52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
from unittest import TestCase
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from pypatterns.creational.singleton import Singleton
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from tests.utils.dummy import dummy_class_factory
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class SingletonTestCase(TestCase):
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"""
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Unit testing class for the singleton design pattern.
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"""
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def setUp(self):
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"""
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Initialize testing data.
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"""
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self.dummy_class_one = dummy_class_factory(meta_class=Singleton,
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attributes={},
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functions={})
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self.dummy_class_two = dummy_class_factory(meta_class=Singleton,
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attributes={},
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functions={})
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def test_single(self):
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"""
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Test instances from a single singleton class.
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@raise AssertionError: If the test fails.
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"""
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dummy_one = self.dummy_class_one()
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dummy_two = self.dummy_class_one()
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self.assertEquals(id(dummy_one), id(dummy_two))
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def test_multiple(self):
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"""
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Test instances from multiple singleton classes.
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@raise AssertionError: If the test fails.
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"""
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dummy_class_one_instance_one = self.dummy_class_one()
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dummy_class_one_instance_two = self.dummy_class_one()
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dummy_class_two_instance_one = self.dummy_class_two()
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dummy_class_two_instance_two = self.dummy_class_two()
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self.assertEquals(id(dummy_class_one_instance_one), id(dummy_class_one_instance_two))
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self.assertEquals(id(dummy_class_two_instance_one), id(dummy_class_two_instance_two))
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self.assertNotEquals(id(dummy_class_one_instance_one), id(dummy_class_two_instance_one))
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self.assertNotEquals(id(dummy_class_one_instance_two), id(dummy_class_two_instance_two))
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