NullInputStreamTests.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.test.utility.io;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.eclipse.persistence.tools.workbench.test.utility.TestTools;
import org.eclipse.persistence.tools.workbench.utility.io.NullInputStream;


public class NullInputStreamTests extends TestCase {
    private InputStream nullInputStream;

    public static Test suite() {
        return new TestSuite(NullInputStreamTests.class);
    }

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

    protected void setUp() throws Exception {
        super.setUp();
        this.nullInputStream = NullInputStream.instance();
    }

    protected void tearDown() throws Exception {
        TestTools.clear(this);
        super.tearDown();
    }

    public void testAvailable() throws IOException {
        assertEquals(0, this.nullInputStream.available());
    }

    public void testClose() throws IOException {
        this.nullInputStream.close();
    }

    public void testMark() {
        this.nullInputStream.mark(5);
    }

    public void testMarkSupported() {
        assertFalse(this.nullInputStream.markSupported());
    }

    public void testRead() throws IOException {
        assertEquals(-1, this.nullInputStream.read());
    }

    public void testReadByteArray() throws IOException {
        byte[] expected = new byte[10];
        Arrays.fill(expected, (byte) 7);
        byte[] actual = new byte[10];
        Arrays.fill(actual, (byte) 7);
        assertEquals(-1, this.nullInputStream.read(actual));
        assertTrue(Arrays.equals(actual, expected));
    }

    public void testReadByteArrayIntInt() throws IOException {
        byte[] expected = new byte[10];
        Arrays.fill(expected, (byte) 7);
        byte[] actual = new byte[10];
        Arrays.fill(actual, (byte) 7);
        assertEquals(-1, this.nullInputStream.read(actual, 2, 5));
        assertTrue(Arrays.equals(actual, expected));
    }

    public void testReset() {
        boolean exCaught = false;
        try {
            this.nullInputStream.reset();
        } catch (IOException ex) {
            exCaught = true;
        }
        assertTrue(exCaught);
    }

    public void testSkip() throws IOException {
        assertEquals(0, this.nullInputStream.skip(5));
    }

}