twisted.names.test.test_client.ResolverTests(unittest.TestCase)
class documentationtwisted.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 deferred s 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.Deferred s.
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. |
client.Resolver
raises ValueError
if constructed with neither servers nor a nameserver configuration
file.
A missing nameserver configuration file results in no server information being loaded from it (ie, not an exception) and a default server being provided.
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.
client.Resolver.parseConfig
treats a domain line without an argument as indicating a domain of
b""
.
client.Resolver.parseConfig
treats a search line without an argument as indicating an empty
search suffix.
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 DNSQueryTimeoutError
s
occur.
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.
client.Resolver.query
issues a request for each different concurrent query.
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.
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
.
client.Resolver._connectedProtocol
returns a new DNSDatagramProtocol
connected to a new address with a cryptographically secure random port
number.
If a reactor instance is supplied to client.Resolver
client.Resolver._connectedProtocol
should pass that reactor to twisted.names.dns.DNSDatagramProtocol
.
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.
If a port number is initially selected which cannot be bound, the CannotListenError
is handled and another port number is attempted.
If port numbers that cannot be bound are repeatedly selected,
resolver._connectedProtocol
will give up eventually.
If the process is out of files, Resolver._connectedProtocol
will give up.
When a query issued by client.Resolver.query
times out, the retry uses a new protocol instance.
After the Deferred
returned by DNSDatagramProtocol.query
is called back, the DNSDatagramProtocol
is disconnected from its transport.
The DNSDatagramProtocol
created when an interim timeout occurs is also disconnected from its
transport after the Deferred returned by its query method completes.
If the Deferred
returned by DNSDatagramProtocol.query
fires with a failure, the DNSDatagramProtocol
is still disconnected from its transport.
When a TCP DNS protocol associated with a Resolver disconnects, it is removed from the Resolver's connection list.
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.
All pending resolver.queryTCP
deferred
s will
errback
with the same Failure
if the connection
attempt fails.
An errback on the deferred returned by client.Resolver.queryTCP
may trigger another TCP query.