stringencoderabstracttest.java

一个很实用的东东

/*
 * 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.codec;

import junit.framework.TestCase;

/**
 * @version $Id: StringEncoderAbstractTest.java,v 1.9 2004/04/19 01:14:29 ggregory Exp $
 * @author Apache Software Foundation
 */
public abstract class StringEncoderAbstractTest extends TestCase {

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

    protected abstract StringEncoder makeEncoder();

    // ------------------------------------------------------------------------

    public void testEncodeEmpty() throws Exception {
        Encoder encoder = makeEncoder();
        encoder.encode("");
        encoder.encode(" ");
        encoder.encode("\t");
    }        

    public void testEncodeNull() throws Exception {
        StringEncoder encoder = makeEncoder();
	
	try {
	    encoder.encode(null);
	} catch( EncoderException ee ) {
	    // An exception should be thrown
	}
    }        

    public void testEncodeWithInvalidObject() throws Exception {

        boolean exceptionThrown = false;
        try {
            StringEncoder encoder = makeEncoder();
            encoder.encode( new Float( 3.4 ) );
        } catch( Exception e ) {
            exceptionThrown = true;
        }

        assertTrue( "An exception was not thrown when we tried to encode " +
                    "a Float object", exceptionThrown );
    }
}