How to use

fail

method

in

org.apache.commons.collections.collection.TestPredicatedCollection

public void testIllegalAdd() {
  Collection c = makeTestCollection();
  Integer i = new Integer(3);
  try {
    c.add(i);
    fail("Integer should fail string predicate.");
  } catch (IllegalArgumentException e) {
    // expected
  }
  assertTrue("Collection shouldn't contain illegal element", 
   !c.contains(i));   
}

public void testIllegalAddAll() {
  Collection c = makeTestCollection();
  List elements = new ArrayList();
  elements.add("one");
  elements.add("two");
  elements.add(new Integer(3));
  elements.add("four");
  try {
    c.addAll(elements);
    fail("Integer should fail string predicate.");
  } catch (IllegalArgumentException e) {
    // expected
  }
  assertTrue("Collection shouldn't contain illegal element", 
   !c.contains("one"));   
  assertTrue("Collection shouldn't contain illegal element", 
   !c.contains("two"));   
  assertTrue("Collection shouldn't contain illegal element", 
   !c.contains(new Integer(3)));   
  assertTrue("Collection shouldn't contain illegal element", 
   !c.contains("four"));   
}