diff options
Diffstat (limited to 'Lib/test/support.py')
| -rw-r--r-- | Lib/test/support.py | 52 |
1 files changed, 33 insertions, 19 deletions
diff --git a/Lib/test/support.py b/Lib/test/support.py index 1308914..bf49bab 100644 --- a/Lib/test/support.py +++ b/Lib/test/support.py @@ -21,8 +21,8 @@ __all__ = ["Error", "TestFailed", "ResourceDenied", "import_module", "verbose", "use_resources", "max_memuse", "record_original_stdout", "get_original_stdout", "unload", "unlink", "rmtree", "forget", "is_resource_enabled", "requires", "find_unused_port", "bind_port", - "fcmp", "is_jython", "TESTFN", "HOST", "FUZZ", "findfile", - "sortdict", "check_syntax_error", "open_urlresource", + "fcmp", "is_jython", "TESTFN", "HOST", "FUZZ", "SAVEDCWD", "temp_cwd", + "findfile", "sortdict", "check_syntax_error", "open_urlresource", "check_warnings", "CleanImport", "EnvironmentVarGuard", "TransientResource", "captured_output", "captured_stdout", "time_out", "socket_peer_reset", "ioerror_peer_reset", @@ -338,7 +338,7 @@ else: # Disambiguate TESTFN for parallel testing, while letting it remain a valid # module name. -TESTFN = "{0}_{1}_tmp".format(TESTFN, os.getpid()) +TESTFN = "{}_{}_tmp".format(TESTFN, os.getpid()) # Assuming sys.getfilesystemencoding()!=sys.getdefaultencoding() # TESTFN_UNICODE is a filename that can be encoded using the @@ -369,23 +369,37 @@ else: 'Unicode filename tests may not be effective' % TESTFN_UNICODE_UNENCODEABLE) -# Make sure we can write to TESTFN, try in /tmp if we can't -fp = None -try: - fp = open(TESTFN, 'w+') -except IOError: - TMP_TESTFN = os.path.join('/tmp', TESTFN) +# Save the initial cwd +SAVEDCWD = os.getcwd() + +@contextlib.contextmanager +def temp_cwd(name='tempcwd', quiet=False): + """ + Context manager that creates a temporary directory and set it as CWD. + + The new CWD is created in the current directory and it's named *name*. + If *quiet* is False (default) and it's not possible to create or change + the CWD, an error is raised. If it's True, only a warning is raised + and the original CWD is used. + """ + saved_dir = os.getcwd() + is_temporary = False try: - fp = open(TMP_TESTFN, 'w+') - TESTFN = TMP_TESTFN - del TMP_TESTFN - except IOError: - print(('WARNING: tests will fail, unable to write to: %s or %s' % - (TESTFN, TMP_TESTFN))) -if fp is not None: - fp.close() - unlink(TESTFN) -del fp + os.mkdir(name) + os.chdir(name) + is_temporary = True + except OSError: + if not quiet: + raise + warnings.warn('tests may fail, unable to change the CWD to ' + name, + RuntimeWarning, stacklevel=3) + try: + yield os.getcwd() + finally: + os.chdir(saved_dir) + if is_temporary: + rmtree(name) + def findfile(file, here=__file__): """Try to find a file on sys.path and the working directory. If it is not |