def test_transformation(self):
'It test the transformation between fragments'
coord = CoordSystem(relations=[])
assert coord._transform_pos((1, 10), (2, 11), 2) == 3
assert coord._transform_pos((1, 10), (11, 2), 2) == 10
assert coord._transform_pos((0, 12), (16, 4), 2) == 14
#if we deal with CodonPosition we get the right answer and type
result = coord._transform_pos((2, 7), (CodonPosition(2, 1),
CodonPosition(4, 0)), 4)
expected = CodonPosition(3, 0)
assert result == expected
assert type(result) == type(expected)
result = coord._transform_pos((CodonPosition(2, 1),
CodonPosition(4, 0)),
(2, 7), CodonPosition(3, 1))
expected = 5
assert result == expected
assert type(result) == type(expected)
result = coord._transform_pos((CodonPosition(4, 0),
CodonPosition(2, 1)),
(2, 7), CodonPosition(3, 2))
expected = 3
assert result == expected
assert type(result) == type(expected)
