Mini Shell

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Direct unit tests for L{twisted.trial.unittest.SynchronousTestCase} and
L{twisted.trial.unittest.TestCase}.
"""


from twisted.trial.unittest import SynchronousTestCase, TestCase


class TestCaseMixin:
    """
    L{TestCase} tests.
    """

    def setUp(self):
        """
        Create a couple instances of C{MyTestCase}, each for the same test
        method, to be used in the test methods of this class.
        """
        self.first = self.MyTestCase("test_1")
        self.second = self.MyTestCase("test_1")

    def test_equality(self):
        """
        In order for one test method to be runnable twice, two TestCase
        instances with the same test method name must not compare as equal.
        """
        self.assertTrue(self.first == self.first)
        self.assertTrue(self.first != self.second)
        self.assertFalse(self.first == self.second)

    def test_hashability(self):
        """
        In order for one test method to be runnable twice, two TestCase
        instances with the same test method name should not have the same
        hash value.
        """
        container = {}
        container[self.first] = None
        container[self.second] = None
        self.assertEqual(len(container), 2)


class SynchronousTestCaseTests(TestCaseMixin, SynchronousTestCase):
    class MyTestCase(SynchronousTestCase):
        """
        Some test methods which can be used to test behaviors of
        L{SynchronousTestCase}.
        """

        def test_1(self):
            pass


# Yes, subclass SynchronousTestCase again.  There are no interesting behaviors
# of self being tested below, only of self.MyTestCase.
class AsynchronousTestCaseTests(TestCaseMixin, SynchronousTestCase):
    class MyTestCase(TestCase):
        """
        Some test methods which can be used to test behaviors of
        L{TestCase}.
        """

        def test_1(self):
            pass