Node 18, chai assertions, instanceof checks, sample tests and better initial code (author gone)

debatable as to whether this is good practice or not, but history proved you wrong by adding full-fledged classes to JavaScript, with private and static properties

"missing test cases" when you click test and then the solution passes when you click submit
JS version of this should not exist
really hated this.

Node v12 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

No random tests

No sample tests

This is definitely not a 7 Kyu.

Внизу некоторые кексы пишут, что это трудно применимо к языку.
Возможно, но ката интересная, очень рекомендую гуглить)) Успехов!

The Javascript version of this kata should be deleted!

Javascript isn't Java, not even a classical language. So, when there are no classes, and instances of classes, but only objects, what use is the singleton pattern? When you need only a single object with certain properties, then only create one.

Nice kata. I'm one step closer now to comprehending the strange intricacies of javascript prototypical object system.

You could add sample tests

var obj1 = new Singleton();
var obj2 = new Singleton();

obj1.test = 1;

Test.assertEquals(obj2, obj1);
Test.assertEquals(obj2.test, obj1.test);
Test.expect(obj1 instanceof Singleton);

hi, just wondering if no error detected for the code should it pass or not? because it is not passing eventhough (obj1 === obj2) is true and obj2.test is = 1.

thanks

Sam