def test_lsb_set_wrong(self):
"""Test of setting wrong value to 'lsb' attribute of a bit field."""
bf = BitField('bf_a')
with pytest.raises(ValueError):
bf.lsb = -1
def test_lsb_access(self):
"""Test of accessing to 'lsb' attribute of a bit field."""
bf = BitField('bf_a')
bf.lsb = 3
assert bf.lsb == 3