Function expect

javascript/2704-to-be-or-not-to-be.js:9–17

(val)

 *   - notToBe(expected): Returns true if val !== expected, otherwise throws an error "Equal".
 */
const expect = (val) => {
    const throwError = (message) => {
        throw new Error(message);
    };
    return {
        toBe: (expected) => val === expected || throwError('Not Equal'),
        notToBe: (expected) => val !== expected || throwError('Equal'),
    };
};

// Example usage:
// expect(5).toBe(5); // returns true