Commons IO example source code file (CloseShieldOutputStreamTest.java)

This example Commons IO source code file (CloseShieldOutputStreamTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons IO tags/keywords

bytearrayoutputstream, bytearrayoutputstream, closeshieldoutputstream, closeshieldoutputstream, closeshieldoutputstreamtest, io, ioexception, ioexception, outputstream, override, override, testcase

The Commons IO CloseShieldOutputStreamTest.java source code

/*
 * 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.commons.io.output;

import java.io.IOException;
import java.io.OutputStream;

import junit.framework.TestCase;

/**
 * JUnit Test Case for {@link CloseShieldOutputStream}.
 */
public class CloseShieldOutputStreamTest extends TestCase {

    private ByteArrayOutputStream original;

    private OutputStream shielded;

    private boolean closed;

    @Override
    protected void setUp() {
        original = new ByteArrayOutputStream() {
            @Override
            public void close() {
                closed = true;
            }
        };
        shielded = new CloseShieldOutputStream(original);
        closed = false;
    }

    /**
     * Test the <code>close() method.
     */
    public void testClose() throws IOException {
        shielded.close();
        assertFalse("closed", closed);
        try {
            shielded.write('x');
            fail("write(b)");
        } catch (IOException e) {
            // expected
        }
        original.write('y');
        assertEquals(1, original.size());
        assertEquals('y', original.toByteArray()[0]);
    }

}