src/testutils/testutils_doc.h

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  35 /*! \internal \file
  36  * \brief
  37  * Dummy header for \ref module_testutils documentation.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \ingroup module_testutils
  41  */
  42 /*! \libinternal \defgroup module_testutils Testing Utilities (testutils)
  43  * \brief
  44  * Common helper classes and functions for writing tests using Google Test.
  45  *
  46  * General documentation for the testing in \Gromacs can be found in the
  47  * \linktodevmanual{index,developer guide}.  This page provides an overview of
  48  * the actual API provided by the `testutils` module.
  49  *
  50  * There are several distinct functionalities provided:
  51  *  - gmx::test::TestFileManager (in testfilemanager.h) provides functionality
  52  *    for locating test input files from the source directory and managing
  53  *    temporary files that need to be created during the test.
  54  *  - gmx::test::TestFileInputRedirector (in testfileredirector.h) provides
  55  *    functionality for capturing file existence checks in code that uses
  56  *    gmx::IFileInputRedirector.
  57  *  - gmx::test::TestFileOutputRedirector (in testfileredirector.h) provides
  58  *    functionality for capturing file output (including `stdout`) from code
  59  *    that uses gmx::IFileOutputRedirector, and checking that output
  60  *    against reference data.
  61  *  - gmx::test::InteractiveTestHelper (in interactivetest.h) provides
  62  *    a helper class for testing an interactive session that uses
  63  *    gmx::TextInputStream and gmx::TextOutputStream for prompting input and
  64  *    printing status messages.
  65  *  - #GMX_TEST_OPTIONS macro provides facilities for adding custom command
  66  *    line options for the test binary.
  67  *  - testasserts.h provides several custom test assertions for better
  68  *    exception and floating-point handling than built-in Google Test
  69  *    assertions.
  70  *  - gmx::test::TestReferenceData and related classes (in refdata.h) provide
  71  *    utilities to write regression-style tests that check that the test
  72  *    produces the same results as an earlier run of the same test.
  73  *    See \ref page_refdata for more details.
  74  *  - gmx::test::CommandLine and related classes (in cmdlinetest.h) provide
  75  *    utilities for constructing command line argument arrays for use in tests
  76  *    that invoke actual commands.  The same header also provides
  77  *    gmx::test::CommandLineTestHelper and gmx::test::CommandLineTestBase
  78  *    for easily creating tests that execute essentially full command-line
  79  *    programs, including checking the output files produced.
  80  *  - gmx::test::StringTestBase provides a test fixture for tests that need to
  81  *    test long strings for correctness.
  82  *  - gmx::test::StdioTestHelper provides a helper class for tests that need to
  83  *    execute legacy code where `stdin` reading cannot be easily mocked.
  84  *
  85  * Additionally, testinit.h and mpi_printer.h, and their corresponding source
  86  * files, provide functionality that is not visible on the API level: they
  87  * provide initialization routines for the above functionality, which are
  88  * automatically called by the %main() function provided in unittest_main.cpp.
  89  *
  90  * mpi_printer.h provides a Google Test listener that is installed when the
  91  * tests are compiled with MPI.  This listener allows the test binary to be run
  92  * on multiple MPI ranks, and synchronizes the execution and output from the
  93  * test cases, as well as makes the test fail on even if an assertion fails
  94  * only on one rank.
  95  *
  96  * \ingroup group_utilitymodules
  97  */