question: public void testMarkSupported ( ) { byte [ ] data = new byte [ ] { - 127 , - 100 , - 50 , - 10 , - 1 , 0 , 1 , 10 , 50 , 127 } ; TestInputStream tis = new TestInputStream ( data ) ; CipherInputStream cis = new CipherInputStream ( tis , new NullCipher ( ) ) ; assertFalse ( "The returned by markSupported() method value " + "should be false." , cis . markSupported ( ) ) ; }
target:  markSupported() method testing. Tests that mark is not supported.