twisted.names.test.test_client.ResolverTests(unittest.TestCase) class documentation

Part of twisted.names.test.test_client (View In Hierarchy)

Tests for client.Resolver.

Method test_clientProvidesIResolver client provides IResolver through a series of free functions.
Method test_clientResolverProvidesIResolver client.Resolver provides IResolver.
Method test_noServers client.Resolver raises ValueError if constructed with neither servers nor a nameserver configuration file.
Method test_missingConfiguration A missing nameserver configuration file results in no server information being loaded from it (ie, not an exception) and a default server being provided.
Method test_closesResolvConf As part of its constructor, StubResolver opens /etc/resolv.conf; then, explicitly closes it and does not count on the GC to do so for it.
Method test_domainEmptyArgument client.Resolver.parseConfig treats a domain line without an argument as indicating a domain of b"".
Method test_searchEmptyArgument client.Resolver.parseConfig treats a search line without an argument as indicating an empty search suffix.
Method test_datagramQueryServerOrder No summary
Method test_singleConcurrentRequest client.Resolver.query only issues one request at a time per query. Subsequent requests made before responses to prior ones are received are queued and given the same response as is given to the first one.
Method test_multipleConcurrentRequests client.Resolver.query issues a request for each different concurrent query.
Method test_multipleSequentialRequests After a response is received to a query issued with client.Resolver.query, another query with the same parameters results in a new network request.
Method test_multipleConcurrentFailure If the result of a request is an error response, the Deferreds for all concurrently issued requests associated with that result fire with the Failure.
Method test_connectedProtocol client.Resolver._connectedProtocol returns a new DNSDatagramProtocol connected to a new address with a cryptographically secure random port number.
Method test_resolverUsesOnlyParameterizedReactor If a reactor instance is supplied to client.Resolver client.Resolver._connectedProtocol should pass that reactor to twisted.names.dns.DNSDatagramProtocol.
Method test_differentProtocol client.Resolver._connectedProtocol is called once each time a UDP request needs to be issued and the resulting protocol instance is used for that request.
Method test_ipv6Resolver If the resolver is ipv6, open a ipv6 port.
Method test_disallowedPort If a port number is initially selected which cannot be bound, the CannotListenError is handled and another port number is attempted.
Method test_disallowedPortRepeatedly If port numbers that cannot be bound are repeatedly selected, resolver._connectedProtocol will give up eventually.
Method test_runOutOfFiles If the process is out of files, Resolver._connectedProtocol will give up.
Method test_differentProtocolAfterTimeout When a query issued by client.Resolver.query times out, the retry uses a new protocol instance.
Method test_protocolShutDown After the Deferred returned by DNSDatagramProtocol.query is called back, the DNSDatagramProtocol is disconnected from its transport.
Method test_protocolShutDownAfterTimeout The DNSDatagramProtocol created when an interim timeout occurs is also disconnected from its transport after the Deferred returned by its query method completes.
Method test_protocolShutDownAfterFailure If the Deferred returned by DNSDatagramProtocol.query fires with a failure, the DNSDatagramProtocol is still disconnected from its transport.
Method test_tcpDisconnectRemovesFromConnections When a TCP DNS protocol associated with a Resolver disconnects, it is removed from the Resolver's connection list.
Method test_singleTCPQueryErrbackOnConnectionFailure The deferred returned by client.Resolver.queryTCP will errback when the TCP connection attempt fails. The reason for the connection failure is passed as the argument to errback.
Method test_multipleTCPQueryErrbackOnConnectionFailure All pending resolver.queryTCP deferreds will errback with the same Failure if the connection attempt fails.
Method test_reentrantTCPQueryErrbackOnConnectionFailure An errback on the deferred returned by client.Resolver.queryTCP may trigger another TCP query.
Method test_pendingEmptiedInPlaceOnError When the TCP connection attempt fails, the client.Resolver.pending list is emptied in place. It is not replaced with a new empty list.

Inherited from TestCase:

Instance Variable timeout A real number of seconds. If set, the test will raise an error if it takes longer than timeout seconds. If not set, util.DEFAULT_TIMEOUT_DURATION is used.
Method __init__ Construct an asynchronous test case for methodName.
Method assertFailure Fail if deferred does not errback with one of expectedFailures. Returns the original Deferred with callbacks added. You will need to return this Deferred from your test case.
Method __call__ Run the test. Should always do exactly the same thing as run().
Method deferSetUp Undocumented
Method deferTestMethod Undocumented
Method deferTearDown Undocumented
Method deferRunCleanups Run any scheduled cleanups and report errors (if any to the result object.
Method addCleanup Extend the base cleanup feature with support for cleanup functions which return Deferreds.
Method getSuppress Undocumented
Method getTimeout No summary
Method _run Run a single method, either a test method or fixture.
Method _ebDeferSetUp Undocumented
Method _cbDeferTestMethod Undocumented
Method _ebDeferTestMethod Undocumented
Method _ebDeferTearDown Undocumented
Method _cbDeferRunCleanups Undocumented
Method _cleanUp Undocumented
Method _classCleanUp Undocumented
Method _makeReactorMethod Create a method which wraps the reactor method name. The new method issues a deprecation warning and calls the original.
Method _deprecateReactor Deprecate iterate, crash and stop on reactor. That is, each method is wrapped in a function that issues a deprecation warning, then calls the original.
Method _undeprecateReactor Restore the deprecated reactor methods. Undoes what _deprecateReactor did.
Method _runCleanups Run the cleanups added with addCleanup in order.
Method _runFixturesAndTest Really run setUp, the test method, and tearDown. Any of these may return defer.Deferreds. After they complete, do some reactor cleanup.
Method _wait Take a Deferred that only ever callbacks. Block until it happens.

Inherited from SynchronousTestCase (via TestCase):

Instance Variable failureException An exception class, defaulting to FailTest. If the test method raises this exception, it will be reported as a failure, rather than an exception. All of the assertion methods raise this if the assertion fails.
Instance Variable skip None or a string explaining why this test is to be skipped. If defined, the test will not be run. Instead, it will be reported to the result object as 'skipped' (if the TestResult supports skipping).
Instance Variable todo None, a string or a tuple of (errors, reason) where errors is either an exception class or an iterable of exception classes, and reason is a string. See Todo or makeTodo for more information.
Instance Variable suppress None or a list of tuples of (args, kwargs) to be passed to warnings.filterwarnings. Use these to suppress warnings raised in a test. Useful for testing deprecated code. See also util.suppress.
Method __eq__ No summary
Method __ne__ Undocumented
Method __hash__ Undocumented
Method shortDescription Undocumented
Method getSkip No summary
Method getTodo No summary
Method runTest If no methodName argument is passed to the constructor, run will treat this method as the thing with the actual test inside.
Method run Run the test case, storing the results in result.
Method patch Monkey patch an object for the duration of the test.
Method flushLoggedErrors Remove stored errors received from the log.
Method flushWarnings Remove stored warnings from the list of captured warnings and return them.
Method callDeprecated Call a function that should have been deprecated at a specific version and in favor of a specific alternative, and assert that it was thusly deprecated.
Method mktemp Create a new path name which can be used for a new file or directory.
Method _getSuppress No summary
Method _getSkipReason Return the reason to use for skipping a test method.
Method _installObserver Undocumented
Method _removeObserver Undocumented

Inherited from _Assertions (via TestCase, SynchronousTestCase):

Method fail Absolutely fail the test. Do not pass go, do not collect $200.
Method assertFalse Fail the test if condition evaluates to True.
Method assertTrue Fail the test if condition evaluates to False.
Method assertRaises Fail the test unless calling the function f with the given args and kwargs raises exception. The failure will report the traceback and call stack of the unexpected exception.
Method assertEqual Fail the test if first and second are not equal.
Method assertIs Fail the test if first is not second. This is an obect-identity-equality test, not an object equality (i.e. __eq__) test.
Method assertIsNot Fail the test if first is second. This is an obect-identity-equality test, not an object equality (i.e. __eq__) test.
Method assertNotEqual Fail the test if first == second.
Method assertIn Fail the test if containee is not found in container.
Method assertNotIn Fail the test if containee is found in container.
Method assertNotAlmostEqual Fail if the two objects are equal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.
Method assertAlmostEqual Fail if the two objects are unequal as determined by their difference rounded to the given number of decimal places (default 7) and comparing to zero.
Method assertApproximates Fail if first - second > tolerance
Method assertSubstring Fail if substring does not exist within astring.
Method assertNotSubstring Fail if astring contains substring.
Method assertWarns Fail if the given function doesn't generate the specified warning when called. It calls the function, checks the warning, and forwards the result of the function if everything is fine.
Method assertIsInstance Fail if instance is not an instance of the given class or of one of the given classes.
Method assertNotIsInstance Fail if instance is an instance of the given class or of one of the given classes.
Method successResultOf Return the current success result of deferred or raise self.failureException.
Method failureResultOf Return the current failure result of deferred or raise self.failureException.
Method assertNoResult Assert that deferred does not have a result at this point.
Method assertRegex Fail the test if a regexp search of text fails.
def test_clientProvidesIResolver(self):

client provides IResolver through a series of free functions.

def test_clientResolverProvidesIResolver(self):

client.Resolver provides IResolver.

def test_noServers(self):

client.Resolver raises ValueError if constructed with neither servers nor a nameserver configuration file.

def test_missingConfiguration(self):

A missing nameserver configuration file results in no server information being loaded from it (ie, not an exception) and a default server being provided.

def test_closesResolvConf(self):

As part of its constructor, StubResolver opens /etc/resolv.conf; then, explicitly closes it and does not count on the GC to do so for it.

def test_domainEmptyArgument(self):

client.Resolver.parseConfig treats a domain line without an argument as indicating a domain of b"".

def test_searchEmptyArgument(self):

client.Resolver.parseConfig treats a search line without an argument as indicating an empty search suffix.

def test_datagramQueryServerOrder(self):

client.Resolver.queryUDP should issue queries to its dns.DNSDatagramProtocol with server addresses taken from its own servers and dynServers lists, proceeding through them in order as DNSQueryTimeoutErrors occur.

def test_singleConcurrentRequest(self):

client.Resolver.query only issues one request at a time per query. Subsequent requests made before responses to prior ones are received are queued and given the same response as is given to the first one.

def test_multipleConcurrentRequests(self):

client.Resolver.query issues a request for each different concurrent query.

def test_multipleSequentialRequests(self):

After a response is received to a query issued with client.Resolver.query, another query with the same parameters results in a new network request.

def test_multipleConcurrentFailure(self):

If the result of a request is an error response, the Deferreds for all concurrently issued requests associated with that result fire with the Failure.

def test_connectedProtocol(self):

client.Resolver._connectedProtocol returns a new DNSDatagramProtocol connected to a new address with a cryptographically secure random port number.

def test_resolverUsesOnlyParameterizedReactor(self):

If a reactor instance is supplied to client.Resolver client.Resolver._connectedProtocol should pass that reactor to twisted.names.dns.DNSDatagramProtocol.

def test_differentProtocol(self):

client.Resolver._connectedProtocol is called once each time a UDP request needs to be issued and the resulting protocol instance is used for that request.

def test_ipv6Resolver(self):

If the resolver is ipv6, open a ipv6 port.

def test_disallowedPort(self):

If a port number is initially selected which cannot be bound, the CannotListenError is handled and another port number is attempted.

def test_disallowedPortRepeatedly(self):

If port numbers that cannot be bound are repeatedly selected, resolver._connectedProtocol will give up eventually.

def test_runOutOfFiles(self):

If the process is out of files, Resolver._connectedProtocol will give up.

def test_differentProtocolAfterTimeout(self):

When a query issued by client.Resolver.query times out, the retry uses a new protocol instance.

def test_protocolShutDown(self):

After the Deferred returned by DNSDatagramProtocol.query is called back, the DNSDatagramProtocol is disconnected from its transport.

def test_protocolShutDownAfterTimeout(self):

The DNSDatagramProtocol created when an interim timeout occurs is also disconnected from its transport after the Deferred returned by its query method completes.

def test_protocolShutDownAfterFailure(self):

If the Deferred returned by DNSDatagramProtocol.query fires with a failure, the DNSDatagramProtocol is still disconnected from its transport.

def test_tcpDisconnectRemovesFromConnections(self):

When a TCP DNS protocol associated with a Resolver disconnects, it is removed from the Resolver's connection list.

def test_singleTCPQueryErrbackOnConnectionFailure(self):

The deferred returned by client.Resolver.queryTCP will errback when the TCP connection attempt fails. The reason for the connection failure is passed as the argument to errback.

def test_multipleTCPQueryErrbackOnConnectionFailure(self):

All pending resolver.queryTCP deferreds will errback with the same Failure if the connection attempt fails.

def test_reentrantTCPQueryErrbackOnConnectionFailure(self):

An errback on the deferred returned by client.Resolver.queryTCP may trigger another TCP query.

def test_pendingEmptiedInPlaceOnError(self):

When the TCP connection attempt fails, the client.Resolver.pending list is emptied in place. It is not replaced with a new empty list.

API Documentation for twisted, generated by pydoctor at 2020-03-25 17:34:30.