def test_clear_nonempty(self):
"""Clear a nonempty bimap."""
bimap = BiMap({1: "first", 2: "second"})
bimap.clear()
self.assertEqual(0, len(bimap))
def test_clear_empty(self):
"""Clear an empty bimap."""
bimap = BiMap()
bimap.clear()
self.assertEqual(0, len(bimap))