// 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 function mocker classes.

#include "gmock/gmock-generated-function-mockers.h"

#if GTEST_OS_WINDOWS
// MSDN says the header file to be included for STDMETHOD is BaseTyps.h but
// we are getting compiler errors if we use basetyps.h, hence including
// objbase.h for definition of STDMETHOD.
# include <objbase.h>
#endif  // GTEST_OS_WINDOWS

#include <map>
#include <string>
#include "gmock/gmock.h"
#include "gtest/gtest.h"

// There is a bug in MSVC (fixed in VS 2008) that prevents creating a
// mock for a function with const arguments, so we don't test such
// cases for MSVC versions older than 2008.
#if !GTEST_OS_WINDOWS || (_MSC_VER >= 1500)
# define GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
#endif  // !GTEST_OS_WINDOWS || (_MSC_VER >= 1500)

namespace testing {
namespace gmock_generated_function_mockers_test {

using testing::internal::string;
using testing::_;
using testing::A;
using testing::An;
using testing::AnyNumber;
using testing::Const;
using testing::DoDefault;
using testing::Eq;
using testing::Lt;
using testing::MockFunction;
using testing::Ref;
using testing::Return;
using testing::ReturnRef;
using testing::TypedEq;

class FooInterface {
 public:
  virtual ~FooInterface() {}

  virtual void VoidReturning(int x) = 0;

  virtual int Nullary() = 0;
  virtual bool Unary(int x) = 0;
  virtual long Binary(short x, int y) = 0;  // NOLINT
  virtual int Decimal(bool b, char c, short d, int e, long f,  // NOLINT
                      float g, double h, unsigned i, char* j, const string& k)
      = 0;

  virtual bool TakesNonConstReference(int& n) = 0;  // NOLINT
  virtual string TakesConstReference(const int& n) = 0;
#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
  virtual bool TakesConst(const int x) = 0;
#endif  // GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS

  virtual int OverloadedOnArgumentNumber() = 0;
  virtual int OverloadedOnArgumentNumber(int n) = 0;

  virtual int OverloadedOnArgumentType(int n) = 0;
  virtual char OverloadedOnArgumentType(char c) = 0;

  virtual int OverloadedOnConstness() = 0;
  virtual char OverloadedOnConstness() const = 0;

  virtual int TypeWithHole(int (*func)()) = 0;
  virtual int TypeWithComma(const std::map<int, string>& a_map) = 0;

#if GTEST_OS_WINDOWS
  STDMETHOD_(int, CTNullary)() = 0;
  STDMETHOD_(bool, CTUnary)(int x) = 0;
  STDMETHOD_(int, CTDecimal)(bool b, char c, short d, int e, long f,  // NOLINT
      float g, double h, unsigned i, char* j, const string& k) = 0;
  STDMETHOD_(char, CTConst)(int x) const = 0;
#endif  // GTEST_OS_WINDOWS
};

// Const qualifiers on arguments were once (incorrectly) considered
// significant in determining whether two virtual functions had the same
// signature. This was fixed in Visual Studio 2008. However, the compiler
// still emits a warning that alerts about this change in behavior.
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable : 4373)
#endif
class MockFoo : public FooInterface {
 public:
  MockFoo() {}

  // Makes sure that a mock function parameter can be named.
  MOCK_METHOD1(VoidReturning, void(int n));  // NOLINT

  MOCK_METHOD0(Nullary, int());  // NOLINT

  // Makes sure that a mock function parameter can be unnamed.
  MOCK_METHOD1(Unary, bool(int));  // NOLINT
  MOCK_METHOD2(Binary, long(short, int));  // NOLINT
  MOCK_METHOD10(Decimal, int(bool, char, short, int, long, float,  // NOLINT
                             double, unsigned, char*, const string& str));

  MOCK_METHOD1(TakesNonConstReference, bool(int&));  // NOLINT
  MOCK_METHOD1(TakesConstReference, string(const int&));

#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
  MOCK_METHOD1(TakesConst, bool(const int));  // NOLINT
#endif

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0(ReturnTypeWithComma, std::map<int, string>());
  MOCK_CONST_METHOD1(ReturnTypeWithComma,
                     std::map<int, string>(int));  // NOLINT

  MOCK_METHOD0(OverloadedOnArgumentNumber, int());  // NOLINT
  MOCK_METHOD1(OverloadedOnArgumentNumber, int(int));  // NOLINT

  MOCK_METHOD1(OverloadedOnArgumentType, int(int));  // NOLINT
  MOCK_METHOD1(OverloadedOnArgumentType, char(char));  // NOLINT

  MOCK_METHOD0(OverloadedOnConstness, int());  // NOLINT
  MOCK_CONST_METHOD0(OverloadedOnConstness, char());  // NOLINT

  MOCK_METHOD1(TypeWithHole, int(int (*)()));  // NOLINT
  MOCK_METHOD1(TypeWithComma, int(const std::map<int, string>&));  // NOLINT

#if GTEST_OS_WINDOWS
  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTNullary, int());
  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTUnary, bool(int));
  MOCK_METHOD10_WITH_CALLTYPE(STDMETHODCALLTYPE, CTDecimal, int(bool b, char c,
      short d, int e, long f, float g, double h, unsigned i, char* j,
      const string& k));
  MOCK_CONST_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTConst, char(int));

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTReturnTypeWithComma,
                             std::map<int, string>());
#endif  // GTEST_OS_WINDOWS

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
};
#ifdef _MSC_VER
# pragma warning(pop)
#endif

class FunctionMockerTest : public testing::Test {
 protected:
  FunctionMockerTest() : foo_(&mock_foo_) {}

  FooInterface* const foo_;
  MockFoo mock_foo_;
};

// Tests mocking a void-returning function.
TEST_F(FunctionMockerTest, MocksVoidFunction) {
  EXPECT_CALL(mock_foo_, VoidReturning(Lt(100)));
  foo_->VoidReturning(0);
}

// Tests mocking a nullary function.
TEST_F(FunctionMockerTest, MocksNullaryFunction) {
  EXPECT_CALL(mock_foo_, Nullary())
      .WillOnce(DoDefault())
      .WillOnce(Return(1));

  EXPECT_EQ(0, foo_->Nullary());
  EXPECT_EQ(1, foo_->Nullary());
}

// Tests mocking a unary function.
TEST_F(FunctionMockerTest, MocksUnaryFunction) {
  EXPECT_CALL(mock_foo_, Unary(Eq(2)))
      .Times(2)
      .WillOnce(Return(true));

  EXPECT_TRUE(foo_->Unary(2));
  EXPECT_FALSE(foo_->Unary(2));
}

// Tests mocking a binary function.
TEST_F(FunctionMockerTest, MocksBinaryFunction) {
  EXPECT_CALL(mock_foo_, Binary(2, _))
      .WillOnce(Return(3));

  EXPECT_EQ(3, foo_->Binary(2, 1));
}

// Tests mocking a decimal function.
TEST_F(FunctionMockerTest, MocksDecimalFunction) {
  EXPECT_CALL(mock_foo_, Decimal(true, 'a', 0, 0, 1L, A<float>(),
                                 Lt(100), 5U, NULL, "hi"))
      .WillOnce(Return(5));

  EXPECT_EQ(5, foo_->Decimal(true, 'a', 0, 0, 1, 0, 0, 5, NULL, "hi"));
}

// Tests mocking a function that takes a non-const reference.
TEST_F(FunctionMockerTest, MocksFunctionWithNonConstReferenceArgument) {
  int a = 0;
  EXPECT_CALL(mock_foo_, TakesNonConstReference(Ref(a)))
      .WillOnce(Return(true));

  EXPECT_TRUE(foo_->TakesNonConstReference(a));
}

// Tests mocking a function that takes a const reference.
TEST_F(FunctionMockerTest, MocksFunctionWithConstReferenceArgument) {
  int a = 0;
  EXPECT_CALL(mock_foo_, TakesConstReference(Ref(a)))
      .WillOnce(Return("Hello"));

  EXPECT_EQ("Hello", foo_->TakesConstReference(a));
}

#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
// Tests mocking a function that takes a const variable.
TEST_F(FunctionMockerTest, MocksFunctionWithConstArgument) {
  EXPECT_CALL(mock_foo_, TakesConst(Lt(10)))
      .WillOnce(DoDefault());

  EXPECT_FALSE(foo_->TakesConst(5));
}
#endif  // GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS

// Tests mocking functions overloaded on the number of arguments.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentNumber) {
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentNumber())
      .WillOnce(Return(1));
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentNumber(_))
      .WillOnce(Return(2));

  EXPECT_EQ(2, foo_->OverloadedOnArgumentNumber(1));
  EXPECT_EQ(1, foo_->OverloadedOnArgumentNumber());
}

// Tests mocking functions overloaded on the types of argument.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentType) {
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentType(An<int>()))
      .WillOnce(Return(1));
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentType(TypedEq<char>('a')))
      .WillOnce(Return('b'));

  EXPECT_EQ(1, foo_->OverloadedOnArgumentType(0));
  EXPECT_EQ('b', foo_->OverloadedOnArgumentType('a'));
}

// Tests mocking functions overloaded on the const-ness of this object.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnConstnessOfThis) {
  EXPECT_CALL(mock_foo_, OverloadedOnConstness());
  EXPECT_CALL(Const(mock_foo_), OverloadedOnConstness())
      .WillOnce(Return('a'));

  EXPECT_EQ(0, foo_->OverloadedOnConstness());
  EXPECT_EQ('a', Const(*foo_).OverloadedOnConstness());
}

TEST_F(FunctionMockerTest, MocksReturnTypeWithComma) {
  const std::map<int, string> a_map;
  EXPECT_CALL(mock_foo_, ReturnTypeWithComma())
      .WillOnce(Return(a_map));
  EXPECT_CALL(mock_foo_, ReturnTypeWithComma(42))
      .WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock_foo_.ReturnTypeWithComma());
  EXPECT_EQ(a_map, mock_foo_.ReturnTypeWithComma(42));
}

#if GTEST_OS_WINDOWS
// Tests mocking a nullary function with calltype.
TEST_F(FunctionMockerTest, MocksNullaryFunctionWithCallType) {
  EXPECT_CALL(mock_foo_, CTNullary())
      .WillOnce(Return(-1))
      .WillOnce(Return(0));

  EXPECT_EQ(-1, foo_->CTNullary());
  EXPECT_EQ(0, foo_->CTNullary());
}

// Tests mocking a unary function with calltype.
TEST_F(FunctionMockerTest, MocksUnaryFunctionWithCallType) {
  EXPECT_CALL(mock_foo_, CTUnary(Eq(2)))
      .Times(2)
      .WillOnce(Return(true))
      .WillOnce(Return(false));

  EXPECT_TRUE(foo_->CTUnary(2));
  EXPECT_FALSE(foo_->CTUnary(2));
}

// Tests mocking a decimal function with calltype.
TEST_F(FunctionMockerTest, MocksDecimalFunctionWithCallType) {
  EXPECT_CALL(mock_foo_, CTDecimal(true, 'a', 0, 0, 1L, A<float>(),
                                   Lt(100), 5U, NULL, "hi"))
      .WillOnce(Return(10));

  EXPECT_EQ(10, foo_->CTDecimal(true, 'a', 0, 0, 1, 0, 0, 5, NULL, "hi"));
}

// Tests mocking functions overloaded on the const-ness of this object.
TEST_F(FunctionMockerTest, MocksFunctionsConstFunctionWithCallType) {
  EXPECT_CALL(Const(mock_foo_), CTConst(_))
      .WillOnce(Return('a'));

  EXPECT_EQ('a', Const(*foo_).CTConst(0));
}

TEST_F(FunctionMockerTest, MocksReturnTypeWithCommaAndCallType) {
  const std::map<int, string> a_map;
  EXPECT_CALL(mock_foo_, CTReturnTypeWithComma())
      .WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock_foo_.CTReturnTypeWithComma());
}

#endif  // GTEST_OS_WINDOWS

class MockB {
 public:
  MockB() {}

  MOCK_METHOD0(DoB, void());

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockB);
};

// Tests that functions with no EXPECT_CALL() ruls can be called any
// number of times.
TEST(ExpectCallTest, UnmentionedFunctionCanBeCalledAnyNumberOfTimes) {
  {
    MockB b;
  }

  {
    MockB b;
    b.DoB();
  }

  {
    MockB b;
    b.DoB();
    b.DoB();
  }
}

// Tests mocking template interfaces.

template <typename T>
class StackInterface {
 public:
  virtual ~StackInterface() {}

  // Template parameter appears in function parameter.
  virtual void Push(const T& value) = 0;
  virtual void Pop() = 0;
  virtual int GetSize() const = 0;
  // Template parameter appears in function return type.
  virtual const T& GetTop() const = 0;
};

template <typename T>
class MockStack : public StackInterface<T> {
 public:
  MockStack() {}

  MOCK_METHOD1_T(Push, void(const T& elem));
  MOCK_METHOD0_T(Pop, void());
  MOCK_CONST_METHOD0_T(GetSize, int());  // NOLINT
  MOCK_CONST_METHOD0_T(GetTop, const T&());

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0_T(ReturnTypeWithComma, std::map<int, int>());
  MOCK_CONST_METHOD1_T(ReturnTypeWithComma, std::map<int, int>(int));  // NOLINT

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStack);
};

// Tests that template mock works.
TEST(TemplateMockTest, Works) {
  MockStack<int> mock;

  EXPECT_CALL(mock, GetSize())
      .WillOnce(Return(0))
      .WillOnce(Return(1))
      .WillOnce(Return(0));
  EXPECT_CALL(mock, Push(_));
  int n = 5;
  EXPECT_CALL(mock, GetTop())
      .WillOnce(ReturnRef(n));
  EXPECT_CALL(mock, Pop())
      .Times(AnyNumber());

  EXPECT_EQ(0, mock.GetSize());
  mock.Push(5);
  EXPECT_EQ(1, mock.GetSize());
  EXPECT_EQ(5, mock.GetTop());
  mock.Pop();
  EXPECT_EQ(0, mock.GetSize());
}

TEST(TemplateMockTest, MethodWithCommaInReturnTypeWorks) {
  MockStack<int> mock;

  const std::map<int, int> a_map;
  EXPECT_CALL(mock, ReturnTypeWithComma())
      .WillOnce(Return(a_map));
  EXPECT_CALL(mock, ReturnTypeWithComma(1))
      .WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock.ReturnTypeWithComma());
  EXPECT_EQ(a_map, mock.ReturnTypeWithComma(1));
}

#if GTEST_OS_WINDOWS
// Tests mocking template interfaces with calltype.

template <typename T>
class StackInterfaceWithCallType {
 public:
  virtual ~StackInterfaceWithCallType() {}

  // Template parameter appears in function parameter.
  STDMETHOD_(void, Push)(const T& value) = 0;
  STDMETHOD_(void, Pop)() = 0;
  STDMETHOD_(int, GetSize)() const = 0;
  // Template parameter appears in function return type.
  STDMETHOD_(const T&, GetTop)() const = 0;
};

template <typename T>
class MockStackWithCallType : public StackInterfaceWithCallType<T> {
 public:
  MockStackWithCallType() {}

  MOCK_METHOD1_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Push, void(const T& elem));
  MOCK_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Pop, void());
  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetSize, int());
  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetTop, const T&());

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStackWithCallType);
};

// Tests that template mock with calltype works.
TEST(TemplateMockTestWithCallType, Works) {
  MockStackWithCallType<int> mock;

  EXPECT_CALL(mock, GetSize())
      .WillOnce(Return(0))
      .WillOnce(Return(1))
      .WillOnce(Return(0));
  EXPECT_CALL(mock, Push(_));
  int n = 5;
  EXPECT_CALL(mock, GetTop())
      .WillOnce(ReturnRef(n));
  EXPECT_CALL(mock, Pop())
      .Times(AnyNumber());

  EXPECT_EQ(0, mock.GetSize());
  mock.Push(5);
  EXPECT_EQ(1, mock.GetSize());
  EXPECT_EQ(5, mock.GetTop());
  mock.Pop();
  EXPECT_EQ(0, mock.GetSize());
}
#endif  // GTEST_OS_WINDOWS

#define MY_MOCK_METHODS1_ \
    MOCK_METHOD0(Overloaded, void()); \
    MOCK_CONST_METHOD1(Overloaded, int(int n)); \
    MOCK_METHOD2(Overloaded, bool(bool f, int n))

class MockOverloadedOnArgNumber {
 public:
  MockOverloadedOnArgNumber() {}

  MY_MOCK_METHODS1_;

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnArgNumber);
};

TEST(OverloadedMockMethodTest, CanOverloadOnArgNumberInMacroBody) {
  MockOverloadedOnArgNumber mock;
  EXPECT_CALL(mock, Overloaded());
  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
  EXPECT_CALL(mock, Overloaded(true, 1)).WillOnce(Return(true));

  mock.Overloaded();
  EXPECT_EQ(2, mock.Overloaded(1));
  EXPECT_TRUE(mock.Overloaded(true, 1));
}

#define MY_MOCK_METHODS2_ \
    MOCK_CONST_METHOD1(Overloaded, int(int n)); \
    MOCK_METHOD1(Overloaded, int(int n));

class MockOverloadedOnConstness {
 public:
  MockOverloadedOnConstness() {}

  MY_MOCK_METHODS2_;

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnConstness);
};

TEST(OverloadedMockMethodTest, CanOverloadOnConstnessInMacroBody) {
  MockOverloadedOnConstness mock;
  const MockOverloadedOnConstness* const_mock = &mock;
  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
  EXPECT_CALL(*const_mock, Overloaded(1)).WillOnce(Return(3));

  EXPECT_EQ(2, mock.Overloaded(1));
  EXPECT_EQ(3, const_mock->Overloaded(1));
}

TEST(MockFunctionTest, WorksForVoidNullary) {
  MockFunction<void()> foo;
  EXPECT_CALL(foo, Call());
  foo.Call();
}

TEST(MockFunctionTest, WorksForNonVoidNullary) {
  MockFunction<int()> foo;
  EXPECT_CALL(foo, Call())
      .WillOnce(Return(1))
      .WillOnce(Return(2));
  EXPECT_EQ(1, foo.Call());
  EXPECT_EQ(2, foo.Call());
}

TEST(MockFunctionTest, WorksForVoidUnary) {
  MockFunction<void(int)> foo;
  EXPECT_CALL(foo, Call(1));
  foo.Call(1);
}

TEST(MockFunctionTest, WorksForNonVoidBinary) {
  MockFunction<int(bool, int)> foo;
  EXPECT_CALL(foo, Call(false, 42))
      .WillOnce(Return(1))
      .WillOnce(Return(2));
  EXPECT_CALL(foo, Call(true, Ge(100)))
      .WillOnce(Return(3));
  EXPECT_EQ(1, foo.Call(false, 42));
  EXPECT_EQ(2, foo.Call(false, 42));
  EXPECT_EQ(3, foo.Call(true, 120));
}

TEST(MockFunctionTest, WorksFor10Arguments) {
  MockFunction<int(bool a0, char a1, int a2, int a3, int a4,
                   int a5, int a6, char a7, int a8, bool a9)> foo;
  EXPECT_CALL(foo, Call(_, 'a', _, _, _, _, _, _, _, _))
      .WillOnce(Return(1))
      .WillOnce(Return(2));
  EXPECT_EQ(1, foo.Call(false, 'a', 0, 0, 0, 0, 0, 'b', 0, true));
  EXPECT_EQ(2, foo.Call(true, 'a', 0, 0, 0, 0, 0, 'b', 1, false));
}

#if GTEST_HAS_STD_FUNCTION_
TEST(MockFunctionTest, AsStdFunction) {
  MockFunction<int(int)> foo;
  auto call = [](const std::function<int(int)> &f, int i) {
    return f(i);
  };
  EXPECT_CALL(foo, Call(1)).WillOnce(Return(-1));
  EXPECT_CALL(foo, Call(2)).WillOnce(Return(-2));
  EXPECT_EQ(-1, call(foo.AsStdFunction(), 1));
  EXPECT_EQ(-2, call(foo.AsStdFunction(), 2));
}

TEST(MockFunctionTest, AsStdFunctionReturnsReference) {
  MockFunction<int&()> foo;
  int value = 1;
  EXPECT_CALL(foo, Call()).WillOnce(ReturnRef(value));
  int& ref = foo.AsStdFunction()();
  EXPECT_EQ(1, ref);
  value = 2;
  EXPECT_EQ(2, ref);
}
#endif  // GTEST_HAS_STD_FUNCTION_

}  // namespace gmock_generated_function_mockers_test
}  // namespace testing
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<a id='n530' href='#n530'>530</a>
<a id='n531' href='#n531'>531</a>
<a id='n532' href='#n532'>532</a>
<a id='n533' href='#n533'>533</a>
<a id='n534' href='#n534'>534</a>
<a id='n535' href='#n535'>535</a>
<a id='n536' href='#n536'>536</a>
<a id='n537' href='#n537'>537</a>
<a id='n538' href='#n538'>538</a>
<a id='n539' href='#n539'>539</a>
<a id='n540' href='#n540'>540</a>
<a id='n541' href='#n541'>541</a>
<a id='n542' href='#n542'>542</a>
<a id='n543' href='#n543'>543</a>
<a id='n544' href='#n544'>544</a>
<a id='n545' href='#n545'>545</a>
<a id='n546' href='#n546'>546</a>
<a id='n547' href='#n547'>547</a>
<a id='n548' href='#n548'>548</a>
<a id='n549' href='#n549'>549</a>
<a id='n550' href='#n550'>550</a>
<a id='n551' href='#n551'>551</a>
<a id='n552' href='#n552'>552</a>
<a id='n553' href='#n553'>553</a>
<a id='n554' href='#n554'>554</a>
<a id='n555' href='#n555'>555</a>
<a id='n556' href='#n556'>556</a>
<a id='n557' href='#n557'>557</a>
<a id='n558' href='#n558'>558</a>
<a id='n559' href='#n559'>559</a>
<a id='n560' href='#n560'>560</a>
<a id='n561' href='#n561'>561</a>
<a id='n562' href='#n562'>562</a>
<a id='n563' href='#n563'>563</a>
<a id='n564' href='#n564'>564</a>
<a id='n565' href='#n565'>565</a>
<a id='n566' href='#n566'>566</a>
<a id='n567' href='#n567'>567</a>
<a id='n568' href='#n568'>568</a>
<a id='n569' href='#n569'>569</a>
<a id='n570' href='#n570'>570</a>
<a id='n571' href='#n571'>571</a>
<a id='n572' href='#n572'>572</a>
<a id='n573' href='#n573'>573</a>
<a id='n574' href='#n574'>574</a>
<a id='n575' href='#n575'>575</a>
<a id='n576' href='#n576'>576</a>
<a id='n577' href='#n577'>577</a>
<a id='n578' href='#n578'>578</a>
<a id='n579' href='#n579'>579</a>
<a id='n580' href='#n580'>580</a>
<a id='n581' href='#n581'>581</a>
<a id='n582' href='#n582'>582</a>
<a id='n583' href='#n583'>583</a>
<a id='n584' href='#n584'>584</a>
<a id='n585' href='#n585'>585</a>
<a id='n586' href='#n586'>586</a>
<a id='n587' href='#n587'>587</a>
<a id='n588' href='#n588'>588</a>
<a id='n589' href='#n589'>589</a>
<a id='n590' href='#n590'>590</a>
<a id='n591' href='#n591'>591</a>
<a id='n592' href='#n592'>592</a>
<a id='n593' href='#n593'>593</a>
<a id='n594' href='#n594'>594</a>
<a id='n595' href='#n595'>595</a>
<a id='n596' href='#n596'>596</a>
<a id='n597' href='#n597'>597</a>
<a id='n598' href='#n598'>598</a>
<a id='n599' href='#n599'>599</a>
<a id='n600' href='#n600'>600</a>
<a id='n601' href='#n601'>601</a>
<a id='n602' href='#n602'>602</a>
<a id='n603' href='#n603'>603</a>
<a id='n604' href='#n604'>604</a>
<a id='n605' href='#n605'>605</a>
<a id='n606' href='#n606'>606</a>
<a id='n607' href='#n607'>607</a>
<a id='n608' href='#n608'>608</a>
<a id='n609' href='#n609'>609</a>
<a id='n610' href='#n610'>610</a>
<a id='n611' href='#n611'>611</a>
<a id='n612' href='#n612'>612</a>
<a id='n613' href='#n613'>613</a>
<a id='n614' href='#n614'>614</a>
<a id='n615' href='#n615'>615</a>
<a id='n616' href='#n616'>616</a>
<a id='n617' href='#n617'>617</a>
<a id='n618' href='#n618'>618</a>
<a id='n619' href='#n619'>619</a>
<a id='n620' href='#n620'>620</a>
<a id='n621' href='#n621'>621</a>
<a id='n622' href='#n622'>622</a>
<a id='n623' href='#n623'>623</a>
<a id='n624' href='#n624'>624</a>
<a id='n625' href='#n625'>625</a>
<a id='n626' href='#n626'>626</a>
<a id='n627' href='#n627'>627</a>
<a id='n628' href='#n628'>628</a>
<a id='n629' href='#n629'>629</a>
<a id='n630' href='#n630'>630</a>
<a id='n631' href='#n631'>631</a>
<a id='n632' href='#n632'>632</a>
<a id='n633' href='#n633'>633</a>
<a id='n634' href='#n634'>634</a>
<a id='n635' href='#n635'>635</a>
<a id='n636' href='#n636'>636</a>
<a id='n637' href='#n637'>637</a>
<a id='n638' href='#n638'>638</a>
<a id='n639' href='#n639'>639</a>
<a id='n640' href='#n640'>640</a>
<a id='n641' href='#n641'>641</a>
<a id='n642' href='#n642'>642</a>
<a id='n643' href='#n643'>643</a>
<a id='n644' href='#n644'>644</a>
<a id='n645' href='#n645'>645</a>
<a id='n646' href='#n646'>646</a>
<a id='n647' href='#n647'>647</a>
<a id='n648' href='#n648'>648</a>
<a id='n649' href='#n649'>649</a>
<a id='n650' href='#n650'>650</a>
<a id='n651' href='#n651'>651</a>
<a id='n652' href='#n652'>652</a>
<a id='n653' href='#n653'>653</a>
<a id='n654' href='#n654'>654</a>
<a id='n655' href='#n655'>655</a>
<a id='n656' href='#n656'>656</a>
<a id='n657' href='#n657'>657</a>
<a id='n658' href='#n658'>658</a>
<a id='n659' href='#n659'>659</a>
<a id='n660' href='#n660'>660</a>
<a id='n661' href='#n661'>661</a>
<a id='n662' href='#n662'>662</a>
<a id='n663' href='#n663'>663</a>
<a id='n664' href='#n664'>664</a>
<a id='n665' href='#n665'>665</a>
<a id='n666' href='#n666'>666</a>
<a id='n667' href='#n667'>667</a>
<a id='n668' href='#n668'>668</a>
<a id='n669' href='#n669'>669</a>
<a id='n670' href='#n670'>670</a>
<a id='n671' href='#n671'>671</a>
<a id='n672' href='#n672'>672</a>
<a id='n673' href='#n673'>673</a>
<a id='n674' href='#n674'>674</a>
<a id='n675' href='#n675'>675</a>
<a id='n676' href='#n676'>676</a>
<a id='n677' href='#n677'>677</a>
<a id='n678' href='#n678'>678</a>
<a id='n679' href='#n679'>679</a>
<a id='n680' href='#n680'>680</a>
<a id='n681' href='#n681'>681</a>
<a id='n682' href='#n682'>682</a>
<a id='n683' href='#n683'>683</a>
<a id='n684' href='#n684'>684</a>
<a id='n685' href='#n685'>685</a>
<a id='n686' href='#n686'>686</a>
<a id='n687' href='#n687'>687</a>
<a id='n688' href='#n688'>688</a>
<a id='n689' href='#n689'>689</a>
<a id='n690' href='#n690'>690</a>
<a id='n691' href='#n691'>691</a>
<a id='n692' href='#n692'>692</a>
<a id='n693' href='#n693'>693</a>
<a id='n694' href='#n694'>694</a>
<a id='n695' href='#n695'>695</a>
<a id='n696' href='#n696'>696</a>
<a id='n697' href='#n697'>697</a>
<a id='n698' href='#n698'>698</a>
<a id='n699' href='#n699'>699</a>
</pre></td>
<td class='lines'><pre><code>