llvm/utils/unittest/googlemock/include/gmock/gmock-cardinalities.h

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  29
  30
  31 // Google Mock - a framework for writing C++ mock classes.
  32 //
  33 // This file implements some commonly used cardinalities.  More
  34 // cardinalities can be defined by the user implementing the
  35 // CardinalityInterface interface if necessary.
  36
  37 // GOOGLETEST_CM0002 DO NOT DELETE
  38
  39 // IWYU pragma: private, include "gmock/gmock.h"
  40
  41 #ifndef GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
  42 #define GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
  43
  44 #include <limits.h>
  45 #include <memory>
  46 #include <ostream>  // NOLINT
  47 #include "gmock/internal/gmock-port.h"
  48 #include "gtest/gtest.h"
  49
  50 GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
  51 /* class A needs to have dll-interface to be used by clients of class B */)
  52
  53 namespace testing {
  54
  55 // To implement a cardinality Foo, define:
  56 //   1. a class FooCardinality that implements the
  57 //      CardinalityInterface interface, and
  58 //   2. a factory function that creates a Cardinality object from a
  59 //      const FooCardinality*.
  60 //
  61 // The two-level delegation design follows that of Matcher, providing
  62 // consistency for extension developers.  It also eases ownership
  63 // management as Cardinality objects can now be copied like plain values.
  64
  65 // The implementation of a cardinality.
  66 class CardinalityInterface {
  67  public:
  68   virtual ~CardinalityInterface() {}
  69
  70   // Conservative estimate on the lower/upper bound of the number of
  71   // calls allowed.
  72   virtual int ConservativeLowerBound() const { return 0; }
  73   virtual int ConservativeUpperBound() const { return INT_MAX; }
  74
  75   // Returns true if and only if call_count calls will satisfy this
  76   // cardinality.
  77   virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
  78
  79   // Returns true if and only if call_count calls will saturate this
  80   // cardinality.
  81   virtual bool IsSaturatedByCallCount(int call_count) const = 0;
  82
  83   // Describes self to an ostream.
  84   virtual void DescribeTo(::std::ostream* os) const = 0;
  85 };
  86
  87 // A Cardinality is a copyable and IMMUTABLE (except by assignment)
  88 // object that specifies how many times a mock function is expected to
  89 // be called.  The implementation of Cardinality is just a std::shared_ptr
  90 // to const CardinalityInterface. Don't inherit from Cardinality!
  91 class GTEST_API_ Cardinality {
  92  public:
  93   // Constructs a null cardinality.  Needed for storing Cardinality
  94   // objects in STL containers.
  95   Cardinality() {}
  96
  97   // Constructs a Cardinality from its implementation.
  98   explicit Cardinality(const CardinalityInterface* impl) : impl_(impl) {}
  99
 100   // Conservative estimate on the lower/upper bound of the number of
 101   // calls allowed.
 102   int ConservativeLowerBound() const { return impl_->ConservativeLowerBound(); }
 103   int ConservativeUpperBound() const { return impl_->ConservativeUpperBound(); }
 104
 105   // Returns true if and only if call_count calls will satisfy this
 106   // cardinality.
 107   bool IsSatisfiedByCallCount(int call_count) const {
 108     return impl_->IsSatisfiedByCallCount(call_count);
 109   }
 110
 111   // Returns true if and only if call_count calls will saturate this
 112   // cardinality.
 113   bool IsSaturatedByCallCount(int call_count) const {
 114     return impl_->IsSaturatedByCallCount(call_count);
 115   }
 116
 117   // Returns true if and only if call_count calls will over-saturate this
 118   // cardinality, i.e. exceed the maximum number of allowed calls.
 119   bool IsOverSaturatedByCallCount(int call_count) const {
 120     return impl_->IsSaturatedByCallCount(call_count) &&
 121         !impl_->IsSatisfiedByCallCount(call_count);
 122   }
 123
 124   // Describes self to an ostream
 125   void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
 126
 127   // Describes the given actual call count to an ostream.
 128   static void DescribeActualCallCountTo(int actual_call_count,
 129                                         ::std::ostream* os);
 130
 131  private:
 132   std::shared_ptr<const CardinalityInterface> impl_;
 133 };
 134
 135 // Creates a cardinality that allows at least n calls.
 136 GTEST_API_ Cardinality AtLeast(int n);
 137
 138 // Creates a cardinality that allows at most n calls.
 139 GTEST_API_ Cardinality AtMost(int n);
 140
 141 // Creates a cardinality that allows any number of calls.
 142 GTEST_API_ Cardinality AnyNumber();
 143
 144 // Creates a cardinality that allows between min and max calls.
 145 GTEST_API_ Cardinality Between(int min, int max);
 146
 147 // Creates a cardinality that allows exactly n calls.
 148 GTEST_API_ Cardinality Exactly(int n);
 149
 150 // Creates a cardinality from its implementation.
 151 inline Cardinality MakeCardinality(const CardinalityInterface* c) {
 152   return Cardinality(c);
 153 }
 154
 155 }  // namespace testing
 156
 157 GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
 158
 159 #endif  // GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_