Python test.support.requires() Examples

def test_networked_good_cert(self):
        # We feed the server's cert as a validating cert
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
            self.assertEqual(context.verify_mode, ssl.CERT_REQUIRED)
            self.assertEqual(context.check_hostname, True)
            context.load_verify_locations(CERT_selfsigned_pythontestdotnet)
            h = client.HTTPSConnection('self-signed.pythontest.net', 443, context=context)
            h.request('GET', '/')
            resp = h.getresponse()
            server_string = resp.getheader('server')
            resp.close()
            h.close()
            self.assertIn('nginx', server_string) 

def requires_curses_func(name):
    return unittest.skipUnless(hasattr(curses, name),
                               'requires curses.%s' % name) 

def test_main():
    support.requires("network")
    support.run_unittest(PythonBuildersTest) 

def test_main():
    support.requires('network')
    support.run_unittest(
        CreationTestCase,
        TCPTimeoutTestCase,
        UDPTimeoutTestCase,
    ) 

def test_exists(self):
        self.assertEqual(self.tv.exists('something'), False)
        self.assertEqual(self.tv.exists(''), True)
        self.assertEqual(self.tv.exists({}), False)

        # the following will make a tk.call equivalent to
        # tk.call(treeview, "exists") which should result in an error
        # in the tcl interpreter since tk requires an item.
        self.assertRaises(tkinter.TclError, self.tv.exists, None) 

def test_large_file_ops(self):
        # On Windows and Mac OSX this test comsumes large resources; It takes
        # a long time to build the >2GB file and takes >2GB of disk space
        # therefore the resource must be enabled to run this test.
        if sys.platform[:3] == 'win' or sys.platform == 'darwin':
            support.requires(
                'largefile',
                'test requires %s bytes and a long time to run' % self.LARGE)
        with self.open(support.TESTFN, "w+b", 0) as f:
            self.large_file_ops(f)
        with self.open(support.TESTFN, "w+b") as f:
            self.large_file_ops(f) 

def test_unbounded_file(self):
        # Issue #1174606: reading from an unbounded stream such as /dev/zero.
        zero = "/dev/zero"
        if not os.path.exists(zero):
            self.skipTest("{0} does not exist".format(zero))
        if sys.maxsize > 0x7FFFFFFF:
            self.skipTest("test can only run in a 32-bit address space")
        if support.real_max_memuse < support._2G:
            self.skipTest("test requires at least 2GB of memory")
        with self.open(zero, "rb", buffering=0) as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "rb") as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "r") as f:
            self.assertRaises(OverflowError, f.read) 

def setUpModule():
    try:
        import signal
        # The default handler for SIGXFSZ is to abort the process.
        # By ignoring it, system calls exceeding the file size resource
        # limit will raise OSError instead of crashing the interpreter.
        signal.signal(signal.SIGXFSZ, signal.SIG_IGN)
    except (ImportError, AttributeError):
        pass

    # On Windows and Mac OSX this test comsumes large resources; It
    # takes a long time to build the >2GB file and takes >2GB of disk
    # space therefore the resource must be enabled to run this test.
    # If not, nothing after this line stanza will be executed.
    if sys.platform[:3] == 'win' or sys.platform == 'darwin':
        requires('largefile',
                 'test requires %s bytes and a long time to run' % str(size))
    else:
        # Only run if the current filesystem supports large files.
        # (Skip this test on Windows, since we now always support
        # large files.)
        f = open(TESTFN, 'wb', buffering=0)
        try:
            # 2**31 == 2147483648
            f.seek(2147483649)
            # Seeking is not enough of a test: you must write and flush, too!
            f.write(b'x')
            f.flush()
        except (OSError, OverflowError):
            raise unittest.SkipTest("filesystem does not have "
                                    "largefile support")
        finally:
            f.close()
            unlink(TESTFN) 

def setUpClass(cls):
        support.requires("network")
        with support.transient_internet(cls.NNTP_HOST):
            try:
                cls.server = cls.NNTP_CLASS(cls.NNTP_HOST, timeout=TIMEOUT,
                                            usenetrc=False)
            except EOFError:
                raise unittest.SkipTest("%s got EOF error on connecting "
                                        "to %r" % (cls, cls.NNTP_HOST)) 

def test_networked(self):
        # Default settings: requires a valid cert from a trusted CA
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            h = client.HTTPSConnection('self-signed.pythontest.net', 443)
            with self.assertRaises(ssl.SSLError) as exc_info:
                h.request('GET', '/')
            self.assertEqual(exc_info.exception.reason, 'CERTIFICATE_VERIFY_FAILED') 

def test_networked_trusted_by_default_cert(self):
        # Default settings: requires a valid cert from a trusted CA
        support.requires('network')
        with support.transient_internet('www.python.org'):
            h = client.HTTPSConnection('www.python.org', 443)
            h.request('GET', '/')
            resp = h.getresponse()
            content_type = resp.getheader('content-type')
            resp.close()
            h.close()
            self.assertIn('text/html', content_type) 

def test_networked_good_cert(self):
        # We feed the server's cert as a validating cert
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
            context.verify_mode = ssl.CERT_REQUIRED
            context.load_verify_locations(CERT_selfsigned_pythontestdotnet)
            h = client.HTTPSConnection('self-signed.pythontest.net', 443, context=context)
            h.request('GET', '/')
            resp = h.getresponse()
            server_string = resp.getheader('server')
            resp.close()
            h.close()
            self.assertIn('nginx', server_string) 

def test_networked_bad_cert(self):
        # We feed a "CA" cert that is unrelated to the server's cert
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
            context.verify_mode = ssl.CERT_REQUIRED
            context.load_verify_locations(CERT_localhost)
            h = client.HTTPSConnection('self-signed.pythontest.net', 443, context=context)
            with self.assertRaises(ssl.SSLError) as exc_info:
                h.request('GET', '/')
            self.assertEqual(exc_info.exception.reason, 'CERTIFICATE_VERIFY_FAILED') 

def testPythonOrg(self):
        support.requires('network')
        with support.transient_internet('www.python.org'):
            parser = urllib.robotparser.RobotFileParser(
                "http://www.python.org/robots.txt")
            parser.read()
            self.assertTrue(
                parser.can_fetch("*", "http://www.python.org/robots.txt")) 

def test_networked_bad_cert(self):
        # We feed a "CA" cert that is unrelated to the server's cert
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            context = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
            context.verify_mode = ssl.CERT_REQUIRED
            context.load_verify_locations(CERT_localhost)
            h = client.HTTPSConnection('self-signed.pythontest.net', 443, context=context)
            with self.assertRaises(ssl.SSLError) as exc_info:
                h.request('GET', '/')
            self.assertEqual(exc_info.exception.reason, 'CERTIFICATE_VERIFY_FAILED') 

def test_main():
    support.requires("network")
    support.run_unittest(PythonBuildersTest) 

def test_main():
    support.requires('network')
    support.run_unittest(
        CreationTestCase,
        TCPTimeoutTestCase,
        UDPTimeoutTestCase,
    ) 

def test_exists(self):
        self.assertEqual(self.tv.exists('something'), False)
        self.assertEqual(self.tv.exists(''), True)
        self.assertEqual(self.tv.exists({}), False)

        # the following will make a tk.call equivalent to
        # tk.call(treeview, "exists") which should result in an error
        # in the tcl interpreter since tk requires an item.
        self.assertRaises(tkinter.TclError, self.tv.exists, None) 

def test_large_file_ops(self):
        # On Windows and Mac OSX this test consumes large resources; It takes
        # a long time to build the >2 GiB file and takes >2 GiB of disk space
        # therefore the resource must be enabled to run this test.
        if sys.platform[:3] == 'win' or sys.platform == 'darwin':
            support.requires(
                'largefile',
                'test requires %s bytes and a long time to run' % self.LARGE)
        with self.open(support.TESTFN, "w+b", 0) as f:
            self.large_file_ops(f)
        with self.open(support.TESTFN, "w+b") as f:
            self.large_file_ops(f) 

def test_unbounded_file(self):
        # Issue #1174606: reading from an unbounded stream such as /dev/zero.
        zero = "/dev/zero"
        if not os.path.exists(zero):
            self.skipTest("{0} does not exist".format(zero))
        if sys.maxsize > 0x7FFFFFFF:
            self.skipTest("test can only run in a 32-bit address space")
        if support.real_max_memuse < support._2G:
            self.skipTest("test requires at least 2 GiB of memory")
        with self.open(zero, "rb", buffering=0) as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "rb") as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "r") as f:
            self.assertRaises(OverflowError, f.read) 

def setUpModule():
    try:
        import signal
        # The default handler for SIGXFSZ is to abort the process.
        # By ignoring it, system calls exceeding the file size resource
        # limit will raise OSError instead of crashing the interpreter.
        signal.signal(signal.SIGXFSZ, signal.SIG_IGN)
    except (ImportError, AttributeError):
        pass

    # On Windows and Mac OSX this test consumes large resources; It
    # takes a long time to build the >2 GiB file and takes >2 GiB of disk
    # space therefore the resource must be enabled to run this test.
    # If not, nothing after this line stanza will be executed.
    if sys.platform[:3] == 'win' or sys.platform == 'darwin':
        requires('largefile',
                 'test requires %s bytes and a long time to run' % str(size))
    else:
        # Only run if the current filesystem supports large files.
        # (Skip this test on Windows, since we now always support
        # large files.)
        f = open(TESTFN, 'wb', buffering=0)
        try:
            # 2**31 == 2147483648
            f.seek(2147483649)
            # Seeking is not enough of a test: you must write and flush, too!
            f.write(b'x')
            f.flush()
        except (OSError, OverflowError):
            raise unittest.SkipTest("filesystem does not have "
                                    "largefile support")
        finally:
            f.close()
            unlink(TESTFN) 

def setUpClass(cls):
        support.requires("network")
        with support.transient_internet(cls.NNTP_HOST):
            try:
                cls.server = cls.NNTP_CLASS(cls.NNTP_HOST, timeout=TIMEOUT,
                                            usenetrc=False)
            except EOF_ERRORS:
                raise unittest.SkipTest(f"{cls} got EOF error on connecting "
                                        f"to {cls.NNTP_HOST!r}") 

def test_networked(self):
        # Default settings: requires a valid cert from a trusted CA
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            h = client.HTTPSConnection('self-signed.pythontest.net', 443)
            with self.assertRaises(ssl.SSLError) as exc_info:
                h.request('GET', '/')
            self.assertEqual(exc_info.exception.reason, 'CERTIFICATE_VERIFY_FAILED') 

def test_networked_trusted_by_default_cert(self):
        # Default settings: requires a valid cert from a trusted CA
        support.requires('network')
        with support.transient_internet('www.python.org'):
            h = client.HTTPSConnection('www.python.org', 443)
            h.request('GET', '/')
            resp = h.getresponse()
            content_type = resp.getheader('content-type')
            resp.close()
            h.close()
            self.assertIn('text/html', content_type) 

def test_networked_bad_cert(self):
        # We feed a "CA" cert that is unrelated to the server's cert
        import ssl
        support.requires('network')
        with support.transient_internet('self-signed.pythontest.net'):
            context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
            context.load_verify_locations(CERT_localhost)
            h = client.HTTPSConnection('self-signed.pythontest.net', 443, context=context)
            with self.assertRaises(ssl.SSLError) as exc_info:
                h.request('GET', '/')
            self.assertEqual(exc_info.exception.reason, 'CERTIFICATE_VERIFY_FAILED') 

def test_main():
    support.requires("network")
    support.run_unittest(PythonBuildersTest) 

def test_resources(self):
        # test -u command line option
        tests = {}
        for resource in ('audio', 'network'):
            code = textwrap.dedent("""
                        from test import support; support.requires(%r)
                        import unittest
                        class PassingTest(unittest.TestCase):
                            def test_pass(self):
                                pass

                        def test_main():
                            support.run_unittest(PassingTest)
                    """ % resource)

            tests[resource] = self.create_test(resource, code)
        test_names = sorted(tests.values())

        # -u all: 2 resources enabled
        output = self.run_tests('-u', 'all', *test_names)
        self.check_executed_tests(output, test_names)

        # -u audio: 1 resource enabled
        output = self.run_tests('-uaudio', *test_names)
        self.check_executed_tests(output, test_names,
                                  skipped=tests['network'])

        # no option: 0 resources enabled
        output = self.run_tests(*test_names)
        self.check_executed_tests(output, test_names,
                                  skipped=test_names) 

def setUpClass(cls):
        support.requires('network')
        with support.transient_internet(cls.base_url):
            cls.parser = robotparser.RobotFileParser(cls.robots_txt)
            cls.parser.read() 

def test_large_file_ops(self):
        # On Windows and Mac OSX this test comsumes large resources; It takes
        # a long time to build the >2GB file and takes >2GB of disk space
        # therefore the resource must be enabled to run this test.
        if sys.platform[:3] == 'win' or sys.platform == 'darwin':
            support.requires(
                'largefile',
                'test requires %s bytes and a long time to run' % self.LARGE)
        with self.open(support.TESTFN, "w+b", 0) as f:
            self.large_file_ops(f)
        with self.open(support.TESTFN, "w+b") as f:
            self.large_file_ops(f) 

def test_unbounded_file(self):
        # Issue #1174606: reading from an unbounded stream such as /dev/zero.
        zero = "/dev/zero"
        if not os.path.exists(zero):
            self.skipTest("{0} does not exist".format(zero))
        if sys.maxsize > 0x7FFFFFFF:
            self.skipTest("test can only run in a 32-bit address space")
        if support.real_max_memuse < support._2G:
            self.skipTest("test requires at least 2GB of memory")
        with self.open(zero, "rb", buffering=0) as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "rb") as f:
            self.assertRaises(OverflowError, f.read)
        with self.open(zero, "r") as f:
            self.assertRaises(OverflowError, f.read)