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Diffstat (limited to 'src/spawn/test/dependency/googletest/googlemock/include/gmock/gmock-actions.h')
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diff --git a/src/spawn/test/dependency/googletest/googlemock/include/gmock/gmock-actions.h b/src/spawn/test/dependency/googletest/googlemock/include/gmock/gmock-actions.h new file mode 100644 index 000000000..9605c43a7 --- /dev/null +++ b/src/spawn/test/dependency/googletest/googlemock/include/gmock/gmock-actions.h @@ -0,0 +1,1141 @@ +// 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 implements some commonly used actions. + +// GOOGLETEST_CM0002 DO NOT DELETE + +#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_ +#define GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_ + +#ifndef _WIN32_WCE +# include <errno.h> +#endif + +#include <algorithm> +#include <functional> +#include <memory> +#include <string> +#include <type_traits> +#include <utility> + +#include "gmock/internal/gmock-internal-utils.h" +#include "gmock/internal/gmock-port.h" + +#ifdef _MSC_VER +# pragma warning(push) +# pragma warning(disable:4100) +#endif + +namespace testing { + +// To implement an action Foo, define: +// 1. a class FooAction that implements the ActionInterface interface, and +// 2. a factory function that creates an Action object from a +// const FooAction*. +// +// The two-level delegation design follows that of Matcher, providing +// consistency for extension developers. It also eases ownership +// management as Action objects can now be copied like plain values. + +namespace internal { + +// BuiltInDefaultValueGetter<T, true>::Get() returns a +// default-constructed T value. BuiltInDefaultValueGetter<T, +// false>::Get() crashes with an error. +// +// This primary template is used when kDefaultConstructible is true. +template <typename T, bool kDefaultConstructible> +struct BuiltInDefaultValueGetter { + static T Get() { return T(); } +}; +template <typename T> +struct BuiltInDefaultValueGetter<T, false> { + static T Get() { + Assert(false, __FILE__, __LINE__, + "Default action undefined for the function return type."); + return internal::Invalid<T>(); + // The above statement will never be reached, but is required in + // order for this function to compile. + } +}; + +// BuiltInDefaultValue<T>::Get() returns the "built-in" default value +// for type T, which is NULL when T is a raw pointer type, 0 when T is +// a numeric type, false when T is bool, or "" when T is string or +// std::string. In addition, in C++11 and above, it turns a +// default-constructed T value if T is default constructible. For any +// other type T, the built-in default T value is undefined, and the +// function will abort the process. +template <typename T> +class BuiltInDefaultValue { + public: + // This function returns true if type T has a built-in default value. + static bool Exists() { + return ::std::is_default_constructible<T>::value; + } + + static T Get() { + return BuiltInDefaultValueGetter< + T, ::std::is_default_constructible<T>::value>::Get(); + } +}; + +// This partial specialization says that we use the same built-in +// default value for T and const T. +template <typename T> +class BuiltInDefaultValue<const T> { + public: + static bool Exists() { return BuiltInDefaultValue<T>::Exists(); } + static T Get() { return BuiltInDefaultValue<T>::Get(); } +}; + +// This partial specialization defines the default values for pointer +// types. +template <typename T> +class BuiltInDefaultValue<T*> { + public: + static bool Exists() { return true; } + static T* Get() { return nullptr; } +}; + +// The following specializations define the default values for +// specific types we care about. +#define GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(type, value) \ + template <> \ + class BuiltInDefaultValue<type> { \ + public: \ + static bool Exists() { return true; } \ + static type Get() { return value; } \ + } + +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(void, ); // NOLINT +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(::std::string, ""); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(bool, false); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned char, '\0'); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed char, '\0'); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(char, '\0'); + +// There's no need for a default action for signed wchar_t, as that +// type is the same as wchar_t for gcc, and invalid for MSVC. +// +// There's also no need for a default action for unsigned wchar_t, as +// that type is the same as unsigned int for gcc, and invalid for +// MSVC. +#if GMOCK_WCHAR_T_IS_NATIVE_ +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(wchar_t, 0U); // NOLINT +#endif + +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned short, 0U); // NOLINT +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed short, 0); // NOLINT +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned int, 0U); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed int, 0); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long, 0UL); // NOLINT +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long, 0L); // NOLINT +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(UInt64, 0); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(Int64, 0); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(float, 0); +GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(double, 0); + +#undef GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_ + +} // namespace internal + +// When an unexpected function call is encountered, Google Mock will +// let it return a default value if the user has specified one for its +// return type, or if the return type has a built-in default value; +// otherwise Google Mock won't know what value to return and will have +// to abort the process. +// +// The DefaultValue<T> class allows a user to specify the +// default value for a type T that is both copyable and publicly +// destructible (i.e. anything that can be used as a function return +// type). The usage is: +// +// // Sets the default value for type T to be foo. +// DefaultValue<T>::Set(foo); +template <typename T> +class DefaultValue { + public: + // Sets the default value for type T; requires T to be + // copy-constructable and have a public destructor. + static void Set(T x) { + delete producer_; + producer_ = new FixedValueProducer(x); + } + + // Provides a factory function to be called to generate the default value. + // This method can be used even if T is only move-constructible, but it is not + // limited to that case. + typedef T (*FactoryFunction)(); + static void SetFactory(FactoryFunction factory) { + delete producer_; + producer_ = new FactoryValueProducer(factory); + } + + // Unsets the default value for type T. + static void Clear() { + delete producer_; + producer_ = nullptr; + } + + // Returns true if the user has set the default value for type T. + static bool IsSet() { return producer_ != nullptr; } + + // Returns true if T has a default return value set by the user or there + // exists a built-in default value. + static bool Exists() { + return IsSet() || internal::BuiltInDefaultValue<T>::Exists(); + } + + // Returns the default value for type T if the user has set one; + // otherwise returns the built-in default value. Requires that Exists() + // is true, which ensures that the return value is well-defined. + static T Get() { + return producer_ == nullptr ? internal::BuiltInDefaultValue<T>::Get() + : producer_->Produce(); + } + + private: + class ValueProducer { + public: + virtual ~ValueProducer() {} + virtual T Produce() = 0; + }; + + class FixedValueProducer : public ValueProducer { + public: + explicit FixedValueProducer(T value) : value_(value) {} + T Produce() override { return value_; } + + private: + const T value_; + GTEST_DISALLOW_COPY_AND_ASSIGN_(FixedValueProducer); + }; + + class FactoryValueProducer : public ValueProducer { + public: + explicit FactoryValueProducer(FactoryFunction factory) + : factory_(factory) {} + T Produce() override { return factory_(); } + + private: + const FactoryFunction factory_; + GTEST_DISALLOW_COPY_AND_ASSIGN_(FactoryValueProducer); + }; + + static ValueProducer* producer_; +}; + +// This partial specialization allows a user to set default values for +// reference types. +template <typename T> +class DefaultValue<T&> { + public: + // Sets the default value for type T&. + static void Set(T& x) { // NOLINT + address_ = &x; + } + + // Unsets the default value for type T&. + static void Clear() { address_ = nullptr; } + + // Returns true if the user has set the default value for type T&. + static bool IsSet() { return address_ != nullptr; } + + // Returns true if T has a default return value set by the user or there + // exists a built-in default value. + static bool Exists() { + return IsSet() || internal::BuiltInDefaultValue<T&>::Exists(); + } + + // Returns the default value for type T& if the user has set one; + // otherwise returns the built-in default value if there is one; + // otherwise aborts the process. + static T& Get() { + return address_ == nullptr ? internal::BuiltInDefaultValue<T&>::Get() + : *address_; + } + + private: + static T* address_; +}; + +// This specialization allows DefaultValue<void>::Get() to +// compile. +template <> +class DefaultValue<void> { + public: + static bool Exists() { return true; } + static void Get() {} +}; + +// Points to the user-set default value for type T. +template <typename T> +typename DefaultValue<T>::ValueProducer* DefaultValue<T>::producer_ = nullptr; + +// Points to the user-set default value for type T&. +template <typename T> +T* DefaultValue<T&>::address_ = nullptr; + +// Implement this interface to define an action for function type F. +template <typename F> +class ActionInterface { + public: + typedef typename internal::Function<F>::Result Result; + typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple; + + ActionInterface() {} + virtual ~ActionInterface() {} + + // Performs the action. This method is not const, as in general an + // action can have side effects and be stateful. For example, a + // get-the-next-element-from-the-collection action will need to + // remember the current element. + virtual Result Perform(const ArgumentTuple& args) = 0; + + private: + GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionInterface); +}; + +// An Action<F> is a copyable and IMMUTABLE (except by assignment) +// object that represents an action to be taken when a mock function +// of type F is called. The implementation of Action<T> is just a +// std::shared_ptr to const ActionInterface<T>. Don't inherit from Action! +// You can view an object implementing ActionInterface<F> as a +// concrete action (including its current state), and an Action<F> +// object as a handle to it. +template <typename F> +class Action { + // Adapter class to allow constructing Action from a legacy ActionInterface. + // New code should create Actions from functors instead. + struct ActionAdapter { + // Adapter must be copyable to satisfy std::function requirements. + ::std::shared_ptr<ActionInterface<F>> impl_; + + template <typename... Args> + typename internal::Function<F>::Result operator()(Args&&... args) { + return impl_->Perform( + ::std::forward_as_tuple(::std::forward<Args>(args)...)); + } + }; + + public: + typedef typename internal::Function<F>::Result Result; + typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple; + + // Constructs a null Action. Needed for storing Action objects in + // STL containers. + Action() {} + + // Construct an Action from a specified callable. + // This cannot take std::function directly, because then Action would not be + // directly constructible from lambda (it would require two conversions). + template <typename G, + typename = typename ::std::enable_if< + ::std::is_constructible<::std::function<F>, G>::value>::type> + Action(G&& fun) : fun_(::std::forward<G>(fun)) {} // NOLINT + + // Constructs an Action from its implementation. + explicit Action(ActionInterface<F>* impl) + : fun_(ActionAdapter{::std::shared_ptr<ActionInterface<F>>(impl)}) {} + + // This constructor allows us to turn an Action<Func> object into an + // Action<F>, as long as F's arguments can be implicitly converted + // to Func's and Func's return type can be implicitly converted to F's. + template <typename Func> + explicit Action(const Action<Func>& action) : fun_(action.fun_) {} + + // Returns true if this is the DoDefault() action. + bool IsDoDefault() const { return fun_ == nullptr; } + + // Performs the action. Note that this method is const even though + // the corresponding method in ActionInterface is not. The reason + // is that a const Action<F> means that it cannot be re-bound to + // another concrete action, not that the concrete action it binds to + // cannot change state. (Think of the difference between a const + // pointer and a pointer to const.) + Result Perform(ArgumentTuple args) const { + if (IsDoDefault()) { + internal::IllegalDoDefault(__FILE__, __LINE__); + } + return internal::Apply(fun_, ::std::move(args)); + } + + private: + template <typename G> + friend class Action; + + // fun_ is an empty function if this is the DoDefault() action. + ::std::function<F> fun_; +}; + +// The PolymorphicAction class template makes it easy to implement a +// polymorphic action (i.e. an action that can be used in mock +// functions of than one type, e.g. Return()). +// +// To define a polymorphic action, a user first provides a COPYABLE +// implementation class that has a Perform() method template: +// +// class FooAction { +// public: +// template <typename Result, typename ArgumentTuple> +// Result Perform(const ArgumentTuple& args) const { +// // Processes the arguments and returns a result, using +// // std::get<N>(args) to get the N-th (0-based) argument in the tuple. +// } +// ... +// }; +// +// Then the user creates the polymorphic action using +// MakePolymorphicAction(object) where object has type FooAction. See +// the definition of Return(void) and SetArgumentPointee<N>(value) for +// complete examples. +template <typename Impl> +class PolymorphicAction { + public: + explicit PolymorphicAction(const Impl& impl) : impl_(impl) {} + + template <typename F> + operator Action<F>() const { + return Action<F>(new MonomorphicImpl<F>(impl_)); + } + + private: + template <typename F> + class MonomorphicImpl : public ActionInterface<F> { + public: + typedef typename internal::Function<F>::Result Result; + typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple; + + explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {} + + Result Perform(const ArgumentTuple& args) override { + return impl_.template Perform<Result>(args); + } + + private: + Impl impl_; + + GTEST_DISALLOW_ASSIGN_(MonomorphicImpl); + }; + + Impl impl_; + + GTEST_DISALLOW_ASSIGN_(PolymorphicAction); +}; + +// Creates an Action from its implementation and returns it. The +// created Action object owns the implementation. +template <typename F> +Action<F> MakeAction(ActionInterface<F>* impl) { + return Action<F>(impl); +} + +// Creates a polymorphic action from its implementation. This is +// easier to use than the PolymorphicAction<Impl> constructor as it +// doesn't require you to explicitly write the template argument, e.g. +// +// MakePolymorphicAction(foo); +// vs +// PolymorphicAction<TypeOfFoo>(foo); +template <typename Impl> +inline PolymorphicAction<Impl> MakePolymorphicAction(const Impl& impl) { + return PolymorphicAction<Impl>(impl); +} + +namespace internal { + +// Helper struct to specialize ReturnAction to execute a move instead of a copy +// on return. Useful for move-only types, but could be used on any type. +template <typename T> +struct ByMoveWrapper { + explicit ByMoveWrapper(T value) : payload(std::move(value)) {} + T payload; +}; + +// Implements the polymorphic Return(x) action, which can be used in +// any function that returns the type of x, regardless of the argument +// types. +// +// Note: The value passed into Return must be converted into +// Function<F>::Result when this action is cast to Action<F> rather than +// when that action is performed. This is important in scenarios like +// +// MOCK_METHOD1(Method, T(U)); +// ... +// { +// Foo foo; +// X x(&foo); +// EXPECT_CALL(mock, Method(_)).WillOnce(Return(x)); +// } +// +// In the example above the variable x holds reference to foo which leaves +// scope and gets destroyed. If copying X just copies a reference to foo, +// that copy will be left with a hanging reference. If conversion to T +// makes a copy of foo, the above code is safe. To support that scenario, we +// need to make sure that the type conversion happens inside the EXPECT_CALL +// statement, and conversion of the result of Return to Action<T(U)> is a +// good place for that. +// +// The real life example of the above scenario happens when an invocation +// of gtl::Container() is passed into Return. +// +template <typename R> +class ReturnAction { + public: + // Constructs a ReturnAction object from the value to be returned. + // 'value' is passed by value instead of by const reference in order + // to allow Return("string literal") to compile. + explicit ReturnAction(R value) : value_(new R(std::move(value))) {} + + // This template type conversion operator allows Return(x) to be + // used in ANY function that returns x's type. + template <typename F> + operator Action<F>() const { // NOLINT + // Assert statement belongs here because this is the best place to verify + // conditions on F. It produces the clearest error messages + // in most compilers. + // Impl really belongs in this scope as a local class but can't + // because MSVC produces duplicate symbols in different translation units + // in this case. Until MS fixes that bug we put Impl into the class scope + // and put the typedef both here (for use in assert statement) and + // in the Impl class. But both definitions must be the same. + typedef typename Function<F>::Result Result; + GTEST_COMPILE_ASSERT_( + !std::is_reference<Result>::value, + use_ReturnRef_instead_of_Return_to_return_a_reference); + static_assert(!std::is_void<Result>::value, + "Can't use Return() on an action expected to return `void`."); + return Action<F>(new Impl<R, F>(value_)); + } + + private: + // Implements the Return(x) action for a particular function type F. + template <typename R_, typename F> + class Impl : public ActionInterface<F> { + public: + typedef typename Function<F>::Result Result; + typedef typename Function<F>::ArgumentTuple ArgumentTuple; + + // The implicit cast is necessary when Result has more than one + // single-argument constructor (e.g. Result is std::vector<int>) and R + // has a type conversion operator template. In that case, value_(value) + // won't compile as the compiler doesn't known which constructor of + // Result to call. ImplicitCast_ forces the compiler to convert R to + // Result without considering explicit constructors, thus resolving the + // ambiguity. value_ is then initialized using its copy constructor. + explicit Impl(const std::shared_ptr<R>& value) + : value_before_cast_(*value), + value_(ImplicitCast_<Result>(value_before_cast_)) {} + + Result Perform(const ArgumentTuple&) override { return value_; } + + private: + GTEST_COMPILE_ASSERT_(!std::is_reference<Result>::value, + Result_cannot_be_a_reference_type); + // We save the value before casting just in case it is being cast to a + // wrapper type. + R value_before_cast_; + Result value_; + + GTEST_DISALLOW_COPY_AND_ASSIGN_(Impl); + }; + + // Partially specialize for ByMoveWrapper. This version of ReturnAction will + // move its contents instead. + template <typename R_, typename F> + class Impl<ByMoveWrapper<R_>, F> : public ActionInterface<F> { + public: + typedef typename Function<F>::Result Result; + typedef typename Function<F>::ArgumentTuple ArgumentTuple; + + explicit Impl(const std::shared_ptr<R>& wrapper) + : performed_(false), wrapper_(wrapper) {} + + Result Perform(const ArgumentTuple&) override { + GTEST_CHECK_(!performed_) + << "A ByMove() action should only be performed once."; + performed_ = true; + return std::move(wrapper_->payload); + } + + private: + bool performed_; + const std::shared_ptr<R> wrapper_; + + GTEST_DISALLOW_ASSIGN_(Impl); + }; + + const std::shared_ptr<R> value_; + + GTEST_DISALLOW_ASSIGN_(ReturnAction); +}; + +// Implements the ReturnNull() action. +class ReturnNullAction { + public: + // Allows ReturnNull() to be used in any pointer-returning function. In C++11 + // this is enforced by returning nullptr, and in non-C++11 by asserting a + // pointer type on compile time. + template <typename Result, typename ArgumentTuple> + static Result Perform(const ArgumentTuple&) { + return nullptr; + } +}; + +// Implements the Return() action. +class ReturnVoidAction { + public: + // Allows Return() to be used in any void-returning function. + template <typename Result, typename ArgumentTuple> + static void Perform(const ArgumentTuple&) { + CompileAssertTypesEqual<void, Result>(); + } +}; + +// Implements the polymorphic ReturnRef(x) action, which can be used +// in any function that returns a reference to the type of x, +// regardless of the argument types. +template <typename T> +class ReturnRefAction { + public: + // Constructs a ReturnRefAction object from the reference to be returned. + explicit ReturnRefAction(T& ref) : ref_(ref) {} // NOLINT + + // This template type conversion operator allows ReturnRef(x) to be + // used in ANY function that returns a reference to x's type. + template <typename F> + operator Action<F>() const { + typedef typename Function<F>::Result Result; + // Asserts that the function return type is a reference. This + // catches the user error of using ReturnRef(x) when Return(x) + // should be used, and generates some helpful error message. + GTEST_COMPILE_ASSERT_(std::is_reference<Result>::value, + use_Return_instead_of_ReturnRef_to_return_a_value); + return Action<F>(new Impl<F>(ref_)); + } + + private: + // Implements the ReturnRef(x) action for a particular function type F. + template <typename F> + class Impl : public ActionInterface<F> { + public: + typedef typename Function<F>::Result Result; + typedef typename Function<F>::ArgumentTuple ArgumentTuple; + + explicit Impl(T& ref) : ref_(ref) {} // NOLINT + + Result Perform(const ArgumentTuple&) override { return ref_; } + + private: + T& ref_; + + GTEST_DISALLOW_ASSIGN_(Impl); + }; + + T& ref_; + + GTEST_DISALLOW_ASSIGN_(ReturnRefAction); +}; + +// Implements the polymorphic ReturnRefOfCopy(x) action, which can be +// used in any function that returns a reference to the type of x, +// regardless of the argument types. +template <typename T> +class ReturnRefOfCopyAction { + public: + // Constructs a ReturnRefOfCopyAction object from the reference to + // be returned. + explicit ReturnRefOfCopyAction(const T& value) : value_(value) {} // NOLINT + + // This template type conversion operator allows ReturnRefOfCopy(x) to be + // used in ANY function that returns a reference to x's type. + template <typename F> + operator Action<F>() const { + typedef typename Function<F>::Result Result; + // Asserts that the function return type is a reference. This + // catches the user error of using ReturnRefOfCopy(x) when Return(x) + // should be used, and generates some helpful error message. + GTEST_COMPILE_ASSERT_( + std::is_reference<Result>::value, + use_Return_instead_of_ReturnRefOfCopy_to_return_a_value); + return Action<F>(new Impl<F>(value_)); + } + + private: + // Implements the ReturnRefOfCopy(x) action for a particular function type F. + template <typename F> + class Impl : public ActionInterface<F> { + public: + typedef typename Function<F>::Result Result; + typedef typename Function<F>::ArgumentTuple ArgumentTuple; + + explicit Impl(const T& value) : value_(value) {} // NOLINT + + Result Perform(const ArgumentTuple&) override { return value_; } + + private: + T value_; + + GTEST_DISALLOW_ASSIGN_(Impl); + }; + + const T value_; + + GTEST_DISALLOW_ASSIGN_(ReturnRefOfCopyAction); +}; + +// Implements the polymorphic DoDefault() action. +class DoDefaultAction { + public: + // This template type conversion operator allows DoDefault() to be + // used in any function. + template <typename F> + operator Action<F>() const { return Action<F>(); } // NOLINT +}; + +// Implements the Assign action to set a given pointer referent to a +// particular value. +template <typename T1, typename T2> +class AssignAction { + public: + AssignAction(T1* ptr, T2 value) : ptr_(ptr), value_(value) {} + + template <typename Result, typename ArgumentTuple> + void Perform(const ArgumentTuple& /* args */) const { + *ptr_ = value_; + } + + private: + T1* const ptr_; + const T2 value_; + + GTEST_DISALLOW_ASSIGN_(AssignAction); +}; + +#if !GTEST_OS_WINDOWS_MOBILE + +// Implements the SetErrnoAndReturn action to simulate return from +// various system calls and libc functions. +template <typename T> +class SetErrnoAndReturnAction { + public: + SetErrnoAndReturnAction(int errno_value, T result) + : errno_(errno_value), + result_(result) {} + template <typename Result, typename ArgumentTuple> + Result Perform(const ArgumentTuple& /* args */) const { + errno = errno_; + return result_; + } + + private: + const int errno_; + const T result_; + + GTEST_DISALLOW_ASSIGN_(SetErrnoAndReturnAction); +}; + +#endif // !GTEST_OS_WINDOWS_MOBILE + +// Implements the SetArgumentPointee<N>(x) action for any function +// whose N-th argument (0-based) is a pointer to x's type. +template <size_t N, typename A, typename = void> +struct SetArgumentPointeeAction { + A value; + + template <typename... Args> + void operator()(const Args&... args) const { + *::std::get<N>(std::tie(args...)) = value; + } +}; + +// Implements the Invoke(object_ptr, &Class::Method) action. +template <class Class, typename MethodPtr> +struct InvokeMethodAction { + Class* const obj_ptr; + const MethodPtr method_ptr; + + template <typename... Args> + auto operator()(Args&&... args) const + -> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) { + return (obj_ptr->*method_ptr)(std::forward<Args>(args)...); + } +}; + +// Implements the InvokeWithoutArgs(f) action. The template argument +// FunctionImpl is the implementation type of f, which can be either a +// function pointer or a functor. InvokeWithoutArgs(f) can be used as an +// Action<F> as long as f's type is compatible with F. +template <typename FunctionImpl> +struct InvokeWithoutArgsAction { + FunctionImpl function_impl; + + // Allows InvokeWithoutArgs(f) to be used as any action whose type is + // compatible with f. + template <typename... Args> + auto operator()(const Args&...) -> decltype(function_impl()) { + return function_impl(); + } +}; + +// Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action. +template <class Class, typename MethodPtr> +struct InvokeMethodWithoutArgsAction { + Class* const obj_ptr; + const MethodPtr method_ptr; + + using ReturnType = typename std::result_of<MethodPtr(Class*)>::type; + + template <typename... Args> + ReturnType operator()(const Args&...) const { + return (obj_ptr->*method_ptr)(); + } +}; + +// Implements the IgnoreResult(action) action. +template <typename A> +class IgnoreResultAction { + public: + explicit IgnoreResultAction(const A& action) : action_(action) {} + + template <typename F> + operator Action<F>() const { + // Assert statement belongs here because this is the best place to verify + // conditions on F. It produces the clearest error messages + // in most compilers. + // Impl really belongs in this scope as a local class but can't + // because MSVC produces duplicate symbols in different translation units + // in this case. Until MS fixes that bug we put Impl into the class scope + // and put the typedef both here (for use in assert statement) and + // in the Impl class. But both definitions must be the same. + typedef typename internal::Function<F>::Result Result; + + // Asserts at compile time that F returns void. + CompileAssertTypesEqual<void, Result>(); + + return Action<F>(new Impl<F>(action_)); + } + + private: + template <typename F> + class Impl : public ActionInterface<F> { + public: + typedef typename internal::Function<F>::Result Result; + typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple; + + explicit Impl(const A& action) : action_(action) {} + + void Perform(const ArgumentTuple& args) override { + // Performs the action and ignores its result. + action_.Perform(args); + } + + private: + // Type OriginalFunction is the same as F except that its return + // type is IgnoredValue. + typedef typename internal::Function<F>::MakeResultIgnoredValue + OriginalFunction; + + const Action<OriginalFunction> action_; + + GTEST_DISALLOW_ASSIGN_(Impl); + }; + + const A action_; + + GTEST_DISALLOW_ASSIGN_(IgnoreResultAction); +}; + +template <typename InnerAction, size_t... I> +struct WithArgsAction { + InnerAction action; + + // The inner action could be anything convertible to Action<X>. + // We use the conversion operator to detect the signature of the inner Action. + template <typename R, typename... Args> + operator Action<R(Args...)>() const { // NOLINT + Action<R(typename std::tuple_element<I, std::tuple<Args...>>::type...)> + converted(action); + + return [converted](Args... args) -> R { + return converted.Perform(std::forward_as_tuple( + std::get<I>(std::forward_as_tuple(std::forward<Args>(args)...))...)); + }; + } +}; + +template <typename... Actions> +struct DoAllAction { + private: + template <typename... Args, size_t... I> + std::vector<Action<void(Args...)>> Convert(IndexSequence<I...>) const { + return {std::get<I>(actions)...}; + } + + public: + std::tuple<Actions...> actions; + + template <typename R, typename... Args> + operator Action<R(Args...)>() const { // NOLINT + struct Op { + std::vector<Action<void(Args...)>> converted; + Action<R(Args...)> last; + R operator()(Args... args) const { + auto tuple_args = std::forward_as_tuple(std::forward<Args>(args)...); + for (auto& a : converted) { + a.Perform(tuple_args); + } + return last.Perform(tuple_args); + } + }; + return Op{Convert<Args...>(MakeIndexSequence<sizeof...(Actions) - 1>()), + std::get<sizeof...(Actions) - 1>(actions)}; + } +}; + +} // namespace internal + +// An Unused object can be implicitly constructed from ANY value. +// This is handy when defining actions that ignore some or all of the +// mock function arguments. For example, given +// +// MOCK_METHOD3(Foo, double(const string& label, double x, double y)); +// MOCK_METHOD3(Bar, double(int index, double x, double y)); +// +// instead of +// +// double DistanceToOriginWithLabel(const string& label, double x, double y) { +// return sqrt(x*x + y*y); +// } +// double DistanceToOriginWithIndex(int index, double x, double y) { +// return sqrt(x*x + y*y); +// } +// ... +// EXPECT_CALL(mock, Foo("abc", _, _)) +// .WillOnce(Invoke(DistanceToOriginWithLabel)); +// EXPECT_CALL(mock, Bar(5, _, _)) +// .WillOnce(Invoke(DistanceToOriginWithIndex)); +// +// you could write +// +// // We can declare any uninteresting argument as Unused. +// double DistanceToOrigin(Unused, double x, double y) { +// return sqrt(x*x + y*y); +// } +// ... +// EXPECT_CALL(mock, Foo("abc", _, _)).WillOnce(Invoke(DistanceToOrigin)); +// EXPECT_CALL(mock, Bar(5, _, _)).WillOnce(Invoke(DistanceToOrigin)); +typedef internal::IgnoredValue Unused; + +// Creates an action that does actions a1, a2, ..., sequentially in +// each invocation. +template <typename... Action> +internal::DoAllAction<typename std::decay<Action>::type...> DoAll( + Action&&... action) { + return {std::forward_as_tuple(std::forward<Action>(action)...)}; +} + +// WithArg<k>(an_action) creates an action that passes the k-th +// (0-based) argument of the mock function to an_action and performs +// it. It adapts an action accepting one argument to one that accepts +// multiple arguments. For convenience, we also provide +// WithArgs<k>(an_action) (defined below) as a synonym. +template <size_t k, typename InnerAction> +internal::WithArgsAction<typename std::decay<InnerAction>::type, k> +WithArg(InnerAction&& action) { + return {std::forward<InnerAction>(action)}; +} + +// WithArgs<N1, N2, ..., Nk>(an_action) creates an action that passes +// the selected arguments of the mock function to an_action and +// performs it. It serves as an adaptor between actions with +// different argument lists. +template <size_t k, size_t... ks, typename InnerAction> +internal::WithArgsAction<typename std::decay<InnerAction>::type, k, ks...> +WithArgs(InnerAction&& action) { + return {std::forward<InnerAction>(action)}; +} + +// WithoutArgs(inner_action) can be used in a mock function with a +// non-empty argument list to perform inner_action, which takes no +// argument. In other words, it adapts an action accepting no +// argument to one that accepts (and ignores) arguments. +template <typename InnerAction> +internal::WithArgsAction<typename std::decay<InnerAction>::type> +WithoutArgs(InnerAction&& action) { + return {std::forward<InnerAction>(action)}; +} + +// Creates an action that returns 'value'. 'value' is passed by value +// instead of const reference - otherwise Return("string literal") +// will trigger a compiler error about using array as initializer. +template <typename R> +internal::ReturnAction<R> Return(R value) { + return internal::ReturnAction<R>(std::move(value)); +} + +// Creates an action that returns NULL. +inline PolymorphicAction<internal::ReturnNullAction> ReturnNull() { + return MakePolymorphicAction(internal::ReturnNullAction()); +} + +// Creates an action that returns from a void function. +inline PolymorphicAction<internal::ReturnVoidAction> Return() { + return MakePolymorphicAction(internal::ReturnVoidAction()); +} + +// Creates an action that returns the reference to a variable. +template <typename R> +inline internal::ReturnRefAction<R> ReturnRef(R& x) { // NOLINT + return internal::ReturnRefAction<R>(x); +} + +// Creates an action that returns the reference to a copy of the +// argument. The copy is created when the action is constructed and +// lives as long as the action. +template <typename R> +inline internal::ReturnRefOfCopyAction<R> ReturnRefOfCopy(const R& x) { + return internal::ReturnRefOfCopyAction<R>(x); +} + +// Modifies the parent action (a Return() action) to perform a move of the +// argument instead of a copy. +// Return(ByMove()) actions can only be executed once and will assert this +// invariant. +template <typename R> +internal::ByMoveWrapper<R> ByMove(R x) { + return internal::ByMoveWrapper<R>(std::move(x)); +} + +// Creates an action that does the default action for the give mock function. +inline internal::DoDefaultAction DoDefault() { + return internal::DoDefaultAction(); +} + +// Creates an action that sets the variable pointed by the N-th +// (0-based) function argument to 'value'. +template <size_t N, typename T> +internal::SetArgumentPointeeAction<N, T> SetArgPointee(T x) { + return {std::move(x)}; +} + +// The following version is DEPRECATED. +template <size_t N, typename T> +internal::SetArgumentPointeeAction<N, T> SetArgumentPointee(T x) { + return {std::move(x)}; +} + +// Creates an action that sets a pointer referent to a given value. +template <typename T1, typename T2> +PolymorphicAction<internal::AssignAction<T1, T2> > Assign(T1* ptr, T2 val) { + return MakePolymorphicAction(internal::AssignAction<T1, T2>(ptr, val)); +} + +#if !GTEST_OS_WINDOWS_MOBILE + +// Creates an action that sets errno and returns the appropriate error. +template <typename T> +PolymorphicAction<internal::SetErrnoAndReturnAction<T> > +SetErrnoAndReturn(int errval, T result) { + return MakePolymorphicAction( + internal::SetErrnoAndReturnAction<T>(errval, result)); +} + +#endif // !GTEST_OS_WINDOWS_MOBILE + +// Various overloads for Invoke(). + +// Legacy function. +// Actions can now be implicitly constructed from callables. No need to create +// wrapper objects. +// This function exists for backwards compatibility. +template <typename FunctionImpl> +typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) { + return std::forward<FunctionImpl>(function_impl); +} + +// Creates an action that invokes the given method on the given object +// with the mock function's arguments. +template <class Class, typename MethodPtr> +internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr, + MethodPtr method_ptr) { + return {obj_ptr, method_ptr}; +} + +// Creates an action that invokes 'function_impl' with no argument. +template <typename FunctionImpl> +internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type> +InvokeWithoutArgs(FunctionImpl function_impl) { + return {std::move(function_impl)}; +} + +// Creates an action that invokes the given method on the given object +// with no argument. +template <class Class, typename MethodPtr> +internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs( + Class* obj_ptr, MethodPtr method_ptr) { + return {obj_ptr, method_ptr}; +} + +// Creates an action that performs an_action and throws away its +// result. In other words, it changes the return type of an_action to +// void. an_action MUST NOT return void, or the code won't compile. +template <typename A> +inline internal::IgnoreResultAction<A> IgnoreResult(const A& an_action) { + return internal::IgnoreResultAction<A>(an_action); +} + +// Creates a reference wrapper for the given L-value. If necessary, +// you can explicitly specify the type of the reference. For example, +// suppose 'derived' is an object of type Derived, ByRef(derived) +// would wrap a Derived&. If you want to wrap a const Base& instead, +// where Base is a base class of Derived, just write: +// +// ByRef<const Base>(derived) +// +// N.B. ByRef is redundant with std::ref, std::cref and std::reference_wrapper. +// However, it may still be used for consistency with ByMove(). +template <typename T> +inline ::std::reference_wrapper<T> ByRef(T& l_value) { // NOLINT + return ::std::reference_wrapper<T>(l_value); +} + +} // namespace testing + +#ifdef _MSC_VER +# pragma warning(pop) +#endif + + +#endif // GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_ |