| """Supporting definitions for the Python regression tests.""" |
| |
| if __name__ != 'test.test_support': |
| raise ImportError, 'test_support must be imported from the test package' |
| |
| import sys |
| |
| class Error(Exception): |
| """Base class for regression test exceptions.""" |
| |
| class TestFailed(Error): |
| """Test failed.""" |
| |
| class TestSkipped(Error): |
| """Test skipped. |
| |
| This can be raised to indicate that a test was deliberatly |
| skipped, but not because a feature wasn't available. For |
| example, if some resource can't be used, such as the network |
| appears to be unavailable, this should be raised instead of |
| TestFailed. |
| """ |
| |
| class ResourceDenied(TestSkipped): |
| """Test skipped because it requested a disallowed resource. |
| |
| This is raised when a test calls requires() for a resource that |
| has not be enabled. It is used to distinguish between expected |
| and unexpected skips. |
| """ |
| |
| verbose = 1 # Flag set to 0 by regrtest.py |
| use_resources = None # Flag set to [] by regrtest.py |
| |
| # _original_stdout is meant to hold stdout at the time regrtest began. |
| # This may be "the real" stdout, or IDLE's emulation of stdout, or whatever. |
| # The point is to have some flavor of stdout the user can actually see. |
| _original_stdout = None |
| def record_original_stdout(stdout): |
| global _original_stdout |
| _original_stdout = stdout |
| |
| def get_original_stdout(): |
| return _original_stdout or sys.stdout |
| |
| def unload(name): |
| try: |
| del sys.modules[name] |
| except KeyError: |
| pass |
| |
| def forget(modname): |
| '''"Forget" a module was ever imported by removing it from sys.modules and |
| deleting any .pyc and .pyo files.''' |
| unload(modname) |
| import os |
| for dirname in sys.path: |
| try: |
| os.unlink(os.path.join(dirname, modname + os.extsep + 'pyc')) |
| except os.error: |
| pass |
| # Deleting the .pyo file cannot be within the 'try' for the .pyc since |
| # the chance exists that there is no .pyc (and thus the 'try' statement |
| # is exited) but there is a .pyo file. |
| try: |
| os.unlink(os.path.join(dirname, modname + os.extsep + 'pyo')) |
| except os.error: |
| pass |
| |
| def is_resource_enabled(resource): |
| """Test whether a resource is enabled. Known resources are set by |
| regrtest.py.""" |
| return use_resources is not None and resource in use_resources |
| |
| def requires(resource, msg=None): |
| """Raise ResourceDenied if the specified resource is not available. |
| |
| If the caller's module is __main__ then automatically return True. The |
| possibility of False being returned occurs when regrtest.py is executing.""" |
| # see if the caller's module is __main__ - if so, treat as if |
| # the resource was set |
| if sys._getframe().f_back.f_globals.get("__name__") == "__main__": |
| return |
| if not is_resource_enabled(resource): |
| if msg is None: |
| msg = "Use of the `%s' resource not enabled" % resource |
| raise ResourceDenied(msg) |
| |
| FUZZ = 1e-6 |
| |
| def fcmp(x, y): # fuzzy comparison function |
| if type(x) == type(0.0) or type(y) == type(0.0): |
| try: |
| x, y = coerce(x, y) |
| fuzz = (abs(x) + abs(y)) * FUZZ |
| if abs(x-y) <= fuzz: |
| return 0 |
| except: |
| pass |
| elif type(x) == type(y) and type(x) in (type(()), type([])): |
| for i in range(min(len(x), len(y))): |
| outcome = fcmp(x[i], y[i]) |
| if outcome != 0: |
| return outcome |
| return cmp(len(x), len(y)) |
| return cmp(x, y) |
| |
| try: |
| unicode |
| have_unicode = 1 |
| except NameError: |
| have_unicode = 0 |
| |
| is_jython = sys.platform.startswith('java') |
| |
| import os |
| # Filename used for testing |
| if os.name == 'java': |
| # Jython disallows @ in module names |
| TESTFN = '$test' |
| elif os.name == 'riscos': |
| TESTFN = 'testfile' |
| else: |
| TESTFN = '@test' |
| # Unicode name only used if TEST_FN_ENCODING exists for the platform. |
| if have_unicode: |
| if isinstance('', unicode): |
| # python -U |
| # XXX perhaps unicode() should accept Unicode strings? |
| TESTFN_UNICODE="@test-\xe0\xf2" |
| else: |
| TESTFN_UNICODE=unicode("@test-\xe0\xf2", "latin-1") # 2 latin characters. |
| TESTFN_ENCODING=sys.getfilesystemencoding() |
| |
| # 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) |
| 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() |
| try: |
| os.unlink(TESTFN) |
| except: |
| pass |
| del os, fp |
| |
| from os import unlink |
| |
| def findfile(file, here=__file__): |
| """Try to find a file on sys.path and the working directory. If it is not |
| found the argument passed to the function is returned (this does not |
| necessarily signal failure; could still be the legitimate path).""" |
| import os |
| if os.path.isabs(file): |
| return file |
| path = sys.path |
| path = [os.path.dirname(here)] + path |
| for dn in path: |
| fn = os.path.join(dn, file) |
| if os.path.exists(fn): return fn |
| return file |
| |
| def verify(condition, reason='test failed'): |
| """Verify that condition is true. If not, raise TestFailed. |
| |
| The optional argument reason can be given to provide |
| a better error text. |
| """ |
| |
| if not condition: |
| raise TestFailed(reason) |
| |
| def vereq(a, b): |
| """Raise TestFailed if a == b is false. |
| |
| This is better than verify(a == b) because, in case of failure, the |
| error message incorporates repr(a) and repr(b) so you can see the |
| inputs. |
| |
| Note that "not (a == b)" isn't necessarily the same as "a != b"; the |
| former is tested. |
| """ |
| |
| if not (a == b): |
| raise TestFailed, "%r == %r" % (a, b) |
| |
| def sortdict(dict): |
| "Like repr(dict), but in sorted order." |
| items = dict.items() |
| items.sort() |
| reprpairs = ["%r: %r" % pair for pair in items] |
| withcommas = ", ".join(reprpairs) |
| return "{%s}" % withcommas |
| |
| def check_syntax(statement): |
| try: |
| compile(statement, '<string>', 'exec') |
| except SyntaxError: |
| pass |
| else: |
| print 'Missing SyntaxError: "%s"' % statement |
| |
| |
| |
| #======================================================================= |
| # Preliminary PyUNIT integration. |
| |
| import unittest |
| |
| |
| class BasicTestRunner: |
| def run(self, test): |
| result = unittest.TestResult() |
| test(result) |
| return result |
| |
| |
| def run_suite(suite, testclass=None): |
| """Run tests from a unittest.TestSuite-derived class.""" |
| if verbose: |
| runner = unittest.TextTestRunner(sys.stdout, verbosity=2) |
| else: |
| runner = BasicTestRunner() |
| |
| result = runner.run(suite) |
| if not result.wasSuccessful(): |
| if len(result.errors) == 1 and not result.failures: |
| err = result.errors[0][1] |
| elif len(result.failures) == 1 and not result.errors: |
| err = result.failures[0][1] |
| else: |
| if testclass is None: |
| msg = "errors occurred; run in verbose mode for details" |
| else: |
| msg = "errors occurred in %s.%s" \ |
| % (testclass.__module__, testclass.__name__) |
| raise TestFailed(msg) |
| raise TestFailed(err) |
| |
| |
| def run_unittest(*classes): |
| """Run tests from unittest.TestCase-derived classes.""" |
| suite = unittest.TestSuite() |
| for cls in classes: |
| if isinstance(cls, (unittest.TestSuite, unittest.TestCase)): |
| suite.addTest(cls) |
| else: |
| suite.addTest(unittest.makeSuite(cls)) |
| if len(classes)==1: |
| testclass = classes[0] |
| else: |
| testclass = None |
| run_suite(suite, testclass) |
| |
| |
| #======================================================================= |
| # doctest driver. |
| |
| def run_doctest(module, verbosity=None): |
| """Run doctest on the given module. Return (#failures, #tests). |
| |
| If optional argument verbosity is not specified (or is None), pass |
| test_support's belief about verbosity on to doctest. Else doctest's |
| usual behavior is used (it searches sys.argv for -v). |
| """ |
| |
| import doctest |
| |
| if verbosity is None: |
| verbosity = verbose |
| else: |
| verbosity = None |
| |
| # Direct doctest output (normally just errors) to real stdout; doctest |
| # output shouldn't be compared by regrtest. |
| save_stdout = sys.stdout |
| sys.stdout = get_original_stdout() |
| try: |
| f, t = doctest.testmod(module, verbose=verbosity) |
| if f: |
| raise TestFailed("%d of %d doctests failed" % (f, t)) |
| finally: |
| sys.stdout = save_stdout |
| if verbose: |
| print 'doctest (%s) ... %d tests with zero failures' % (module.__name__, t) |
| return f, t |