/*
 * Copyright 2006-2009 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.dsig;

import java.security.*;
import java.security.spec.AlgorithmParameterSpec;
import javax.xml.crypto.dsig.*;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.ExcC14NParameterSpec;

import junit.framework.*;

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

    XMLSignatureFactory factory;

    static {
        Security.insertProviderAt
            (new org.jcp.xml.dsig.internal.dom.XMLDSigRI(), 1);
    }

    private static final String C14N_ALGOS[] = {
	CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS,
	CanonicalizationMethod.INCLUSIVE,
	CanonicalizationMethod.EXCLUSIVE_WITH_COMMENTS,
	CanonicalizationMethod.EXCLUSIVE
    };

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

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

    public void setUp() throws Exception { 
	factory = XMLSignatureFactory.getInstance
            ("DOM", new org.jcp.xml.dsig.internal.dom.XMLDSigRI());
    }

    public void tearDown() { }

    public void testisFeatureSupported() throws Exception {
	CanonicalizationMethod cm; 
	for (int i = 0; i < C14N_ALGOS.length; i++) {
	    String algo = C14N_ALGOS[i];
	    ExcC14NParameterSpec params = null;
	    if (i >= 2) {
		params = new ExcC14NParameterSpec();
	    }
	    cm = factory.newCanonicalizationMethod(algo, params);
	    try {
		cm.isFeatureSupported(null); 
		fail("Should raise a NPE for null feature"); 
	    } catch (NullPointerException npe) {}
	    
	    assertTrue(!cm.isFeatureSupported("not supported"));
	}
    }

    public void testConstructor() throws Exception {
	// test newAlgorithmMethod(String algorithm, 
	//                         AlgorithmParameterSpec params)
	// for generating CanonicalizationMethod objects
	CanonicalizationMethod cm; 
	for (int i = 0; i < C14N_ALGOS.length; i++) {
	    String algo = C14N_ALGOS[i];
	    cm = factory.newCanonicalizationMethod(algo, 
		(C14NMethodParameterSpec) null);
	    assertNotNull(cm);
	    assertEquals(cm.getAlgorithm(), algo);
	    assertNull(cm.getParameterSpec());
	    
	    try {
		cm = factory.newCanonicalizationMethod
		    (algo, new TestUtils.MyOwnC14nParameterSpec());
		fail("Should raise an IAPE for invalid c14n parameters"); 
	    } catch (InvalidAlgorithmParameterException iape) {
	    } catch (Exception ex) {
		fail("Should raise a IAPE instead of " + ex); 
	    }
	    if (algo.equals(CanonicalizationMethod.EXCLUSIVE_WITH_COMMENTS) ||
		algo.equals(CanonicalizationMethod.EXCLUSIVE)) {
		cm = factory.newCanonicalizationMethod
		    (CanonicalizationMethod.EXCLUSIVE,
		     new ExcC14NParameterSpec());
		AlgorithmParameterSpec aps = cm.getParameterSpec();
		assertNotNull(aps);
		assertTrue(aps instanceof ExcC14NParameterSpec);	
	    }
	}

	try {
	    cm = factory.newCanonicalizationMethod(null, 
		(C14NMethodParameterSpec) null); 
	    fail("Should raise a NPE for null algo"); 
	} catch (NullPointerException npe) {
	} catch (Exception ex) {
	    fail("Should raise a NPE instead of " + ex); 
	}

	try {
	    cm = factory.newCanonicalizationMethod("non-existent", 
		(C14NMethodParameterSpec) null); 
	    fail("Should raise an NSAE for non-existent algos"); 
	} catch (NoSuchAlgorithmException nsae) {
	} catch (Exception ex) {
	    fail("Should raise an NSAE instead of " + ex); 
	}
    }
}