diff options
Diffstat (limited to 'Lib/test/support.py')
| -rw-r--r-- | Lib/test/support.py | 85 |
1 files changed, 58 insertions, 27 deletions
diff --git a/Lib/test/support.py b/Lib/test/support.py index a9e1b77..e8a5911 100644 --- a/Lib/test/support.py +++ b/Lib/test/support.py @@ -15,7 +15,7 @@ import shutil import warnings import unittest import importlib -import collections +import collections.abc import re import subprocess import imp @@ -33,16 +33,15 @@ __all__ = [ "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", "SAVEDCWD", "temp_cwd", + "IPV6_ENABLED", "is_jython", "TESTFN", "HOST", "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", - "run_with_locale", 'temp_umask', "transient_internet", - "set_memlimit", "bigmemtest", "bigaddrspacetest", "BasicTestRunner", - "run_unittest", "run_doctest", "threading_setup", "threading_cleanup", - "reap_children", "cpython_only", "check_impl_detail", "get_attribute", - "swap_item", "swap_attr", "requires_IEEE_754", + "TransientResource", "captured_output", "captured_stdout", "time_out", + "socket_peer_reset", "ioerror_peer_reset", "run_with_locale", 'temp_umask', + "transient_internet", "set_memlimit", "bigmemtest", "bigaddrspacetest", + "BasicTestRunner", "run_unittest", "run_doctest", "threading_setup", + "threading_cleanup", "reap_children", "cpython_only", "check_impl_detail", + "get_attribute", "swap_item", "swap_attr", "requires_IEEE_754", "TestHandler", "Matcher", "can_symlink", "skip_unless_symlink"] @@ -381,23 +380,20 @@ def bind_port(sock, host=HOST): port = sock.getsockname()[1] return port -FUZZ = 1e-6 - -def fcmp(x, y): # fuzzy comparison function - if isinstance(x, float) or isinstance(y, float): +def _is_ipv6_enabled(): + """Check whether IPv6 is enabled on this host.""" + if socket.has_ipv6: try: - fuzz = (abs(x) + abs(y)) * FUZZ - if abs(x-y) <= fuzz: - return 0 - except: + sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM) + sock.bind(('::1', 0)) + except (socket.error, socket.gaierror): pass - elif type(x) == type(y) and isinstance(x, (tuple, list)): - for i in range(min(len(x), len(y))): - outcome = fcmp(x[i], y[i]) - if outcome != 0: - return outcome - return (len(x) > len(y)) - (len(x) < len(y)) - return (x > y) - (x < y) + else: + sock.close() + return True + return False + +IPV6_ENABLED = _is_ipv6_enabled() # decorator for skipping tests on non-IEEE 754 platforms requires_IEEE_754 = unittest.skipUnless( @@ -714,7 +710,7 @@ class CleanImport(object): sys.modules.update(self.original_modules) -class EnvironmentVarGuard(collections.MutableMapping): +class EnvironmentVarGuard(collections.abc.MutableMapping): """Class to help protect the environment variable properly. Can be used as a context manager.""" @@ -1049,6 +1045,11 @@ def bigmemtest(minsize, memuse): return decorator def precisionbigmemtest(size, memuse): + """Decorator for bigmem tests that need exact sizes. + + Like bigmemtest, but without the size scaling upward to fill available + memory. + """ def decorator(f): def wrapper(self): size = wrapper.size @@ -1144,6 +1145,32 @@ def check_impl_detail(**guards): return guards.get(platform.python_implementation().lower(), default) +def no_tracing(func): + """Decorator to temporarily turn off tracing for the duration of a test.""" + if not hasattr(sys, 'gettrace'): + return func + else: + @functools.wraps(func) + def wrapper(*args, **kwargs): + original_trace = sys.gettrace() + try: + sys.settrace(None) + return func(*args, **kwargs) + finally: + sys.settrace(original_trace) + return wrapper + + +def refcount_test(test): + """Decorator for tests which involve reference counting. + + To start, the decorator does not run the test if is not run by CPython. + After that, any trace function is unset during the test to prevent + unexpected refcounts caused by the trace function. + + """ + return no_tracing(cpython_only(test)) + def _run_suite(suite): """Run tests from a unittest.TestSuite-derived class.""" @@ -1368,7 +1395,7 @@ def strip_python_stderr(stderr): def args_from_interpreter_flags(): """Return a list of command-line arguments reproducing the current - settings in sys.flags.""" + settings in sys.flags and sys.warnoptions.""" flag_opt_map = { 'bytes_warning': 'b', 'dont_write_bytecode': 'B', @@ -1383,6 +1410,8 @@ def args_from_interpreter_flags(): v = getattr(sys.flags, flag) if v > 0: args.append('-' + opt * v) + for opt in sys.warnoptions: + args.append('-W' + opt) return args #============================================================ @@ -1456,9 +1485,11 @@ def can_symlink(): global _can_symlink if _can_symlink is not None: return _can_symlink + symlink_path = TESTFN + "can_symlink" try: - os.symlink(TESTFN, TESTFN + "can_symlink") + os.symlink(TESTFN, symlink_path) can = True + os.remove(symlink_path) except (OSError, NotImplementedError): can = False _can_symlink = can |