def test_stack_settings(self):
"""test settings aggregation"""
kv1 = KeyValueStoreModifier({'one': {'one': 1,
'two': 2},
'two': 2})
stack = ContextStack()
ctx = Context('first')
ctx.set_settings(kv1)
stack.push(ctx)
kv2 = KeyValueStoreModifier({'one': {'one': '1',
'three': 3},
'two': {'one': 1, 'foo': 2},
'three': 3})
assert stack.settings().data().to_dict() == kv1.data()
ctx = Context('second')
ctx.set_settings(kv2)
stack.push(ctx)
kvd = stack.settings().data()
assert kvd.one.one == '1'
assert kvd.one.three == 3
assert kvd.one.two == 2
assert kvd.three == 3
assert kvd.two.one == 1
# popping the previous context should bring the original one back
stack.pop()
kvd = stack.settings().data()
assert kvd.to_dict() == kv1.data()
