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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 cardinalities.
35
36 #include "gmock/gmock-cardinalities.h"
37
38 #include <limits.h>
39 #include <ostream> // NOLINT
40 #include <sstream>
41 #include <string>
42 #include "gmock/internal/gmock-internal-utils.h"
43 #include "gtest/gtest.h"
44
45 namespace testing {
46
47 namespace {
48
49 // Implements the Between(m, n) cardinality.
50 class BetweenCardinalityImpl : public CardinalityInterface {
51 public:
BetweenCardinalityImpl(int min,int max)52 BetweenCardinalityImpl(int min, int max)
53 : min_(min >= 0 ? min : 0),
54 max_(max >= min_ ? max : min_) {
55 std::stringstream ss;
56 if (min < 0) {
57 ss << "The invocation lower bound must be >= 0, "
58 << "but is actually " << min << ".";
59 internal::Expect(false, __FILE__, __LINE__, ss.str());
60 } else if (max < 0) {
61 ss << "The invocation upper bound must be >= 0, "
62 << "but is actually " << max << ".";
63 internal::Expect(false, __FILE__, __LINE__, ss.str());
64 } else if (min > max) {
65 ss << "The invocation upper bound (" << max
66 << ") must be >= the invocation lower bound (" << min
67 << ").";
68 internal::Expect(false, __FILE__, __LINE__, ss.str());
69 }
70 }
71
72 // Conservative estimate on the lower/upper bound of the number of
73 // calls allowed.
ConservativeLowerBound() const74 virtual int ConservativeLowerBound() const { return min_; }
ConservativeUpperBound() const75 virtual int ConservativeUpperBound() const { return max_; }
76
IsSatisfiedByCallCount(int call_count) const77 virtual bool IsSatisfiedByCallCount(int call_count) const {
78 return min_ <= call_count && call_count <= max_ ;
79 }
80
IsSaturatedByCallCount(int call_count) const81 virtual bool IsSaturatedByCallCount(int call_count) const {
82 return call_count >= max_;
83 }
84
85 virtual void DescribeTo(::std::ostream* os) const;
86 private:
87 const int min_;
88 const int max_;
89
90 GTEST_DISALLOW_COPY_AND_ASSIGN_(BetweenCardinalityImpl);
91 };
92
93 // Formats "n times" in a human-friendly way.
FormatTimes(int n)94 inline internal::string FormatTimes(int n) {
95 if (n == 1) {
96 return "once";
97 } else if (n == 2) {
98 return "twice";
99 } else {
100 std::stringstream ss;
101 ss << n << " times";
102 return ss.str();
103 }
104 }
105
106 // Describes the Between(m, n) cardinality in human-friendly text.
DescribeTo(::std::ostream * os) const107 void BetweenCardinalityImpl::DescribeTo(::std::ostream* os) const {
108 if (min_ == 0) {
109 if (max_ == 0) {
110 *os << "never called";
111 } else if (max_ == INT_MAX) {
112 *os << "called any number of times";
113 } else {
114 *os << "called at most " << FormatTimes(max_);
115 }
116 } else if (min_ == max_) {
117 *os << "called " << FormatTimes(min_);
118 } else if (max_ == INT_MAX) {
119 *os << "called at least " << FormatTimes(min_);
120 } else {
121 // 0 < min_ < max_ < INT_MAX
122 *os << "called between " << min_ << " and " << max_ << " times";
123 }
124 }
125
126 } // Unnamed namespace
127
128 // Describes the given call count to an ostream.
DescribeActualCallCountTo(int actual_call_count,::std::ostream * os)129 void Cardinality::DescribeActualCallCountTo(int actual_call_count,
130 ::std::ostream* os) {
131 if (actual_call_count > 0) {
132 *os << "called " << FormatTimes(actual_call_count);
133 } else {
134 *os << "never called";
135 }
136 }
137
138 // Creates a cardinality that allows at least n calls.
AtLeast(int n)139 Cardinality AtLeast(int n) { return Between(n, INT_MAX); }
140
141 // Creates a cardinality that allows at most n calls.
AtMost(int n)142 Cardinality AtMost(int n) { return Between(0, n); }
143
144 // Creates a cardinality that allows any number of calls.
AnyNumber()145 Cardinality AnyNumber() { return AtLeast(0); }
146
147 // Creates a cardinality that allows between min and max calls.
Between(int min,int max)148 Cardinality Between(int min, int max) {
149 return Cardinality(new BetweenCardinalityImpl(min, max));
150 }
151
152 // Creates a cardinality that allows exactly n calls.
Exactly(int n)153 Cardinality Exactly(int n) { return Between(n, n); }
154
155 } // namespace testing
156