ceph/src/c-ares/test/gmock-1.7.0/include/gmock/gmock-more-actions.h

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  29 //
  30 // Author: wan@google.com (Zhanyong Wan)
  31
  32 // Google Mock - a framework for writing C++ mock classes.
  33 //
  34 // This file implements some actions that depend on gmock-generated-actions.h.
  35
  36 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
  37 #define GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
  38
  39 #include <algorithm>
  40
  41 #include "gmock/gmock-generated-actions.h"
  42
  43 namespace testing {
  44 namespace internal {
  45
  46 // Implements the Invoke(f) action.  The template argument
  47 // FunctionImpl is the implementation type of f, which can be either a
  48 // function pointer or a functor.  Invoke(f) can be used as an
  49 // Action<F> as long as f's type is compatible with F (i.e. f can be
  50 // assigned to a tr1::function<F>).
  51 template <typename FunctionImpl>
  52 class InvokeAction {
  53  public:
  54   // The c'tor makes a copy of function_impl (either a function
  55   // pointer or a functor).
  56   explicit InvokeAction(FunctionImpl function_impl)
  57       : function_impl_(function_impl) {}
  58
  59   template <typename Result, typename ArgumentTuple>
  60   Result Perform(const ArgumentTuple& args) {
  61     return InvokeHelper<Result, ArgumentTuple>::Invoke(function_impl_, args);
  62   }
  63
  64  private:
  65   FunctionImpl function_impl_;
  66
  67   GTEST_DISALLOW_ASSIGN_(InvokeAction);
  68 };
  69
  70 // Implements the Invoke(object_ptr, &Class::Method) action.
  71 template <class Class, typename MethodPtr>
  72 class InvokeMethodAction {
  73  public:
  74   InvokeMethodAction(Class* obj_ptr, MethodPtr method_ptr)
  75       : obj_ptr_(obj_ptr), method_ptr_(method_ptr) {}
  76
  77   template <typename Result, typename ArgumentTuple>
  78   Result Perform(const ArgumentTuple& args) const {
  79     return InvokeHelper<Result, ArgumentTuple>::InvokeMethod(
  80         obj_ptr_, method_ptr_, args);
  81   }
  82
  83  private:
  84   Class* const obj_ptr_;
  85   const MethodPtr method_ptr_;
  86
  87   GTEST_DISALLOW_ASSIGN_(InvokeMethodAction);
  88 };
  89
  90 }  // namespace internal
  91
  92 // Various overloads for Invoke().
  93
  94 // Creates an action that invokes 'function_impl' with the mock
  95 // function's arguments.
  96 template <typename FunctionImpl>
  97 PolymorphicAction<internal::InvokeAction<FunctionImpl> > Invoke(
  98     FunctionImpl function_impl) {
  99   return MakePolymorphicAction(
 100       internal::InvokeAction<FunctionImpl>(function_impl));
 101 }
 102
 103 // Creates an action that invokes the given method on the given object
 104 // with the mock function's arguments.
 105 template <class Class, typename MethodPtr>
 106 PolymorphicAction<internal::InvokeMethodAction<Class, MethodPtr> > Invoke(
 107     Class* obj_ptr, MethodPtr method_ptr) {
 108   return MakePolymorphicAction(
 109       internal::InvokeMethodAction<Class, MethodPtr>(obj_ptr, method_ptr));
 110 }
 111
 112 // WithoutArgs(inner_action) can be used in a mock function with a
 113 // non-empty argument list to perform inner_action, which takes no
 114 // argument.  In other words, it adapts an action accepting no
 115 // argument to one that accepts (and ignores) arguments.
 116 template <typename InnerAction>
 117 inline internal::WithArgsAction<InnerAction>
 118 WithoutArgs(const InnerAction& action) {
 119   return internal::WithArgsAction<InnerAction>(action);
 120 }
 121
 122 // WithArg<k>(an_action) creates an action that passes the k-th
 123 // (0-based) argument of the mock function to an_action and performs
 124 // it.  It adapts an action accepting one argument to one that accepts
 125 // multiple arguments.  For convenience, we also provide
 126 // WithArgs<k>(an_action) (defined below) as a synonym.
 127 template <int k, typename InnerAction>
 128 inline internal::WithArgsAction<InnerAction, k>
 129 WithArg(const InnerAction& action) {
 130   return internal::WithArgsAction<InnerAction, k>(action);
 131 }
 132
 133 // The ACTION*() macros trigger warning C4100 (unreferenced formal
 134 // parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
 135 // the macro definition, as the warnings are generated when the macro
 136 // is expanded and macro expansion cannot contain #pragma.  Therefore
 137 // we suppress them here.
 138 #ifdef _MSC_VER
 139 # pragma warning(push)
 140 # pragma warning(disable:4100)
 141 #endif
 142
 143 // Action ReturnArg<k>() returns the k-th argument of the mock function.
 144 ACTION_TEMPLATE(ReturnArg,
 145                 HAS_1_TEMPLATE_PARAMS(int, k),
 146                 AND_0_VALUE_PARAMS()) {
 147   return std::tr1::get<k>(args);
 148 }
 149
 150 // Action SaveArg<k>(pointer) saves the k-th (0-based) argument of the
 151 // mock function to *pointer.
 152 ACTION_TEMPLATE(SaveArg,
 153                 HAS_1_TEMPLATE_PARAMS(int, k),
 154                 AND_1_VALUE_PARAMS(pointer)) {
 155   *pointer = ::std::tr1::get<k>(args);
 156 }
 157
 158 // Action SaveArgPointee<k>(pointer) saves the value pointed to
 159 // by the k-th (0-based) argument of the mock function to *pointer.
 160 ACTION_TEMPLATE(SaveArgPointee,
 161                 HAS_1_TEMPLATE_PARAMS(int, k),
 162                 AND_1_VALUE_PARAMS(pointer)) {
 163   *pointer = *::std::tr1::get<k>(args);
 164 }
 165
 166 // Action SetArgReferee<k>(value) assigns 'value' to the variable
 167 // referenced by the k-th (0-based) argument of the mock function.
 168 ACTION_TEMPLATE(SetArgReferee,
 169                 HAS_1_TEMPLATE_PARAMS(int, k),
 170                 AND_1_VALUE_PARAMS(value)) {
 171   typedef typename ::std::tr1::tuple_element<k, args_type>::type argk_type;
 172   // Ensures that argument #k is a reference.  If you get a compiler
 173   // error on the next line, you are using SetArgReferee<k>(value) in
 174   // a mock function whose k-th (0-based) argument is not a reference.
 175   GTEST_COMPILE_ASSERT_(internal::is_reference<argk_type>::value,
 176                         SetArgReferee_must_be_used_with_a_reference_argument);
 177   ::std::tr1::get<k>(args) = value;
 178 }
 179
 180 // Action SetArrayArgument<k>(first, last) copies the elements in
 181 // source range [first, last) to the array pointed to by the k-th
 182 // (0-based) argument, which can be either a pointer or an
 183 // iterator. The action does not take ownership of the elements in the
 184 // source range.
 185 ACTION_TEMPLATE(SetArrayArgument,
 186                 HAS_1_TEMPLATE_PARAMS(int, k),
 187                 AND_2_VALUE_PARAMS(first, last)) {
 188   // Microsoft compiler deprecates ::std::copy, so we want to suppress warning
 189   // 4996 (Function call with parameters that may be unsafe) there.
 190 #ifdef _MSC_VER
 191 # pragma warning(push)          // Saves the current warning state.
 192 # pragma warning(disable:4996)  // Temporarily disables warning 4996.
 193 #endif
 194   ::std::copy(first, last, ::std::tr1::get<k>(args));
 195 #ifdef _MSC_VER
 196 # pragma warning(pop)           // Restores the warning state.
 197 #endif
 198 }
 199
 200 // Action DeleteArg<k>() deletes the k-th (0-based) argument of the mock
 201 // function.
 202 ACTION_TEMPLATE(DeleteArg,
 203                 HAS_1_TEMPLATE_PARAMS(int, k),
 204                 AND_0_VALUE_PARAMS()) {
 205   delete ::std::tr1::get<k>(args);
 206 }
 207
 208 // This action returns the value pointed to by 'pointer'.
 209 ACTION_P(ReturnPointee, pointer) { return *pointer; }
 210
 211 // Action Throw(exception) can be used in a mock function of any type
 212 // to throw the given exception.  Any copyable value can be thrown.
 213 #if GTEST_HAS_EXCEPTIONS
 214
 215 // Suppresses the 'unreachable code' warning that VC generates in opt modes.
 216 # ifdef _MSC_VER
 217 #  pragma warning(push)          // Saves the current warning state.
 218 #  pragma warning(disable:4702)  // Temporarily disables warning 4702.
 219 # endif
 220 ACTION_P(Throw, exception) { throw exception; }
 221 # ifdef _MSC_VER
 222 #  pragma warning(pop)           // Restores the warning state.
 223 # endif
 224
 225 #endif  // GTEST_HAS_EXCEPTIONS
 226
 227 #ifdef _MSC_VER
 228 # pragma warning(pop)
 229 #endif
 230
 231 }  // namespace testing
 232
 233 #endif  // GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_