Is this deep-true method recommended to ensure that both score types === 'number' instead of 'string'?

Because when I wrote the kata, I felt that encouraging people to look at the documentation and write their own tests was appropriate for the level.

Basic Test Case:

describe("Example Tests", function () {
  it("Example Test Case", function () {
    Test.assertEquals(add(1, 1), 2, "optional message");
  });
});

https://docs.codewars.com/languages/javascript/codewars-test/