#415 test and expect

medium

javascript

testing

jest

Most JavaScript projects use testing frameworks like Jest or Mocha that provide functions such as test and expect.

Your task is to implement a very minimal testing utility that mimics this behavior:

Implement a global test(name, fn) function that:
- Runs the function fn.
- Logs ✅ if the test passes.
- Logs ❌ if the test fails.
Implement a global expect(received) function that returns an object with:
- toBe(expected) → asserts strict equality.
- toEqual(expected) → asserts deep equality (recursive object/array check).

test('addition works', () => {
  expect(1 + 2).toBe(3);
});

test('array equality', () => {
  expect([1, 2, 3]).toEqual([1, 2, 3]);
});

Output:

✅ addition works
✅ array equality

If a test fails, it should show ❌ with the test name.