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name : suppression.py
 # -*- test-case-name: twisted.trial.test.test_tests -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Test cases used to make sure that warning suppression works at the module,
method, and class levels.

See the L{twisted.trial.test.test_tests} module docstring for details about how
this code is arranged.
"""


import warnings

from twisted.trial import unittest, util

METHOD_WARNING_MSG = "method warning message"
CLASS_WARNING_MSG = "class warning message"
MODULE_WARNING_MSG = "module warning message"


class MethodWarning(Warning):
    pass


class ClassWarning(Warning):
    pass


class ModuleWarning(Warning):
    pass


class EmitMixin:
    """
    Mixin for emiting a variety of warnings.
    """

    def _emit(self):
        warnings.warn(METHOD_WARNING_MSG, MethodWarning)
        warnings.warn(CLASS_WARNING_MSG, ClassWarning)
        warnings.warn(MODULE_WARNING_MSG, ModuleWarning)


class SuppressionMixin(EmitMixin):
    suppress = [util.suppress(message=CLASS_WARNING_MSG)]

    def testSuppressMethod(self):
        self._emit()

    testSuppressMethod.suppress = [util.suppress(message=METHOD_WARNING_MSG)]  # type: ignore[attr-defined]

    def testSuppressClass(self):
        self._emit()

    def testOverrideSuppressClass(self):
        self._emit()

    testOverrideSuppressClass.suppress = []  # type: ignore[attr-defined]


class SetUpSuppressionMixin:
    def setUp(self):
        self._emit()


class TearDownSuppressionMixin:
    def tearDown(self):
        self._emit()


class TestSuppression2Mixin(EmitMixin):
    def testSuppressModule(self):
        self._emit()


suppress = [util.suppress(message=MODULE_WARNING_MSG)]


class SynchronousTestSuppression(SuppressionMixin, unittest.SynchronousTestCase):
    pass


class SynchronousTestSetUpSuppression(
    SetUpSuppressionMixin, SynchronousTestSuppression
):
    pass


class SynchronousTestTearDownSuppression(
    TearDownSuppressionMixin, SynchronousTestSuppression
):
    pass


class SynchronousTestSuppression2(TestSuppression2Mixin, unittest.SynchronousTestCase):
    pass


class AsynchronousTestSuppression(SuppressionMixin, unittest.TestCase):
    pass


class AsynchronousTestSetUpSuppression(
    SetUpSuppressionMixin, AsynchronousTestSuppression
):
    pass


class AsynchronousTestTearDownSuppression(
    TearDownSuppressionMixin, AsynchronousTestSuppression
):
    pass


class AsynchronousTestSuppression2(TestSuppression2Mixin, unittest.TestCase):
    pass
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