CS:
I think the labeling in the error message is reversed for the following tests: RandomBig, RandomFull, RandomTestsAlmostEmpty, and RandomTestsManyShare

Example:
RandomTestsAlmostEmpty

Test Failed
Expected: null

But was: < 66, 16, 4, 55, 76, 55, 36, 5, 34, 1, 35, 57, 60, 86, 6, 12, 16, 66, 60, 26, 19, 84, 40, 66, 26, 43, 26, 60, 26, 66, 43, 23, 77, 26, 50, 23, 66, 60, 74, 88, 43, 23, 12, 38, 6, 60, 85, 43, 57, 60, 6, 38, 21, 32, 20, 50, 74, 50, 50, 16, 40, 6, 2, 79, 43, 6, 66, 83, 77, 79, 12, 66, 2, 66, 32, 43, 40, 50, 26, 79, 86, 57, 6, 21, 79, 12, 43, 36 >

approved by someone

These sorting algorthims are always so sophisticated to program.

Approved by 🧙

C# Translation

I agree with Johan on this one. The performance constraints are tedious. Also, when adding performance constraints you should at least have a section in the description describing those constraints.

You allow mutation of input to interfere with test cases.

Apparently 'groupBy' is supposed to keep the order of the input data. But with 'orderBy' entries with the same key should get a different order? That makes no sense in my opinion. What is the logic that 'scientific' must be before 'teacher'?

var persons = [
  {name: 'Peter', profession: 'teacher', age: 20, maritalStatus: 'married'},
  {name: 'Michael', profession: 'teacher', age: 50, maritalStatus: 'single'},
  {name: 'Peter', profession: 'teacher', age: 20, maritalStatus: 'married'},
  {name: 'Anna', profession: 'scientific', age: 20, maritalStatus: 'married'},
  {name: 'Rose', profession: 'scientific', age: 50, maritalStatus: 'married'},
  {name: 'Anna', profession: 'scientific', age: 20, maritalStatus: 'single'},
  {name: 'Anna', profession: 'politician', age: 50, maritalStatus: 'married'}
];

Test.assertSimilar(query().select(professionCount).from(persons).groupBy(profession).orderBy(naturalCompare).execute(), [["politician",1],["scientific",3],["teacher",3]]);

same. realistically a league wouldn't contain such large amount of teams

Nice kata:)

When I Test my Code locally, it passes all Tests, but when i test it on Browser it just fails at test example3. I cant see any way how to debug the test and I cant understand any of the logs. Could you please correct this issue?

You have to return a list.

Some of these tests are a little excessive. I am passing all the sample tests, but can't pass the final tests and can't compare because they're all too long to read and just say, "and x others"