Commons IO example source code file (BoundedInputStreamTest.java)

This example Commons IO source code file (BoundedInputStreamTest.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

boundedinputstream, boundedinputstream, boundedinputstreamtest, boundedinputstreamtest, bytearrayinputstream, bytearrayinputstream, exception, hello, hello, io, testcase, world

The Commons IO BoundedInputStreamTest.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.input;

import java.io.ByteArrayInputStream;

import junit.framework.TestCase;

import org.apache.commons.io.IOUtils;

/**
 * Tests for {@link BoundedInputStream}.
 *
 * @version $Id: BoundedInputStreamTest.java 1003659 2010-10-01 21:41:38Z niallp $
 */
public class BoundedInputStreamTest extends TestCase {

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

    /**
     * Test {@link BoundedInputStream#read()}.
     */
    public void testReadSingle() throws Exception {
        BoundedInputStream bounded = null;
        byte[] helloWorld = "Hello World".getBytes();
        byte[] hello      = "Hello".getBytes();

        // limit = length
        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length);
        for (int i = 0; i < helloWorld.length; i++) {
            assertEquals("limit = length byte[" + i + "]", helloWorld[i], bounded.read());
        }
        assertEquals("limit = length end", -1, bounded.read());

        // limit > length
        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length + 1);
        for (int i = 0; i < helloWorld.length; i++) {
            assertEquals("limit > length byte[" + i + "]", helloWorld[i], bounded.read());
        }
        assertEquals("limit > length end", -1, bounded.read());

        // limit < length
        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), hello.length);
        for (int i = 0; i < hello.length; i++) {
            assertEquals("limit < length byte[" + i + "]", hello[i], bounded.read());
        }
        assertEquals("limit < length end", -1, bounded.read());
    }

    /**
     * Test {@link BoundedInputStream#read(byte[], int, int)}.
     */
    public void testReadArray() throws Exception {

        BoundedInputStream bounded = null;
        byte[] helloWorld = "Hello World".getBytes();
        byte[] hello      = "Hello".getBytes();

        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld));
        compare("limit = -1", helloWorld, IOUtils.toByteArray(bounded));

        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), 0);
        compare("limit = 0", new byte[0], IOUtils.toByteArray(bounded));

        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length);
        compare("limit = length", helloWorld, IOUtils.toByteArray(bounded));

        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length + 1);
        compare("limit > length", helloWorld, IOUtils.toByteArray(bounded));

        bounded = new BoundedInputStream(new ByteArrayInputStream(helloWorld), helloWorld.length - 6);
        compare("limit < length", hello, IOUtils.toByteArray(bounded));
    }

    /**
     * Compare byte arrays.
     */
    private void compare(String msg, byte[] expected, byte[] actual) {
        assertEquals(msg + " length", expected.length, actual.length);
        for (int i = 0; i < expected.length; i++) {
            assertEquals(msg + " byte[" + i + "]", expected[i], actual[i]);
        }
    }
}