TechnicalProperty property = ConstraintsFactory.eINSTANCE.createBooleanTechnicalProperty();
gssQuery.getAssignedConstraintsSet().getAssignedConstraints().add(constraint1);
new SetConstraintPropertyCommand(constraint1, property).runWithoutUnicaseCommand();
assertEquals(1, gssQuery.getAssignedConstraintsSet().getAssignedConstraints().size());
assertEquals(property, constraint1.getTechnicalProperty());