The kata specifies "polygons" but the tests only contains triangles and quads. There should be generic polygons with more sides.

Done. Thanks for feedback.

Random tests should be added.

duplicate (and even some others in there, I bet).

You should unpublish your kata, thx.

That is creative. I'll put the random tests back in.

Removing random tests is a bad idea.

https://www.codewars.com/kata/reviews/5f3aeef19ece19000123c502/groups/5f3ba73c9ece190001dcaafc

Got rid of the random tests. Also add some edge cases for test for empty string, and is the string contains letters.

No random tests.

Thanks for the report, changed it over to use NUnit

tests/Fixture.cs(1,7): error CS0246: The type or namespace name 'Xunit' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(5,6): error CS0246: The type or namespace name 'TheoryAttribute' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(5,6): error CS0246: The type or namespace name 'Theory' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(6,6): error CS0246: The type or namespace name 'InlineDataAttribute' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(6,6): error CS0246: The type or namespace name 'InlineData' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(7,6): error CS0246: The type or namespace name 'InlineDataAttribute' could not be found (are you missing a using directive or an assembly reference?)
tests/Fixture.cs(7,6): error CS0246: The type or namespace name 'InlineData' could not be found (are you missing a using directive or an assembly reference?)

Sample tests are broken.