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How to compare Object.create()? #620
Description
Using Object.create method to create object.
How to compare them for equality or deep equality?
Use Object.getPrototypeOf?
e.g.
var a = Object.create(null);
var b = Object.create({});
assert.deepEqual(a, b);
var a = Object.create({});
var b = Object.create({a:233});
assert.deepEqual(a, b);
Activity
vkurchatkin commentedon Jan 27, 2015
see nodejs/node-v0.x-archive#4523
it's a bug in CommonJS: http://wiki.commonjs.org/wiki/Unit_Testing/1.0
obviously, it had to be
__proto__,[[Prototype]]or something like thischanging this behaviour breaks 3 tests
/cc @iojs/owners
bnoordhuis commentedon Jan 27, 2015
I'm alright with fixing it.
assert.deepEqual({}, [])doesn't throw. That's clearly a bug.fundon commentedon Jan 27, 2015
@vkurchatkin thanks, great work.
assert: check object prototype in `deepEqual`
assert: introduce `deepStrictEqual`
vkurchatkin commentedon Feb 9, 2015
you can use
deepStrictEqualintroduced in 3f473ef, which compares prototypes using===fundon commentedon Feb 9, 2015
Thanks, great.
jokeyrhyme commentedon Mar 3, 2015
I just noticed that this does NOT throw:
Weird.
vkurchatkin commentedon Mar 4, 2015
@jokeyrhyme use
deepStrictEqual