def test_creation_hz(self):
obs = Observer(hz=60)
self.assertEqual(obs.hz(), 60)
ref = weakref.ref(obs)
del obs
self.assertIsNone(ref())
def test_creation_inf(self):
obs = Observer(hz="inf")
self.assertEqual(obs.hz(), float("inf"))
ref = weakref.ref(obs)
del obs
self.assertIsNone(ref())
def test_creation_None(self):
obs = Observer(hz=None)
self.assertIsNone(obs.hz())
ref = weakref.ref(obs)
del obs
self.assertIsNone(ref())
