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Diffstat (limited to 'external/gtest/googlemock/test/gmock-actions_test.cc')
| -rw-r--r-- | external/gtest/googlemock/test/gmock-actions_test.cc | 2224 |
1 files changed, 2224 insertions, 0 deletions
diff --git a/external/gtest/googlemock/test/gmock-actions_test.cc b/external/gtest/googlemock/test/gmock-actions_test.cc new file mode 100644 index 0000000..7596532 --- /dev/null +++ b/external/gtest/googlemock/test/gmock-actions_test.cc @@ -0,0 +1,2224 @@ +// 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. + +#include "gmock/gmock-actions.h" + +#include <algorithm> +#include <functional> +#include <iterator> +#include <memory> +#include <sstream> +#include <string> +#include <tuple> +#include <type_traits> +#include <utility> +#include <vector> + +#include "gmock/gmock.h" +#include "gmock/internal/gmock-port.h" +#include "gtest/gtest-spi.h" +#include "gtest/gtest.h" +#include "gtest/internal/gtest-port.h" + +// Silence C4100 (unreferenced formal parameter) and C4503 (decorated name +// length exceeded) for MSVC. +GTEST_DISABLE_MSC_WARNINGS_PUSH_(4100 4503) +#if defined(_MSC_VER) && (_MSC_VER == 1900) +// and silence C4800 (C4800: 'int *const ': forcing value +// to bool 'true' or 'false') for MSVC 15 +GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800) +#endif + +namespace testing { +namespace { + +using ::testing::internal::BuiltInDefaultValue; + +TEST(TypeTraits, Negation) { + // Direct use with std types. + static_assert(std::is_base_of<std::false_type, + internal::negation<std::true_type>>::value, + ""); + + static_assert(std::is_base_of<std::true_type, + internal::negation<std::false_type>>::value, + ""); + + // With other types that fit the requirement of a value member that is + // convertible to bool. + static_assert(std::is_base_of< + std::true_type, + internal::negation<std::integral_constant<int, 0>>>::value, + ""); + + static_assert(std::is_base_of< + std::false_type, + internal::negation<std::integral_constant<int, 1>>>::value, + ""); + + static_assert(std::is_base_of< + std::false_type, + internal::negation<std::integral_constant<int, -1>>>::value, + ""); +} + +// Weird false/true types that aren't actually bool constants (but should still +// be legal according to [meta.logical] because `bool(T::value)` is valid), are +// distinct from std::false_type and std::true_type, and are distinct from other +// instantiations of the same template. +// +// These let us check finicky details mandated by the standard like +// "std::conjunction should evaluate to a type that inherits from the first +// false-y input". +template <int> +struct MyFalse : std::integral_constant<int, 0> {}; + +template <int> +struct MyTrue : std::integral_constant<int, -1> {}; + +TEST(TypeTraits, Conjunction) { + // Base case: always true. + static_assert(std::is_base_of<std::true_type, internal::conjunction<>>::value, + ""); + + // One predicate: inherits from that predicate, regardless of value. + static_assert( + std::is_base_of<MyFalse<0>, internal::conjunction<MyFalse<0>>>::value, + ""); + + static_assert( + std::is_base_of<MyTrue<0>, internal::conjunction<MyTrue<0>>>::value, ""); + + // Multiple predicates, with at least one false: inherits from that one. + static_assert( + std::is_base_of<MyFalse<1>, internal::conjunction<MyTrue<0>, MyFalse<1>, + MyTrue<2>>>::value, + ""); + + static_assert( + std::is_base_of<MyFalse<1>, internal::conjunction<MyTrue<0>, MyFalse<1>, + MyFalse<2>>>::value, + ""); + + // Short circuiting: in the case above, additional predicates need not even + // define a value member. + struct Empty {}; + static_assert( + std::is_base_of<MyFalse<1>, internal::conjunction<MyTrue<0>, MyFalse<1>, + Empty>>::value, + ""); + + // All predicates true: inherits from the last. + static_assert( + std::is_base_of<MyTrue<2>, internal::conjunction<MyTrue<0>, MyTrue<1>, + MyTrue<2>>>::value, + ""); +} + +TEST(TypeTraits, Disjunction) { + // Base case: always false. + static_assert( + std::is_base_of<std::false_type, internal::disjunction<>>::value, ""); + + // One predicate: inherits from that predicate, regardless of value. + static_assert( + std::is_base_of<MyFalse<0>, internal::disjunction<MyFalse<0>>>::value, + ""); + + static_assert( + std::is_base_of<MyTrue<0>, internal::disjunction<MyTrue<0>>>::value, ""); + + // Multiple predicates, with at least one true: inherits from that one. + static_assert( + std::is_base_of<MyTrue<1>, internal::disjunction<MyFalse<0>, MyTrue<1>, + MyFalse<2>>>::value, + ""); + + static_assert( + std::is_base_of<MyTrue<1>, internal::disjunction<MyFalse<0>, MyTrue<1>, + MyTrue<2>>>::value, + ""); + + // Short circuiting: in the case above, additional predicates need not even + // define a value member. + struct Empty {}; + static_assert( + std::is_base_of<MyTrue<1>, internal::disjunction<MyFalse<0>, MyTrue<1>, + Empty>>::value, + ""); + + // All predicates false: inherits from the last. + static_assert( + std::is_base_of<MyFalse<2>, internal::disjunction<MyFalse<0>, MyFalse<1>, + MyFalse<2>>>::value, + ""); +} + +TEST(TypeTraits, IsInvocableRV) { + struct C { + int operator()() const { return 0; } + void operator()(int) & {} + std::string operator()(int) && { return ""; } + }; + + // The first overload is callable for const and non-const rvalues and lvalues. + // It can be used to obtain an int, cv void, or anything int is convertible + // to. + static_assert(internal::is_callable_r<int, C>::value, ""); + static_assert(internal::is_callable_r<int, C&>::value, ""); + static_assert(internal::is_callable_r<int, const C>::value, ""); + static_assert(internal::is_callable_r<int, const C&>::value, ""); + + static_assert(internal::is_callable_r<void, C>::value, ""); + static_assert(internal::is_callable_r<const volatile void, C>::value, ""); + static_assert(internal::is_callable_r<char, C>::value, ""); + + // It's possible to provide an int. If it's given to an lvalue, the result is + // void. Otherwise it is std::string (which is also treated as allowed for a + // void result type). + static_assert(internal::is_callable_r<void, C&, int>::value, ""); + static_assert(!internal::is_callable_r<int, C&, int>::value, ""); + static_assert(!internal::is_callable_r<std::string, C&, int>::value, ""); + static_assert(!internal::is_callable_r<void, const C&, int>::value, ""); + + static_assert(internal::is_callable_r<std::string, C, int>::value, ""); + static_assert(internal::is_callable_r<void, C, int>::value, ""); + static_assert(!internal::is_callable_r<int, C, int>::value, ""); + + // It's not possible to provide other arguments. + static_assert(!internal::is_callable_r<void, C, std::string>::value, ""); + static_assert(!internal::is_callable_r<void, C, int, int>::value, ""); + + // In C++17 and above, where it's guaranteed that functions can return + // non-moveable objects, everything should work fine for non-moveable rsult + // types too. + // TODO(b/396121064) - Fix this test under MSVC +#ifndef _MSC_VER + { + struct NonMoveable { + NonMoveable() = default; + NonMoveable(NonMoveable&&) = delete; + }; + + static_assert(!std::is_move_constructible_v<NonMoveable>); + + struct Callable { + NonMoveable operator()() { return NonMoveable(); } + }; + + static_assert(internal::is_callable_r<NonMoveable, Callable>::value); + static_assert(internal::is_callable_r<void, Callable>::value); + static_assert( + internal::is_callable_r<const volatile void, Callable>::value); + + static_assert(!internal::is_callable_r<int, Callable>::value); + static_assert(!internal::is_callable_r<NonMoveable, Callable, int>::value); + } +#endif // _MSC_VER + + // Nothing should choke when we try to call other arguments besides directly + // callable objects, but they should not show up as callable. + static_assert(!internal::is_callable_r<void, int>::value, ""); + static_assert(!internal::is_callable_r<void, void (C::*)()>::value, ""); + static_assert(!internal::is_callable_r<void, void (C::*)(), C*>::value, ""); +} + +// 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<unsigned long long>::Get()); // NOLINT + EXPECT_EQ(0, BuiltInDefaultValue<signed long long>::Get()); // NOLINT + EXPECT_EQ(0, BuiltInDefaultValue<long long>::Get()); // NOLINT + 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<unsigned long long>::Exists()); // NOLINT + EXPECT_TRUE(BuiltInDefaultValue<signed long long>::Exists()); // NOLINT + EXPECT_TRUE(BuiltInDefaultValue<long long>::Exists()); // NOLINT + 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::make_unique<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 initially. +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 constructed 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())); +} + +// Return(x) should work fine when the mock function's return type is a +// reference-like wrapper for decltype(x), as when x is a std::string and the +// mock function returns std::string_view. +TEST(ReturnTest, SupportsReferenceLikeReturnType) { + // A reference wrapper for std::vector<int>, implicitly convertible from it. + struct Result { + const std::vector<int>* v; + Result(const std::vector<int>& vec) : v(&vec) {} // NOLINT + }; + + // Set up an action for a mock function that returns the reference wrapper + // type, initializing it with an actual vector. + // + // The returned wrapper should be initialized with a copy of that vector + // that's embedded within the action itself (which should stay alive as long + // as the mock object is alive), rather than e.g. a reference to the temporary + // we feed to Return. This should work fine both for WillOnce and + // WillRepeatedly. + MockFunction<Result()> mock; + EXPECT_CALL(mock, Call) + .WillOnce(Return(std::vector<int>{17, 19, 23})) + .WillRepeatedly(Return(std::vector<int>{29, 31, 37})); + + EXPECT_THAT(mock.AsStdFunction()(), + Field(&Result::v, Pointee(ElementsAre(17, 19, 23)))); + + EXPECT_THAT(mock.AsStdFunction()(), + Field(&Result::v, Pointee(ElementsAre(29, 31, 37)))); +} + +TEST(ReturnTest, PrefersConversionOperator) { + // Define types In and Out such that: + // + // * In is implicitly convertible to Out. + // * Out also has an explicit constructor from In. + // + struct In; + struct Out { + int x; + + explicit Out(const int val) : x(val) {} + explicit Out(const In&) : x(0) {} + }; + + struct In { + operator Out() const { return Out{19}; } // NOLINT + }; + + // Assumption check: the C++ language rules are such that a function that + // returns Out which uses In a return statement will use the implicit + // conversion path rather than the explicit constructor. + EXPECT_THAT([]() -> Out { return In(); }(), Field(&Out::x, 19)); + + // Return should work the same way: if the mock function's return type is Out + // and we feed Return an In value, then the Out should be created through the + // implicit conversion path rather than the explicit constructor. + MockFunction<Out()> mock; + EXPECT_CALL(mock, Call).WillOnce(Return(In())); + EXPECT_THAT(mock.AsStdFunction()(), Field(&Out::x, 19)); +} + +// It should be possible to use Return(R) with a mock function result type U +// that is convertible from const R& but *not* R (such as +// std::reference_wrapper). This should work for both WillOnce and +// WillRepeatedly. +TEST(ReturnTest, ConversionRequiresConstLvalueReference) { + using R = int; + using U = std::reference_wrapper<const int>; + + static_assert(std::is_convertible<const R&, U>::value, ""); + static_assert(!std::is_convertible<R, U>::value, ""); + + MockFunction<U()> mock; + EXPECT_CALL(mock, Call).WillOnce(Return(17)).WillRepeatedly(Return(19)); + + EXPECT_EQ(17, mock.AsStdFunction()()); + EXPECT_EQ(19, mock.AsStdFunction()()); +} + +// Return(x) should not be usable with a mock function result type that's +// implicitly convertible from decltype(x) but requires a non-const lvalue +// reference to the input. It doesn't make sense for the conversion operator to +// modify the input. +TEST(ReturnTest, ConversionRequiresMutableLvalueReference) { + // Set up a type that is implicitly convertible from std::string&, but not + // std::string&& or `const std::string&`. + // + // Avoid asserting about conversion from std::string on MSVC, which seems to + // implement std::is_convertible incorrectly in this case. + struct S { + S(std::string&) {} // NOLINT + }; + + static_assert(std::is_convertible<std::string&, S>::value, ""); +#ifndef _MSC_VER + static_assert(!std::is_convertible<std::string&&, S>::value, ""); +#endif + static_assert(!std::is_convertible<const std::string&, S>::value, ""); + + // It shouldn't be possible to use the result of Return(std::string) in a + // context where an S is needed. + // + // Here too we disable the assertion for MSVC, since its incorrect + // implementation of is_convertible causes our SFINAE to be wrong. + using RA = decltype(Return(std::string())); + + static_assert(!std::is_convertible<RA, Action<S()>>::value, ""); +#ifndef _MSC_VER + static_assert(!std::is_convertible<RA, OnceAction<S()>>::value, ""); +#endif +} + +TEST(ReturnTest, MoveOnlyResultType) { + // Return should support move-only result types when used with WillOnce. + { + MockFunction<std::unique_ptr<int>()> mock; + EXPECT_CALL(mock, Call) + // NOLINTNEXTLINE + .WillOnce(Return(std::unique_ptr<int>(new int(17)))); + + EXPECT_THAT(mock.AsStdFunction()(), Pointee(17)); + } + + // The result of Return should not be convertible to Action (so it can't be + // used with WillRepeatedly). + static_assert(!std::is_convertible<decltype(Return(std::unique_ptr<int>())), + Action<std::unique_ptr<int>()>>::value, + ""); +} + +// Tests that Return(v) is covariant. + +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_; +}; + +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."; +} + +// 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 scalar_value = 123; + EXPECT_TRUE(CanCallReturnRef(scalar_value)); + + std::string non_scalar_value("ABC"); + EXPECT_TRUE(CanCallReturnRef(non_scalar_value)); + + const int const_scalar_value{321}; + EXPECT_TRUE(CanCallReturnRef(const_scalar_value)); + + const std::string const_non_scalar_value("CBA"); + EXPECT_TRUE(CanCallReturnRef(const_non_scalar_value)); +} + +// Tests that ReturnRef(v) is not working with temporaries (T&&) +TEST(ReturnRefTest, DoesNotWorkForTemporary) { + auto scalar_value = []() -> int { return 123; }; + EXPECT_FALSE(CanCallReturnRef(scalar_value())); + + auto non_scalar_value = []() -> std::string { return "ABC"; }; + EXPECT_FALSE(CanCallReturnRef(non_scalar_value())); + + // cannot use here callable returning "const scalar type", + // because such const for scalar return type is ignored + EXPECT_FALSE(CanCallReturnRef(static_cast<const int>(321))); + + auto const_non_scalar_value = []() -> const std::string { return "CBA"; }; + EXPECT_FALSE(CanCallReturnRef(const_non_scalar_value())); +} + +// 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 ReturnRoundRobin(v) works with initializer lists +TEST(ReturnRoundRobinTest, WorksForInitList) { + Action<int()> ret = ReturnRoundRobin({1, 2, 3}); + + EXPECT_EQ(1, ret.Perform(std::make_tuple())); + EXPECT_EQ(2, ret.Perform(std::make_tuple())); + EXPECT_EQ(3, ret.Perform(std::make_tuple())); + EXPECT_EQ(1, ret.Perform(std::make_tuple())); + EXPECT_EQ(2, ret.Perform(std::make_tuple())); + EXPECT_EQ(3, ret.Perform(std::make_tuple())); +} + +// Tests that ReturnRoundRobin(v) works with vectors +TEST(ReturnRoundRobinTest, WorksForVector) { + std::vector<double> v = {4.4, 5.5, 6.6}; + Action<double()> ret = ReturnRoundRobin(v); + + EXPECT_EQ(4.4, ret.Perform(std::make_tuple())); + EXPECT_EQ(5.5, ret.Perform(std::make_tuple())); + EXPECT_EQ(6.6, ret.Perform(std::make_tuple())); + EXPECT_EQ(4.4, ret.Perform(std::make_tuple())); + EXPECT_EQ(5.5, ret.Perform(std::make_tuple())); + EXPECT_EQ(6.6, ret.Perform(std::make_tuple())); +} + +// Tests that DoDefault() does the default action for the mock method. + +class MockClass { + public: + MockClass() = default; + + 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: + MockClass(const MockClass&) = delete; + MockClass& operator=(const MockClass&) = delete; +}; + +// 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(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 overridden 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(&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(&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); +} + +// DoAll should support &&-qualified actions when used with WillOnce. +TEST(DoAll, SupportsRefQualifiedActions) { + struct InitialAction { + void operator()(const int arg) && { EXPECT_EQ(17, arg); } + }; + + struct FinalAction { + int operator()() && { return 19; } + }; + + MockFunction<int(int)> mock; + EXPECT_CALL(mock, Call).WillOnce(DoAll(InitialAction{}, FinalAction{})); + EXPECT_EQ(19, mock.AsStdFunction()(17)); +} + +// DoAll should never provide rvalue references to the initial actions. If the +// mock action itself accepts an rvalue reference or a non-scalar object by +// value then the final action should receive an rvalue reference, but initial +// actions should receive only lvalue references. +TEST(DoAll, ProvidesLvalueReferencesToInitialActions) { + struct Obj {}; + + // Mock action accepts by value: the initial action should be fed a const + // lvalue reference, and the final action an rvalue reference. + { + struct InitialAction { + void operator()(Obj&) const { FAIL() << "Unexpected call"; } + void operator()(const Obj&) const {} + void operator()(Obj&&) const { FAIL() << "Unexpected call"; } + void operator()(const Obj&&) const { FAIL() << "Unexpected call"; } + }; + + MockFunction<void(Obj)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](Obj&&) {})) + .WillRepeatedly(DoAll(InitialAction{}, InitialAction{}, [](Obj&&) {})); + + mock.AsStdFunction()(Obj{}); + mock.AsStdFunction()(Obj{}); + } + + // Mock action accepts by const lvalue reference: both actions should receive + // a const lvalue reference. + { + struct InitialAction { + void operator()(Obj&) const { FAIL() << "Unexpected call"; } + void operator()(const Obj&) const {} + void operator()(Obj&&) const { FAIL() << "Unexpected call"; } + void operator()(const Obj&&) const { FAIL() << "Unexpected call"; } + }; + + MockFunction<void(const Obj&)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](const Obj&) {})) + .WillRepeatedly( + DoAll(InitialAction{}, InitialAction{}, [](const Obj&) {})); + + mock.AsStdFunction()(Obj{}); + mock.AsStdFunction()(Obj{}); + } + + // Mock action accepts by non-const lvalue reference: both actions should get + // a non-const lvalue reference if they want them. + { + struct InitialAction { + void operator()(Obj&) const {} + void operator()(Obj&&) const { FAIL() << "Unexpected call"; } + }; + + MockFunction<void(Obj&)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](Obj&) {})) + .WillRepeatedly(DoAll(InitialAction{}, InitialAction{}, [](Obj&) {})); + + Obj obj; + mock.AsStdFunction()(obj); + mock.AsStdFunction()(obj); + } + + // Mock action accepts by rvalue reference: the initial actions should receive + // a non-const lvalue reference if it wants it, and the final action an rvalue + // reference. + { + struct InitialAction { + void operator()(Obj&) const {} + void operator()(Obj&&) const { FAIL() << "Unexpected call"; } + }; + + MockFunction<void(Obj&&)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](Obj&&) {})) + .WillRepeatedly(DoAll(InitialAction{}, InitialAction{}, [](Obj&&) {})); + + mock.AsStdFunction()(Obj{}); + mock.AsStdFunction()(Obj{}); + } + + // &&-qualified initial actions should also be allowed with WillOnce. + { + struct InitialAction { + void operator()(Obj&) && {} + }; + + MockFunction<void(Obj&)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](Obj&) {})); + + Obj obj; + mock.AsStdFunction()(obj); + } + + { + struct InitialAction { + void operator()(Obj&) && {} + }; + + MockFunction<void(Obj&&)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(InitialAction{}, InitialAction{}, [](Obj&&) {})); + + mock.AsStdFunction()(Obj{}); + } +} + +// DoAll should support being used with type-erased Action objects, both through +// WillOnce and WillRepeatedly. +TEST(DoAll, SupportsTypeErasedActions) { + // With only type-erased actions. + const Action<void()> initial_action = [] {}; + const Action<int()> final_action = [] { return 17; }; + + MockFunction<int()> mock; + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(initial_action, initial_action, final_action)) + .WillRepeatedly(DoAll(initial_action, initial_action, final_action)); + + EXPECT_EQ(17, mock.AsStdFunction()()); + + // With &&-qualified and move-only final action. + { + struct FinalAction { + FinalAction() = default; + FinalAction(FinalAction&&) = default; + + int operator()() && { return 17; } + }; + + EXPECT_CALL(mock, Call) + .WillOnce(DoAll(initial_action, initial_action, FinalAction{})); + + EXPECT_EQ(17, mock.AsStdFunction()()); + } +} + +// A multi-action DoAll action should be convertible to a OnceAction, even when +// its component sub-actions are user-provided types that define only an Action +// conversion operator. If they supposed being called more than once then they +// also support being called at most once. +// +// Single-arg DoAll just returns its argument, so will prefer the Action<F> +// overload for WillOnce. +TEST(DoAll, ConvertibleToOnceActionWithUserProvidedActionConversion) { + // Final action. + struct CustomFinal final { + operator Action<int()>() { // NOLINT + return Return(17); + } + + operator Action<int(int, char)>() { // NOLINT + return Return(19); + } + }; + + // Sub-actions. + struct CustomInitial final { + operator Action<void()>() { // NOLINT + return [] {}; + } + + operator Action<void(int, char)>() { // NOLINT + return [] {}; + } + }; + + { + OnceAction<int()> action = DoAll(CustomInitial{}, CustomFinal{}); + EXPECT_EQ(17, std::move(action).Call()); + } + + { + OnceAction<int(int, char)> action = DoAll(CustomInitial{}, CustomFinal{}); + EXPECT_EQ(19, std::move(action).Call(0, 0)); + } +} + +// Tests using WithArgs and with an action that takes 1 argument. +TEST(WithArgsTest, OneArg) { + Action<bool(double x, int n)> a = WithArgs<1>(Unary); + 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>(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>(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>(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>(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>(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>(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>(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; }; + + MockFunction<Base*(double)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(WithoutArgs(inner)) + .WillRepeatedly(WithoutArgs(inner)); + + EXPECT_EQ(nullptr, mock.AsStdFunction()(1.1)); + EXPECT_EQ(nullptr, mock.AsStdFunction()(1.1)); +} + +// It should be possible to use an &&-qualified inner action as long as the +// whole shebang is used as an rvalue with WillOnce. +TEST(WithArgsTest, RefQualifiedInnerAction) { + struct SomeAction { + int operator()(const int arg) && { + EXPECT_EQ(17, arg); + return 19; + } + }; + + MockFunction<int(int, int)> mock; + EXPECT_CALL(mock, Call).WillOnce(WithArg<1>(SomeAction{})); + EXPECT_EQ(19, mock.AsStdFunction()(0, 17)); +} + +// It should be fine to provide an lvalue WithArgsAction to WillOnce, even when +// the inner action only wants to convert to OnceAction. +TEST(WithArgsTest, ProvideAsLvalueToWillOnce) { + struct SomeAction { + operator OnceAction<int(int)>() const { // NOLINT + return [](const int arg) { return arg + 2; }; + } + }; + + const auto wa = WithArg<1>(SomeAction{}); + + MockFunction<int(int, int)> mock; + EXPECT_CALL(mock, Call).WillOnce(wa); + EXPECT_EQ(19, mock.AsStdFunction()(0, 17)); +} + +#ifndef 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()); +} + +struct UnaryConstructorClass { + explicit UnaryConstructorClass(int v) : value(v) {} + int value; +}; + +// Tests using ReturnNew() with a unary constructor. +TEST(ReturnNewTest, Unary) { + Action<UnaryConstructorClass*()> a = ReturnNew<UnaryConstructorClass>(4000); + UnaryConstructorClass* c = a.Perform(std::make_tuple()); + EXPECT_EQ(4000, c->value); + delete c; +} + +TEST(ReturnNewTest, UnaryWorksWhenMockMethodHasArgs) { + Action<UnaryConstructorClass*(bool, int)> a = + ReturnNew<UnaryConstructorClass>(4000); + UnaryConstructorClass* c = a.Perform(std::make_tuple(false, 5)); + EXPECT_EQ(4000, c->value); + delete c; +} + +TEST(ReturnNewTest, UnaryWorksWhenMockMethodReturnsPointerToConst) { + Action<const UnaryConstructorClass*()> a = + ReturnNew<UnaryConstructorClass>(4000); + const UnaryConstructorClass* c = a.Perform(std::make_tuple()); + EXPECT_EQ(4000, c->value); + delete c; +} + +class TenArgConstructorClass { + public: + TenArgConstructorClass(int a1, int a2, int a3, int a4, int a5, int a6, int a7, + int a8, int a9, int a10) + : value_(a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10) {} + int value_; +}; + +// Tests using ReturnNew() with a 10-argument constructor. +TEST(ReturnNewTest, ConstructorThatTakes10Arguments) { + Action<TenArgConstructorClass*()> a = ReturnNew<TenArgConstructorClass>( + 1000000000, 200000000, 30000000, 4000000, 500000, 60000, 7000, 800, 90, + 0); + TenArgConstructorClass* c = a.Perform(std::make_tuple()); + EXPECT_EQ(1234567890, c->value_); + delete c; +} + +std::unique_ptr<int> UniquePtrSource() { return std::make_unique<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 = std::make_unique<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 = std::make_unique<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::make_unique<int>(42); }); + EXPECT_EQ(42, *mock.MakeUnique()); + + EXPECT_CALL(mock, MakeUnique()).WillRepeatedly(UniquePtrSource); + EXPECT_CALL(mock, MakeVectorUnique()).WillRepeatedly(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::make_unique<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([](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); +} + +// It should be possible to use callables with an &&-qualified call operator +// with WillOnce, since they will be called only once. This allows actions to +// contain and manipulate move-only types. +TEST(MockMethodTest, ActionHasRvalueRefQualifiedCallOperator) { + struct Return17 { + int operator()() && { return 17; } + }; + + // Action is directly compatible with mocked function type. + { + MockFunction<int()> mock; + EXPECT_CALL(mock, Call).WillOnce(Return17()); + + EXPECT_EQ(17, mock.AsStdFunction()()); + } + + // Action doesn't want mocked function arguments. + { + MockFunction<int(int)> mock; + EXPECT_CALL(mock, Call).WillOnce(Return17()); + + EXPECT_EQ(17, mock.AsStdFunction()(0)); + } +} + +// Edge case: if an action has both a const-qualified and an &&-qualified call +// operator, there should be no "ambiguous call" errors. The &&-qualified +// operator should be used by WillOnce (since it doesn't need to retain the +// action beyond one call), and the const-qualified one by WillRepeatedly. +TEST(MockMethodTest, ActionHasMultipleCallOperators) { + struct ReturnInt { + int operator()() && { return 17; } + int operator()() const& { return 19; } + }; + + // Directly compatible with mocked function type. + { + MockFunction<int()> mock; + EXPECT_CALL(mock, Call).WillOnce(ReturnInt()).WillRepeatedly(ReturnInt()); + + EXPECT_EQ(17, mock.AsStdFunction()()); + EXPECT_EQ(19, mock.AsStdFunction()()); + EXPECT_EQ(19, mock.AsStdFunction()()); + } + + // Ignores function arguments. + { + MockFunction<int(int)> mock; + EXPECT_CALL(mock, Call).WillOnce(ReturnInt()).WillRepeatedly(ReturnInt()); + + EXPECT_EQ(17, mock.AsStdFunction()(0)); + EXPECT_EQ(19, mock.AsStdFunction()(0)); + EXPECT_EQ(19, mock.AsStdFunction()(0)); + } +} + +// WillOnce should have no problem coping with a move-only action, whether it is +// &&-qualified or not. +TEST(MockMethodTest, MoveOnlyAction) { + // &&-qualified + { + struct Return17 { + Return17() = default; + Return17(Return17&&) = default; + + Return17(const Return17&) = delete; + Return17 operator=(const Return17&) = delete; + + int operator()() && { return 17; } + }; + + MockFunction<int()> mock; + EXPECT_CALL(mock, Call).WillOnce(Return17()); + EXPECT_EQ(17, mock.AsStdFunction()()); + } + + // Not &&-qualified + { + struct Return17 { + Return17() = default; + Return17(Return17&&) = default; + + Return17(const Return17&) = delete; + Return17 operator=(const Return17&) = delete; + + int operator()() const { return 17; } + }; + + MockFunction<int()> mock; + EXPECT_CALL(mock, Call).WillOnce(Return17()); + EXPECT_EQ(17, mock.AsStdFunction()()); + } +} + +// It should be possible to use an action that returns a value with a mock +// function that doesn't, both through WillOnce and WillRepeatedly. +TEST(MockMethodTest, ActionReturnsIgnoredValue) { + struct ReturnInt { + int operator()() const { return 0; } + }; + + MockFunction<void()> mock; + EXPECT_CALL(mock, Call).WillOnce(ReturnInt()).WillRepeatedly(ReturnInt()); + + mock.AsStdFunction()(); + mock.AsStdFunction()(); +} + +// Despite the fanciness around move-only actions and so on, it should still be +// possible to hand an lvalue reference to a copyable action to WillOnce. +TEST(MockMethodTest, WillOnceCanAcceptLvalueReference) { + MockFunction<int()> mock; + + const auto action = [] { return 17; }; + EXPECT_CALL(mock, Call).WillOnce(action); + + EXPECT_EQ(17, mock.AsStdFunction()()); +} + +// A callable that doesn't use SFINAE to restrict its call operator's overload +// set, but is still picky about which arguments it will accept. +struct StaticAssertSingleArgument { + template <typename... Args> + static constexpr bool CheckArgs() { + static_assert(sizeof...(Args) == 1, ""); + return true; + } + + template <typename... Args, bool = CheckArgs<Args...>()> + int operator()(Args...) const { + return 17; + } +}; + +// WillOnce and WillRepeatedly should both work fine with naïve implementations +// of actions that don't use SFINAE to limit the overload set for their call +// operator. If they are compatible with the actual mocked signature, we +// shouldn't probe them with no arguments and trip a static_assert. +TEST(MockMethodTest, ActionSwallowsAllArguments) { + MockFunction<int(int)> mock; + EXPECT_CALL(mock, Call) + .WillOnce(StaticAssertSingleArgument{}) + .WillRepeatedly(StaticAssertSingleArgument{}); + + EXPECT_EQ(17, mock.AsStdFunction()(0)); + EXPECT_EQ(17, mock.AsStdFunction()(0)); +} + +struct ActionWithTemplatedConversionOperators { + template <typename... Args> + operator OnceAction<int(Args...)>() && { // NOLINT + return [] { return 17; }; + } + + template <typename... Args> + operator Action<int(Args...)>() const { // NOLINT + return [] { return 19; }; + } +}; + +// It should be fine to hand both WillOnce and WillRepeatedly a function that +// defines templated conversion operators to OnceAction and Action. WillOnce +// should prefer the OnceAction version. +TEST(MockMethodTest, ActionHasTemplatedConversionOperators) { + MockFunction<int()> mock; + EXPECT_CALL(mock, Call) + .WillOnce(ActionWithTemplatedConversionOperators{}) + .WillRepeatedly(ActionWithTemplatedConversionOperators{}); + + EXPECT_EQ(17, mock.AsStdFunction()()); + EXPECT_EQ(19, mock.AsStdFunction()()); +} + +// 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::make_unique<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)> x1 = [](Unused) { return 42; }; + const Action<bool(std::string)> x2 = [] { return 42; }; + EXPECT_TRUE(x1.Perform(std::make_tuple("hello"))); + EXPECT_TRUE(x2.Perform(std::make_tuple("hello"))); + + // Ensure decay occurs where required. + std::function<int()> f = [] { return 7; }; + Action<int(int)> d = f; + f = nullptr; + EXPECT_EQ(7, d.Perform(std::make_tuple(1))); + + // Ensure creation of an empty action succeeds. + (void)Action<void(int)>(nullptr); +} + +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); +} + +ACTION(ReturnArity) { return std::tuple_size<args_type>::value; } + +TEST(ActionMacro, LargeArity) { + EXPECT_EQ( + 1, testing::Action<int(int)>(ReturnArity()).Perform(std::make_tuple(0))); + EXPECT_EQ( + 10, + testing::Action<int(int, int, int, int, int, int, int, int, int, int)>( + ReturnArity()) + .Perform(std::make_tuple(0, 1, 2, 3, 4, 5, 6, 7, 8, 9))); + EXPECT_EQ( + 20, + testing::Action<int(int, int, int, int, int, int, int, int, int, int, int, + int, int, int, int, int, int, int, int, int)>( + ReturnArity()) + .Perform(std::make_tuple(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, + 14, 15, 16, 17, 18, 19))); +} + +} // namespace +} // namespace testing + +#if defined(_MSC_VER) && (_MSC_VER == 1900) +GTEST_DISABLE_MSC_WARNINGS_POP_() // 4800 +#endif +GTEST_DISABLE_MSC_WARNINGS_POP_() // 4100 4503 |