def test_s(self):
"""Get/set s co-ordinate."""
q = Quaternion(2.5, 6.7, -4.6, 1.0)
# get x attribute
self.assertEqual(q.s, 1.0, 'Getting s attribute failed.')
# set x attribute
q.s = 10.0
self.assertEqual(q.s, 10.0, 'Setting s attribute failed.')
def test_copy(self):
"""Testing method copy()"""
q = Quaternion(1, 2, 3, 4)
r = q.copy()
# check a new instance has been created by modifying the original
q.x = 5.0
q.y = 6.0
q.z = 7.0
q.s = 8.0
self.assertEqual(r.x, 1.0, 'Copy failed [X].')
self.assertEqual(r.y, 2.0, 'Copy failed [Y].')
self.assertEqual(r.z, 3.0, 'Copy failed [Z].')
self.assertEqual(r.s, 4.0, 'Copy failed [S].')