Current File : //lib/python3/dist-packages/twisted/trial/test/test_pyunitcompat.py
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from __future__ import annotations
import sys
import traceback
import unittest as pyunit
from unittest import skipIf
from zope.interface import implementer
from twisted.python.failure import Failure
from twisted.trial.itrial import IReporter, ITestCase
from twisted.trial.test import pyunitcases
from twisted.trial.unittest import PyUnitResultAdapter, SynchronousTestCase
class PyUnitTestTests(SynchronousTestCase):
def setUp(self) -> None:
self.original = pyunitcases.PyUnitTest("test_pass")
self.test = ITestCase(self.original)
def test_callable(self) -> None:
"""
Tests must be callable in order to be used with Python's unittest.py.
"""
self.assertTrue(callable(self.test), f"{self.test!r} is not callable.")
class PyUnitResultTests(SynchronousTestCase):
"""
Tests to show that PyUnitResultAdapter wraps TestResult objects from the
standard library 'unittest' module in such a way as to make them usable and
useful from Trial.
"""
# Once erroneous is ported to Python 3 this can be replaced with
# erroneous.ErrorTest:
class ErrorTest(SynchronousTestCase):
"""
A test case which has a L{test_foo} which will raise an error.
@ivar ran: boolean indicating whether L{test_foo} has been run.
"""
ran = False
def test_foo(self) -> None:
"""
Set C{self.ran} to True and raise a C{ZeroDivisionError}
"""
self.ran = True
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def test_dontUseAdapterWhenReporterProvidesIReporter(self) -> None:
"""
The L{PyUnitResultAdapter} is only used when the result passed to
C{run} does *not* provide L{IReporter}.
"""
@implementer(IReporter)
class StubReporter: # type: ignore[misc]
"""
A reporter which records data about calls made to it.
@ivar errors: Errors passed to L{addError}.
@ivar failures: Failures passed to L{addFailure}.
"""
def __init__(self) -> None:
self.errors: list[Failure] = []
self.failures: list[None] = []
def startTest(self, test: object) -> None:
"""
Do nothing.
"""
def stopTest(self, test: object) -> None:
"""
Do nothing.
"""
def addError(self, test: object, error: Failure) -> None:
"""
Record the error.
"""
self.errors.append(error)
test = self.ErrorTest("test_foo")
result = StubReporter()
test.run(result)
self.assertIsInstance(result.errors[0], Failure)
def test_success(self) -> None:
class SuccessTest(SynchronousTestCase):
ran = False
def test_foo(s) -> None:
s.ran = True
test = SuccessTest("test_foo")
result = pyunit.TestResult()
test.run(result)
self.assertTrue(test.ran)
self.assertEqual(1, result.testsRun)
self.assertTrue(result.wasSuccessful())
def test_failure(self) -> None:
class FailureTest(SynchronousTestCase):
ran = False
def test_foo(s) -> None:
s.ran = True
s.fail("boom!")
test = FailureTest("test_foo")
result = pyunit.TestResult()
test.run(result)
self.assertTrue(test.ran)
self.assertEqual(1, result.testsRun)
self.assertEqual(1, len(result.failures))
self.assertFalse(result.wasSuccessful())
def test_error(self) -> None:
test = self.ErrorTest("test_foo")
result = pyunit.TestResult()
test.run(result)
self.assertTrue(test.ran)
self.assertEqual(1, result.testsRun)
self.assertEqual(1, len(result.errors))
self.assertFalse(result.wasSuccessful())
def test_setUpError(self) -> None:
class ErrorTest(SynchronousTestCase):
ran = False
def setUp(self) -> None:
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def test_foo(s) -> None:
s.ran = True
test = ErrorTest("test_foo")
result = pyunit.TestResult()
test.run(result)
self.assertFalse(test.ran)
self.assertEqual(1, result.testsRun)
self.assertEqual(1, len(result.errors))
self.assertFalse(result.wasSuccessful())
def test_tracebackFromFailure(self) -> None:
"""
Errors added through the L{PyUnitResultAdapter} have the same traceback
information as if there were no adapter at all.
"""
try:
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except ZeroDivisionError:
exc_info = sys.exc_info()
f = Failure()
pyresult = pyunit.TestResult()
result = PyUnitResultAdapter(pyresult)
result.addError(self, f)
self.assertEqual(
pyresult.errors[0][1], "".join(traceback.format_exception(*exc_info))
)
def test_traceback(self) -> None:
"""
As test_tracebackFromFailure, but covering more code.
"""
class ErrorTest(SynchronousTestCase):
exc_info = None
def test_foo(self) -> None:
try:
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except ZeroDivisionError:
self.exc_info = sys.exc_info()
raise
test = ErrorTest("test_foo")
result = pyunit.TestResult()
test.run(result)
# We can't test that the tracebacks are equal, because Trial's
# machinery inserts a few extra frames on the top and we don't really
# want to trim them off without an extremely good reason.
#
# So, we just test that the result's stack ends with the
# exception's stack.
assert test.exc_info is not None
expected_stack = "".join(traceback.format_tb(test.exc_info[2]))
observed_stack = "\n".join(result.errors[0][1].splitlines()[:-1])
self.assertEqual(
expected_stack.strip(), observed_stack[-len(expected_stack) :].strip()
)
def test_tracebackFromCleanFailure(self) -> None:
"""
Errors added through the L{PyUnitResultAdapter} have the same
traceback information as if there were no adapter at all, even
if the Failure that held the information has been cleaned.
"""
try:
1 / 0
except ZeroDivisionError:
exc_info = sys.exc_info()
f = Failure()
f.cleanFailure()
pyresult = pyunit.TestResult()
result = PyUnitResultAdapter(pyresult)
result.addError(self, f)
tback = "".join(traceback.format_exception(*exc_info))
self.assertEqual(
pyresult.errors[0][1].endswith("ZeroDivisionError: division by zero\n"),
tback.endswith("ZeroDivisionError: division by zero\n"),
)
def test_trialSkip(self) -> None:
"""
Skips using trial's skipping functionality are reported as skips in
the L{pyunit.TestResult}.
"""
class SkipTest(SynchronousTestCase):
@skipIf(True, "Let's skip!")
def test_skip(self) -> None:
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test = SkipTest("test_skip")
result = pyunit.TestResult()
test.run(result)
self.assertEqual(result.skipped, [(test, "Let's skip!")])
def test_pyunitSkip(self) -> None:
"""
Skips using pyunit's skipping functionality are reported as skips in
the L{pyunit.TestResult}.
"""
class SkipTest(SynchronousTestCase):
@pyunit.skip("skippy")
def test_skip(self) -> None:
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test = SkipTest("test_skip")
result = pyunit.TestResult()
test.run(result)
self.assertEqual(result.skipped, [(test, "skippy")])
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