You can limit the length of the code, which should be the fundamental requirement for this kata.

Due to long-standing unresolved issues, insufficient tests, close to being a duplicate, missing details of specification, this kata is meant for retirement.
See this discussion for details: https://github.com/codewars/content-issues/issues/174 .

• Node 14 should be enabled

• logs in tests should be removed

• Description does not mention anything about how to handle numbers

• Not enough example tests and sample tests

• Duplicate of this + splitting string into n chunk katas

• the order of the operations isn't properly tested. There are a lot of different approaches that all pass the tests (ex: I'm reducing from left to right while some others are performing all additions, then all subs, then...)
• Make sure to handle large numbers => not tested
• the kind of division used isn't specified (integer or not ; and if that doesn't matter, it should be said too).

This kata is practically a duplicate of this one.

Mention uppercase strings in the instructions please!

Tests are not actually displaying the expected answer.
'1234567890' should equal <bound method Phone.number of <solution.Phone object at 0x7fa358dfd5e0>>
Please fix.

Should be considered a duplicate: there are other similar katas, with translations and higher quality;
e.g.:
https://www.codewars.com/kata/525f50e3b73515a6db000b83
https://www.codewars.com/kata/525f47c79f2f25a4db000025

new test framework shouldbe used

• No random tests

• Node 12. should be enabled

• Duplicate and maybe moreee

Ruby 3.0 should be enabled, see this to learn how to do it

How does 1000 equal ["cats", "chocolate", "pollen", "strawberries"]. I understand bitwise calculation. But then after that also I dont understand how it will equal to that result. Can anyone help me understand?

No random tests.