/*
* Copyright 2003-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.collections.bag;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestSuite;
import org.apache.commons.collections.Bag;
import org.apache.commons.collections.Predicate;
import org.apache.commons.collections.PredicateUtils;
/**
* Extension of {@link TestBag} for exercising the {@link PredicatedBag}
* implementation.
*
* @since Commons Collections 3.0
* @version $Revision: 1.7 $ $Date: 2004/06/02 22:05:03 $
*
* @author Phil Steitz
*/
public class TestPredicatedBag extends AbstractTestBag {
public TestPredicatedBag(String testName) {
super(testName);
}
public static Test suite() {
return new TestSuite(TestPredicatedBag.class);
}
public static void main(String args[]) {
String[] testCaseName = { TestPredicatedBag.class.getName()};
junit.textui.TestRunner.main(testCaseName);
}
//--------------------------------------------------------------------------
protected Predicate stringPredicate() {
return new Predicate() {
public boolean evaluate(Object o) {
return o instanceof String;
}
};
}
protected Predicate truePredicate = PredicateUtils.truePredicate();
protected Bag decorateBag(HashBag bag, Predicate predicate) {
return PredicatedBag.decorate(bag, predicate);
}
public Bag makeBag() {
return decorateBag(new HashBag(), truePredicate);
}
protected Bag makeTestBag() {
return decorateBag(new HashBag(), stringPredicate());
}
//--------------------------------------------------------------------------
public void testlegalAddRemove() {
Bag bag = makeTestBag();
assertEquals(0, bag.size());
Object[] els = new Object[] {"1", "3", "5", "7", "2", "4", "1"};
for (int i = 0; i < els.length; i++) {
bag.add(els[i]);
assertEquals(i + 1, bag.size());
assertEquals(true, bag.contains(els[i]));
}
Set set = ((PredicatedBag) bag).uniqueSet();
assertTrue("Unique set contains the first element",set.contains(els[0]));
assertEquals(true, bag.remove(els[0]));
set = ((PredicatedBag) bag).uniqueSet();
assertTrue("Unique set now does not contain the first element",
!set.contains(els[0]));
}
public void testIllegalAdd() {
Bag bag = makeTestBag();
Integer i = new Integer(3);
try {
bag.add(i);
fail("Integer should fail string predicate.");
} catch (IllegalArgumentException e) {
// expected
}
assertTrue("Collection shouldn't contain illegal element",
!bag.contains(i));
}
public void testIllegalDecorate() {
HashBag elements = new HashBag();
elements.add("one");
elements.add("two");
elements.add(new Integer(3));
elements.add("four");
try {
Bag bag = decorateBag(elements, stringPredicate());
fail("Bag contains an element that should fail the predicate.");
} catch (IllegalArgumentException e) {
// expected
}
try {
Bag bag = decorateBag(new HashBag(), null);
fail("Expectiing IllegalArgumentException for null predicate.");
} catch (IllegalArgumentException e) {
// expected
}
}
public String getCompatibilityVersion() {
return "3.1";
}
// public void testCreate() throws Exception {
// Bag bag = makeBag();
// writeExternalFormToDisk((java.io.Serializable) bag, "D:/dev/collections/data/test/PredicatedBag.emptyCollection.version3.1.obj");
// bag = makeBag();
// bag.add("A");
// bag.add("A");
// bag.add("B");
// bag.add("B");
// bag.add("C");
// writeExternalFormToDisk((java.io.Serializable) bag, "D:/dev/collections/data/test/PredicatedBag.fullCollection.version3.1.obj");
// }
}