1 // Copyright 2013, Google Inc.
2 // All rights reserved.
3 //
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7 //
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17 //
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29
30 // Google Mock - a framework for writing C++ mock classes.
31 //
32 // This file implements some matchers that depend on gmock-matchers.h.
33 //
34 // Note that tests are implemented in gmock-matchers_test.cc rather than
35 // gmock-more-matchers-test.cc.
36
37 // IWYU pragma: private, include "gmock/gmock.h"
38 // IWYU pragma: friend gmock/.*
39
40 #ifndef GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
41 #define GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
42
43 #include <ostream>
44 #include <string>
45
46 #include "gmock/gmock-matchers.h"
47
48 namespace testing {
49
50 // Silence C4100 (unreferenced formal
51 // parameter) for MSVC
52 #ifdef _MSC_VER
53 #pragma warning(push)
54 #pragma warning(disable : 4100)
55 #if (_MSC_VER == 1900)
56 // and silence C4800 (C4800: 'int *const ': forcing value
57 // to bool 'true' or 'false') for MSVC 14
58 #pragma warning(disable : 4800)
59 #endif
60 #endif
61
62 namespace internal {
63
64 // Implements the polymorphic IsEmpty matcher, which
65 // can be used as a Matcher<T> as long as T is either a container that defines
66 // empty() and size() (e.g. std::vector or std::string), or a C-style string.
67 class IsEmptyMatcher {
68 public:
69 // Matches anything that defines empty() and size().
70 template <typename MatcheeContainerType>
MatchAndExplain(const MatcheeContainerType & c,MatchResultListener * listener)71 bool MatchAndExplain(const MatcheeContainerType& c,
72 MatchResultListener* listener) const {
73 if (c.empty()) {
74 return true;
75 }
76 *listener << "whose size is " << c.size();
77 return false;
78 }
79
80 // Matches C-style strings.
MatchAndExplain(const char * s,MatchResultListener * listener)81 bool MatchAndExplain(const char* s, MatchResultListener* listener) const {
82 return MatchAndExplain(std::string(s), listener);
83 }
84
85 // Describes what this matcher matches.
DescribeTo(std::ostream * os)86 void DescribeTo(std::ostream* os) const { *os << "is empty"; }
87
DescribeNegationTo(std::ostream * os)88 void DescribeNegationTo(std::ostream* os) const { *os << "isn't empty"; }
89 };
90
91 } // namespace internal
92
93 // Creates a polymorphic matcher that matches an empty container or C-style
94 // string. The container must support both size() and empty(), which all
95 // STL-like containers provide.
IsEmpty()96 inline PolymorphicMatcher<internal::IsEmptyMatcher> IsEmpty() {
97 return MakePolymorphicMatcher(internal::IsEmptyMatcher());
98 }
99
100 // Define a matcher that matches a value that evaluates in boolean
101 // context to true. Useful for types that define "explicit operator
102 // bool" operators and so can't be compared for equality with true
103 // and false.
104 MATCHER(IsTrue, negation ? "is false" : "is true") {
105 return static_cast<bool>(arg);
106 }
107
108 // Define a matcher that matches a value that evaluates in boolean
109 // context to false. Useful for types that define "explicit operator
110 // bool" operators and so can't be compared for equality with true
111 // and false.
112 MATCHER(IsFalse, negation ? "is true" : "is false") {
113 return !static_cast<bool>(arg);
114 }
115
116 #ifdef _MSC_VER
117 #pragma warning(pop)
118 #endif
119
120 } // namespace testing
121
122 #endif // GOOGLEMOCK_INCLUDE_GMOCK_GMOCK_MORE_MATCHERS_H_
123