def test_nested(self):
root = ConstantEnv()
child = ConstantEnv("Foo", root)
child.define(None, "Bar", 7)
self.assertEqual(child.lookup_value(None, "Bar"), 7)
self.assertEqual(root.lookup_value(None, "Foo.Bar"), 7)
def test_empty(self):
e = ConstantEnv()
with self.assertRaises(TypeSystemException):
e.lookup_value(None, "a")
def test_simple(self):
e = ConstantEnv()
e.define(None, "foo", 7)
self.assertEqual(e.lookup_value(None, "foo"), 7)
