/*
* Copyright ( c ) 2011 , 2014 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
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* questions .
*/
/*
* @ test
* @ bug 5020931 8048207
* @ summary Unit test for Collections . checkedQueue
* @ run testng CheckedQueue
*/
import java.util.Collections;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;
import org.testng.annotations.Test;
import static org.testng.Assert .fail;
import static org.testng.Assert .assertEquals;
import static org.testng.Assert .assertTrue;
import static org.testng.Assert .assertFalse;
public class CheckedQueue {
/**
* This test adds items to a queue .
*/
@Test
public void testAdd() {
int arrayLength = 10 ;
Queue<String> abq = Collections.checkedQueue(new ArrayBlockingQueue<>(arrayLength), String.class );
for (int i = 0 ; i < arrayLength; i++) {
abq.add(Integer.toString(i));
}
try {
abq.add("full" );
} catch (IllegalStateException full) {
}
}
/**
* This test tests the CheckedQueue . add method . It creates a queue of
* { @ code String } s gets the checked queue , and attempt to add an Integer to
* the checked queue .
*/
@Test(expectedExceptions = ClassCastException.class )
public void testAddFail1() {
int arrayLength = 10 ;
ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(arrayLength + 1 );
for (int i = 0 ; i < arrayLength; i++) {
abq.add(Integer.toString(i));
}
Queue q = Collections.checkedQueue(abq, String.class );
q.add(0 );
}
/**
* This test tests the CheckedQueue . add method . It creates a queue of one
* { @ code String } , gets the checked queue , and attempt to add an Integer to
* the checked queue .
*/
@Test(expectedExceptions = ClassCastException.class )
public void testAddFail2() {
ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1 );
Queue q = Collections.checkedQueue(abq, String.class );
q.add(0 );
}
/**
* This test tests the Collections . checkedQueue method call for nulls in
* each and both of the parameters .
*/
@Test
public void testArgs() {
ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1 );
Queue q;
try {
q = Collections.checkedQueue(null , String.class );
fail( "should throw NullPointerException." );
} catch (NullPointerException npe) {
// Do nothing
}
try {
q = Collections.checkedQueue(abq, null );
fail( "should throw NullPointerException." );
} catch (Exception e) {
// Do nothing
}
try {
q = Collections.checkedQueue(null , null );
fail( "should throw NullPointerException." );
} catch (Exception e) {
// Do nothing
}
}
/**
* This test tests the CheckedQueue . offer method .
*/
@Test
public void testOffer() {
ArrayBlockingQueue<String> abq = new ArrayBlockingQueue(1 );
Queue q = Collections.checkedQueue(abq, String.class );
try {
q.offer(null );
fail("should throw NullPointerException." );
} catch (NullPointerException npe) {
// Do nothing
}
try {
q.offer(0 );
fail("should throw ClassCastException." );
} catch (ClassCastException cce) {
// Do nothing
}
assertTrue(q.offer("0" ), "queue should have room" );
// no room at the inn!
assertFalse(q.offer("1" ), "queue should be full" );
}
}
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(vorverarbeitet am 2026-09-29)
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