0.8.1-rc1/commons/src/test/java/org/apache/oodt/commons/io/NullInputStreamTest.java

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// file to you under the Apache License, Version 2.0 (the "License"); you may not
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// the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
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// the License.

package org.apache.oodt.commons.io;

import java.io.IOException;
import java.io.InputStream;
import junit.framework.TestCase;

/**
 * Unit test the {@link NullInputStream} class.
 *
 * @author Kelly
 */ 
public class NullInputStreamTest extends TestCase {
        /**
	 * Creates a new <code>NullInputStreamTest</code> instance.
	 *
	 * @param name Test case name.
	 */
	public NullInputStreamTest(String name) {
                super(name);
        }

        protected void setUp() throws Exception {
                in = new NullInputStream();
        }

        public void testClosing() {
                try {
                        in.close();
                } catch (IOException ex) {
                        fail("Should not throw an exception on close: " + ex.getMessage());
                }
                try {
                        in.read();
                        fail("Should not be able to read a closed stream");
                } catch (IOException ignore) {}
                try {
                        in.close();
                        fail("Should not be able to close a closed stream");
                } catch (IOException ignore) {}
        }

        public void testReading() {
                try {
                        assertEquals(-1, in.read());
                } catch (IOException ex) {
                        fail("Should not throw an exception on reading: " + ex.getMessage());
                }
        }

        /** The {@link NullInputStream} we're testing. */
        private NullInputStream in;
}