public void testInvariant()
{
AstOclConstraintFactory factory1 = AstOclConstraintFactoryManager.getInstance(umlModel.getOclPackage());
AstOclModelElementFactory factory2 = AstOclModelElementFactoryManager.getInstance(umlModel.getOclPackage());
BooleanLiteralExp exp1 = factory2.createBooleanLiteralExp(true, getClassifier("Boolean"));
ExpressionInOcl expInOcl = factory1.createExpressionInOcl("name", getClassifier("Film"), exp1);
OclInvariantConstraint constraint = (OclInvariantConstraint)factory1.createInvariantConstraint("test.ocl", "myInvariant", getClassifier("Film"), expInOcl);
Assert.AreEqual("inv myInvariant: True", constraint.ToString());
Assert.IsTrue(getClassifier("Film").getAllInvariants().Contains(constraint));
getClassifier("Film").deleteAllConstraintsForSource("test.ocl");
Assert.IsFalse(getClassifier("Film").getAllInvariants().Contains(constraint));
}