"Writing a testcase for this would have required complicated thinking and coding which would be as likely to contain an error as it was likely for the code to b

"Writing a testcase for this would have required complicated thinking and coding which would be as likely to contain an error as it was likely for the code to be tested to contain an error." i don't know the details, by why couldn't you just collect a million bits of supposedly random data from the generator and run it through the nist test suite? it's true that testing for randomness does require complicated thinking, but fortunately it's been done. standing on the shoulders of giants and whatnot.