Package org.apache.harmony.security.tests.java.security.spec

Source Code of org.apache.harmony.security.tests.java.security.spec.EncodedKeySpecTest

/*
*  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.
*/

/**
* @author Vladimir N. Molotkov
* @version $Revision$
*/

package org.apache.harmony.security.tests.java.security.spec;

import java.security.spec.EncodedKeySpec;

import org.apache.harmony.security.tests.support.spec.MyEncodedKeySpec;

import junit.framework.TestCase;

/**
* Tests for <code>EncodedKeySpec</code> class fields and methods.
*
*/

public class EncodedKeySpecTest extends TestCase {

    /**
     * Constructor for EncodedKeySpecTest.
     * @param name
     */
    public EncodedKeySpecTest(String name) {
        super(name);
    }
   
    /**
     * Tests that <code>getEncoded()</code> method
     * returns valid byte array
     */
    public final void testGetEncoded() {
       
        byte[] encodedKey = new byte[] {(byte)1,(byte)2,(byte)3,(byte)4};
        EncodedKeySpec meks = new MyEncodedKeySpec(encodedKey);
       
        /* Get encoded key */
        byte[] ek = meks.getEncoded();
       
        /* Check returned array */
        boolean result = true;
        for (int i=0; i<encodedKey.length; i++) {
            if (encodedKey[i] != ek[i]) {
                /* indicate failure */
                result = false;
            }
        }
        /* passed */
        assertTrue(result);
    }
   
    /**
     * Tests that internal state of the object
     * can not be modified by modifying initial array value
     */
    public final void testIsStatePreserved1() {
        /* Create initial byte array */
        byte[] encodedKey = new byte[] {(byte)1,(byte)2,(byte)3,(byte)4};
       
        EncodedKeySpec meks = new MyEncodedKeySpec(encodedKey);
       
        /* Modify initial array's value */
        encodedKey[3] = (byte)5;
       
        /* Get encoded key */
        byte[] ek = meks.getEncoded();
       
        /* Check that byte value has not been changed */
        assertTrue(ek[3] == (byte)4);
    }
   
    /**
     * Tests that internal state of the object
     * can not be modified using returned value
     * of <code>getEncoded()</code> method
    */
    public final void testIsStatePreserved2() {
       
        byte[] encodedKey = new byte[] {(byte)1,(byte)2,(byte)3,(byte)4};
        EncodedKeySpec meks = new MyEncodedKeySpec(encodedKey);
       
        /* Get encoded key */
        byte[] ek = meks.getEncoded();       
        /* Modify returned value */
        ek[3] = (byte)5;
        /* Get encoded key again */
        byte[] ek1 = meks.getEncoded();
       
        /* Check that byte value has not been changed */
        assertTrue(ek1[3] == (byte)4);
    }
}
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