Custom test without node using pure javascript

Hey, I just tried to create my own test function which kind of similar to the Jest library.
Have been testing for 5 statements below and yet to find any failure.
But for now, it only have 2 functional tests which is expect(value).toBe(other) and expect(value).toEqual(something).

Let me see what do you guys think about this kind of stuff. Is it worth it?

Below is the implementation of the tests

```
function check(current,other){
if(typeof other !== 'object' && typeof current !== 'object') return current === other;
let equal = false;
for(let prop in other){
if(current[prop] === undefined) throw new Error("FAILED");
equal = equal || check(current[prop],other[prop]);
}
if(!equal) throw new Error("FAILED");
return equal;
}

function test(comment,callback){
let error;
try{
//execute the tests;
callback();
}catch(e){
// Get the result whether it passed or failed
error = e.message;
}
console.log(comment,error === "FAILED" ? "FAILED" : "PASSED");
}

function expect(value){
this.toBe = function(other){
if(value !== other) throw new Error("FAILED");
}
this.toEqual = function(something){
check(value,something);
}
return this;
}

// The tests start HERE

test('Is 2+2 be 4?',() => {
expect(2 + 2).toBe(4); // returns : Is 2+2 be 4? PASSED
});

test('Is 2+3 be 4?',() => {
expect(2 + 3).toBe(4); // returns : Is 2+3 be 4? FAILED
});

test('Is {value:3*3} equal {value:9}?',() => {
expect({value:3*3}).toEqual({value:9}); // returns : Is {value:3*3} equal {value:9}? PASSED
});

test('Is {value:2*3} equal {value:9}?',() => {
expect({value:2*3}).toEqual({value:9}); // returns : Is {value:2*3} equal {value:9}? FAILED
});

test('Is {value:{arr:[6]}} equal {value:9}?',() => {
expect({value:{arr:[6]}}).toEqual({value:9}); // Is {value:{arr:[6]}} equal {value:9}? FAILED
});
```

La issue contiene un’implementazione inline di una funzione di test JavaScript, ma non indica file del repository, test o punti di ingresso. Occorre prima chiarire se questa debba diventare una funzionalità del progetto e definirne l’ambito; per completarla sarebbero necessari un luogo di implementazione concordato e test per il comportamento proposto.

Scritto dal modello di indicizzazione a partire dal testo della issue.