def test_east_to_west():
assert marstime.west_to_east(0.0) == marstime.east_to_west(0.0)
def test_west_to_east():
assert marstime.west_to_east(360.0) == 0.0 #0.271
assert marstime.west_to_east(540.0) == marstime.west_to_east(180.0)
