def testHiddenHierarchyLookup(self):
base = Environment()
head = Environment(base)
base.put("key", "value1");
head.put("key", "value2");
self.assertEqual("value1", base.get("key"))
self.assertEqual("value2", head.get("key"))
def testSimpleLookup(self):
head = Environment()
head.put("key", "value");
self.assertEqual("value", head.get("key"))