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
});
```

The issue contains an inline JavaScript test-function implementation but names no repository files, tests, or entry points. First clarify whether this should become a project feature and define its scope; completion would require an agreed implementation location and tests for the proposed behavior.

Written by the indexing model from the issue text.