In 05_sumAll: Improve testing to match exercise description

[RedViperPT]

Prerequisites

• I have thoroughly read and understand The Odin Project Contributing Guide
• I have searched the existing issues to ensure this improvement hasn't been suggested before (please have a look through our open issues list to make sure)
• The title of this issue follows the <Location of the improvement>: <Brief description of the improvement> format, e.g. Exercises: Add exercise on XYZ
• (Optional) I am interested in working on this issue and would like to be assigned to it

Improvement Description

While working through the exercise, I noticed that the tests don't check if you're actually adding the numbers between two arbitrary positive integers. It's possible to write a program that just adds all the numbers up to the biggest value given and still pass the tests.

  test('sums numbers within the range', () => {
    expect(sumAll(1, 4)).toEqual(10);
  });
  test('works with large numbers', () => {
    expect(sumAll(1, 4000)).toEqual(8002000);
  });
  test('works with larger number first', () => {
    expect(sumAll(123, 1)).toEqual(7626);
  });

Since all the tests start at 1 you can skip part of the exercise by just finding the biggest value.

This should be easy to fix by either modifying one of the tests or adding a new one.

Acceptance Criteria

• Test verify user is adding between the two given numbers.

(Optional) Additional Comments

No response

[CouchofTomato]

@TheOdinProject/javascript Can someone review please