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

package org.apache.commons.lang;

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import junit.framework.*;
import junit.textui.TestRunner;
/**
 * Unit tests {@link org.apache.commons.lang.RandomStringUtils}.
 *
 * @author <a href="mailto:steven@caswell.name">Steven Caswell</a>
 * @author <a href="mailto:ridesmet@users.sourceforge.net">Ringo De Smet</a>
 * @version $Id: RandomStringUtilsTest.java,v 1.1 2002/07/19 03:35:55 bayard Exp $
 */
public class RandomStringUtilsTest extends junit.framework.TestCase {
    /**
     * Construct a new instance of RandomStringUtilsTest with the specified name
     */
    public RandomStringUtilsTest(String name) {
        super(name);
    }

    public static Test suite() {
    	TestSuite suite = new TestSuite(RandomStringUtilsTest.class);
    	suite.setName("RandomStringUtils Tests");
        return suite;
    }
    
    /**
     * Set up instance variables required by this test case.
     */
    public void setUp() {
    }
    
    /**
     * Tear down instance variables required by this test case.
     */
    public void tearDown() {
    }
    
    /**
     * Test the implementation
     */
    public void testRandomStringUtils() {
        String r1 = RandomStringUtils.random(50);
        assertEquals("random(5) length", 50, r1.length());
        String r2 = RandomStringUtils.random(50);
        assertEquals("random(5) length", 50, r2.length());
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
        
        r1 = RandomStringUtils.randomAscii(50);
        assertEquals("randomAscii(10) length", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertTrue("char between 32 and 127", (int) r1.charAt(i) >= 32 && (int) r1.charAt(i) <= 127);
        }        
        r2 = RandomStringUtils.randomAscii(50);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));

        r1 = RandomStringUtils.randomAlphabetic(50);
        assertEquals("randomAlphabetic(50)", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertEquals("r1 contains alphabetic", true, Character.isLetter(r1.charAt(i)) && !Character.isDigit(r1.charAt(i)));
        }
        r2 = RandomStringUtils.randomAlphabetic(50);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
        
        r1 = RandomStringUtils.randomAlphanumeric(50);
        assertEquals("randomAlphanumeric(50)", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertEquals("r1 contains alphanumeric", true, Character.isLetterOrDigit(r1.charAt(i)));
        }
        r2 = RandomStringUtils.randomAlphabetic(50);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
        
        r1 = RandomStringUtils.randomNumeric(50);
        assertEquals("randomNumeric(50)", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertEquals("r1 contains numeric", true, Character.isDigit(r1.charAt(i)) && !Character.isLetter(r1.charAt(i)));
        }
        r2 = RandomStringUtils.randomNumeric(50);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
        
        String set = "abcdefg";
        r1 = RandomStringUtils.random(50, set);
        assertEquals("random(50, \"abcdefg\")", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertTrue("random char in set", set.indexOf(r1.charAt(i)) > -1);
        }
        r2 = RandomStringUtils.random(50, set);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
        
        set = "stuvwxyz";
        r1 = RandomStringUtils.random(50, set.toCharArray());
        assertEquals("random(50, \"stuvwxyz\")", 50, r1.length());
        for(int i = 0; i < r1.length(); i++) {
            assertTrue("random char in set", set.indexOf(r1.charAt(i)) > -1);
        }
        r2 = RandomStringUtils.random(50, set);
        assertTrue("!r1.equals(r2)", !r1.equals(r2));
    }

    public static void main(String args[]) {
        TestRunner.run(suite());
    }
}