node-query/node_modules/es6-shim/test-sham/set-prototype-of.js

25 lines
760 B
JavaScript

describe('Object.setPrototypeOf(o, p)', function () {
it('changes prototype to regular objects', function () {
var obj = {a: 123};
expect(obj instanceof Object).to.equal(true);
// sham requires assignment to work cross browser
obj = Object.setPrototypeOf(obj, null);
expect(obj instanceof Object).to.equal(false);
expect(obj.a).to.equal(123);
});
it('changes prototype to null objects', function () {
var obj = Object.create(null);
obj.a = 456;
expect(obj instanceof Object).to.equal(false);
expect(obj.a).to.equal(456);
// sham requires assignment to work cross browser
obj = Object.setPrototypeOf(obj, {});
expect(obj instanceof Object).to.equal(true);
expect(obj.a).to.equal(456);
});
});