/* ====================================================================
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 org.apache.poi.util;
import junit.framework.TestCase;
/**
* Unit test for ArrayUtil
*
* @author Nick Burch
*/
public class TestArrayUtil extends TestCase {
/**
* Test to ensure that our own arraycopy behaves as it should do
*/
public void testarraycopy() {
byte[] bytes = new byte[] { 0x01, 0x02, 0x03, 0x04 };
// Test copy whole thing
byte[] dest = new byte[4];
ArrayUtil.arraycopy(bytes, 0, dest, 0, 4);
assertEquals(dest.length, bytes.length);
for(int i=0; i<dest.length; i++) {
assertEquals(bytes[i], dest[i]);
}
// ToDo - test exceptions are as expected
}
/**
* Helper for testArrayMoveWithin
*/
private Integer[] getIntsList() {
return new Integer[] {
Integer.valueOf(0),
Integer.valueOf(1),
Integer.valueOf(2),
Integer.valueOf(3),
Integer.valueOf(4),
Integer.valueOf(5),
Integer.valueOf(6),
Integer.valueOf(7),
Integer.valueOf(8),
Integer.valueOf(9)
};
}
private static void assertEquals(int exp, Integer act) {
assertEquals(exp, act.intValue());
}
/**
* Test to ensure that arrayMoveWithin works as expected
*/
public void testArrayMoveWithin() {
Integer[] ints = getIntsList();
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(2, ints[2]);
assertEquals(3, ints[3]);
assertEquals(4, ints[4]);
assertEquals(5, ints[5]);
assertEquals(6, ints[6]);
assertEquals(7, ints[7]);
assertEquals(8, ints[8]);
assertEquals(9, ints[9]);
//
// Moving to a later point in the array
//
// Shift 1 back
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 4, 8, 1);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(2, ints[2]);
assertEquals(3, ints[3]);
assertEquals(5, ints[4]);
assertEquals(6, ints[5]);
assertEquals(7, ints[6]);
assertEquals(8, ints[7]);
assertEquals(4, ints[8]);
assertEquals(9, ints[9]);
// Shift front 1 back
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 0, 7, 1);
assertEquals(1, ints[0]);
assertEquals(2, ints[1]);
assertEquals(3, ints[2]);
assertEquals(4, ints[3]);
assertEquals(5, ints[4]);
assertEquals(6, ints[5]);
assertEquals(7, ints[6]);
assertEquals(0, ints[7]);
assertEquals(8, ints[8]);
assertEquals(9, ints[9]);
// Shift 1 to end
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 4, 9, 1);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(2, ints[2]);
assertEquals(3, ints[3]);
assertEquals(5, ints[4]);
assertEquals(6, ints[5]);
assertEquals(7, ints[6]);
assertEquals(8, ints[7]);
assertEquals(9, ints[8]);
assertEquals(4, ints[9]);
//
// Moving to an earlier point in the array
//
// Shift 1 forward
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 8, 3, 1);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(2, ints[2]);
assertEquals(8, ints[3]);
assertEquals(3, ints[4]);
assertEquals(4, ints[5]);
assertEquals(5, ints[6]);
assertEquals(6, ints[7]);
assertEquals(7, ints[8]);
assertEquals(9, ints[9]);
// Shift end 1 forward
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 9, 2, 1);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(9, ints[2]);
assertEquals(2, ints[3]);
assertEquals(3, ints[4]);
assertEquals(4, ints[5]);
assertEquals(5, ints[6]);
assertEquals(6, ints[7]);
assertEquals(7, ints[8]);
assertEquals(8, ints[9]);
// Shift 1 to front
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 5, 0, 1);
assertEquals(5, ints[0]);
assertEquals(0, ints[1]);
assertEquals(1, ints[2]);
assertEquals(2, ints[3]);
assertEquals(3, ints[4]);
assertEquals(4, ints[5]);
assertEquals(6, ints[6]);
assertEquals(7, ints[7]);
assertEquals(8, ints[8]);
assertEquals(9, ints[9]);
//
// Moving many to a later point in the array
//
// Shift 3 back
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 2, 6, 3);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(5, ints[2]);
assertEquals(6, ints[3]);
assertEquals(7, ints[4]);
assertEquals(8, ints[5]);
assertEquals(2, ints[6]);
assertEquals(3, ints[7]);
assertEquals(4, ints[8]);
assertEquals(9, ints[9]);
// Shift 3 to back
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 2, 7, 3);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(5, ints[2]);
assertEquals(6, ints[3]);
assertEquals(7, ints[4]);
assertEquals(8, ints[5]);
assertEquals(9, ints[6]);
assertEquals(2, ints[7]);
assertEquals(3, ints[8]);
assertEquals(4, ints[9]);
// Shift from 3 front
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 0, 5, 3);
assertEquals(3, ints[0]);
assertEquals(4, ints[1]);
assertEquals(5, ints[2]);
assertEquals(6, ints[3]);
assertEquals(7, ints[4]);
assertEquals(0, ints[5]);
assertEquals(1, ints[6]);
assertEquals(2, ints[7]);
assertEquals(8, ints[8]);
assertEquals(9, ints[9]);
//
// Moving many to an earlier point in the array
//
// Shift 3 forward
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 6, 2, 3);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(6, ints[2]);
assertEquals(7, ints[3]);
assertEquals(8, ints[4]);
assertEquals(2, ints[5]);
assertEquals(3, ints[6]);
assertEquals(4, ints[7]);
assertEquals(5, ints[8]);
assertEquals(9, ints[9]);
// Shift 3 to front
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 6, 0, 3);
assertEquals(6, ints[0]);
assertEquals(7, ints[1]);
assertEquals(8, ints[2]);
assertEquals(0, ints[3]);
assertEquals(1, ints[4]);
assertEquals(2, ints[5]);
assertEquals(3, ints[6]);
assertEquals(4, ints[7]);
assertEquals(5, ints[8]);
assertEquals(9, ints[9]);
// Shift from 3 back
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 7, 3, 3);
assertEquals(0, ints[0]);
assertEquals(1, ints[1]);
assertEquals(2, ints[2]);
assertEquals(7, ints[3]);
assertEquals(8, ints[4]);
assertEquals(9, ints[5]);
assertEquals(3, ints[6]);
assertEquals(4, ints[7]);
assertEquals(5, ints[8]);
assertEquals(6, ints[9]);
// Check can't shift more than we have
try {
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 7, 3, 5);
fail();
} catch(IllegalArgumentException e) {
// Good, we don't have 5 from 7 onwards
}
// Check can't shift where would overshoot
try {
ints = getIntsList();
ArrayUtil.arrayMoveWithin(ints, 2, 7, 5);
fail();
} catch(IllegalArgumentException e) {
// Good, we can't fit 5 in starting at 7
}
}
}