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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for returning Deferreds from a TestCase.
"""
from __future__ import annotations
import unittest as pyunit
from twisted.internet import defer
from twisted.python.failure import Failure
from twisted.trial import reporter, unittest, util
from twisted.trial.test import detests
class SetUpTests(unittest.TestCase):
def _loadSuite(
self, klass: type[pyunit.TestCase]
) -> tuple[reporter.TestResult, pyunit.TestSuite]:
loader = pyunit.TestLoader()
r = reporter.TestResult()
s = loader.loadTestsFromTestCase(klass)
return r, s
def test_success(self) -> None:
result, suite = self._loadSuite(detests.DeferredSetUpOK)
suite(result)
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
def test_fail(self) -> None:
self.assertFalse(detests.DeferredSetUpFail.testCalled)
result, suite = self._loadSuite(detests.DeferredSetUpFail)
suite(result)
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.errors), 1)
self.assertFalse(detests.DeferredSetUpFail.testCalled)
def test_callbackFail(self) -> None:
self.assertFalse(detests.DeferredSetUpCallbackFail.testCalled)
result, suite = self._loadSuite(detests.DeferredSetUpCallbackFail)
suite(result)
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.errors), 1)
self.assertFalse(detests.DeferredSetUpCallbackFail.testCalled)
def test_error(self) -> None:
self.assertFalse(detests.DeferredSetUpError.testCalled)
result, suite = self._loadSuite(detests.DeferredSetUpError)
suite(result)
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.errors), 1)
self.assertFalse(detests.DeferredSetUpError.testCalled)
def test_skip(self) -> None:
self.assertFalse(detests.DeferredSetUpSkip.testCalled)
result, suite = self._loadSuite(detests.DeferredSetUpSkip)
suite(result)
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.errors), 0)
self.assertEqual(len(result.skips), 1)
self.assertFalse(detests.DeferredSetUpSkip.testCalled)
class NeverFireTests(unittest.TestCase):
def setUp(self) -> None:
self._oldTimeout = util.DEFAULT_TIMEOUT_DURATION
util.DEFAULT_TIMEOUT_DURATION = 0.1
def tearDown(self) -> None:
util.DEFAULT_TIMEOUT_DURATION = self._oldTimeout
def _loadSuite(
self, klass: type[pyunit.TestCase]
) -> tuple[reporter.TestResult, pyunit.TestSuite]:
loader = pyunit.TestLoader()
r = reporter.TestResult()
s = loader.loadTestsFromTestCase(klass)
return r, s
def test_setUp(self) -> None:
self.assertFalse(detests.DeferredSetUpNeverFire.testCalled)
result, suite = self._loadSuite(detests.DeferredSetUpNeverFire)
suite(result)
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.errors), 1)
self.assertFalse(detests.DeferredSetUpNeverFire.testCalled)
assert isinstance(result.errors[0][1], Failure)
self.assertTrue(result.errors[0][1].check(defer.TimeoutError))
class TestTester(unittest.TestCase):
def getTest(self, name: str) -> pyunit.TestCase:
raise NotImplementedError("must override me")
def runTest(self, name: str) -> reporter.TestResult: # type: ignore[override]
result = reporter.TestResult()
self.getTest(name).run(result)
return result
class DeferredTests(TestTester):
def getTest(self, name: str) -> detests.DeferredTests:
return detests.DeferredTests(name)
def test_pass(self) -> None:
result = self.runTest("test_pass")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
def test_passGenerated(self) -> None:
result = self.runTest("test_passGenerated")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertTrue(detests.DeferredTests.touched)
test_passGenerated.supress = [ # type: ignore[attr-defined]
util.suppress(message="twisted.internet.defer.deferredGenerator is deprecated")
]
def test_passInlineCallbacks(self) -> None:
"""
The body of a L{defer.inlineCallbacks} decorated test gets run.
"""
result = self.runTest("test_passInlineCallbacks")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertTrue(detests.DeferredTests.touched)
def test_fail(self) -> None:
result = self.runTest("test_fail")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 1)
def test_failureInCallback(self) -> None:
result = self.runTest("test_failureInCallback")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.failures), 1)
def test_errorInCallback(self) -> None:
result = self.runTest("test_errorInCallback")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.errors), 1)
def test_skip(self) -> None:
result = self.runTest("test_skip")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.skips), 1)
self.assertFalse(detests.DeferredTests.touched)
def test_todo(self) -> None:
result = self.runTest("test_expectedFailure")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.errors), 0)
self.assertEqual(len(result.failures), 0)
self.assertEqual(len(result.expectedFailures), 1)
def test_thread(self) -> None:
result = self.runTest("test_thread")
self.assertEqual(result.testsRun, 1)
self.assertTrue(result.wasSuccessful(), result.errors)
class TimeoutTests(TestTester):
def getTest(self, name: str) -> detests.TimeoutTests:
return detests.TimeoutTests(name)
def _wasTimeout(self, error: Failure) -> None:
self.assertEqual(error.check(defer.TimeoutError), defer.TimeoutError)
def test_pass(self) -> None:
result = self.runTest("test_pass")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
def test_passDefault(self) -> None:
result = self.runTest("test_passDefault")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
def test_timeout(self) -> None:
result = self.runTest("test_timeout")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.errors), 1)
assert isinstance(result.errors[0][1], Failure)
self._wasTimeout(result.errors[0][1])
def test_timeoutZero(self) -> None:
result = self.runTest("test_timeoutZero")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.errors), 1)
assert isinstance(result.errors[0][1], Failure)
self._wasTimeout(result.errors[0][1])
def test_skip(self) -> None:
result = self.runTest("test_skip")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.skips), 1)
def test_todo(self) -> None:
result = self.runTest("test_expectedFailure")
self.assertTrue(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
self.assertEqual(len(result.expectedFailures), 1)
assert isinstance(result.expectedFailures[0][1], Failure)
self._wasTimeout(result.expectedFailures[0][1])
def test_errorPropagation(self) -> None:
result = self.runTest("test_errorPropagation")
self.assertFalse(result.wasSuccessful())
self.assertEqual(result.testsRun, 1)
assert detests.TimeoutTests.timedOut is not None
self._wasTimeout(detests.TimeoutTests.timedOut)
def test_classTimeout(self) -> None:
loader = pyunit.TestLoader()
suite = loader.loadTestsFromTestCase(detests.TestClassTimeoutAttribute)
result = reporter.TestResult()
suite.run(result)
self.assertEqual(len(result.errors), 1)
assert isinstance(result.errors[0][1], Failure)
self._wasTimeout(result.errors[0][1])
def test_callbackReturnsNonCallingDeferred(self) -> None:
# hacky timeout
# raises KeyboardInterrupt because Trial sucks
from twisted.internet import reactor
call = reactor.callLater(2, reactor.crash) # type: ignore[attr-defined]
result = self.runTest("test_calledButNeverCallback")
if call.active():
call.cancel()
self.assertFalse(result.wasSuccessful())
assert isinstance(result.errors[0][1], Failure)
self._wasTimeout(result.errors[0][1])
# The test loader erroneously attempts to run this:
del TestTester
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