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Java Source Code / Java Documentation » Library » Apache common lang » org.apache.commons.lang 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.commons.lang.RandomStringUtilsTest

RandomStringUtilsTest
public class RandomStringUtilsTest extends junit.framework.TestCase (Code)
Unit tests org.apache.commons.lang.RandomStringUtils .
author:
   Steven Caswell
author:
   Ringo De Smet
author:
   Phil Steitz
version:
   $Id: RandomStringUtilsTest.java 437554 2006-08-28 06:21:41Z bayard $



Constructor Summary
public  RandomStringUtilsTest(String name)
    

Method Summary
public static  voidmain(String args)
    
public  voidsetUp()
     Set up instance variables required by this test case.
public static  Testsuite()
    
public  voidtearDown()
     Tear down instance variables required by this test case.
public  voidtestConstructor()
    
public  voidtestExceptions()
    
public  voidtestLang100()
     Checks if the string got by RandomStringUtils.random(int) can be converted to UTF-8 and back without loss.
public  voidtestRandomAlphaNumeric()
    
public  voidtestRandomAlphabetic()
    
public  voidtestRandomAscii()
    
public  voidtestRandomNumeric()
    
public  voidtestRandomStringUtils()
    
public  voidtestRandomStringUtilsHomog()
     Test homogeneity of random strings generated -- i.e., test that characters show up with expected frequencies in generated strings.


Constructor Detail
RandomStringUtilsTest
public RandomStringUtilsTest(String name)(Code)
Construct a new instance of RandomStringUtilsTest with the specified name




Method Detail
main
public static void main(String args)(Code)



setUp
public void setUp()(Code)
Set up instance variables required by this test case.



suite
public static Test suite()(Code)



tearDown
public void tearDown()(Code)
Tear down instance variables required by this test case.



testConstructor
public void testConstructor()(Code)



testExceptions
public void testExceptions()(Code)



testLang100
public void testLang100() throws Exception(Code)
Checks if the string got by RandomStringUtils.random(int) can be converted to UTF-8 and back without loss.
author:
   stefanhoehne@fastmail.fm
throws:
  Exception -



testRandomAlphaNumeric
public void testRandomAlphaNumeric()(Code)
Make sure boundary alphanumeric characters are generated by randomAlphaNumeric This test will fail randomly with probability = 6 * (61/62)**1000 ~ 5.2E-7



testRandomAlphabetic
public void testRandomAlphabetic()(Code)
Make sure boundary alpha characters are generated by randomAlphabetic This test will fail randomly with probability = 4 * (51/52)**1000 ~ 1.58E-8



testRandomAscii
public void testRandomAscii()(Code)
Make sure 32 and 127 are generated by randomNumeric This test will fail randomly with probability = 2*(95/96)**1000 ~ 5.7E-5



testRandomNumeric
public void testRandomNumeric()(Code)
Make sure '0' and '9' are generated by randomNumeric This test will fail randomly with probability = 2 * (9/10)**1000 ~ 3.5E-46



testRandomStringUtils
public void testRandomStringUtils()(Code)
Test the implementation



testRandomStringUtilsHomog
public void testRandomStringUtilsHomog()(Code)
Test homogeneity of random strings generated -- i.e., test that characters show up with expected frequencies in generated strings. Will fail randomly about 1 in 1000 times. Repeated failures indicate a problem.



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