src/test/org/apache/commons/lang/WordWrapUtilsTest.java

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package org.apache.commons.lang;

import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;

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

/**
 * Unit tests for the wrap methods of WordWrapUtils.
 * 
 * @author <a href="mailto:ridesmet@users.sourceforge.net">Ringo De Smet</a>
 * @author Henri Yandell
 * @author Stephen Colebourne
 * @version $Id: WordWrapUtilsTest.java,v 1.3 2003/07/30 22:21:39 scolebourne Exp $
 */
public class WordWrapUtilsTest extends TestCase {

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

    public static Test suite() {
        TestSuite suite = new TestSuite(WordWrapUtilsTest.class);
        suite.setName("WordWrapperTests");
        return suite;
    }

    //-----------------------------------------------------------------------
    public void testConstructor() {
        assertNotNull(new WordWrapUtils());
        Constructor[] cons = WordWrapUtils.class.getDeclaredConstructors();
        assertEquals(1, cons.length);
        assertEquals(true, Modifier.isPublic(cons[0].getModifiers()));
        assertEquals(true, Modifier.isPublic(WordWrapUtils.class.getModifiers()));
        assertEquals(false, Modifier.isFinal(WordWrapUtils.class.getModifiers()));
    }
    
    //-----------------------------------------------------------------------
    /**
     * Wrap text. This is the most general use.
     */
    public void testWrapText1() {
        String input =
                "Here is one line of text that is going to be wrapped after 20 columns.";
        String expected =
                "Here is one line of\ntext that is going\nto be wrapped after\n20 columns.";
        assertEquals("Text didn't wrap correctly, ", expected, WordWrapUtils.wrapText(input, "\n", 20));
    }

    /**
     * Wrap text with a tab character in the middle of a string.
     */
    public void testWrapText2() {
        String input =
                "Here is\tone line of text that is going to be wrapped after 20 columns.";
        String expected =
                "Here is\tone line of\ntext that is going\nto be wrapped after\n20 columns.";
        assertEquals("Text with tab didn't wrap correctly, ", expected, WordWrapUtils.wrapText(input, "\n", 20));
    }

    /**
     * Wrap text with a tab character located at the wrapping column index.
     */
    public void testWrapText3() {
        String input =
                "Here is one line of\ttext that is going to be wrapped after 20 columns.";
        String expected =
                "Here is one line\nof\ttext that is\ngoing to be wrapped\nafter 20 columns.";
        assertEquals("Text with tab at wrapping index didn't wrap correctly, ", expected, WordWrapUtils.wrapText(input, "\n", 20));
    }

    public void testWrapText4() {
        assertEquals(null, WordWrapUtils.wrapText(null, "\n", 20));
        assertEquals("", WordWrapUtils.wrapText("", "\n", 20));
    }
}