicAction) {
+  Action<void(int)> a = IgnoreResult(Return(5));  // NOLINT
+  a.Perform(make_tuple(1));
+}
+
+// Tests using IgnoreResult() on a monomorphic action.
+
+int ReturnOne() {
+  g_done = true;
+  return 1;
+}
+
+TEST(IgnoreResultTest, MonomorphicAction) {
+  g_done = false;
+  Action<void()> a = IgnoreResult(Invoke(ReturnOne));
+  a.Perform(make_tuple());
+  EXPECT_TRUE(g_done);
+}
+
+// Tests using IgnoreResult() on an action that returns a class type.
+
+MyClass ReturnMyClass(double x) {
+  g_done = true;
+  return MyClass();
+}
+
+TEST(IgnoreResultTest, ActionReturningClass) {
+  g_done = false;
+  Action<void(int)> a = IgnoreResult(Invoke(ReturnMyClass));  // NOLINT
+  a.Perform(make_tuple(2));
+  EXPECT_TRUE(g_done);
+}
+
+TEST(AssignTest, Int) {
+  int x = 0;
+  Action<void(int)> a = Assign(&x, 5);
+  a.Perform(make_tuple(0));
+  EXPECT_EQ(5, x);
+}
+
+TEST(AssignTest, String) {
+  ::std::string x;
+  Action<void(void)> a = Assign(&x, "Hello, world");
+  a.Perform(make_tuple());
+  EXPECT_EQ("Hello, world", x);
+}
+
+TEST(AssignTest, CompatibleTypes) {
+  double x = 0;
+  Action<void(int)> a = Assign(&x, 5);
+  a.Perform(make_tuple(0));
+  EXPECT_DOUBLE_EQ(5, x);
+}
+
+#ifndef _WIN32_WCE
+
+class SetErrnoAndReturnTest : public testing::Test {
+ protected:
+  virtual void SetUp() { errno = 0; }
+  virtual void TearDown() { errno = 0; }
+};
+
+TEST_F(SetErrnoAndReturnTest, Int) {
+  Action<int(void)> a = SetErrnoAndReturn(ENOTTY, -5);
+  EXPECT_EQ(-5, a.Perform(make_tuple()));
+  EXPECT_EQ(ENOTTY, errno);
+}
+
+TEST_F(SetErrnoAndReturnTest, Ptr) {
+  int x;
+  Action<int*(void)> a = SetErrnoAndReturn(ENOTTY, &x);
+  EXPECT_EQ(&x, a.Perform(make_tuple()));
+  EXPECT_EQ(ENOTTY, errno);
+}
+
+TEST_F(SetErrnoAndReturnTest, CompatibleTypes) {
+  Action<double()> a = SetErrnoAndReturn(EINVAL, 5);
+  EXPECT_DOUBLE_EQ(5.0, a.Perform(make_tuple()));
+  EXPECT_EQ(EINVAL, errno);
+}
+
+#endif  // _WIN32_WCE
+
+}  // Unnamed namespace