Recursive Methods: Testing with Jest #27265
Description
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- This is not a duplicate of an existing issue (please have a look through our open issues list to make sure)
- I have thoroughly read and understand The Odin Project Contributing Guide
- Would you like to work on this issue?
Describe your suggestion
The website linked for solving recursive problems (9 problems in NodeJS path) (7 problems in Ruby path) would be better suited as an exercise in my opinion that users can fork and test using jest.
NodeJS Path
We can create 9 new exercise folders in javascript-exercises repository that will have a README.md, exercise.js, exercise.spec.js, and a solutions folder containing the solution and the solution spec, similar to the first 12 exercises.
Below is an example of how the first exercise could be added.
Exercise 13 - sumRange
README.md
Implement a recursive function that will take a number and return the sum of all numbers from 1 up to to the number passed in.
sumRange(5) // should add 1 + 2 + 3 + 4 + 5 and return 15sumRange.js
const sumRange = function() {
};
// Do not edit below this line
module.exports = sumRange;sumRange.spec.js
const sumRange = require('./sumRange')
describe('sumRange', () => {
test('Sums numbers in a small range', () => {
const range = 4;
expect(sumRange(range)).toBe(10);
});
test('Sums numbers in a large range', () => {
const range = 100;
expect(sumRange(range)).toBe(5050);
});
test('Returns undefined for negative range', () => {
const range = -3;
expect(sumRange(range)).toBe(undefined);
});
test('Returns undefined for non integer range', () => {
const range = 3.7;
expect(sumRange(range)).toBe(undefined);
});
});sumRange-solution.js
function sumRange(num){
if (!Number.isInteger(num) || num < 0) return undefined;
if(num === 1) return 1;
return num + sumRange(num - 1);
}
module.exports = sumRange;Ruby path
Similarly, we can create a new folder in the Ruby path repository ruby-exercises to align with the current structure of that repository called 'ruby_recursive' and place the recursive problems there.
Path
Ruby / Rails, Node / JS
Lesson Url
https://www.theodinproject.com/lessons/ruby-recursive-methods
(Optional) Discord Name
Revenco
(Optional) Additional Comments
No response