Tests some regular expressions that were doing the wrong thing with the "find first asserted" optimization. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS /.*(.*)<\/body>.*/.exec("foobarbaz").toString() is "foobarbaz,bar" PASS /\s*\s*/.exec("").toString() is "," PASS successfullyParsed is true TEST COMPLETE