def test_lighten(self):
c = HSL(10, 0.2, 0.2, 0.2)
c2 = c.lighten(0.2)
assert c2 is not c
assert c2.a == 0.2
assert c2.h == 10
assert c2.s == 0.2
assert c2.l == 0.4
c2 = c.lighten(1.2)
assert c2 is not c
assert c2.a == 0.2
assert c2.h == 10
assert c2.s == 0.2
assert c2.l == 1.0
def test_darken(self):
c = HSL(10, 0.2, 0.2, 0.2)
c2 = c.darken(0.1)
assert c2 is not c
assert c2.a == 0.2
assert c2.h == 10
assert c2.s == 0.2
assert c2.l == 0.1
c2 = c.darken(0.3)
assert c2 is not c
assert c2.a == 0.2
assert c2.h == 10
assert c2.s == 0.2
assert c2.l == 0