def test_from_index_error(self):
for i in [-1, MAX_BELL, MAX_BELL + 1, 100, -1100]:
with self.assertRaises(ValueError):
Bell.from_index(i)
# This should be disallowed by the type checker, but may as well test that it does fail
with self.assertRaises(TypeError):
Bell.from_index(None)
def test_equality(self):
for i in range(MAX_BELL):
for j in range(MAX_BELL):
# Bells with indices `i` and `j` should be equal precisely when `i == j`
self.assertEqual(Bell.from_index(i) == Bell.from_index(j), i == j)
# Bells with indices `i` and `j` should be not equal precisely when `i != j`
self.assertEqual(Bell.from_index(i) != Bell.from_index(j), i != j)
def test_from_index_success(self):
for i in range(MAX_BELL):
self.assertEqual(Bell.from_index(i).index, i)