testFieldNames.add("id");
    public void testGetPrimaryKeyFields() throws Exception {        Model model = Model.getInstanceByName("testmodel");        Class c = Class.forName("org.intermine.model.testmodel.Employee");        List fields = PrimaryKeyUtil.getPrimaryKeyFields(model, c);        ArrayList testFieldNames = new ArrayList();        testFieldNames.add("name");        testFieldNames.add("id");        assertEquals(testFieldNames, fields);    }