def test_get_correct_width_wrong_raw_str():
ctx = Context()
ctx.image_width_str = 'x9pm'
with pytest.raises(ValueError) as exc:
image._get_correct_width(ctx)
assert 'x9pm' in exc
def test_get_correct_width_wrong_unit():
ctx = Context()
ctx.image_width_str = '9pm'
ctx.image_max_width = 300
with pytest.raises(ValueError):
image._get_correct_width(ctx)
def test_shrink():
ctx = Context()
ctx.image_width_str = '50cm'
ctx.image_max_width = 20
image._get_correct_width(ctx)
assert ctx.image_width == 20
def test_get_correct_width(width_str):
ctx = Context()
ctx.image_width_str = width_str
ctx.image_max_width = 300
image._get_correct_width(ctx)
assert ctx.image_width <= 300