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