Current File : //lib/python3/dist-packages/twisted/internet/test/test_reactormixins.py
"""
Tests L{twisted.internet.test.reactormixins}, the reactor-testing support
module.
"""
from hamcrest import assert_that, equal_to, has_length
from typing import NoReturn
# Trial should expose matches_result publically.
# https://github.com/twisted/twisted/issues/11709
from twisted.trial._dist.test.matchers import matches_result
from twisted.trial.reporter import TestResult
from twisted.trial.runner import TestLoader
from twisted.trial.unittest import SynchronousTestCase, TestSuite
from .reactormixins import ReactorBuilder
UNSUPPORTED = "This reactor is unsupported."
def unsupportedReactor(self: ReactorBuilder) -> NoReturn:
"""
A function that can be used as a factory for L{ReactorBuilder} tests but
which always raises an exception.
This gives the appearance of a reactor type which is unsupported in the
current runtime configuration for some reason.
"""
raise Exception(UNSUPPORTED)
class ReactorBuilderTests(SynchronousTestCase):
"""
Tests for L{ReactorBuilder}.
"""
def test_buildReactorFails(self) -> None:
"""
If the reactor factory raises any exception then
L{ReactorBuilder.buildReactor} raises L{SkipTest}.
"""
class BrokenReactorFactory(ReactorBuilder, SynchronousTestCase):
_reactors = [
"twisted.internet.test.test_reactormixins.unsupportedReactor",
]
def test_brokenFactory(self) -> None:
"""
Try, and fail, to build an unsupported reactor.
"""
self.buildReactor()
cases = BrokenReactorFactory.makeTestCaseClasses().values()
loader = TestLoader()
suite = TestSuite(loader.loadClass(cls) for cls in cases)
result = TestResult()
suite.run(result)
assert_that(result, matches_result(skips=has_length(1)))
[(_, skip)] = result.skips
assert_that(skip, equal_to(UNSUPPORTED))
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