src/testutils/testfilemanager.h

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  35 /*! \libinternal \file
  36  * \brief
  37  * Declares gmx::test::TestFileManager.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \inlibraryapi
  41  * \ingroup module_testutils
  42  */
  43 #ifndef GMX_TESTUTILS_TESTFILEMANAGER_H
  44 #define GMX_TESTUTILS_TESTFILEMANAGER_H
  45
  46 #include <string>
  47
  48 #include "gromacs/utility/classhelpers.h"
  49
  50 namespace gmx
  51 {
  52 /*! \libinternal \brief
  53  * Testing utilities namespace.
  54  *
  55  * This namespace contains utilities for writing unit tests, mostly from the
  56  * \ref module_testutils module.
  57  */
  58 namespace test
  59 {
  60
  61 /*! \libinternal \brief
  62  * Helper for tests that need input and output files.
  63  *
  64  * To be used as a member in a test fixture class, this class provides
  65  * getTemporaryFilePath() method that returns a path for creating file names
  66  * for temporary files.  The returned path contains the name of the running
  67  * test, making it unique across tests.  Additionally, this class takes care of
  68  * removing any temporary files (i.e., all paths returned by
  69  * getTemporaryFilePath()) at test teardown (i.e., when the
  70  * TestFileManager is destructed).
  71  *
  72  * In addition, class-level static accessors provide means to
  73  * access data files that are located in the test source directory.
  74  * This is used to provide input files for the tests, and also to
  75  * store test reference data persistently (see TestReferenceData).
  76  *
  77  * Note that setInputDataDirectory() and
  78  * setGlobalOutputTempDirectory() must be called in setup code, before
  79  * creating any objects of this class that are used for accessing the
  80  * paths for these respective directories. Code in tests should avoid
  81  * calling setGlobalOutputTempDirectory(), and instead instantiate an
  82  * object and use setOutputTempDirectory(), so that the global state
  83  * is not changed.
  84  *
  85  * \inlibraryapi
  86  * \ingroup module_testutils
  87  */
  88 class TestFileManager
  89 {
  90     public:
  91         /*! \brief Constructor */
  92         TestFileManager();
  93         /*! \brief Frees internal storage and deletes any accessed
  94          * file paths
  95          *
  96          * Any errors (e.g., missing files) encountered while deleting the
  97          * files are ignored.
  98          */
  99         ~TestFileManager();
 100
 101         /*! \brief
 102          * Creates a name for a temporary file within a single unit test.
 103          *
 104          * \param[in] suffix  Suffix to add to the file name (should contain an
 105          *      extension if one is desired).
 106          * \returns   Temporary file name that includes the test name and
 107          *      \p suffix.
 108          *
 109          * This method should only be called from within a Google Test test.
 110          * Two calls with the same \p suffix return the same string within the
 111          * same test.
 112          */
 113         std::string getTemporaryFilePath(const char *suffix);
 114         //! \copydoc TestFileManager::getTemporaryFilePath(const char *)
 115         std::string getTemporaryFilePath(const std::string &suffix);
 116
 117         /*! \brief Returns the path to the output temporary directory
 118          * for tests which use this TestFileManager object.
 119          *
 120          * \returns Path to output temporary directory
 121          */
 122         const char *getOutputTempDirectory() const;
 123
 124         /*! \brief Sets the output temporary directory for tests which
 125          * use this TestFileManager object.
 126          *
 127          * \param[in] path  Path at which test should write temporary files
 128          *
 129          * \p path must name an existing directory. An internal copy
 130          * of path is made. The caller is responsible for holding a
 131          * valid mutex on the object before calling this member
 132          * function.
 133          */
 134         void setOutputTempDirectory(const std::string &path);
 135
 136         // static functions follow
 137
 138         /*! \brief
 139          * Creates a file name root for use within a single unit test.
 140          *
 141          * This method should only be called from within a Google Test
 142          * test. Uses the Google Test test fixture and test case name
 143          * to construct a string that is unique over all
 144          * tests. Intended to produce distinct names for files that
 145          * may be stored in the same directory for multiple tests.
 146          */
 147         static std::string getTestSpecificFileNameRoot();
 148
 149         /*! \brief
 150          * Creates a file name for use within a single unit test.
 151          *
 152          * \param[in] suffix  Suffix to add to the file name (should contain an
 153          *      extension if one is desired).
 154          * \returns   File name that includes the test name and
 155          *      \p suffix.
 156          *
 157          * This method should only be called from within a Google Test test.
 158          * Two calls with the same \p suffix return the same string within the
 159          * same test.
 160          * Intended to produce distinct names for files that may be stored in
 161          * the same directory for multiple tests.
 162          */
 163         static std::string getTestSpecificFileName(const char *suffix);
 164
 165         /*! \brief
 166          * Returns the path to a test input file.
 167          *
 168          * \param[in] filename  Relative path/filename to a test input file.
 169          * \returns Path to \p filename under the test input data directory.
 170          */
 171         static std::string getInputFilePath(const char *filename);
 172
 173         /*! \brief
 174          * Returns the path to the test input directory.
 175          *
 176          * \returns Path to input data directory for the test executable.
 177          */
 178         static const char *getInputDataDirectory();
 179
 180         /*! \brief
 181          * Sets the test input directory.
 182          *
 183          * \param[in] path  Path from which test input data is looked up from.
 184          *
 185          * \p path must name an existing directory.
 186          *
 187          * This function is automatically called by unittest_main.cpp through
 188          * initTestUtils().
 189          */
 190         static void setInputDataDirectory(const std::string &path);
 191
 192         /*! \brief Returns the path to the global test output
 193          * temporary directory for future TestFileManager objects.
 194          *
 195          * \returns Path to default output temporary directory for the test executable.
 196          */
 197         static const char *getGlobalOutputTempDirectory();
 198
 199         /*! \brief Sets the default global test output temporary
 200          * directory for future TestFileManager objects.
 201          *
 202          * \param[in] path  Path at which tests should write temporary files
 203          *
 204          * \p path must name an existing directory.
 205          *
 206          * This function is automatically called by unittest_main.cpp
 207          * through initTestUtils(). Test fixtures should call
 208          * setOutputTempDirectory(), rather than change the global
 209          * state.
 210          */
 211         static void setGlobalOutputTempDirectory(const char *path);
 212
 213     private:
 214         class Impl;
 215
 216         PrivateImplPointer<Impl> impl_;
 217 };
 218
 219 } // namespace test
 220 } // namespace gmx
 221
 222 #endif