runTest tests are generating false-positives

[saadtazi]

I found out that this line is causing problem: some runTest tests that are suppose to fail are not failing because you are comparing 0 with 0 because isNaN('a string') or isNaN([1, 2]) returns true: all the tests that tries to compare strings or arrays are not valid.

repro step:
Try to modify any runTest test in test/string_operators.js or test/array_operators.js to make it fail (hint: it won't!).

I think the proper way to fix it is to do the following:

-          if (isNaN(actual) && isNaN(expected)) actual = expected = 0
+          if (actual !== actual && expected !== expected) actual = expected = 0

because NaN === NaN returns false.

There are 3 tests that fails with the suggested changes, 2 related to unicode characters and string operators, that I am not sure how to solve.

[kofrasa]

Thanks.

Your fix is correct. I skipped the fact that other types with isNaN evaluate to true.

Will look at and address the broken operators