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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 <memory>
44#include <ostream> // NOLINT
45#include "gmock/internal/gmock-port.h"
46#include "gtest/gtest.h"
47
48GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
49/* class A needs to have dll-interface to be used by clients of class B */)
50
51namespace testing {
52
53// To implement a cardinality Foo, define:
54// 1. a class FooCardinality that implements the
55// CardinalityInterface interface, and
56// 2. a factory function that creates a Cardinality object from a
57// const FooCardinality*.
58//
59// The two-level delegation design follows that of Matcher, providing
60// consistency for extension developers. It also eases ownership
61// management as Cardinality objects can now be copied like plain values.
62
63// The implementation of a cardinality.
64class CardinalityInterface {
65 public:
66 virtual ~CardinalityInterface() {}
67
68 // Conservative estimate on the lower/upper bound of the number of
69 // calls allowed.
70 virtual int ConservativeLowerBound() const { return 0; }
71 virtual int ConservativeUpperBound() const { return INT_MAX; }
72
73 // Returns true if call_count calls will satisfy this cardinality.
74 virtual bool IsSatisfiedByCallCount(int call_count) const = 0;
75
76 // Returns true if call_count calls will saturate this cardinality.
77 virtual bool IsSaturatedByCallCount(int call_count) const = 0;
78
79 // Describes self to an ostream.
80 virtual void DescribeTo(::std::ostream* os) const = 0;
81};
82
83// A Cardinality is a copyable and IMMUTABLE (except by assignment)
84// object that specifies how many times a mock function is expected to
85// be called. The implementation of Cardinality is just a std::shared_ptr
86// to const CardinalityInterface. Don't inherit from Cardinality!
87class 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 if 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 if 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 if 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 std::shared_ptr<const CardinalityInterface> impl_;
127};
128
129// Creates a cardinality that allows at least n calls.
130GTEST_API_ Cardinality AtLeast(int n);
131
132// Creates a cardinality that allows at most n calls.
133GTEST_API_ Cardinality AtMost(int n);
134
135// Creates a cardinality that allows any number of calls.
136GTEST_API_ Cardinality AnyNumber();
137
138// Creates a cardinality that allows between min and max calls.
139GTEST_API_ Cardinality Between(int min, int max);
140
141// Creates a cardinality that allows exactly n calls.
142GTEST_API_ Cardinality Exactly(int n);
143
144// Creates a cardinality from its implementation.
145inline Cardinality MakeCardinality(const CardinalityInterface* c) {
146 return Cardinality(c);
147}
148
149} // namespace testing
150
151GTEST_DISABLE_MSC_WARNINGS_POP_() // 4251
152
153#endif // GMOCK_INCLUDE_GMOCK_GMOCK_CARDINALITIES_H_
154