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The source code
/*
* Copyright 2001-2004 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.iterators;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests the ArrayIterator with primitive type arrays.
*
* @version $Revision: 1.7 $ $Date: 2004/02/18 01:20:33 $
*
* @author Morgan Delagrange
* @author James Strachan
*/
public class TestArrayIterator2 extends AbstractTestIterator {
protected int[] testArray = { 2, 4, 6, 8 };
public static Test suite() {
return new TestSuite(TestArrayIterator2.class);
}
public TestArrayIterator2(String testName) {
super(testName);
}
public Iterator makeEmptyIterator() {
return new ArrayIterator(new int[0]);
}
public Iterator makeFullIterator() {
return new ArrayIterator(testArray);
}
/*
* We use these makeArrayIterator factory methods instead of
* directly calling the constructor so as to allow subclasses
* (e.g. TestArrayListIterator2) to use the existing test code.
*
* @return ArrayIterator
*/
public ArrayIterator makeArrayIterator() {
return (ArrayIterator) makeEmptyIterator();
}
public ArrayIterator makeArrayIterator(Object array) {
return new ArrayIterator(array);
}
public ArrayIterator makeArrayIterator(Object array, int index) {
return new ArrayIterator(array, index);
}
public ArrayIterator makeArrayIterator(Object array, int start, int end) {
return new ArrayIterator(array, start, end);
}
public boolean supportsRemove() {
return false;
}
public void testIterator() {
Iterator iter = (Iterator) makeFullIterator();
for (int i = 0; i < testArray.length; i++) {
Integer testValue = new Integer(testArray[i]);
Number iterValue = (Number) iter.next();
assertEquals("Iteration value is correct", testValue, iterValue);
}
assertTrue("Iterator should now be empty", !iter.hasNext());
try {
Object testValue = iter.next();
} catch (Exception e) {
assertTrue(
"NoSuchElementException must be thrown",
e.getClass().equals((new NoSuchElementException()).getClass()));
}
}
// proves that an ArrayIterator set with the constructor has the same number of elements
// as an ArrayIterator set with setArray(Object)
public void testSetArray() {
Iterator iter1 = makeArrayIterator(testArray);
int count1 = 0;
while (iter1.hasNext()) {
++count1;
iter1.next();
}
assertEquals("the count should be right using the constructor", count1, testArray.length);
ArrayIterator iter2 = makeArrayIterator();
iter2.setArray(testArray);
int count2 = 0;
while (iter2.hasNext()) {
++count2;
iter2.next();
}
assertEquals("the count should be right using setArray(Object)", count2, testArray.length);
}
public void testIndexedArray() {
Iterator iter = makeArrayIterator(testArray, 2);
int count = 0;
while (iter.hasNext()) {
++count;
iter.next();
}
assertEquals("the count should be right using ArrayIterator(Object,2) ", count, testArray.length - 2);
iter = makeArrayIterator(testArray, 1, testArray.length - 1);
count = 0;
while (iter.hasNext()) {
++count;
iter.next();
}
assertEquals(
"the count should be right using ArrayIterator(Object,1," + (testArray.length - 1) + ") ",
count,
testArray.length - 2);
try {
iter = makeArrayIterator(testArray, -1);
fail("new ArrayIterator(Object,-1) should throw an ArrayIndexOutOfBoundsException");
} catch (ArrayIndexOutOfBoundsException aioobe) {
// expected
}
try {
iter = makeArrayIterator(testArray, testArray.length + 1);
fail("new ArrayIterator(Object,length+1) should throw an ArrayIndexOutOfBoundsException");
} catch (ArrayIndexOutOfBoundsException aioobe) {
// expected
}
try {
iter = makeArrayIterator(testArray, 0, -1);
fail("new ArrayIterator(Object,0,-1) should throw an ArrayIndexOutOfBoundsException");
} catch (ArrayIndexOutOfBoundsException aioobe) {
// expected
}
try {
iter = makeArrayIterator(testArray, 0, testArray.length + 1);
fail("new ArrayIterator(Object,0,length+1) should throw an ArrayIndexOutOfBoundsException");
} catch (ArrayIndexOutOfBoundsException aioobe) {
// expected
}
try {
iter = makeArrayIterator(testArray, 1, 1);
// expected not to fail
} catch (IllegalArgumentException iae) {
// MODIFIED: an iterator over a zero-length section of array
// should be perfectly legal behavior
fail("new ArrayIterator(Object,1,1) should NOT throw an IllegalArgumentException");
}
try {
iter = makeArrayIterator(testArray, testArray.length - 1, testArray.length - 2);
fail("new ArrayIterator(Object,length-2,length-1) should throw an IllegalArgumentException");
} catch (IllegalArgumentException iae) {
// expected
}
}
}
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