How to test "instance of" relationship with node test runner assert?

[varunkamra]

In Jest we have an assertion like this:

 expect(x).toBeInstanceOf(y);

Is there a way to test this with node test runner assert?

node version: 20.9 LTS

[JimmyDaddy]

You can try this

// if y is a instance of some class
assert.ok(x instanceof y.constructor);
// if y is a class
assert.ok(x instanceof y);

jest expect.toBeInstanceOf

[varunkamra]

Thank you, this one worked for me.

assert(x instanceof y);