1143 lines
39 KiB
1143 lines
39 KiB
4 years ago
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// Copyright 2007, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Google Mock - a framework for writing C++ mock classes.
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//
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// This file implements some commonly used actions.
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// GOOGLETEST_CM0002 DO NOT DELETE
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#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
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#define GMOCK_INCLUDE_GMOCK_GMOCK_ACTIONS_H_
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#ifndef _WIN32_WCE
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# include <errno.h>
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#endif
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#include <algorithm>
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#include <functional>
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <utility>
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#include "gmock/internal/gmock-internal-utils.h"
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#include "gmock/internal/gmock-port.h"
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#ifdef _MSC_VER
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# pragma warning(push)
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# pragma warning(disable:4100)
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#endif
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namespace testing {
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// To implement an action Foo, define:
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// 1. a class FooAction that implements the ActionInterface interface, and
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// 2. a factory function that creates an Action object from a
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// const FooAction*.
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//
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// The two-level delegation design follows that of Matcher, providing
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// consistency for extension developers. It also eases ownership
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// management as Action objects can now be copied like plain values.
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namespace internal {
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// BuiltInDefaultValueGetter<T, true>::Get() returns a
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// default-constructed T value. BuiltInDefaultValueGetter<T,
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// false>::Get() crashes with an error.
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//
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// This primary template is used when kDefaultConstructible is true.
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template <typename T, bool kDefaultConstructible>
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struct BuiltInDefaultValueGetter {
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static T Get() { return T(); }
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};
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template <typename T>
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struct BuiltInDefaultValueGetter<T, false> {
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static T Get() {
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Assert(false, __FILE__, __LINE__,
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"Default action undefined for the function return type.");
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return internal::Invalid<T>();
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// The above statement will never be reached, but is required in
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// order for this function to compile.
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}
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};
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// BuiltInDefaultValue<T>::Get() returns the "built-in" default value
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// for type T, which is NULL when T is a raw pointer type, 0 when T is
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// a numeric type, false when T is bool, or "" when T is string or
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// std::string. In addition, in C++11 and above, it turns a
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// default-constructed T value if T is default constructible. For any
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// other type T, the built-in default T value is undefined, and the
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// function will abort the process.
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template <typename T>
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class BuiltInDefaultValue {
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public:
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// This function returns true if and only if type T has a built-in default
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// value.
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static bool Exists() {
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return ::std::is_default_constructible<T>::value;
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}
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static T Get() {
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return BuiltInDefaultValueGetter<
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T, ::std::is_default_constructible<T>::value>::Get();
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}
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};
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// This partial specialization says that we use the same built-in
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// default value for T and const T.
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template <typename T>
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class BuiltInDefaultValue<const T> {
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public:
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static bool Exists() { return BuiltInDefaultValue<T>::Exists(); }
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static T Get() { return BuiltInDefaultValue<T>::Get(); }
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};
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// This partial specialization defines the default values for pointer
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// types.
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template <typename T>
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class BuiltInDefaultValue<T*> {
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public:
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static bool Exists() { return true; }
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static T* Get() { return nullptr; }
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};
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// The following specializations define the default values for
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// specific types we care about.
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#define GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(type, value) \
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template <> \
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class BuiltInDefaultValue<type> { \
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public: \
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static bool Exists() { return true; } \
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static type Get() { return value; } \
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}
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(void, ); // NOLINT
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(::std::string, "");
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(bool, false);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned char, '\0');
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed char, '\0');
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(char, '\0');
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// There's no need for a default action for signed wchar_t, as that
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// type is the same as wchar_t for gcc, and invalid for MSVC.
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//
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// There's also no need for a default action for unsigned wchar_t, as
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// that type is the same as unsigned int for gcc, and invalid for
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// MSVC.
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#if GMOCK_WCHAR_T_IS_NATIVE_
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(wchar_t, 0U); // NOLINT
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#endif
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned short, 0U); // NOLINT
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed short, 0); // NOLINT
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned int, 0U);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed int, 0);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(unsigned long, 0UL); // NOLINT
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(signed long, 0L); // NOLINT
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(UInt64, 0);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(Int64, 0);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(float, 0);
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GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_(double, 0);
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#undef GMOCK_DEFINE_DEFAULT_ACTION_FOR_RETURN_TYPE_
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} // namespace internal
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// When an unexpected function call is encountered, Google Mock will
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// let it return a default value if the user has specified one for its
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// return type, or if the return type has a built-in default value;
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// otherwise Google Mock won't know what value to return and will have
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// to abort the process.
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//
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// The DefaultValue<T> class allows a user to specify the
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// default value for a type T that is both copyable and publicly
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// destructible (i.e. anything that can be used as a function return
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// type). The usage is:
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//
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// // Sets the default value for type T to be foo.
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// DefaultValue<T>::Set(foo);
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template <typename T>
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class DefaultValue {
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public:
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// Sets the default value for type T; requires T to be
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// copy-constructable and have a public destructor.
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static void Set(T x) {
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delete producer_;
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producer_ = new FixedValueProducer(x);
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}
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// Provides a factory function to be called to generate the default value.
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// This method can be used even if T is only move-constructible, but it is not
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// limited to that case.
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typedef T (*FactoryFunction)();
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static void SetFactory(FactoryFunction factory) {
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delete producer_;
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producer_ = new FactoryValueProducer(factory);
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}
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// Unsets the default value for type T.
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static void Clear() {
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delete producer_;
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producer_ = nullptr;
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}
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// Returns true if and only if the user has set the default value for type T.
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static bool IsSet() { return producer_ != nullptr; }
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// Returns true if T has a default return value set by the user or there
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// exists a built-in default value.
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static bool Exists() {
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return IsSet() || internal::BuiltInDefaultValue<T>::Exists();
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}
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// Returns the default value for type T if the user has set one;
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// otherwise returns the built-in default value. Requires that Exists()
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// is true, which ensures that the return value is well-defined.
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static T Get() {
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return producer_ == nullptr ? internal::BuiltInDefaultValue<T>::Get()
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: producer_->Produce();
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}
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private:
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class ValueProducer {
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public:
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virtual ~ValueProducer() {}
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virtual T Produce() = 0;
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};
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class FixedValueProducer : public ValueProducer {
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public:
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explicit FixedValueProducer(T value) : value_(value) {}
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T Produce() override { return value_; }
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private:
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const T value_;
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GTEST_DISALLOW_COPY_AND_ASSIGN_(FixedValueProducer);
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};
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class FactoryValueProducer : public ValueProducer {
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public:
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explicit FactoryValueProducer(FactoryFunction factory)
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: factory_(factory) {}
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T Produce() override { return factory_(); }
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private:
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const FactoryFunction factory_;
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GTEST_DISALLOW_COPY_AND_ASSIGN_(FactoryValueProducer);
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};
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static ValueProducer* producer_;
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};
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// This partial specialization allows a user to set default values for
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// reference types.
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template <typename T>
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class DefaultValue<T&> {
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public:
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// Sets the default value for type T&.
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static void Set(T& x) { // NOLINT
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address_ = &x;
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}
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// Unsets the default value for type T&.
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static void Clear() { address_ = nullptr; }
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// Returns true if and only if the user has set the default value for type T&.
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static bool IsSet() { return address_ != nullptr; }
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// Returns true if T has a default return value set by the user or there
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// exists a built-in default value.
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static bool Exists() {
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return IsSet() || internal::BuiltInDefaultValue<T&>::Exists();
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}
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// Returns the default value for type T& if the user has set one;
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// otherwise returns the built-in default value if there is one;
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// otherwise aborts the process.
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static T& Get() {
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return address_ == nullptr ? internal::BuiltInDefaultValue<T&>::Get()
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: *address_;
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}
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private:
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static T* address_;
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};
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// This specialization allows DefaultValue<void>::Get() to
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// compile.
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template <>
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class DefaultValue<void> {
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public:
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static bool Exists() { return true; }
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static void Get() {}
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};
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// Points to the user-set default value for type T.
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template <typename T>
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typename DefaultValue<T>::ValueProducer* DefaultValue<T>::producer_ = nullptr;
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// Points to the user-set default value for type T&.
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template <typename T>
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T* DefaultValue<T&>::address_ = nullptr;
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// Implement this interface to define an action for function type F.
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template <typename F>
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class ActionInterface {
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public:
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typedef typename internal::Function<F>::Result Result;
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typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
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ActionInterface() {}
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virtual ~ActionInterface() {}
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// Performs the action. This method is not const, as in general an
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// action can have side effects and be stateful. For example, a
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// get-the-next-element-from-the-collection action will need to
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// remember the current element.
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virtual Result Perform(const ArgumentTuple& args) = 0;
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private:
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GTEST_DISALLOW_COPY_AND_ASSIGN_(ActionInterface);
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};
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// An Action<F> is a copyable and IMMUTABLE (except by assignment)
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// object that represents an action to be taken when a mock function
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// of type F is called. The implementation of Action<T> is just a
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// std::shared_ptr to const ActionInterface<T>. Don't inherit from Action!
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// You can view an object implementing ActionInterface<F> as a
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// concrete action (including its current state), and an Action<F>
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// object as a handle to it.
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template <typename F>
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class Action {
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// Adapter class to allow constructing Action from a legacy ActionInterface.
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// New code should create Actions from functors instead.
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struct ActionAdapter {
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// Adapter must be copyable to satisfy std::function requirements.
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::std::shared_ptr<ActionInterface<F>> impl_;
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template <typename... Args>
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typename internal::Function<F>::Result operator()(Args&&... args) {
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return impl_->Perform(
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::std::forward_as_tuple(::std::forward<Args>(args)...));
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||
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}
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};
|
||
|
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||
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public:
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typedef typename internal::Function<F>::Result Result;
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typedef typename internal::Function<F>::ArgumentTuple ArgumentTuple;
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||
|
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||
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// Constructs a null Action. Needed for storing Action objects in
|
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// STL containers.
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Action() {}
|
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|
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// Construct an Action from a specified callable.
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// This cannot take std::function directly, because then Action would not be
|
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// directly constructible from lambda (it would require two conversions).
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template <typename G,
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typename = typename ::std::enable_if<
|
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::std::is_constructible<::std::function<F>, G>::value>::type>
|
||
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Action(G&& fun) : fun_(::std::forward<G>(fun)) {} // NOLINT
|
||
|
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||
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// Constructs an Action from its implementation.
|
||
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explicit Action(ActionInterface<F>* impl)
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||
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: fun_(ActionAdapter{::std::shared_ptr<ActionInterface<F>>(impl)}) {}
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||
|
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||
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// This constructor allows us to turn an Action<Func> object into an
|
||
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// Action<F>, as long as F's arguments can be implicitly converted
|
||
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// to Func's and Func's return type can be implicitly converted to F's.
|
||
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template <typename Func>
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||
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explicit Action(const Action<Func>& action) : fun_(action.fun_) {}
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||
|
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||
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// Returns true if and only if this is the DoDefault() action.
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||
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bool IsDoDefault() const { return fun_ == nullptr; }
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||
|
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||
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// Performs the action. Note that this method is const even though
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||
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// the corresponding method in ActionInterface is not. The reason
|
||
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// is that a const Action<F> means that it cannot be re-bound to
|
||
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// another concrete action, not that the concrete action it binds to
|
||
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// cannot change state. (Think of the difference between a const
|
||
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// pointer and a pointer to const.)
|
||
|
Result Perform(ArgumentTuple args) const {
|
||
|
if (IsDoDefault()) {
|
||
|
internal::IllegalDoDefault(__FILE__, __LINE__);
|
||
|
}
|
||
|
return internal::Apply(fun_, ::std::move(args));
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||
|
}
|
||
|
|
||
|
private:
|
||
|
template <typename G>
|
||
|
friend class Action;
|
||
|
|
||
|
// fun_ is an empty function if and only if this is the DoDefault() action.
|
||
|
::std::function<F> fun_;
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||
|
};
|
||
|
|
||
|
// 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&) {
|
||
|
static_assert(std::is_void<Result>::value, "Result should be void.");
|
||
|
}
|
||
|
};
|
||
|
|
||
|
// 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.
|
||
|
static_assert(std::is_void<Result>::value, "Result type should be void.");
|
||
|
|
||
|
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_
|