def test_push_pop(self):
config = Config({'x': 1, 'y': 2})
compare(config.x, expected=1)
compare(config.y, expected=2)
config.push(Config({'x': 3}))
compare(config.x, expected=3)
compare(config.y, expected=2)
config.pop()
compare(config.x, expected=1)
compare(config.y, expected=2)
def test_push_empty(self):
config = Config({'x': 1, 'y': 2})
compare(config.x, expected=1)
compare(config.y, expected=2)
config.push(Config({'x': 3}), empty=True)
compare(config.x, expected=3)
with ShouldRaise(AttributeError('y')):
config.y
config.pop()
compare(config.x, expected=1)
compare(config.y, expected=2)
def test_pop_without_push(self):
config = Config({'x': 1, 'y': 2})
with ShouldRaise(IndexError('pop from empty list')):
config.pop()
