def test_set_max__lower_than_value():
sut = Scalar(7)
sut.max = 4
assert sut.value == 4
assert sut.max == 4
def test_set_max__normal():
sut = Scalar(4)
sut.max = 7
assert sut.value == 4
assert sut.max == 7
def test_set_max__lower_than_min():
sut = Scalar(5)
try:
sut.max = -2
except ValueError as err:
assert err.message == 'max must be >= min'
else:
assert False
