def test_setdefault(self):
cmap = ComponentMap()
for c,_ in self._components:
with self.assertRaises(KeyError):
cmap[c]
self.assertTrue(c not in cmap)
cmap.setdefault(c, []).append(1)
self.assertEqual(cmap[c], [1])
del cmap[c]
with self.assertRaises(KeyError):
cmap[c]
self.assertTrue(c not in cmap)
cmap[c] = []
cmap.setdefault(c, []).append(1)
self.assertEqual(cmap[c], [1])
