def test_singleton_raises_error_on_multiple_instantiations(self):
instance_a = Singleton.singleton()
with self.assertRaises(
SingletonError,
msg='Instantiating more than once should raise an error.'):
instance_b = Singleton()
def test_singletons_can_be_reset(self):
instance_a = Singleton.singleton()
Singleton.reset_singleton()
instance_b = Singleton.singleton()
self.assertTrue(instance_a is not instance_b,
'Singleton.singleton() should return a different instance after reset.')
def test_singletons_can_be_reset(self):
instance_a = Singleton.singleton()
Singleton.reset_singleton()
instance_b = Singleton.singleton()
self.assertTrue(
instance_a is not instance_b,
'Singleton.singleton() should return a different instance after reset.'
)
def test_singleton_returns_same_instance_every_time(self):
instance_a = Singleton.singleton()
instance_b = Singleton.singleton()
self.assertIs(
instance_a, instance_b,
'Singleton.singleton() should return the same instance.')
def test_singleton_returns_same_instance_every_time(self):
instance_a = Singleton.singleton()
instance_b = Singleton.singleton()
self.assertIs(instance_a, instance_b, 'Singleton.singleton() should return the same instance.')
def test_singleton_raises_error_on_multiple_instantiations(self):
instance_a = Singleton.singleton()
with self.assertRaises(SingletonError, msg='Instantiating more than once should raise an error.'):
instance_b = Singleton()