In groovy it seems to be generating random tests of strings that are not divisible by 8 - is this intended and we need to code to remove incomplete bits (but then... how do we know where which bit starts and ends and what is valid?). Seems like an error.

My code passes fixed tests but not random because of this.

not sure why this was marked solved, just did this in groovy and had the same issue. Setting as a float, which is a requirement in the instructions, causes it to fail. Perhaps an explanation of why it was marked resolved would be nice ie a groovy bug, but, its 5 years old, not sure its a groovy bug? ¯_(ツ)_/¯

seem to have another instance of groovy random tests failing even though the actual tests pass

Random tests
assert sumMul(n, m) == sol(n, m)
       |      |  |  |  |   |  |
       |      53 |  |  |   53 721689
       618373112 |  |  4913340408
                 |  false
                 721689