Diffusion sp4e-homework-lars-bertil (master) Browse

gmock-actions_test.cc
d072682119f8master

gmock-actions_test.cc
View Options

			// 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.


			// Google Mock - a framework for writing C++ mock classes.
			//
			// This file tests the built-in actions.

			// Silence C4800 (C4800: 'int *const ': forcing value
			// to bool 'true' or 'false') for MSVC 15
			#ifdef _MSC_VER
			#if _MSC_VER == 1900
			# pragma warning(push)
			# pragma warning(disable:4800)
			#endif
			#endif

			#include "gmock/gmock-actions.h"
			#include <algorithm>
			#include <iterator>
			#include <memory>
			#include <string>
			#include <type_traits>
			#include "gmock/gmock.h"
			#include "gmock/internal/gmock-port.h"
			#include "gtest/gtest.h"
			#include "gtest/gtest-spi.h"

			namespace {

			// This list should be kept sorted.
			using testing::_;
			using testing::Action;
			using testing::ActionInterface;
			using testing::Assign;
			using testing::ByMove;
			using testing::ByRef;
			using testing::DefaultValue;
			using testing::DoAll;
			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::ReturnRefOfCopy;
			using testing::SetArgPointee;
			using testing::SetArgumentPointee;
			using testing::Unused;
			using testing::WithArgs;
			using testing::internal::BuiltInDefaultValue;
			using testing::internal::Int64;
			using testing::internal::UInt64;

			#if !GTEST_OS_WINDOWS_MOBILE
			using testing::SetErrnoAndReturn;
			#endif

			// Tests that BuiltInDefaultValue<T*>::Get() returns NULL.
			TEST(BuiltInDefaultValueTest, IsNullForPointerTypes) {
			EXPECT_TRUE(BuiltInDefaultValue<int*>::Get() == nullptr);
			EXPECT_TRUE(BuiltInDefaultValue<const char*>::Get() == nullptr);
			EXPECT_TRUE(BuiltInDefaultValue<void*>::Get() == nullptr);
			}

			// 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(0U, BuiltInDefaultValue<unsigned char>::Get());
			EXPECT_EQ(0, BuiltInDefaultValue<signed char>::Get());
			EXPECT_EQ(0, BuiltInDefaultValue<char>::Get());
			#if GMOCK_WCHAR_T_IS_NATIVE_
			#if !defined(__WCHAR_UNSIGNED__)
			EXPECT_EQ(0, BuiltInDefaultValue<wchar_t>::Get());
			#else
			EXPECT_EQ(0U, BuiltInDefaultValue<wchar_t>::Get());
			#endif
			#endif
			EXPECT_EQ(0U, BuiltInDefaultValue<unsigned short>::Get()); // NOLINT
			EXPECT_EQ(0, BuiltInDefaultValue<signed short>::Get()); // NOLINT
			EXPECT_EQ(0, BuiltInDefaultValue<short>::Get()); // NOLINT
			EXPECT_EQ(0U, BuiltInDefaultValue<unsigned int>::Get());
			EXPECT_EQ(0, BuiltInDefaultValue<signed int>::Get());
			EXPECT_EQ(0, BuiltInDefaultValue<int>::Get());
			EXPECT_EQ(0U, BuiltInDefaultValue<unsigned long>::Get()); // NOLINT
			EXPECT_EQ(0, BuiltInDefaultValue<signed long>::Get()); // NOLINT
			EXPECT_EQ(0, BuiltInDefaultValue<long>::Get()); // NOLINT
			EXPECT_EQ(0U, 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 GMOCK_WCHAR_T_IS_NATIVE_
			EXPECT_TRUE(BuiltInDefaultValue<wchar_t>::Exists());
			#endif
			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) {
			EXPECT_EQ("", BuiltInDefaultValue< ::std::string>::Get());
			}

			// Tests that BuiltInDefaultValue<T>::Exists() returns true when T is a
			// string type.
			TEST(BuiltInDefaultValueTest, ExistsForString) {
			EXPECT_TRUE(BuiltInDefaultValue< ::std::string>::Exists());
			}

			// 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() == nullptr);
			EXPECT_FALSE(BuiltInDefaultValue<const bool>::Get());
			}

			// A type that's default constructible.
			class MyDefaultConstructible {
			public:
			MyDefaultConstructible() : value_(42) {}

			int value() const { return value_; }

			private:
			int value_;
			};

			// A type that's not default constructible.
			class MyNonDefaultConstructible {
			public:
			// Does not have a default ctor.
			explicit MyNonDefaultConstructible(int a_value) : value_(a_value) {}

			int value() const { return value_; }

			private:
			int value_;
			};


			TEST(BuiltInDefaultValueTest, ExistsForDefaultConstructibleType) {
			EXPECT_TRUE(BuiltInDefaultValue<MyDefaultConstructible>::Exists());
			}

			TEST(BuiltInDefaultValueTest, IsDefaultConstructedForDefaultConstructibleType) {
			EXPECT_EQ(42, BuiltInDefaultValue<MyDefaultConstructible>::Get().value());
			}


			TEST(BuiltInDefaultValueTest, DoesNotExistForNonDefaultConstructibleType) {
			EXPECT_FALSE(BuiltInDefaultValue<MyNonDefaultConstructible>::Exists());
			}

			// Tests that BuiltInDefaultValue<T&>::Get() aborts the program.
			TEST(BuiltInDefaultValueDeathTest, IsUndefinedForReferences) {
			EXPECT_DEATH_IF_SUPPORTED({
			BuiltInDefaultValue<int&>::Get();
			}, "");
			EXPECT_DEATH_IF_SUPPORTED({
			BuiltInDefaultValue<const char&>::Get();
			}, "");
			}

			TEST(BuiltInDefaultValueDeathTest, IsUndefinedForNonDefaultConstructibleType) {
			EXPECT_DEATH_IF_SUPPORTED({
			BuiltInDefaultValue<MyNonDefaultConstructible>::Get();
			}, "");
			}

			// Tests that DefaultValue<T>::IsSet() is false initially.
			TEST(DefaultValueTest, IsInitiallyUnset) {
			EXPECT_FALSE(DefaultValue<int>::IsSet());
			EXPECT_FALSE(DefaultValue<MyDefaultConstructible>::IsSet());
			EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::IsSet());
			}

			// Tests that DefaultValue<T> can be set and then unset.
			TEST(DefaultValueTest, CanBeSetAndUnset) {
			EXPECT_TRUE(DefaultValue<int>::Exists());
			EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::Exists());

			DefaultValue<int>::Set(1);
			DefaultValue<const MyNonDefaultConstructible>::Set(
			MyNonDefaultConstructible(42));

			EXPECT_EQ(1, DefaultValue<int>::Get());
			EXPECT_EQ(42, DefaultValue<const MyNonDefaultConstructible>::Get().value());

			EXPECT_TRUE(DefaultValue<int>::Exists());
			EXPECT_TRUE(DefaultValue<const MyNonDefaultConstructible>::Exists());

			DefaultValue<int>::Clear();
			DefaultValue<const MyNonDefaultConstructible>::Clear();

			EXPECT_FALSE(DefaultValue<int>::IsSet());
			EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::IsSet());

			EXPECT_TRUE(DefaultValue<int>::Exists());
			EXPECT_FALSE(DefaultValue<const MyNonDefaultConstructible>::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<MyNonDefaultConstructible>::IsSet());
			EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible>::Exists());

			EXPECT_EQ(0, DefaultValue<int>::Get());

			EXPECT_DEATH_IF_SUPPORTED({
			DefaultValue<MyNonDefaultConstructible>::Get();
			}, "");
			}

			TEST(DefaultValueTest, GetWorksForMoveOnlyIfSet) {
			EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Exists());
			EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Get() == nullptr);
			DefaultValue<std::unique_ptr<int>>::SetFactory([] {
			return std::unique_ptr<int>(new int(42));
			});
			EXPECT_TRUE(DefaultValue<std::unique_ptr<int>>::Exists());
			std::unique_ptr<int> i = DefaultValue<std::unique_ptr<int>>::Get();
			EXPECT_EQ(42, *i);
			}

			// 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<MyDefaultConstructible&>::IsSet());
			EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::IsSet());
			}

			// Tests that DefaultValue<T&>::Exists is false initiallly.
			TEST(DefaultValueOfReferenceTest, IsInitiallyNotExisting) {
			EXPECT_FALSE(DefaultValue<int&>::Exists());
			EXPECT_FALSE(DefaultValue<MyDefaultConstructible&>::Exists());
			EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::Exists());
			}

			// Tests that DefaultValue<T&> can be set and then unset.
			TEST(DefaultValueOfReferenceTest, CanBeSetAndUnset) {
			int n = 1;
			DefaultValue<const int&>::Set(n);
			MyNonDefaultConstructible x(42);
			DefaultValue<MyNonDefaultConstructible&>::Set(x);

			EXPECT_TRUE(DefaultValue<const int&>::Exists());
			EXPECT_TRUE(DefaultValue<MyNonDefaultConstructible&>::Exists());

			EXPECT_EQ(&n, &(DefaultValue<const int&>::Get()));
			EXPECT_EQ(&x, &(DefaultValue<MyNonDefaultConstructible&>::Get()));

			DefaultValue<const int&>::Clear();
			DefaultValue<MyNonDefaultConstructible&>::Clear();

			EXPECT_FALSE(DefaultValue<const int&>::Exists());
			EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::Exists());

			EXPECT_FALSE(DefaultValue<const int&>::IsSet());
			EXPECT_FALSE(DefaultValue<MyNonDefaultConstructible&>::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<MyNonDefaultConstructible&>::IsSet());

			EXPECT_DEATH_IF_SUPPORTED({
			DefaultValue<int&>::Get();
			}, "");
			EXPECT_DEATH_IF_SUPPORTED({
			DefaultValue<MyNonDefaultConstructible>::Get();
			}, "");
			}

			// Tests that ActionInterface can be implemented by defining the
			// Perform method.

			typedef int MyGlobalFunction(bool, int);

			class MyActionImpl : public ActionInterface<MyGlobalFunction> {
			public:
			int Perform(const std::tuple<bool, int>& args) override {
			return std::get<0>(args) ? std::get<1>(args) : 0;
			}
			};

			TEST(ActionInterfaceTest, CanBeImplementedByDefiningPerform) {
			MyActionImpl my_action_impl;
			(void)my_action_impl;
			}

			TEST(ActionInterfaceTest, MakeAction) {
			Action<MyGlobalFunction> 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
			// std::tuple<bool, int>, and so on.
			EXPECT_EQ(5, action.Perform(std::make_tuple(true, 5)));
			}

			// Tests that Action<F> can be contructed from a pointer to
			// ActionInterface<F>.
			TEST(ActionTest, CanBeConstructedFromActionInterface) {
			Action<MyGlobalFunction> action(new MyActionImpl);
			}

			// Tests that Action<F> delegates actual work to ActionInterface<F>.
			TEST(ActionTest, DelegatesWorkToActionInterface) {
			const Action<MyGlobalFunction> action(new MyActionImpl);

			EXPECT_EQ(5, action.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, action.Perform(std::make_tuple(false, 1)));
			}

			// Tests that Action<F> can be copied.
			TEST(ActionTest, IsCopyable) {
			Action<MyGlobalFunction> a1(new MyActionImpl);
			Action<MyGlobalFunction> a2(a1); // Tests the copy constructor.

			// a1 should continue to work after being copied from.
			EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 1)));

			// a2 should work like the action it was copied from.
			EXPECT_EQ(5, a2.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, a2.Perform(std::make_tuple(false, 1)));

			a2 = a1; // Tests the assignment operator.

			// a1 should continue to work after being copied from.
			EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 1)));

			// a2 should work like the action it was copied from.
			EXPECT_EQ(5, a2.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, a2.Perform(std::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:
			bool Perform(const std::tuple<int>& arg) override {
			return std::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(std::make_tuple('a')));
			EXPECT_EQ(0, a2.Perform(std::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 std::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 std::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(std::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(std::make_tuple()));

			Action<void*()> a2 = ReturnZeroFromNullaryFunction();
			EXPECT_TRUE(a2.Perform(std::make_tuple()) == nullptr);
			}

			// Tests that Return() works as an action for void-returning
			// functions.
			TEST(ReturnTest, WorksForVoid) {
			const Action<void(int)> ret = Return(); // NOLINT
			return ret.Perform(std::make_tuple(1));
			}

			// Tests that Return(v) returns v.
			TEST(ReturnTest, ReturnsGivenValue) {
			Action<int()> ret = Return(1); // NOLINT
			EXPECT_EQ(1, ret.Perform(std::make_tuple()));

			ret = Return(-5);
			EXPECT_EQ(-5, ret.Perform(std::make_tuple()));
			}

			// Tests that Return("string literal") works.
			TEST(ReturnTest, AcceptsStringLiteral) {
			Action<const char*()> a1 = Return("Hello");
			EXPECT_STREQ("Hello", a1.Perform(std::make_tuple()));

			Action<std::string()> a2 = Return("world");
			EXPECT_EQ("world", a2.Perform(std::make_tuple()));
			}

			// Test struct which wraps a vector of integers. Used in
			// 'SupportsWrapperReturnType' test.
			struct IntegerVectorWrapper {
			std::vector<int> * v;
			IntegerVectorWrapper(std::vector<int>& _v) : v(&_v) {} // NOLINT
			};

			// Tests that Return() works when return type is a wrapper type.
			TEST(ReturnTest, SupportsWrapperReturnType) {
			// Initialize vector of integers.
			std::vector<int> v;
			for (int i = 0; i < 5; ++i) v.push_back(i);

			// Return() called with 'v' as argument. The Action will return the same data
			// as 'v' (copy) but it will be wrapped in an IntegerVectorWrapper.
			Action<IntegerVectorWrapper()> a = Return(v);
			const std::vector<int>& result = *(a.Perform(std::make_tuple()).v);
			EXPECT_THAT(result, ::testing::ElementsAre(0, 1, 2, 3, 4));
			}

			// 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(std::make_tuple()));

			ret = Return(&derived);
			EXPECT_EQ(&derived, ret.Perform(std::make_tuple()));
			}

			// Tests that the type of the value passed into Return is converted into T
			// when the action is cast to Action<T(...)> rather than when the action is
			// performed. See comments on testing::internal::ReturnAction in
			// gmock-actions.h for more information.
			class FromType {
			public:
			explicit FromType(bool* is_converted) : converted_(is_converted) {}
			bool* converted() const { return converted_; }

			private:
			bool* const converted_;

			GTEST_DISALLOW_ASSIGN_(FromType);
			};

			class ToType {
			public:
			// Must allow implicit conversion due to use in ImplicitCast_<T>.
			ToType(const FromType& x) { *x.converted() = true; } // NOLINT
			};

			TEST(ReturnTest, ConvertsArgumentWhenConverted) {
			bool converted = false;
			FromType x(&converted);
			Action<ToType()> action(Return(x));
			EXPECT_TRUE(converted) << "Return must convert its argument in its own "
			<< "conversion operator.";
			converted = false;
			action.Perform(std::tuple<>());
			EXPECT_FALSE(converted) << "Action must NOT convert its argument "
			<< "when performed.";
			}

			class DestinationType {};

			class SourceType {
			public:
			// Note: a non-const typecast operator.
			operator DestinationType() { return DestinationType(); }
			};

			TEST(ReturnTest, CanConvertArgumentUsingNonConstTypeCastOperator) {
			SourceType s;
			Action<DestinationType()> action(Return(s));
			}

			// Tests that ReturnNull() returns NULL in a pointer-returning function.
			TEST(ReturnNullTest, WorksInPointerReturningFunction) {
			const Action<int*()> a1 = ReturnNull();
			EXPECT_TRUE(a1.Perform(std::make_tuple()) == nullptr);

			const Action<const char*(bool)> a2 = ReturnNull(); // NOLINT
			EXPECT_TRUE(a2.Perform(std::make_tuple(true)) == nullptr);
			}

			// Tests that ReturnNull() returns NULL for shared_ptr and unique_ptr returning
			// functions.
			TEST(ReturnNullTest, WorksInSmartPointerReturningFunction) {
			const Action<std::unique_ptr<const int>()> a1 = ReturnNull();
			EXPECT_TRUE(a1.Perform(std::make_tuple()) == nullptr);

			const Action<std::shared_ptr<int>(std::string)> a2 = ReturnNull();
			EXPECT_TRUE(a2.Perform(std::make_tuple("foo")) == nullptr);
			}

			// 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(std::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(std::make_tuple()));

			a = ReturnRef(derived);
			EXPECT_EQ(&derived, &a.Perform(std::make_tuple()));
			}

			template <typename T, typename = decltype(ReturnRef(std::declval<T&&>()))>
			bool CanCallReturnRef(T&&) { return true; }
			bool CanCallReturnRef(Unused) { return false; }

			// Tests that ReturnRef(v) is working with non-temporaries (T&)
			TEST(ReturnRefTest, WorksForNonTemporary) {
			int scalarValue = 123;
			EXPECT_TRUE(CanCallReturnRef(scalarValue));

			std::string nonScalarValue("ABC");
			EXPECT_TRUE(CanCallReturnRef(nonScalarValue));

			const int constScalarValue{321};
			EXPECT_TRUE(CanCallReturnRef(constScalarValue));

			const std::string constNonScalarValue("CBA");
			EXPECT_TRUE(CanCallReturnRef(constNonScalarValue));
			}

			// Tests that ReturnRef(v) is not working with temporaries (T&&)
			TEST(ReturnRefTest, DoesNotWorkForTemporary) {
			auto scalarValue = []() -> int { return 123; };
			EXPECT_FALSE(CanCallReturnRef(scalarValue()));

			auto nonScalarValue = []() -> std::string { return "ABC"; };
			EXPECT_FALSE(CanCallReturnRef(nonScalarValue()));

			// cannot use here callable returning "const scalar type" because C++ ignores such const for scalar return type, so the static_cast
			EXPECT_FALSE(CanCallReturnRef(static_cast<const int>(321)));

			auto constNonScalarValue = []() -> const std::string { return "CBA"; };
			EXPECT_FALSE(CanCallReturnRef(constNonScalarValue()));
			}

			// Tests that ReturnRefOfCopy(v) works for reference types.
			TEST(ReturnRefOfCopyTest, WorksForReference) {
			int n = 42;
			const Action<const int&()> ret = ReturnRefOfCopy(n);

			EXPECT_NE(&n, &ret.Perform(std::make_tuple()));
			EXPECT_EQ(42, ret.Perform(std::make_tuple()));

			n = 43;
			EXPECT_NE(&n, &ret.Perform(std::make_tuple()));
			EXPECT_EQ(42, ret.Perform(std::make_tuple()));
			}

			// Tests that ReturnRefOfCopy(v) is covariant.
			TEST(ReturnRefOfCopyTest, IsCovariant) {
			Base base;
			Derived derived;
			Action<Base&()> a = ReturnRefOfCopy(base);
			EXPECT_NE(&base, &a.Perform(std::make_tuple()));

			a = ReturnRefOfCopy(derived);
			EXPECT_NE(&derived, &a.Perform(std::make_tuple()));
			}

			// Tests that DoDefault() does the default action for the mock method.

			class MockClass {
			public:
			MockClass() {}

			MOCK_METHOD1(IntFunc, int(bool flag)); // NOLINT
			MOCK_METHOD0(Foo, MyNonDefaultConstructible());
			MOCK_METHOD0(MakeUnique, std::unique_ptr<int>());
			MOCK_METHOD0(MakeUniqueBase, std::unique_ptr<Base>());
			MOCK_METHOD0(MakeVectorUnique, std::vector<std::unique_ptr<int>>());
			MOCK_METHOD1(TakeUnique, int(std::unique_ptr<int>));
			MOCK_METHOD2(TakeUnique,
			int(const std::unique_ptr<int>&, std::unique_ptr<int>));

			private:
			GTEST_DISALLOW_COPY_AND_ASSIGN_(MockClass);
			};

			// 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));
			}

			// Tests that DoDefault() throws (when exceptions are enabled) or 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());
			#if GTEST_HAS_EXCEPTIONS
			EXPECT_ANY_THROW(mock.Foo());
			#else
			EXPECT_DEATH_IF_SUPPORTED({
			mock.Foo();
			}, "");
			#endif
			}

			// 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_IF_SUPPORTED({
			mock.IntFunc(true);
			}, "");
			}

			// 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 SetArgPointee<N>(v) sets the variable pointed to by
			// the N-th (0-based) argument to v.
			TEST(SetArgPointeeTest, SetsTheNthPointee) {
			typedef void MyFunction(bool, int, char);
			Action<MyFunction> a = SetArgPointee<1>(2);

			int n = 0;
			char ch = '\0';
			a.Perform(std::make_tuple(true, &n, &ch));
			EXPECT_EQ(2, n);
			EXPECT_EQ('\0', ch);

			a = SetArgPointee<2>('a');
			n = 0;
			ch = '\0';
			a.Perform(std::make_tuple(true, &n, &ch));
			EXPECT_EQ(0, n);
			EXPECT_EQ('a', ch);
			}

			// Tests that SetArgPointee<N>() accepts a string literal.
			TEST(SetArgPointeeTest, AcceptsStringLiteral) {
			typedef void MyFunction(std::string, const char*);
			Action<MyFunction> a = SetArgPointee<0>("hi");
			std::string str;
			const char* ptr = nullptr;
			a.Perform(std::make_tuple(&str, &ptr));
			EXPECT_EQ("hi", str);
			EXPECT_TRUE(ptr == nullptr);

			a = SetArgPointee<1>("world");
			str = "";
			a.Perform(std::make_tuple(&str, &ptr));
			EXPECT_EQ("", str);
			EXPECT_STREQ("world", ptr);
			}

			TEST(SetArgPointeeTest, AcceptsWideStringLiteral) {
			typedef void MyFunction(const wchar_t**);
			Action<MyFunction> a = SetArgPointee<0>(L"world");
			const wchar_t* ptr = nullptr;
			a.Perform(std::make_tuple(&ptr));
			EXPECT_STREQ(L"world", ptr);

			# if GTEST_HAS_STD_WSTRING

			typedef void MyStringFunction(std::wstring*);
			Action<MyStringFunction> a2 = SetArgPointee<0>(L"world");
			std::wstring str = L"";
			a2.Perform(std::make_tuple(&str));
			EXPECT_EQ(L"world", str);

			# endif
			}

			// Tests that SetArgPointee<N>() accepts a char pointer.
			TEST(SetArgPointeeTest, AcceptsCharPointer) {
			typedef void MyFunction(bool, std::string, const char*);
			const char* const hi = "hi";
			Action<MyFunction> a = SetArgPointee<1>(hi);
			std::string str;
			const char* ptr = nullptr;
			a.Perform(std::make_tuple(true, &str, &ptr));
			EXPECT_EQ("hi", str);
			EXPECT_TRUE(ptr == nullptr);

			char world_array[] = "world";
			char* const world = world_array;
			a = SetArgPointee<2>(world);
			str = "";
			a.Perform(std::make_tuple(true, &str, &ptr));
			EXPECT_EQ("", str);
			EXPECT_EQ(world, ptr);
			}

			TEST(SetArgPointeeTest, AcceptsWideCharPointer) {
			typedef void MyFunction(bool, const wchar_t**);
			const wchar_t* const hi = L"hi";
			Action<MyFunction> a = SetArgPointee<1>(hi);
			const wchar_t* ptr = nullptr;
			a.Perform(std::make_tuple(true, &ptr));
			EXPECT_EQ(hi, ptr);

			# if GTEST_HAS_STD_WSTRING

			typedef void MyStringFunction(bool, std::wstring*);
			wchar_t world_array[] = L"world";
			wchar_t* const world = world_array;
			Action<MyStringFunction> a2 = SetArgPointee<1>(world);
			std::wstring str;
			a2.Perform(std::make_tuple(true, &str));
			EXPECT_EQ(world_array, str);
			# endif
			}

			// 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(std::make_tuple(true, &n, &ch));
			EXPECT_EQ(2, n);
			EXPECT_EQ('\0', ch);

			a = SetArgumentPointee<2>('a');
			n = 0;
			ch = '\0';
			a.Perform(std::make_tuple(true, &n, &ch));
			EXPECT_EQ(0, n);
			EXPECT_EQ('a', ch);
			}

			// 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; }
			};

			short Short(short n) { return n; } // NOLINT
			char Char(char ch) { return ch; }

			const char* CharPtr(const char* s) { return s; }

			bool Unary(int x) { return x < 0; }

			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

			int SumOf4(int a, int b, int c, int d) { return a + b + c + d; }

			class Foo {
			public:
			Foo() : value_(123) {}

			int Nullary() const { return value_; }

			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(std::make_tuple(2)));

			// As an action that takes two arguments.
			Action<int(int, double)> a2 = InvokeWithoutArgs(Nullary); // NOLINT
			EXPECT_EQ(1, a2.Perform(std::make_tuple(2, 3.5)));

			// As an action that returns void.
			Action<void(int)> a3 = InvokeWithoutArgs(VoidNullary); // NOLINT
			g_done = false;
			a3.Perform(std::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(std::make_tuple()));

			// As an action that takes three arguments.
			Action<int(int, double, char)> a2 = // NOLINT
			InvokeWithoutArgs(NullaryFunctor());
			EXPECT_EQ(2, a2.Perform(std::make_tuple(3, 3.5, 'a')));

			// As an action that returns void.
			Action<void()> a3 = InvokeWithoutArgs(VoidNullaryFunctor());
			g_done = false;
			a3.Perform(std::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(std::make_tuple(true, 'a')));
			}

			// Tests using IgnoreResult() on a polymorphic action.
			TEST(IgnoreResultTest, PolymorphicAction) {
			Action<void(int)> a = IgnoreResult(Return(5)); // NOLINT
			a.Perform(std::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(std::make_tuple());
			EXPECT_TRUE(g_done);
			}

			// Tests using IgnoreResult() on an action that returns a class type.

			MyNonDefaultConstructible ReturnMyNonDefaultConstructible(double /* x */) {
			g_done = true;
			return MyNonDefaultConstructible(42);
			}

			TEST(IgnoreResultTest, ActionReturningClass) {
			g_done = false;
			Action<void(int)> a =
			IgnoreResult(Invoke(ReturnMyNonDefaultConstructible)); // NOLINT
			a.Perform(std::make_tuple(2));
			EXPECT_TRUE(g_done);
			}

			TEST(AssignTest, Int) {
			int x = 0;
			Action<void(int)> a = Assign(&x, 5);
			a.Perform(std::make_tuple(0));
			EXPECT_EQ(5, x);
			}

			TEST(AssignTest, String) {
			::std::string x;
			Action<void(void)> a = Assign(&x, "Hello, world");
			a.Perform(std::make_tuple());
			EXPECT_EQ("Hello, world", x);
			}

			TEST(AssignTest, CompatibleTypes) {
			double x = 0;
			Action<void(int)> a = Assign(&x, 5);
			a.Perform(std::make_tuple(0));
			EXPECT_DOUBLE_EQ(5, x);
			}


			// Tests using WithArgs and with an action that takes 1 argument.
			TEST(WithArgsTest, OneArg) {
			Action<bool(double x, int n)> a = WithArgs<1>(Invoke(Unary)); // NOLINT
			EXPECT_TRUE(a.Perform(std::make_tuple(1.5, -1)));
			EXPECT_FALSE(a.Perform(std::make_tuple(1.5, 1)));
			}

			// Tests using WithArgs with an action that takes 2 arguments.
			TEST(WithArgsTest, TwoArgs) {
			Action<const char(const char s, double x, short n)> a = // NOLINT
			WithArgs<0, 2>(Invoke(Binary));
			const char s[] = "Hello";
			EXPECT_EQ(s + 2, a.Perform(std::make_tuple(CharPtr(s), 0.5, Short(2))));
			}

			struct ConcatAll {
			std::string operator()() const { return {}; }
			template <typename... I>
			std::string operator()(const char* a, I... i) const {
			return a + ConcatAll()(i...);
			}
			};

			// Tests using WithArgs with an action that takes 10 arguments.
			TEST(WithArgsTest, TenArgs) {
			Action<std::string(const char, const char, const char, const char)> a =
			WithArgs<0, 1, 2, 3, 2, 1, 0, 1, 2, 3>(Invoke(ConcatAll{}));
			EXPECT_EQ("0123210123",
			a.Perform(std::make_tuple(CharPtr("0"), CharPtr("1"), CharPtr("2"),
			CharPtr("3"))));
			}

			// Tests using WithArgs with an action that is not Invoke().
			class SubtractAction : public ActionInterface<int(int, int)> {
			public:
			int Perform(const std::tuple<int, int>& args) override {
			return std::get<0>(args) - std::get<1>(args);
			}
			};

			TEST(WithArgsTest, NonInvokeAction) {
			Action<int(const std::string&, int, int)> a =
			WithArgs<2, 1>(MakeAction(new SubtractAction));
			std::tuple<std::string, int, int> dummy =
			std::make_tuple(std::string("hi"), 2, 10);
			EXPECT_EQ(8, a.Perform(dummy));
			}

			// Tests using WithArgs to pass all original arguments in the original order.
			TEST(WithArgsTest, Identity) {
			Action<int(int x, char y, short z)> a = // NOLINT
			WithArgs<0, 1, 2>(Invoke(Ternary));
			EXPECT_EQ(123, a.Perform(std::make_tuple(100, Char(20), Short(3))));
			}

			// Tests using WithArgs with repeated arguments.
			TEST(WithArgsTest, RepeatedArguments) {
			Action<int(bool, int m, int n)> a = // NOLINT
			WithArgs<1, 1, 1, 1>(Invoke(SumOf4));
			EXPECT_EQ(4, a.Perform(std::make_tuple(false, 1, 10)));
			}

			// Tests using WithArgs with reversed argument order.
			TEST(WithArgsTest, ReversedArgumentOrder) {
			Action<const char(short n, const char input)> a = // NOLINT
			WithArgs<1, 0>(Invoke(Binary));
			const char s[] = "Hello";
			EXPECT_EQ(s + 2, a.Perform(std::make_tuple(Short(2), CharPtr(s))));
			}

			// Tests using WithArgs with compatible, but not identical, argument types.
			TEST(WithArgsTest, ArgsOfCompatibleTypes) {
			Action<long(short x, char y, double z, char c)> a = // NOLINT
			WithArgs<0, 1, 3>(Invoke(Ternary));
			EXPECT_EQ(123,
			a.Perform(std::make_tuple(Short(100), Char(20), 5.6, Char(3))));
			}

			// Tests using WithArgs with an action that returns void.
			TEST(WithArgsTest, VoidAction) {
			Action<void(double x, char c, int n)> a = WithArgs<2, 1>(Invoke(VoidBinary));
			g_done = false;
			a.Perform(std::make_tuple(1.5, 'a', 3));
			EXPECT_TRUE(g_done);
			}

			TEST(WithArgsTest, ReturnReference) {
			Action<int&(int&, void*)> aa = WithArgs<0>([](int& a) -> int& { return a; });
			int i = 0;
			const int& res = aa.Perform(std::forward_as_tuple(i, nullptr));
			EXPECT_EQ(&i, &res);
			}

			TEST(WithArgsTest, InnerActionWithConversion) {
			Action<Derived*()> inner = [] { return nullptr; };
			Action<Base*(double)> a = testing::WithoutArgs(inner);
			EXPECT_EQ(nullptr, a.Perform(std::make_tuple(1.1)));
			}

			#if !GTEST_OS_WINDOWS_MOBILE

			class SetErrnoAndReturnTest : public testing::Test {
			protected:
			void SetUp() override { errno = 0; }
			void TearDown() override { errno = 0; }
			};

			TEST_F(SetErrnoAndReturnTest, Int) {
			Action<int(void)> a = SetErrnoAndReturn(ENOTTY, -5);
			EXPECT_EQ(-5, a.Perform(std::make_tuple()));
			EXPECT_EQ(ENOTTY, errno);
			}

			TEST_F(SetErrnoAndReturnTest, Ptr) {
			int x;
			Action<int*(void)> a = SetErrnoAndReturn(ENOTTY, &x);
			EXPECT_EQ(&x, a.Perform(std::make_tuple()));
			EXPECT_EQ(ENOTTY, errno);
			}

			TEST_F(SetErrnoAndReturnTest, CompatibleTypes) {
			Action<double()> a = SetErrnoAndReturn(EINVAL, 5);
			EXPECT_DOUBLE_EQ(5.0, a.Perform(std::make_tuple()));
			EXPECT_EQ(EINVAL, errno);
			}

			#endif // !GTEST_OS_WINDOWS_MOBILE

			// Tests ByRef().

			// Tests that the result of ByRef() is copyable.
			TEST(ByRefTest, IsCopyable) {
			const std::string s1 = "Hi";
			const std::string s2 = "Hello";

			auto ref_wrapper = ByRef(s1);
			const std::string& r1 = ref_wrapper;
			EXPECT_EQ(&s1, &r1);

			// Assigns a new value to ref_wrapper.
			ref_wrapper = ByRef(s2);
			const std::string& r2 = ref_wrapper;
			EXPECT_EQ(&s2, &r2);

			auto ref_wrapper1 = ByRef(s1);
			// Copies ref_wrapper1 to ref_wrapper.
			ref_wrapper = ref_wrapper1;
			const std::string& r3 = ref_wrapper;
			EXPECT_EQ(&s1, &r3);
			}

			// Tests using ByRef() on a const value.
			TEST(ByRefTest, ConstValue) {
			const int n = 0;
			// int& ref = ByRef(n); // This shouldn't compile - we have a
			// negative compilation test to catch it.
			const int& const_ref = ByRef(n);
			EXPECT_EQ(&n, &const_ref);
			}

			// Tests using ByRef() on a non-const value.
			TEST(ByRefTest, NonConstValue) {
			int n = 0;

			// ByRef(n) can be used as either an int&,
			int& ref = ByRef(n);
			EXPECT_EQ(&n, &ref);

			// or a const int&.
			const int& const_ref = ByRef(n);
			EXPECT_EQ(&n, &const_ref);
			}

			// Tests explicitly specifying the type when using ByRef().
			TEST(ByRefTest, ExplicitType) {
			int n = 0;
			const int& r1 = ByRef<const int>(n);
			EXPECT_EQ(&n, &r1);

			// ByRef<char>(n); // This shouldn't compile - we have a negative
			// compilation test to catch it.

			Derived d;
			Derived& r2 = ByRef<Derived>(d);
			EXPECT_EQ(&d, &r2);

			const Derived& r3 = ByRef<const Derived>(d);
			EXPECT_EQ(&d, &r3);

			Base& r4 = ByRef<Base>(d);
			EXPECT_EQ(&d, &r4);

			const Base& r5 = ByRef<const Base>(d);
			EXPECT_EQ(&d, &r5);

			// The following shouldn't compile - we have a negative compilation
			// test for it.
			//
			// Base b;
			// ByRef<Derived>(b);
			}

			// Tests that Google Mock prints expression ByRef(x) as a reference to x.
			TEST(ByRefTest, PrintsCorrectly) {
			int n = 42;
			::std::stringstream expected, actual;
			testing::internal::UniversalPrinter<const int&>::Print(n, &expected);
			testing::internal::UniversalPrint(ByRef(n), &actual);
			EXPECT_EQ(expected.str(), actual.str());
			}


			std::unique_ptr<int> UniquePtrSource() {
			return std::unique_ptr<int>(new int(19));
			}

			std::vector<std::unique_ptr<int>> VectorUniquePtrSource() {
			std::vector<std::unique_ptr<int>> out;
			out.emplace_back(new int(7));
			return out;
			}

			TEST(MockMethodTest, CanReturnMoveOnlyValue_Return) {
			MockClass mock;
			std::unique_ptr<int> i(new int(19));
			EXPECT_CALL(mock, MakeUnique()).WillOnce(Return(ByMove(std::move(i))));
			EXPECT_CALL(mock, MakeVectorUnique())
			.WillOnce(Return(ByMove(VectorUniquePtrSource())));
			Derived* d = new Derived;
			EXPECT_CALL(mock, MakeUniqueBase())
			.WillOnce(Return(ByMove(std::unique_ptr<Derived>(d))));

			std::unique_ptr<int> result1 = mock.MakeUnique();
			EXPECT_EQ(19, *result1);

			std::vector<std::unique_ptr<int>> vresult = mock.MakeVectorUnique();
			EXPECT_EQ(1u, vresult.size());
			EXPECT_NE(nullptr, vresult[0]);
			EXPECT_EQ(7, *vresult[0]);

			std::unique_ptr<Base> result2 = mock.MakeUniqueBase();
			EXPECT_EQ(d, result2.get());
			}

			TEST(MockMethodTest, CanReturnMoveOnlyValue_DoAllReturn) {
			testing::MockFunction<void()> mock_function;
			MockClass mock;
			std::unique_ptr<int> i(new int(19));
			EXPECT_CALL(mock_function, Call());
			EXPECT_CALL(mock, MakeUnique()).WillOnce(DoAll(
			InvokeWithoutArgs(&mock_function, &testing::MockFunction<void()>::Call),
			Return(ByMove(std::move(i)))));

			std::unique_ptr<int> result1 = mock.MakeUnique();
			EXPECT_EQ(19, *result1);
			}

			TEST(MockMethodTest, CanReturnMoveOnlyValue_Invoke) {
			MockClass mock;

			// Check default value
			DefaultValue<std::unique_ptr<int>>::SetFactory([] {
			return std::unique_ptr<int>(new int(42));
			});
			EXPECT_EQ(42, *mock.MakeUnique());

			EXPECT_CALL(mock, MakeUnique()).WillRepeatedly(Invoke(UniquePtrSource));
			EXPECT_CALL(mock, MakeVectorUnique())
			.WillRepeatedly(Invoke(VectorUniquePtrSource));
			std::unique_ptr<int> result1 = mock.MakeUnique();
			EXPECT_EQ(19, *result1);
			std::unique_ptr<int> result2 = mock.MakeUnique();
			EXPECT_EQ(19, *result2);
			EXPECT_NE(result1, result2);

			std::vector<std::unique_ptr<int>> vresult = mock.MakeVectorUnique();
			EXPECT_EQ(1u, vresult.size());
			EXPECT_NE(nullptr, vresult[0]);
			EXPECT_EQ(7, *vresult[0]);
			}

			TEST(MockMethodTest, CanTakeMoveOnlyValue) {
			MockClass mock;
			auto make = [](int i) { return std::unique_ptr<int>(new int(i)); };

			EXPECT_CALL(mock, TakeUnique(_)).WillRepeatedly([](std::unique_ptr<int> i) {
			return *i;
			});
			// DoAll() does not compile, since it would move from its arguments twice.
			// EXPECT_CALL(mock, TakeUnique(_, _))
			// .WillRepeatedly(DoAll(Invoke([](std::unique_ptr<int> j) {}),
			// Return(1)));
			EXPECT_CALL(mock, TakeUnique(testing::Pointee(7)))
			.WillOnce(Return(-7))
			.RetiresOnSaturation();
			EXPECT_CALL(mock, TakeUnique(testing::IsNull()))
			.WillOnce(Return(-1))
			.RetiresOnSaturation();

			EXPECT_EQ(5, mock.TakeUnique(make(5)));
			EXPECT_EQ(-7, mock.TakeUnique(make(7)));
			EXPECT_EQ(7, mock.TakeUnique(make(7)));
			EXPECT_EQ(7, mock.TakeUnique(make(7)));
			EXPECT_EQ(-1, mock.TakeUnique({}));

			// Some arguments are moved, some passed by reference.
			auto lvalue = make(6);
			EXPECT_CALL(mock, TakeUnique(_, _))
			.WillOnce([](const std::unique_ptr<int>& i, std::unique_ptr<int> j) {
			return i *j;
			});
			EXPECT_EQ(42, mock.TakeUnique(lvalue, make(7)));

			// The unique_ptr can be saved by the action.
			std::unique_ptr<int> saved;
			EXPECT_CALL(mock, TakeUnique(_)).WillOnce([&saved](std::unique_ptr<int> i) {
			saved = std::move(i);
			return 0;
			});
			EXPECT_EQ(0, mock.TakeUnique(make(42)));
			EXPECT_EQ(42, *saved);
			}


			// Tests for std::function based action.

			int Add(int val, int& ref, int* ptr) { // NOLINT
			int result = val + ref + *ptr;
			ref = 42;
			*ptr = 43;
			return result;
			}

			int Deref(std::unique_ptr<int> ptr) { return *ptr; }

			struct Double {
			template <typename T>
			T operator()(T t) { return 2 * t; }
			};

			std::unique_ptr<int> UniqueInt(int i) {
			return std::unique_ptr<int>(new int(i));
			}

			TEST(FunctorActionTest, ActionFromFunction) {
			Action<int(int, int&, int*)> a = &Add;
			int x = 1, y = 2, z = 3;
			EXPECT_EQ(6, a.Perform(std::forward_as_tuple(x, y, &z)));
			EXPECT_EQ(42, y);
			EXPECT_EQ(43, z);

			Action<int(std::unique_ptr<int>)> a1 = &Deref;
			EXPECT_EQ(7, a1.Perform(std::make_tuple(UniqueInt(7))));
			}

			TEST(FunctorActionTest, ActionFromLambda) {
			Action<int(bool, int)> a1 = [](bool b, int i) { return b ? i : 0; };
			EXPECT_EQ(5, a1.Perform(std::make_tuple(true, 5)));
			EXPECT_EQ(0, a1.Perform(std::make_tuple(false, 5)));

			std::unique_ptr<int> saved;
			Action<void(std::unique_ptr<int>)> a2 = [&saved](std::unique_ptr<int> p) {
			saved = std::move(p);
			};
			a2.Perform(std::make_tuple(UniqueInt(5)));
			EXPECT_EQ(5, *saved);
			}

			TEST(FunctorActionTest, PolymorphicFunctor) {
			Action<int(int)> ai = Double();
			EXPECT_EQ(2, ai.Perform(std::make_tuple(1)));
			Action<double(double)> ad = Double(); // Double? Double double!
			EXPECT_EQ(3.0, ad.Perform(std::make_tuple(1.5)));
			}

			TEST(FunctorActionTest, TypeConversion) {
			// Numeric promotions are allowed.
			const Action<bool(int)> a1 = [](int i) { return i > 1; };
			const Action<int(bool)> a2 = Action<int(bool)>(a1);
			EXPECT_EQ(1, a1.Perform(std::make_tuple(42)));
			EXPECT_EQ(0, a2.Perform(std::make_tuple(42)));

			// Implicit constructors are allowed.
			const Action<bool(std::string)> s1 = [](std::string s) { return !s.empty(); };
			const Action<int(const char)> s2 = Action<int(const char)>(s1);
			EXPECT_EQ(0, s2.Perform(std::make_tuple("")));
			EXPECT_EQ(1, s2.Perform(std::make_tuple("hello")));

			// Also between the lambda and the action itself.
			const Action<bool(std::string)> x = [](Unused) { return 42; };
			EXPECT_TRUE(x.Perform(std::make_tuple("hello")));
			}

			TEST(FunctorActionTest, UnusedArguments) {
			// Verify that users can ignore uninteresting arguments.
			Action<int(int, double y, double z)> a =
			[](int i, Unused, Unused) { return 2 * i; };
			std::tuple<int, double, double> dummy = std::make_tuple(3, 7.3, 9.44);
			EXPECT_EQ(6, a.Perform(dummy));
			}

			// Test that basic built-in actions work with move-only arguments.
			TEST(MoveOnlyArgumentsTest, ReturningActions) {
			Action<int(std::unique_ptr<int>)> a = Return(1);
			EXPECT_EQ(1, a.Perform(std::make_tuple(nullptr)));

			a = testing::WithoutArgs([]() { return 7; });
			EXPECT_EQ(7, a.Perform(std::make_tuple(nullptr)));

			Action<void(std::unique_ptr<int>, int*)> a2 = testing::SetArgPointee<1>(3);
			int x = 0;
			a2.Perform(std::make_tuple(nullptr, &x));
			EXPECT_EQ(x, 3);
			}


			} // Unnamed namespace

			#ifdef _MSC_VER
			#if _MSC_VER == 1900
			# pragma warning(pop)
			#endif
			#endif

R9484/googlemock/test/gmock-actions_test.ccd072682119f8master

gmock-actions_test.ccView Options

R9484/googlemock/test/gmock-actions_test.cc
d072682119f8master

gmock-actions_test.cc
View Options