The JavaScript instructions have an issue. It states that the input is a string, yet for two tests a boolean is provided. Removing the booleans or changing the instructions to say the input can be either a string or a boolean would fix the issue.

Is a trivial solution that only some number of engineers know about on a difficulty rating 7 problem a bad thing? What percentage of the engineers who are familiar with the implimentation of that solution do you think would have difficulty solving the problem without using that solution?

Wouldn't there be a case made for a more challenging version of the problem where the trivial solution wasn't possible (and more context within the instructions to clarify differences between thw two)?

JavaScript version. My code works fine in Atom. When I run the sample tests here I get this failure:

Test Results:
Solution
should test for something
This is just an example of how you can write your own TDD tests - Expected: 'expected', instead got: 'actual'

Is there a mystery direction that requires I also write some tests for this!?

When I submit my code it works fine. The error only exists for the sample tests.