IoUtilTest.java

/**
 * Copyright 2010 the original author or authors.
 *
 * 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 datameer.awstasks.util;

import static org.junit.Assert.*;

import java.io.IOException;
import java.io.InputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;

import org.junit.Test;

public class IoUtilTest {

    @Test
    public void testWriteBytes() throws IOException {
        // set size not over 1024 otherwise PipedOutputStream will hang
        long size = 1024;
        byte transferValue = 8;

        // fill iStream1
        PipedOutputStream oStream1 = new PipedOutputStream();
        InputStream iStream1 = new PipedInputStream(oStream1);
        for (int i = 0; i < size; i++) {
            oStream1.write(transferValue);
        }
        oStream1.close();

        // connect iStream2 with oStream 2
        PipedOutputStream oStream2 = new PipedOutputStream();
        InputStream iStream2 = new PipedInputStream(oStream2);

        assertEquals(size, iStream1.available());
        assertEquals(0, iStream2.available());

        // copy bytes from iStream1 to oStream2
        IoUtil.copyBytes(iStream1, oStream2);

        assertEquals(0, iStream1.available());
        assertEquals(size, iStream2.available());

        iStream1.close();
        iStream2.close();
        oStream2.close();
    }

    @Test
    public void testWriteBytesWithLength() throws IOException {
        // set size not over 1024 otherwise PipedOutputStream will hang
        long size = 1024;
        byte transferValue = 8;

        // fill iStream1
        PipedOutputStream oStream1 = new PipedOutputStream();
        InputStream iStream1 = new PipedInputStream(oStream1);
        for (int i = 0; i < size; i++) {
            oStream1.write(transferValue);
        }

        // connect iStream2 with oStream 2
        PipedOutputStream oStream2 = new PipedOutputStream();
        InputStream iStream2 = new PipedInputStream(oStream2);

        assertEquals(size, iStream1.available());
        assertEquals(0, iStream2.available());

        // copy bytes from iStream1 to oStream2
        IoUtil.copyBytes(iStream1, oStream2, iStream1.available());

        assertEquals(0, iStream1.available());
        assertEquals(size, iStream2.available());

        iStream1.close();
        oStream1.close();
        iStream2.close();
        oStream2.close();
    }

}