def testcreate_singleton(self):
s1 = self.s1
s2 = self.s2
s1.foo = 1
s2.foo = 2
s3 = Singleton('s1')
self.assertNotEqual(s1.foo, s2.foo)
self.assertEqual(s1.foo, s3.foo)
s3.__del_instance__('s1')
s4 = Singleton('s1')
self.assertRaises(AttributeError, getattr, s4, 'foo')
error_singleton = type('newsingleton', (Singleton, ),
{'__init__': lambda self: None})
self.assertRaises(TypeError, error_singleton, 's1')
newsingleton = type('newsingleton', (Singleton, ), {})
ns = newsingleton('s2')
self.assertEquals(ns._instance_name, 's2')
self.assertRaises(AttributeError, getattr, ns, 'foo')
def test_num_instances(self):
self.assertEquals(Singleton._num_instances(), 2)
Singleton.__del_instance__('s1')
self.assertEquals(Singleton._num_instances(), 1)
def tearDown(self):
Singleton.__del_instance__('s1')
Singleton.__del_instance__('s2')
self.assertEquals(Singleton._num_instances(), 0)