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_make_deep_copies_on_push(self):
canvas = Canvas()
old_stroke = id(canvas.stroke)
old_fill = id(canvas.fill)
old_font = id(canvas.font)
canvas.push_state()
new_stroke = id(canvas.stroke)
new_fill = id(canvas.fill)
new_font = id(canvas.font)
self.assertNotEqual(old_stroke, new_stroke)
self.assertNotEqual(old_fill, new_fill)
self.assertNotEqual(old_font, new_font)
def test_should_retain_same_state_after_push(self, mock_stroke_apply,
mock_fill_apply):
canvas = Canvas()
canvas.push_state()
self.assertTrue(mock_stroke_apply.called)
self.assertTrue(mock_fill_apply.called)