def test_no_scaling_factor(self, model2):
model2.scaling_factor = pyo.Suffix(direction=pyo.Suffix.EXPORT)
sc.scale_single_constraint(model2.c)
assert model2.c.upper.value == pytest.approx(1e3)
def test_scaling_factor_and_expression_replacement(self, model):
model.c4 = pyo.Constraint(expr=model.x <= 1e6)
model.scaling_factor[model.c4] = 1e-6
sc.scale_single_constraint(model.c4)
assert model.c4.upper.value == pytest.approx(1)
assert model.c4 not in model.scaling_factor
def test_greater_than_constraint(self, model):
sc.scale_single_constraint(model.c3)
assert model.c3.lower.value == pytest.approx(1)
assert model.c3.body() == pytest.approx(model.x.value / 1e3)
assert model.c3.upper is None
def test_equality_constraint(self, model):
sc.scale_single_constraint(model.c2)
assert model.c2.lower.value == pytest.approx(1)
assert model.c2.body() == pytest.approx(model.x.value / 1e3)
assert model.c2.upper.value == pytest.approx(1)
def test_less_than_constraint(self, model):
sc.scale_single_constraint(model.c1)
assert model.c1.lower is None
assert model.c1.body() == pytest.approx(model.x.value / 1e3)
assert model.c1.upper.value == pytest.approx(1)
def test_not_constraint(self, model):
with pytest.raises(TypeError):
sc.scale_single_constraint(model.x)
