Current File : //lib/python3/dist-packages/twisted/internet/test/test_glibbase.py
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for twisted.internet.glibbase.
"""
import sys
from twisted.internet._glibbase import ensureNotImported
from twisted.trial.unittest import TestCase
class EnsureNotImportedTests(TestCase):
"""
L{ensureNotImported} protects against unwanted past and future imports.
"""
def test_ensureWhenNotImported(self):
"""
If the specified modules have never been imported, and import
prevention is requested, L{ensureNotImported} makes sure they will not
be imported in the future.
"""
modules = {}
self.patch(sys, "modules", modules)
ensureNotImported(["m1", "m2"], "A message.", preventImports=["m1", "m2", "m3"])
self.assertEqual(modules, {"m1": None, "m2": None, "m3": None})
def test_ensureWhenNotImportedDontPrevent(self):
"""
If the specified modules have never been imported, and import
prevention is not requested, L{ensureNotImported} has no effect.
"""
modules = {}
self.patch(sys, "modules", modules)
ensureNotImported(["m1", "m2"], "A message.")
self.assertEqual(modules, {})
def test_ensureWhenFailedToImport(self):
"""
If the specified modules have been set to L{None} in C{sys.modules},
L{ensureNotImported} does not complain.
"""
modules = {"m2": None}
self.patch(sys, "modules", modules)
ensureNotImported(["m1", "m2"], "A message.", preventImports=["m1", "m2"])
self.assertEqual(modules, {"m1": None, "m2": None})
def test_ensureFailsWhenImported(self):
"""
If one of the specified modules has been previously imported,
L{ensureNotImported} raises an exception.
"""
module = object()
modules = {"m2": module}
self.patch(sys, "modules", modules)
e = self.assertRaises(
ImportError,
ensureNotImported,
["m1", "m2"],
"A message.",
preventImports=["m1", "m2"],
)
self.assertEqual(modules, {"m2": module})
self.assertEqual(e.args, ("A message.",))
try:
from twisted.internet import gireactor as _gireactor
except ImportError:
gireactor = None
else:
gireactor = _gireactor
missingGlibReactor = None
if gireactor is None:
missingGlibReactor = "gi reactor not available"
class GlibReactorBaseTests(TestCase):
"""
Tests for the private C{twisted.internet._glibbase.GlibReactorBase}
done via the public C{twisted.internet.gireactor.PortableGIReactor}
"""
skip = missingGlibReactor
def test_simulate(self):
"""
C{simulate} can be called without raising any errors when there are
no delayed calls for the reactor and hence there is no defined sleep
period.
"""
sut = gireactor.PortableGIReactor(useGtk=False)
# Double check that reactor has no sleep period.
self.assertIs(None, sut.timeout())
sut.simulate()
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