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37 * \brief Implements floating-point matchers from testmatchers.h for
38 * use with Google Mock.
40 * \author Mark Abraham <mark.j.abraham@gmail.com>
41 * \ingroup module_testutils
45 #include "testutils/testmatchers.h"
49 #include <gmock/gmock.h>
51 #include "gromacs/math/vectypes.h"
53 #include "testutils/testasserts.h"
60 /*! \brief Implementation class for RealEq matcher.
64 * The implementation is templated so that we can support all of real,
65 * float and double in the same build without duplication.
67 template<typename FloatType>
68 class FloatTypeMatcher : public testing::MatcherInterface<std::tuple<FloatType, FloatType>>
72 FloatTypeMatcher(const FloatingPointTolerance& tolerance) : tolerance_(tolerance) {}
73 //! Compare the two elements of \c arg, return whether they are equal, and comment on \c listener when they are not.
74 bool MatchAndExplain(std::tuple<FloatType, FloatType> arg, testing::MatchResultListener* listener) const override
76 const FloatType& value1 = std::get<0>(arg);
77 const FloatType& value2 = std::get<1>(arg);
78 FloatingPointDifference diff(value1, value2);
79 if (tolerance_.isWithin(diff))
83 *listener->stream() << " Actual value: " << value2 << std::endl
84 << "Expected value: " << value1 << std::endl
85 << " Difference: " << diff.toString() << std::endl
86 << " Tolerance: " << tolerance_.toString(diff);
89 //! Describe to a human what matching means.
90 void DescribeTo(::std::ostream* os) const override { *os << "matches within tolerance"; }
91 //! Describe to a human what failing to match means.
92 void DescribeNegationTo(::std::ostream* os) const override
94 *os << "does not match within tolerance";
98 //! Tolerance used in matching
99 FloatingPointTolerance tolerance_;
102 testing::Matcher<std::tuple<float, float>> FloatEq(const FloatingPointTolerance& tolerance)
104 return testing::MakeMatcher(new FloatTypeMatcher<float>(tolerance));
107 testing::Matcher<std::tuple<double, double>> DoubleEq(const FloatingPointTolerance& tolerance)
109 return testing::MakeMatcher(new FloatTypeMatcher<double>(tolerance));
112 testing::Matcher<std::tuple<real, real>> RealEq(const FloatingPointTolerance& tolerance)
114 return testing::MakeMatcher(new FloatTypeMatcher<real>(tolerance));
117 /*! \brief Implementation class for RvecEq matcher
121 template<typename FloatType>
123 public testing::MatcherInterface<std::tuple<BasicVector<FloatType>, BasicVector<FloatType>>>
127 using VectorType = BasicVector<FloatType>;
129 RVecMatcher(const FloatingPointTolerance& tolerance) : tolerance_(tolerance) {}
130 //! Compare the two elements of \c arg, return whether they are equal, and comment on \c listener when they are not.
131 bool MatchAndExplain(std::tuple<VectorType, VectorType> arg,
132 testing::MatchResultListener* listener) const override
134 const VectorType& lhs = std::get<0>(arg);
135 const VectorType& rhs = std::get<1>(arg);
136 FloatTypeMatcher<FloatType> floatTypeMatcher(tolerance_);
138 for (int d = 0; d < DIM; ++d)
140 auto floatTuple = std::make_tuple<FloatType, FloatType>(lhs[d], rhs[d]);
141 matches = matches && floatTypeMatcher.MatchAndExplain(floatTuple, listener);
145 //! Describe to a human what matching means.
146 void DescribeTo(::std::ostream* os) const override
148 *os << "matches all elements within tolerance";
150 //! Describe to a human what failing to match means.
151 void DescribeNegationTo(::std::ostream* os) const override
153 *os << "does not match all elements within tolerance";
157 //! Tolerance used in matching
158 FloatingPointTolerance tolerance_;
161 // Currently there's no need for explicit float or double flavours of
162 // RVec comparison, but those would be simple to add later.
163 testing::Matcher<std::tuple<RVec, RVec>> RVecEq(const FloatingPointTolerance& tolerance)
165 return testing::MakeMatcher(new RVecMatcher<real>(tolerance));