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Haskell translation

Java traduction

Fixed tests in C# is commented out for no reason

Python: random tests cannot test 0, which contradicts the description. Should be included in fixed tests too.

Haskell basic log tests are incomprehensible, or basic tests are broken.

Falsifiable (after 1 test):
  0 expected 3074457345618258602 but got 0

What's the input? How could the test expect 3074457345618258602, without a single comma?

The guaranteed constraint should be: 0 <= n <= 2147483647

After I submitted my solution,I got the message:'TypeError: Object 1 has no method 'slice' at groupByCommas'
However,it was no problem when I ran code at local environment,and the result satisfied all the conditions of the cases that author offered.I have no idea about this message,who can help me???

The sample test cases should use Test.assert_equals instead of Test.expect.