def test_should_revert_state_after_pop(self):
canvas = Canvas()
set_state(canvas, STATE_1)
canvas.push_state()
set_state(canvas, STATE_2)
canvas.pop_state()
assert_same(self, STATE_1, get_state(canvas))
def test_should_apply_old_state_after_pop(self, mock_stroke_apply,
mock_fill_apply):
# given
canvas = Canvas()
set_state(canvas, STATE_1)
canvas.push_state()
set_state(canvas, STATE_2)
# when
canvas.pop_state()
# then
self.assertTrue(mock_stroke_apply.called)
self.assertTrue(mock_fill_apply.called)
def test_should_not_pop_state_from_empty_stack(self):
canvas = Canvas()
canvas.pop_state()
