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_value():
sut = Scalar(7)
sut.max = 4
assert sut.value == 4
assert sut.max == 4
def test_set_min__higher_than_value():
sut = Scalar(5, max=10)
sut.min = 7
assert sut.value == 7
assert sut.min == 7
def test_set_min__normal():
sut = Scalar(9)
sut.min = 3
assert sut.value == 9
assert sut.min == 3
def test_fraction__full_and_changed():
sut = Scalar(7, max=10)
assert sut.fraction == 0.7
sut.value = 10
assert sut.fraction == 1.0
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
def test_set_min__higher_than_max():
sut = Scalar(5)
try:
sut.min = 7
except ValueError as err:
assert err.message == "min must be <= max"
else:
assert False
def test_set_value__normal():
sut = Scalar(8)
sut.value = 5
assert sut.value == 5
def test_set_value__too_high():
sut = Scalar(6)
sut.value = 9
assert sut.value == 6
def test_set_value__too_low():
sut = Scalar(4)
sut.value = -3.5
assert sut.value == 0