question: void testString ( ) { String a = randomString ( ) ; if ( returnNew ) { String b = StringUtils . fromCacheOrNew ( a ) ; try { assertEquals ( a , b ) ; } catch ( Exception e ) { TestBase . logError ( "error" , e ) ; } if ( a != null && a == b && a . length ( ) > 0 ) { throw new AssertionError ( "a=" + System . identityHashCode ( a ) + " b=" + System . identityHashCode ( b ) ) ; } } else { String b ; if ( useIntern ) { b = a == null ? null : a . intern ( ) ; } else { b = StringUtils . cache ( a ) ; } try { assertEquals ( a , b ) ; } catch ( Exception e ) { TestBase . logError ( "error" , e ) ; } } }
target:  Test one string operation using the string cache.