/*
 * Copyright  2006 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.
 *
 */
/*
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 */
package javax.xml.crypto.test;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.Arrays;
import javax.xml.crypto.KeySelectorException;

import junit.framework.*;

/**
 * Unit test for javax.xml.crypto.KeySelectorException
 *
 * @version $Id$
 * @author Valerie Peng
 */
public class KeySelectorExceptionTest extends TestCase {

    public KeySelectorExceptionTest() {
	super("KeySelectorExceptionTest");
    }

    public KeySelectorExceptionTest(String name) {
	super(name);
    }

    public void setUp() throws Exception { }

    public void tearDown() { }

    public void testConstructor() {
	// test KeySelectorException()
	KeySelectorException kse = new KeySelectorException();
	assertNull(kse.getMessage());
	assertNull(kse.getCause());

	// test KeySelectorException(String)
	kse = new KeySelectorException("test");
	assertEquals("test", kse.getMessage());
	assertNull(kse.getCause());
	
	// test KeySelectorException(String, Throwable)
	IllegalArgumentException iae = new IllegalArgumentException("iae");
	kse = new KeySelectorException("random", iae);
	assertEquals("random", kse.getMessage());
	assertTrue(compareThrowable(iae, kse.getCause()));

	// test KeySelectorException(Throwable)
	kse = new KeySelectorException(iae);
	assertEquals(iae.toString(), kse.getMessage());
	assertTrue(compareThrowable(iae, kse.getCause()));
    }
    private static boolean compareThrowable(Throwable t1, Throwable t2) {
	boolean result = false;
	// first compare their toString presentation
	if (t1.toString().equals(t2.toString())) {
	    ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
	    ByteArrayOutputStream baos2 = new ByteArrayOutputStream();
	    // then compare their StackTrace
	    PrintStream ps = new PrintStream(baos1);
	    t1.printStackTrace(ps);
	    ps.close();
	    ps = new PrintStream(baos2);
	    t2.printStackTrace(ps);
	    ps.close();

	    if (Arrays.equals(baos1.toByteArray(), baos2.toByteArray())) {
		result = true;
	    } else {
		System.out.println("StackTrace comparison failed");
		t1.printStackTrace(System.out);
		t2.printStackTrace(System.out);
	    }
	} else {
	    System.out.println("ToString comparison failed");
	    System.out.println(t1);
	    System.out.println(t2);
	}
	return result;
    }
}