263-addg

addg

Interview question of the issue #263 of rendezvous with cassidoo.

The Question

Write a set of tests for a function that adds numbers from many invocations, until it sees an empty invocation. Consider edge cases, side effects, incorrect usage of the function, and expected values!

Function to test:

function addg(a) {
    if (a === undefined) return a;
    return function g(b) {
        if (b !== undefined) {
            return addg(a+b);
        }
        return a;
    };
}

// Example usage:
/*
  addg()           // undefined
  addg(2)()        // 2
  addg(2)(7)()     // 9
  addg(3)(4)(0)()  // 7
*/

Installing & Running

Just pnpm i to install all dependencies and then pnpm t to run the tests!