TestIdentityInputStream.java

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 * 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,
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 * KIND, either express or implied.  See the License for the
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 *
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package org.apache.ogt.http.impl.io;

import junit.framework.TestCase;

import org.apache.ogt.http.impl.io.IdentityInputStream;
import org.apache.ogt.http.io.SessionInputBuffer;
import org.apache.ogt.http.mockup.SessionInputBufferMockup;

/**
 * Simple tests for {@link IdentityInputStream}.
 *
 */
public class TestIdentityInputStream extends TestCase {

    // ------------------------------------------------------------ Constructor
    public TestIdentityInputStream(String testName) {
        super(testName);
    }

    // ------------------------------------------------------- TestCase Methods

    public void testConstructor() throws Exception {
        SessionInputBuffer receiver = new SessionInputBufferMockup(new byte[] {});
        new IdentityInputStream(receiver);
        try {
            new IdentityInputStream(null);
            fail("IllegalArgumentException should have been thrown");
        } catch (IllegalArgumentException ex) {
            //expected
        }
    }

    public void testBasicRead() throws Exception {
        byte[] input = new byte[] {'a', 'b', 'c'};
        SessionInputBufferMockup receiver = new SessionInputBufferMockup(input);
        IdentityInputStream instream = new IdentityInputStream(receiver);
        byte[] tmp = new byte[2];
        assertEquals(2, instream.read(tmp, 0, tmp.length));
        assertEquals('a', tmp[0]);
        assertEquals('b', tmp[1]);
        assertEquals('c', instream.read());
        assertEquals(-1, instream.read(tmp, 0, tmp.length));
        assertEquals(-1, instream.read());
        assertEquals(-1, instream.read(tmp, 0, tmp.length));
        assertEquals(-1, instream.read());
    }

    public void testClosedCondition() throws Exception {
        byte[] input = new byte[] {'a', 'b', 'c'};
        SessionInputBufferMockup receiver = new SessionInputBufferMockup(input);
        IdentityInputStream instream = new IdentityInputStream(receiver);

        instream.close();
        instream.close();

        assertEquals(0, instream.available());
        byte[] tmp = new byte[2];
        assertEquals(-1, instream.read(tmp, 0, tmp.length));
        assertEquals(-1, instream.read());
        assertEquals(-1, instream.read(tmp, 0, tmp.length));
        assertEquals(-1, instream.read());
    }

    public void testAvailable() throws Exception {
        byte[] input = new byte[] {'a', 'b', 'c'};
        SessionInputBufferMockup receiver = new SessionInputBufferMockup(input);
        IdentityInputStream instream = new IdentityInputStream(receiver);
        instream.read();
        assertEquals(2, instream.available());
    }

}