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, TestReferenceChecker* checker) = 0;
  95 };
  96
  97 //! Smart pointer for managing a ITextBlockMatcher.
  98 typedef std::unique_ptr<ITextBlockMatcher> TextBlockMatcherPointer;
  99
 100 /*! \libinternal \brief
 101  * Represents a factory for creating a text matcher.
 102  *
 103  * See derived classes for available matchers.  Each derived class represents
 104  * one type of matcher (see ITextBlockMatcher), and provides any methods
 105  * necessary to pass parameters to such a matcher.  Methods that accept a
 106  * matcher can then take in this interface, and call createMatcher() to use the
 107  * matcher that the caller of the method specifies.
 108  *
 109  * \inlibraryapi
 110  * \ingroup module_testutils
 111  */
 112 class ITextBlockMatcherSettings
 113 {
 114 public:
 115     //! Factory method that constructs the matcher after parameters are set.
 116     virtual TextBlockMatcherPointer createMatcher() const = 0;
 117
 118 protected:
 119     virtual ~ITextBlockMatcherSettings();
 120 };
 121
 122 /*! \libinternal \brief
 123  * Use an exact text match (the contents should be exactly equal).
 124  *
 125  * \inlibraryapi
 126  * \ingroup module_testutils
 127  */
 128 class ExactTextMatch : public ITextBlockMatcherSettings
 129 {
 130 public:
 131     TextBlockMatcherPointer createMatcher() const override;
 132 };
 133
 134 /*! \libinternal \brief
 135  * Do not match the text (the contents are ignored).
 136  *
 137  * \inlibraryapi
 138  * \ingroup module_testutils
 139  */
 140 class NoTextMatch : public ITextBlockMatcherSettings
 141 {
 142 public:
 143     TextBlockMatcherPointer createMatcher() const override;
 144 };
 145
 146 /*! \libinternal \brief
 147  * Use an exact text match after scrubbing lines of the text
 148  * that match the supplied regular expressions.
 149  *
 150  * This suits comparing files in tests that are intended to be
 151  * localized by reporting usage, time, date, user, or file-system
 152  * stamps. The latter won't be reproducible in tests until
 153  * the tools that emit them can be mocked suitably.
 154  *
 155  * \inlibraryapi
 156  * \ingroup module_testutils
 157  */
 158 class FilteringExactTextMatch : public ITextBlockMatcherSettings
 159 {
 160 public:
 161     //! Constructor
 162     explicit FilteringExactTextMatch(std::vector<std::string> linesToSkip);
 163     //! Factory method.
 164     TextBlockMatcherPointer createMatcher() const override;
 165     //! Add a regular expression for which a matching line should be skipped.
 166     void addRegexToSkip(const std::string& lineToSkip);
 167
 168 private:
 169     //! The regular expressions for lines that should be skipped.
 170     std::vector<std::string> linesToSkip_;
 171 };
 172
 173 } // namespace test
 174 } // namespace gmx
 175
 176 #endif