src/testutils/testoptions.h

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  35 /*! \libinternal \file
  36  * \brief
  37  * Functions for accessing test command-line options.
  38  *
  39  * Functions in this header allow accessing command-line options passed to the
  40  * test executable from tests.  This can be used to, e.g., enable additional
  41  * output for debugging purposes.
  42  *
  43  * \author Teemu Murtola <teemu.murtola@gmail.com>
  44  * \inlibraryapi
  45  * \ingroup module_testutils
  46  */
  47 #ifndef GMX_TESTUTILS_TESTOPTIONS_H
  48 #define GMX_TESTUTILS_TESTOPTIONS_H
  49
  50 namespace gmx
  51 {
  52
  53 class Options;
  54
  55 namespace test
  56 {
  57
  58 /*! \libinternal \brief
  59  * Provides additional options for the test executable.
  60  *
  61  * Typically not used directly in test code, but through the
  62  * #GMX_TEST_OPTIONS macro.
  63  *
  64  * \inlibraryapi
  65  * \ingroup module_testutils
  66  */
  67 class TestOptionsProvider
  68 {
  69     public:
  70         /*! \brief
  71          * Initializes the options from this provider.
  72          *
  73          * \param   options  The options need to be added here.
  74          */
  75         virtual void initOptions(Options *options) = 0;
  76
  77     protected:
  78         virtual ~TestOptionsProvider() {}
  79 };
  80
  81 /*! \libinternal \brief
  82  * Registers a test option provider with the test framework.
  83  *
  84  * \param[in] name     Name of the options provider (for ordering).
  85  * \param[in] provider The provider to register.
  86  * \throws  std::bad_alloc     if out of memory.
  87  * \throws  tMPI::system_error on mutex failures.
  88  *
  89  * Typically not used directly in test code, but through the
  90  * #GMX_TEST_OPTIONS macro.
  91  *
  92  * This gets called from constructors for global variables, so ideally
  93  * it would not throw to avoid unhandled exceptions.  But since this
  94  * is only test code, it is not worth the effort to try to remove those
  95  * rare exceptions (mutex failures and out-of-memory from STL).
  96  *
  97  * \ingroup module_testutils
  98  */
  99 void registerTestOptions(const char *name, TestOptionsProvider *provider);
 100
 101 // Uncrustify screws up the indentation for the example otherwise.
 102 /* *INDENT-OFF* */
 103 /*! \libinternal \brief
 104  * Macro to add additional command-line options for the test binary.
 105  *
 106  * \param  name    Unique name for the set of options.
 107  * \param  options Placeholder name for an gmx::Options object for adding options.
 108  *
 109  * The macro should be followed by a block that adds the desired command-line
 110  * options to `options` using gmx::Options::addOption().  \ref module_options
 111  * provides an overview of the options machinery.
 112  *
 113  * `name` must be unique within the executable to which the options are added.
 114  * If the macro is within an unnamed namespace, then it is sufficient that it
 115  * is unique within the file.
 116  *
 117  * Typical usage:
 118  * \code
 119    #include "gromacs/options/basicoptions.h"
 120    #include "gromacs/options/options.h"
 121    #include "testutils/testoptions.h"
 122
 123    namespace gmx
 124    {
 125    namespace
 126    {
 127
 128    bool g_optionValue = false;
 129
 130    //! \cond
 131    GMX_TEST_OPTIONS(MyTestOptions, options)
 132    {
 133        options->addOption(BooleanOption("flag").store(&g_optionValue)
 134                               .description("My description"));
 135    }
 136    //! \endcond
 137
 138    } // namespace
 139    } // namespace gmx
 140    \endcode
 141  *
 142  * \c \\cond and \c \\endcond statements are necessary around the macro to avoid
 143  * Doxygen warnings.
 144  *
 145  * One macro invocation per an added option, with more of the implementation
 146  * details hidden inside the macro, could be nicer.  But that requires more
 147  * elaborate macro machinery, so it is probably not worth the effort and
 148  * complexity.
 149  *
 150  * \ingroup module_testutils
 151  * \hideinitializer
 152  */
 153 /* *INDENT-ON* */
 154 #define GMX_TEST_OPTIONS(name, options) \
 155     class name : public ::gmx::test::TestOptionsProvider \
 156     { \
 157         public: \
 158             name() \
 159             { \
 160                 ::gmx::test::registerTestOptions(#name, this); \
 161             } \
 162             virtual void initOptions(::gmx::Options *options); \
 163     }; \
 164     \
 165     static name s_ ## name ## Instance; \
 166     \
 167     void name::initOptions(::gmx::Options *options)
 168
 169 /*! \libinternal \brief
 170  * Initializes the test utilities library.
 171  *
 172  * Does not throw.  Terminates the program with a non-zero error code if an
 173  * error occurs.
 174  *
 175  * This function is automatically called by unittest_main.cpp.
 176  */
 177 void initTestUtils(const char *dataPath, const char *tempPath, int *argc, char ***argv);
 178
 179 /*! \libinternal \brief
 180  * Finalizes the test utilities library.
 181  *
 182  * Does not throw.  Terminates the program with a non-zero error code if an
 183  * error occurs.
 184  *
 185  * This function is automatically called by unittest_main.cpp.
 186  */
 187 void finalizeTestUtils();
 188
 189 } // namespace test
 190 } // namespace gmx
 191
 192 #endif