TrackingBytesArrayTest.java

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 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
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 * 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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package org.elasticsearch.hadoop.util;

import java.io.ByteArrayOutputStream;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;


public class TrackingBytesArrayTest {

    private TrackingBytesArray data;

    @Before
    public void init() {
        data = new TrackingBytesArray(new BytesArray(256));
    }

    @After
    public void destroy() {
        data = null;
    }

    @Test
    public void testAddArraySize() throws Exception {
        assertEquals(0, data.length());
        data.copyFrom(new BytesArray("one"));
        assertEquals(3, data.length());
        data.copyFrom(new BytesArray("two"));
        assertEquals(6, data.length());
        data.copyFrom(new BytesArray("three"));
        assertEquals(11, data.length());
    }

    @Test
    public void testAddRefSize() throws Exception {
        BytesRef ref = new BytesRef();
        ref.add(new BytesArray("one"));
        ref.add(new BytesArray("three"));
        data.copyFrom(ref);
        assertEquals(8, data.length());
    }

    @Test
    public void testRemoveSize() throws Exception {
        assertEquals(0, data.length());
        data.copyFrom(new BytesArray("a"));
        data.copyFrom(new BytesArray("bb"));
        data.copyFrom(new BytesArray("ccc"));
        data.copyFrom(new BytesArray("dddd"));
        assertEquals(10, data.length());
        data.remove(1);
        assertEquals(8, data.length());
        data.remove(1);
        assertEquals(5, data.length());
    }

    @Test
    public void testWriteAfterAdding() throws Exception {
        data.copyFrom(new BytesArray("a"));
        data.copyFrom(new BytesArray("bb"));

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        data.writeTo(out);
        assertEquals("abb", out.toString());
    }

    @Test
    public void testWriteAfterRemoving() throws Exception {
        data.copyFrom(new BytesArray("a"));
        data.copyFrom(new BytesArray("bb"));
        data.copyFrom(new BytesArray("ccc"));

        data.remove(1);

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        data.writeTo(out);
        assertEquals("accc", out.toString());
    }
}