DocumentTest.java

/*
 * Carrot2 project.
 *
 * Copyright (C) 2002-2016, Dawid Weiss, Stanisław Osiński.
 * All rights reserved.
 *
 * Refer to the full license file "carrot2.LICENSE"
 * in the root folder of the repository checkout or at:
 * http://www.carrot2.org/carrot2.LICENSE
 */

package org.carrot2.core;

import org.carrot2.util.tests.CarrotTestCase;
import org.junit.Test;

import org.carrot2.shaded.guava.common.collect.Lists;

import static org.junit.Assert.*;

/**
 * Test cases for {@link Document}.
 */
public class DocumentTest extends CarrotTestCase
{
    @Test
    public void testNoIdentifiers()
    {
        final Document d1 = new Document();
        final Document d2 = new Document();
        final Document d3 = new Document();

        Document.assignDocumentIds(Lists.newArrayList(d1, d2, d3));
        assertThat(d1.id).isEqualTo("0");
        assertThat(d2.id).isEqualTo("1");
        assertThat(d3.id).isEqualTo("2");
    }

    @Test
    public void testNonUniqueIdentifiers()
    {
        final Document d1 = new Document();
        d1.id = "2";
        final Document d2 = new Document();
        final Document d3 = new Document();
        final Document d4 = new Document();
        d4.id = "id5";
        final Document d5 = new Document();

        try {
            Document.assignDocumentIds(Lists.newArrayList(d1, d2, d3, d4, d5));
            fail();
        } catch (IllegalArgumentException e) {
            // expected.
        }
    }

    @Test
    public void testSingleNull()
    {
        final Document d1 = new Document();
        d1.id = "2";
        final Document d2 = new Document();
        try {
            Document.assignDocumentIds(Lists.newArrayList(d1, d2));
            fail();
        } catch (IllegalArgumentException e) {
            // expected.
        }
    }    
}