src/testutils/textblockmatchers.h

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  35 /*! \libinternal \file
  36  * \brief
  37  * Declares utility classes for testing multi-line strings against reference data.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \inlibraryapi
  41  * \ingroup module_testutils
  42  */
  43 #ifndef GMX_TESTUTILS_TEXTBLOCKMATCHERS_H
  44 #define GMX_TESTUTILS_TEXTBLOCKMATCHERS_H
  45
  46 #include <memory>
  47 #include <string>
  48 #include <vector>
  49
  50 namespace gmx
  51 {
  52
  53 class TextInputStream;
  54
  55 namespace test
  56 {
  57
  58 class TestReferenceChecker;
  59
  60 /*! \libinternal \brief
  61  * Represents a text matcher, matching text stream contents against reference
  62  * data.
  63  *
  64  * Typical pattern of declaring such matchers is to
  65  *  - Create a factory that implements ITextBlockMatcherSettings,
  66  *  - Make that factory provide any necessary parameters that the matcher needs,
  67  *    using a "named parameter" idiom (see XvgMatch for an example), and
  68  *  - Make the factory create and return an instance of an internal
  69  *    implementation class that implements ITextBlockMatcher and provides
  70  *    the actual matching logic.
  71  *
  72  * Any method that then wants to accept a matcher can accept a
  73  * ITextBlockMatcherSettings.
  74  *
  75  * \inlibraryapi
  76  * \ingroup module_testutils
  77  */
  78 class ITextBlockMatcher
  79 {
  80     public:
  81         virtual ~ITextBlockMatcher();
  82
  83         /*! \brief
  84          * Matches contents of a stream against reference data.
  85          *
  86          * \param  stream   Stream to match.
  87          * \param  checker  Checker to use for matching.
  88          *
  89          * The method can change the state of the provided checker (e.g., by
  90          * changing the default tolerance).
  91          * The caller is responsible of providing a checker where such state
  92          * changes do not matter.
  93          */
  94         virtual void checkStream(TextInputStream      *stream,
  95                                  TestReferenceChecker *checker) = 0;
  96 };
  97
  98 //! Smart pointer for managing a ITextBlockMatcher.
  99 typedef std::unique_ptr<ITextBlockMatcher> TextBlockMatcherPointer;
 100
 101 /*! \libinternal \brief
 102  * Represents a factory for creating a text matcher.
 103  *
 104  * See derived classes for available matchers.  Each derived class represents
 105  * one type of matcher (see ITextBlockMatcher), and provides any methods
 106  * necessary to pass parameters to such a matcher.  Methods that accept a
 107  * matcher can then take in this interface, and call createMatcher() to use the
 108  * matcher that the caller of the method specifies.
 109  *
 110  * \inlibraryapi
 111  * \ingroup module_testutils
 112  */
 113 class ITextBlockMatcherSettings
 114 {
 115     public:
 116         //! Factory method that constructs the matcher after parameters are set.
 117         virtual TextBlockMatcherPointer createMatcher() const = 0;
 118
 119     protected:
 120         virtual ~ITextBlockMatcherSettings();
 121 };
 122
 123 /*! \libinternal \brief
 124  * Use an exact text match (the contents should be exactly equal).
 125  *
 126  * \inlibraryapi
 127  * \ingroup module_testutils
 128  */
 129 class ExactTextMatch : public ITextBlockMatcherSettings
 130 {
 131     public:
 132         TextBlockMatcherPointer createMatcher() const override;
 133 };
 134
 135 /*! \libinternal \brief
 136  * Do not match the text (the contents are ignored).
 137  *
 138  * \inlibraryapi
 139  * \ingroup module_testutils
 140  */
 141 class NoTextMatch : public ITextBlockMatcherSettings
 142 {
 143     public:
 144         TextBlockMatcherPointer createMatcher() const override;
 145 };
 146
 147 /*! \libinternal \brief
 148  * Use an exact text match after scrubbing lines of the text
 149  * that match the supplied regular expressions.
 150  *
 151  * This suits comparing files in tests that are intended to be
 152  * localized by reporting usage, time, date, user, or file-system
 153  * stamps. The latter won't be reproducible in tests until
 154  * the tools that emit them can be mocked suitably.
 155  *
 156  * \inlibraryapi
 157  * \ingroup module_testutils
 158  */
 159 class FilteringExactTextMatch : public ITextBlockMatcherSettings
 160 {
 161     public:
 162         //! Factory method.
 163         TextBlockMatcherPointer createMatcher() const override;
 164         //! Add a regular expression for which a matching line should be skipped.
 165         void addRegexToSkip(const std::string &lineToSkip);
 166     private:
 167         //! The regular expressions for lines that should be skipped.
 168         std::vector<std::string> linesToSkip_;
 169
 170 };
 171
 172 } // namespace test
 173 } // namespace gmx
 174
 175 #endif