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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for implementations of L{IReactorTime}.
"""
from twisted.internet.interfaces import IReactorThreads, IReactorTime
from twisted.internet.test.reactormixins import ReactorBuilder
from twisted.python.log import msg
from twisted.python.runtime import platform
from twisted.trial.unittest import SkipTest
class TimeTestsBuilder(ReactorBuilder):
"""
Builder for defining tests relating to L{IReactorTime}.
"""
requiredInterfaces = (IReactorTime,)
def test_delayedCallStopsReactor(self):
"""
The reactor can be stopped by a delayed call.
"""
reactor = self.buildReactor()
reactor.callLater(0, reactor.stop)
reactor.run()
def test_distantDelayedCall(self):
"""
Scheduling a delayed call at a point in the extreme future does not
prevent normal reactor operation.
"""
reactor = self.buildReactor()
if IReactorThreads.providedBy(reactor):
def eventSource(reactor, event):
msg(
format="Thread-based event-source scheduling %(event)r", event=event
)
reactor.callFromThread(event)
else:
raise SkipTest(
"Do not know how to synthesize non-time event to " "stop the test"
)
# Pick a pretty big delay.
delayedCall = reactor.callLater(2 ** 128 + 1, lambda: None)
def stop():
msg("Stopping the reactor")
reactor.stop()
# Use repeated invocation of the event source to set up the call to stop
# the reactor. This makes it more likely at least one normal iteration
# will take place with the delayed call in place before the slightly
# different reactor shutdown logic alters things.
eventSource(reactor, lambda: eventSource(reactor, stop))
# Run the reactor directly, without a timeout. A timeout would
# interfere with the purpose of this test, which is to have the timeout
# passed to the reactor's doIterate implementation (potentially) be
# very, very large. Hopefully the event source defined above will work
# and cause the reactor to stop.
reactor.run()
# The reactor almost surely stopped before the delayed call
# fired... right?
self.assertTrue(delayedCall.active())
self.assertIn(delayedCall, reactor.getDelayedCalls())
class GlibTimeTestsBuilder(ReactorBuilder):
"""
Builder for defining tests relating to L{IReactorTime} for reactors based
off glib.
"""
requiredInterfaces = (IReactorTime,)
if platform.isWindows():
_reactors = ["twisted.internet.gtk2reactor.PortableGtkReactor"]
else:
_reactors = [
"twisted.internet.glib2reactor.Glib2Reactor",
"twisted.internet.gtk2reactor.Gtk2Reactor",
]
def test_timeout_add(self):
"""
A
L{reactor.callLater<twisted.internet.interfaces.IReactorTime.callLater>}
call scheduled from a C{gobject.timeout_add}
call is run on time.
"""
import gobject # type: ignore[import]
reactor = self.buildReactor()
result = []
def gschedule():
reactor.callLater(0, callback)
return 0
def callback():
result.append(True)
reactor.stop()
reactor.callWhenRunning(gobject.timeout_add, 10, gschedule)
self.runReactor(reactor, 5)
self.assertEqual(result, [True])
globals().update(TimeTestsBuilder.makeTestCaseClasses())
globals().update(GlibTimeTestsBuilder.makeTestCaseClasses())
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