def test_dotdict_merge():
a = DotDict()
b = {1: {2: 2, 3: 3, 4: {5: "fin."}}}
a.update(b)
assert a == b
b[1][2] = 5
assert a != b
a.update({1: {4: {5: "new.", 6: "fin."}, 2: "x"}})
assert a == {1: {2: "x", 3: 3, 4: {5: "new.", 6: "fin."}}}
def test_dotdict_keeptype():
a = DotDict()
a.update({"nr": {"upper": 1}})
assert a.nr.upper == 1
assert "{nr.upper}".format(**a) == "1"