def METHOD_NAME(self, model):
    assert isinstance(model.fs.unit.properties_in1, WaterStateBlock)
    assert isinstance(model.fs.unit.properties_in2, WaterStateBlock)
    assert isinstance(model.fs.unit.properties_treated, WaterStateBlock)
    assert isinstance(model.fs.unit.inlet1, Port)
    assert isinstance(model.fs.unit.inlet2, Port)
    assert isinstance(model.fs.unit.treated, Port)
    assert isinstance(model.fs.unit.recovery_frac_mass_H2O, Var)
    assert isinstance(model.fs.unit.removal_frac_mass_comp, Var)
    assert len(model.fs.unit.removal_frac_mass_comp) == 3
    assert isinstance(model.fs.unit.water_recovery_equation, Constraint)
    assert len(model.fs.unit.water_recovery_equation) == 1
    assert isinstance(model.fs.unit.solute_treated_equation, Constraint)
    assert len(model.fs.unit.solute_treated_equation) == 3