def METHOD_NAME(self):
    s = Settings({
        "perm_gen": "aaa",
        "heap_dump": "bbb",
        "heap_size": "ccc",
        }, {
        "perm_gen": "xxx",
        "heap_dump": "yyy",
        "heap_size": "zzz",
        })
    assert s.perm_gen == "aaa"
    assert s.heap_dump == "bbb"
    assert s.heap_size == "ccc"