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885 lines (811 loc) · 29.6 KB
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 harmony;
import java.util.*;
abstract public class LinkedListTest extends junit.framework.TestCase {
LinkedList ll;
LinkedList<Object> testList;
private Object testObjOne;
private Object testObjTwo;
private Object testObjThree;
private Object testObjFour;
private Object testObjLast;
static Object[] objArray;
{
objArray = new Object[100];
for (int i = 0; i < objArray.length; i++)
objArray[i] = new Integer(i);
}
/**
* @tests java.util.LinkedList#LinkedList()
*/
public void test_Constructor() {
// Test for method java.util.LinkedList()
new Support_ListTest("", ll){}.runTest();
LinkedList subList = new LinkedList();
for (int i = -50; i < 150; i++)
subList.add(new Integer(i));
new Support_ListTest("", subList.subList(50, 150)){}.runTest();
}
/**
* @tests java.util.LinkedList#LinkedList(java.util.Collection)
*/
public void test_ConstructorLjava_util_Collection() {
// Test for method java.util.LinkedList(java.util.Collection)
assertTrue("Incorrect LinkedList constructed", new LinkedList(ll)
.equals(ll));
}
/**
* @tests java.util.LinkedList#add(int, java.lang.Object)
*/
public void test_addILjava_lang_Object() {
// Test for method void java.util.LinkedList.add(int, java.lang.Object)
Object o;
ll.add(50, o = "Test");
assertTrue("Failed to add Object>: " + ll.get(50).toString(), ll
.get(50) == o);
assertTrue("Failed to fix up list after insert",
ll.get(51) == objArray[50] && (ll.get(52) == objArray[51]));
ll.add(50, null);
assertNull("Did not add null correctly", ll.get(50));
try {
ll.add(-1, "Test");
fail("Should throw IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException e) {
// Excepted
}
try {
ll.add(-1, null);
fail("Should throw IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException e) {
// Excepted
}
try {
ll.add(ll.size() + 1, "Test");
fail("Should throw IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException e) {
// Excepted
}
try {
ll.add(ll.size() + 1, null);
fail("Should throw IndexOutOfBoundsException");
} catch (IndexOutOfBoundsException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#add(java.lang.Object)
*/
public void test_addLjava_lang_Object() {
// Test for method boolean java.util.LinkedList.add(java.lang.Object)
Object o;
ll.add(o = new Object());
assertTrue("Failed to add Object", ll.getLast() == o);
ll.add(null);
assertNull("Did not add null correctly", ll.get(ll.size() - 1));
}
/**
* @tests java.util.LinkedList#addAll(int, java.util.Collection)
*/
public void test_addAllILjava_util_Collection() {
// Test for method boolean java.util.LinkedList.addAll(int,
// java.util.Collection)
ll.addAll(50, (Collection) ll.clone());
assertEquals("Returned incorrect size after adding to existing list", 200, ll
.size());
for (int i = 0; i < 50; i++)
assertTrue("Manipulated elements < index", ll.get(i) == objArray[i]);
for (int i = 0; i >= 50 && (i < 150); i++)
assertTrue("Failed to ad elements properly",
ll.get(i) == objArray[i - 50]);
for (int i = 0; i >= 150 && (i < 200); i++)
assertTrue("Failed to ad elements properly",
ll.get(i) == objArray[i - 100]);
List myList = new LinkedList();
myList.add(null);
myList.add("Blah");
myList.add(null);
myList.add("Booga");
myList.add(null);
ll.addAll(50, myList);
assertNull("a) List w/nulls not added correctly", ll.get(50));
assertEquals("b) List w/nulls not added correctly",
"Blah", ll.get(51));
assertNull("c) List w/nulls not added correctly", ll.get(52));
assertEquals("d) List w/nulls not added correctly",
"Booga", ll.get(53));
assertNull("e) List w/nulls not added correctly", ll.get(54));
try {
ll.addAll(50, null);
fail("Should throw NullPointerException");
} catch (NullPointerException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#addAll(int, java.util.Collection)
*/
public void test_addAllILjava_util_Collection_2() {
// Regression for HARMONY-467
LinkedList obj = new LinkedList();
try {
obj.addAll(-1, (Collection) null);
fail("IndexOutOfBoundsException expected");
} catch (IndexOutOfBoundsException e) {
}
}
/**
* @tests java.util.LinkedList#addAll(java.util.Collection)
*/
public void test_addAllLjava_util_Collection() {
// Test for method boolean
// java.util.LinkedList.addAll(java.util.Collection)
List l = new ArrayList();
l.addAll((Collection) ll.clone());
for (int i = 0; i < ll.size(); i++)
assertTrue("Failed to add elements properly", l.get(i).equals(
ll.get(i)));
ll.addAll((Collection) ll.clone());
assertEquals("Returned incorrect siZe after adding to existing list", 200, ll
.size());
for (int i = 0; i < 100; i++) {
assertTrue("Added to list in incorrect order", ll.get(i).equals(
l.get(i)));
assertTrue("Failed to add to existing list", ll.get(i + 100)
.equals(l.get(i)));
}
List myList = new LinkedList();
myList.add(null);
myList.add("Blah");
myList.add(null);
myList.add("Booga");
myList.add(null);
ll.addAll(myList);
assertNull("a) List w/nulls not added correctly", ll.get(200));
assertEquals("b) List w/nulls not added correctly",
"Blah", ll.get(201));
assertNull("c) List w/nulls not added correctly", ll.get(202));
assertEquals("d) List w/nulls not added correctly",
"Booga", ll.get(203));
assertNull("e) List w/nulls not added correctly", ll.get(204));
try {
ll.addAll(null);
fail("Should throw NullPointerException");
} catch (NullPointerException e) {
// Excepted
}
}
public void test_addAll_Self_Ljava_util_Collection() {
LinkedList linkedList = new LinkedList();
linkedList.addLast(1);
assertEquals(1, linkedList.size());
assertTrue(linkedList.addAll(linkedList));
assertEquals(2, linkedList.size());
}
public void test_addAll_Self_ILjava_util_Collection() {
LinkedList linkedList = new LinkedList();
linkedList.addLast(1);
assertEquals(1, linkedList.size());
assertTrue(linkedList.addAll(1, linkedList));
assertEquals(2, linkedList.size());
}
/**
* @tests java.util.LinkedList#addFirst(java.lang.Object)
*/
public void test_addFirstLjava_lang_Object() {
// Test for method void java.util.LinkedList.addFirst(java.lang.Object)
Object o;
ll.addFirst(o = new Object());
assertTrue("Failed to add Object", ll.getFirst() == o);
ll.addFirst(null);
assertNull("Failed to add null", ll.getFirst());
}
/**
* @tests java.util.LinkedList#addLast(java.lang.Object)
*/
public void test_addLastLjava_lang_Object() {
// Test for method void java.util.LinkedList.addLast(java.lang.Object)
Object o;
ll.addLast(o = new Object());
assertTrue("Failed to add Object", ll.getLast() == o);
ll.addLast(null);
assertNull("Failed to add null", ll.getLast());
}
/**
* @tests java.util.LinkedList#clear()
*/
public void test_clear() {
// Test for method void java.util.LinkedList.clear()
ll.clear();
for (int i = 0; i < ll.size(); i++)
assertNull("Failed to clear list", ll.get(i));
}
/**
* @tests java.util.LinkedList#clone()
*/
public void test_clone() {
// Test for method java.lang.Object java.util.LinkedList.clone()
Object x = ll.clone();
assertTrue("Cloned list was inequal to cloned", x.equals(ll));
for (int i = 0; i < ll.size(); i++)
assertTrue("Cloned list contains incorrect elements", ll.get(i)
.equals(((LinkedList) x).get(i)));
ll.addFirst(null);
x = ll.clone();
assertTrue("List with a null did not clone properly", ll.equals(x));
}
/**
* @tests java.util.LinkedList#contains(java.lang.Object)
*/
public void test_containsLjava_lang_Object() {
// Test for method boolean
// java.util.LinkedList.contains(java.lang.Object)
assertTrue("Returned false for valid element", ll
.contains(objArray[99]));
assertTrue("Returned false for equal element", ll.contains(new Integer(
8)));
assertTrue("Returned true for invalid element", !ll
.contains(new Object()));
assertTrue("Should not contain null", !ll.contains(null));
ll.add(25, null);
assertTrue("Should contain null", ll.contains(null));
}
/**
* @tests java.util.LinkedList#get(int)
*/
public void test_getI() {
// Test for method java.lang.Object java.util.LinkedList.get(int)
assertTrue("Returned incorrect element", ll.get(22) == objArray[22]);
try {
ll.get(8765);
fail("Failed to throw expected exception for index > size");
} catch (IndexOutOfBoundsException e) {
}
}
/**
* @tests {@link java.util.LinkedList#peek()}
*/
public void test_peek() {
LinkedList list = new LinkedList();
assertNull("Should return null if this list is empty", list.peek());
assertEquals("Returned incorrect first element", ll.peek(),objArray[0]);
assertEquals("Peek remove the head (first element) of this list", ll.getFirst(), objArray[0]);
}
/**
* @tests java.util.LinkedList#getFirst()
*/
public void test_getFirst() {
// Test for method java.lang.Object java.util.LinkedList.getFirst()
assertTrue("Returned incorrect first element", ll.getFirst().equals(
objArray[0]));
LinkedList list = new LinkedList();
try {
list.getFirst();
fail("Should throw NoSuchElementException");
} catch (NoSuchElementException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#getLast()
*/
public void test_getLast() {
// Test for method java.lang.Object java.util.LinkedList.getLast()
assertTrue("Returned incorrect first element", ll.getLast().equals(
objArray[objArray.length - 1]));
LinkedList list = new LinkedList();
try {
list.getLast();
fail("Should throw NoSuchElementException");
} catch (NoSuchElementException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#indexOf(java.lang.Object)
*/
public void test_indexOfLjava_lang_Object() {
// Test for method int java.util.LinkedList.indexOf(java.lang.Object)
assertEquals("Returned incorrect index", 87, ll.indexOf(objArray[87]));
assertEquals("Returned index for invalid Object", -1, ll
.indexOf(new Object()));
ll.add(20, null);
ll.add(24, null);
assertTrue("Index of null should be 20, but got: " + ll.indexOf(null),
ll.indexOf(null) == 20);
}
/**
* @tests java.util.LinkedList#lastIndexOf(java.lang.Object)
*/
public void test_lastIndexOfLjava_lang_Object() {
// Test for method int
// java.util.LinkedList.lastIndexOf(java.lang.Object)
ll.add(new Integer(99));
assertEquals("Returned incorrect index",
100, ll.lastIndexOf(objArray[99]));
assertEquals("Returned index for invalid Object", -1, ll
.lastIndexOf(new Object()));
ll.add(20, null);
ll.add(24, null);
assertTrue("Last index of null should be 20, but got: "
+ ll.lastIndexOf(null), ll.lastIndexOf(null) == 24);
}
/**
* @tests java.util.LinkedList#listIterator(int)
*/
public void test_listIteratorI() {
// Test for method java.util.ListIterator
// java.util.LinkedList.listIterator(int)
ListIterator i = ll.listIterator();
Object elm;
int n = 0;
while (i.hasNext()) {
if (n == 0 || n == objArray.length - 1) {
if (n == 0)
assertTrue("First element claimed to have a previous", !i
.hasPrevious());
if (n == objArray.length)
assertTrue("Last element claimed to have next", !i
.hasNext());
}
elm = i.next();
assertTrue("Iterator returned elements in wrong order",
elm == objArray[n]);
if (n > 0 && n < objArray.length - 1) {
assertTrue("Next index returned incorrect value",
i.nextIndex() == n + 1);
assertTrue("previousIndex returned incorrect value : "
+ i.previousIndex() + ", n val: " + n, i
.previousIndex() == n);
}
++n;
}
List myList = new LinkedList();
myList.add(null);
myList.add("Blah");
myList.add(null);
myList.add("Booga");
myList.add(null);
ListIterator li = myList.listIterator();
assertTrue("li.hasPrevious() should be false", !li.hasPrevious());
assertNull("li.next() should be null", li.next());
assertTrue("li.hasPrevious() should be true", li.hasPrevious());
assertNull("li.prev() should be null", li.previous());
assertNull("li.next() should be null", li.next());
assertEquals("li.next() should be Blah", "Blah", li.next());
assertNull("li.next() should be null", li.next());
assertEquals("li.next() should be Booga", "Booga", li.next());
assertTrue("li.hasNext() should be true", li.hasNext());
assertNull("li.next() should be null", li.next());
assertTrue("li.hasNext() should be false", !li.hasNext());
}
/**
* @tests java.util.LinkedList#remove(int)
*/
public void test_removeI() {
// Test for method java.lang.Object java.util.LinkedList.remove(int)
ll.remove(10);
assertEquals("Failed to remove element", -1, ll.indexOf(objArray[10]));
try {
ll.remove(999);
fail("Failed to throw expected exception when index out of range");
} catch (IndexOutOfBoundsException e) {
// Correct
}
ll.add(20, null);
ll.remove(20);
assertNotNull("Should have removed null", ll.get(20));
}
/**
* @tests java.util.LinkedList#remove(java.lang.Object)
*/
public void test_removeLjava_lang_Object() {
// Test for method boolean java.util.LinkedList.remove(java.lang.Object)
assertTrue("Failed to remove valid Object", ll.remove(objArray[87]));
assertTrue("Removed invalid object", !ll.remove(new Object()));
assertEquals("Found Object after removal", -1, ll.indexOf(objArray[87]));
ll.add(null);
ll.remove(null);
assertTrue("Should not contain null afrer removal", !ll.contains(null));
}
/**
* @tests java.util.LinkedList#removeFirst()
*/
public void test_removeFirst() {
// Test for method java.lang.Object java.util.LinkedList.removeFirst()
ll.removeFirst();
assertTrue("Failed to remove first element",
ll.getFirst() != objArray[0]);
LinkedList list = new LinkedList();
try {
list.removeFirst();
fail("Should throw NoSuchElementException");
} catch (NoSuchElementException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#removeLast()
*/
public void test_removeLast() {
// Test for method java.lang.Object java.util.LinkedList.removeLast()
ll.removeLast();
assertTrue("Failed to remove last element",
ll.getLast() != objArray[objArray.length - 1]);
LinkedList list = new LinkedList();
try {
list.removeLast();
fail("Should throw NoSuchElementException");
} catch (NoSuchElementException e) {
// Excepted
}
}
/**
* @tests java.util.LinkedList#set(int, java.lang.Object)
*/
public void test_setILjava_lang_Object() {
// Test for method java.lang.Object java.util.LinkedList.set(int,
// java.lang.Object)
Object obj;
ll.set(65, obj = new Object());
assertTrue("Failed to set object", ll.get(65) == obj);
}
/**
* @tests java.util.LinkedList#size()
*/
public void test_size() {
// Test for method int java.util.LinkedList.size()
assertTrue("Returned incorrect size", ll.size() == objArray.length);
ll.removeFirst();
assertTrue("Returned incorrect size", ll.size() == objArray.length - 1);
}
/**
* @tests java.util.LinkedList#toArray()
*/
public void test_toArray() {
// Test for method java.lang.Object [] java.util.LinkedList.toArray()
ll.add(null);
Object[] obj = ll.toArray();
assertEquals("Returned array of incorrect size", objArray.length + 1, obj.length);
for (int i = 0; i < obj.length - 1; i++)
assertTrue("Returned incorrect array: " + i, obj[i] == objArray[i]);
assertNull("Returned incorrect array--end isn't null",
obj[obj.length - 1]);
}
/**
* @tests java.util.LinkedList#toArray(java.lang.Object[])
*/
public void test_toArray$Ljava_lang_Object() {
// Test for method java.lang.Object []
// java.util.LinkedList.toArray(java.lang.Object [])
Integer[] argArray = new Integer[100];
Object[] retArray;
retArray = ll.toArray(argArray);
assertTrue("Returned different array than passed", retArray == argArray);
List retList = new LinkedList(Arrays.asList(retArray));
Iterator li = ll.iterator();
Iterator ri = retList.iterator();
while (li.hasNext())
assertTrue("Lists are not equal", li.next() == ri.next());
argArray = new Integer[1000];
retArray = ll.toArray(argArray);
assertNull("Failed to set first extra element to null", argArray[ll
.size()]);
for (int i = 0; i < ll.size(); i++)
assertTrue("Returned incorrect array: " + i,
retArray[i] == objArray[i]);
ll.add(50, null);
argArray = new Integer[101];
retArray = ll.toArray(argArray);
assertTrue("Returned different array than passed", retArray == argArray);
retArray = ll.toArray(argArray);
assertTrue("Returned different array than passed", retArray == argArray);
retList = new LinkedList(Arrays.asList(retArray));
li = ll.iterator();
ri = retList.iterator();
while (li.hasNext())
assertTrue("Lists are not equal", li.next() == ri.next());
}
/**
* @tests {@link java.util.LinkedList#offer(Object)}
*/
public void test_offer() {
int origSize = ll.size();
assertTrue("offer() should return true'", ll.offer(objArray[0]));
assertEquals("offer() should add an element as the last one", origSize, ll.lastIndexOf(objArray[0]));
}
/**
* @tests {@link java.util.LinkedList#poll()}
*/
public void test_poll() {
assertEquals("should return the head", objArray[0], ll.poll());
LinkedList list = new LinkedList();
assertNull("should return 'null' if list is empty", list.poll());
}
/**
* @tests {@link java.util.LinkedList#remove()}
*/
public void test_remove() {
for (int i = 0; i < objArray.length; i++) {
assertEquals("should remove the head", objArray[i], ll.remove());
}
assertEquals("should be empty", 0, ll.size());
try {
ll.remove();
fail("NoSuchElementException is expected when removing from the empty list");
} catch (NoSuchElementException e) {
//-- expected
}
}
/**
* @tests {@link java.util.LinkedList#element()}
*/
public void test_element() {
assertEquals("should return the head", objArray[0], ll.element());
assertEquals("element() should remove nothing", objArray.length, ll.size());
try {
new LinkedList().remove();
fail("NoSuchElementException is expected when the list is empty");
} catch (NoSuchElementException e) {
//-- expected
}
}
/**
* @tests {@link java.util.LinkedList#removeFirstOccurrence(Object)}
*/
public void test_removeFirstOccurrence() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjThree));
assertTrue(testList.offerLast(testObjOne));
assertEquals(5, testList.size());
assertTrue(testList.removeFirstOccurrence(testObjOne));
assertFalse(testList.removeFirstOccurrence(testObjFour));
assertEquals(testObjTwo, testList.peekFirst());
assertEquals(testObjOne, testList.peekLast());
assertEquals(4, testList.size());
assertTrue(testList.removeFirstOccurrence(testObjOne));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.peekLast());
assertTrue(testList.removeFirstOccurrence(testObjOne));
assertEquals(2, testList.size());
assertEquals(testObjThree, testList.peekLast());
assertFalse(testList.removeFirstOccurrence(testObjOne));
}
/**
* @tests {@link java.util.LinkedList#removeLastOccurrence(Object)}
*/
public void test_removeLastOccurrence() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjThree));
assertTrue(testList.offerLast(testObjOne));
assertEquals(5, testList.size());
assertTrue(testList.removeLastOccurrence(testObjOne));
assertFalse(testList.removeLastOccurrence(testObjFour));
assertEquals(testObjOne, testList.peekFirst());
assertEquals(testObjThree, testList.peekLast());
assertEquals(4, testList.size());
assertTrue(testList.removeLastOccurrence(testObjOne));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.peekFirst());
assertEquals(testObjThree, testList.peekLast());
assertTrue(testList.removeLastOccurrence(testObjOne));
assertEquals(2, testList.size());
assertEquals(testObjThree, testList.peekLast());
assertFalse(testList.removeLastOccurrence(testObjOne));
}
/**
* @tests {@link java.util.LinkedList#offerFirst(Object)}
*/
public void test_offerFirst() throws Exception {
assertTrue(testList.offerFirst(testObjOne));
assertEquals(1, testList.size());
assertEquals(testObjOne, testList.peek());
assertTrue(testList.offerFirst(testObjOne));
assertEquals(2, testList.size());
assertEquals(testObjOne, testList.peek());
assertTrue(testList.offerFirst(testObjTwo));
assertEquals(3, testList.size());
assertEquals(testObjTwo, testList.peek());
assertEquals(testObjOne, testList.getLast());
assertTrue(testList.offerFirst(null));
assertEquals(4, testList.size());
}
/**
* @tests {@link java.util.LinkedList#offerLast(Object)}
*/
public void test_offerLast() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertEquals(1, testList.size());
assertEquals(testObjOne, testList.peek());
assertTrue(testList.offerLast(testObjOne));
assertEquals(2, testList.size());
assertEquals(testObjOne, testList.peek());
assertTrue(testList.offerLast(testObjTwo));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.peek());
assertEquals(testObjTwo, testList.getLast());
assertTrue(testList.offerLast(null));
assertEquals(4, testList.size());
}
/**
* @tests {@link java.util.LinkedList#push(Object)}
*/
public void test_push() throws Exception {
testList.push(testObjOne);
assertEquals(1, testList.size());
assertEquals(testObjOne, testList.peek());
testList.push(testObjOne);
assertEquals(2, testList.size());
assertEquals(testObjOne, testList.peek());
testList.push(testObjTwo);
assertEquals(3, testList.size());
assertEquals(testObjTwo, testList.peek());
assertEquals(testObjOne, testList.getLast());
testList.push(null);
assertEquals(4, testList.size());
}
/**
* @tests {@link java.util.LinkedList#pop()}
*/
public void test_pop() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjThree));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.pop());
assertEquals(2, testList.size());
assertEquals(testObjTwo, testList.pop());
assertEquals(testObjThree, testList.pop());
assertEquals(0, testList.size());
testList.push(null);
assertEquals(1, testList.size());
assertNull(testList.pop());
try {
testList.pop();
fail("should throw NoSuchElementException ");
} catch (NoSuchElementException e) {
// expected
}
}
/**
* @tests {@link java.util.LinkedList#descendingIterator()}
*/
public void test_descendingIterator() throws Exception {
assertFalse(testList.descendingIterator().hasNext());
assertTrue(testList.add(testObjOne));
assertTrue(testList.add(testObjTwo));
assertTrue(testList.add(testObjOne));
assertTrue(testList.add(testObjThree));
assertTrue(testList.add(testObjLast));
Iterator result = testList.descendingIterator();
assertEquals(5, testList.size());
try {
result.remove();
fail("should throw IllegalStateException");
} catch (IllegalStateException e) {
// expected
}
assertTrue(testList.add(testObjFour));
try {
assertEquals(testObjLast,result.next());
fail("should throw ConcurrentModificationException");
} catch (ConcurrentModificationException e) {
// expected
}
result = testList.descendingIterator();
assertEquals(testObjFour, result.next());
assertEquals(testObjLast, result.next());
assertEquals(testObjThree, result.next());
assertEquals(testObjOne, result.next());
assertEquals(testObjTwo, result.next());
assertTrue(result.hasNext());
result.remove();
assertEquals(testObjOne, result.next());
assertFalse(result.hasNext());
try {
result.next();
fail("should throw NoSuchElementException");
} catch (NoSuchElementException e) {
// expected
}
}
/**
* @tests {@link java.util.LinkedList#pollFirst()}
*/
public void test_pollFirst() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjThree));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.pollFirst());
assertEquals(2, testList.size());
assertEquals(testObjTwo, testList.pollFirst());
assertEquals(testObjThree, testList.pollFirst());
assertEquals(0, testList.size());
assertNull(testList.pollFirst());
}
/**
* @tests {@link java.util.LinkedList#pollLast()}
*/
public void test_pollLast() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjThree));
assertEquals(3, testList.size());
assertEquals(testObjThree, testList.pollLast());
assertEquals(2, testList.size());
assertEquals(testObjTwo, testList.pollLast());
assertEquals(testObjOne, testList.pollLast());
assertEquals(0, testList.size());
assertNull(testList.pollFirst());
}
/**
* @tests {@link java.util.LinkedList#peekFirst()}
*/
public void test_peekFirst() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjThree));
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.peekFirst());
assertEquals(3, testList.size());
assertEquals(testObjOne, testList.pollFirst());
assertEquals(testObjTwo, testList.peekFirst());
assertEquals(testObjTwo, testList.pollFirst());
assertEquals(testObjThree, testList.pollFirst());
assertEquals(0, testList.size());
assertEquals(null, testList.peekFirst());
}
/**
* @tests {@link java.util.LinkedList#peek()}
*/
public void test_peekLast() throws Exception {
assertTrue(testList.offerLast(testObjOne));
assertTrue(testList.offerLast(testObjTwo));
assertTrue(testList.offerLast(testObjThree));
assertEquals(3, testList.size());
assertEquals(testObjThree, testList.peekLast());
assertEquals(3, testList.size());
assertEquals(testObjThree, testList.pollLast());
assertEquals(testObjTwo, testList.peekLast());
assertEquals(testObjTwo, testList.pollLast());
assertEquals(testObjOne, testList.pollLast());
assertEquals(0, testList.size());
assertNull(testList.peekLast());
}
/**
* Sets up the fixture, for example, open a network connection. This method
* is called before a test is executed.
*/
protected void setUp() throws Exception {
super.setUp();
ll = new LinkedList();
for (int i = 0; i < objArray.length; i++) {
ll.add(objArray[i]);
}
testList = new LinkedList<Object>();
testObjOne = new Object();
testObjTwo = new Object();
testObjThree = new Object();
testObjFour = new Object();
testObjLast = new Object();
}
}