26 lines
780 B
JavaScript
26 lines
780 B
JavaScript
/*global expect */
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describe('Object.setPrototypeOf(o, p)', function () {
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'use strict';
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it('changes prototype to regular objects', function () {
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var obj = {a: 123};
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expect(obj).to.be.an.instanceOf(Object);
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// sham requires assignment to work cross browser
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obj = Object.setPrototypeOf(obj, null);
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expect(obj).not.to.be.an.instanceOf(Object);
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expect(obj.a).to.equal(123);
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});
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it('changes prototype to null objects', function () {
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var obj = Object.create(null);
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obj.a = 456;
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expect(obj).not.to.be.an.instanceOf(Object);
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expect(obj.a).to.equal(456);
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// sham requires assignment to work cross browser
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obj = Object.setPrototypeOf(obj, {});
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expect(obj).to.be.an.instanceOf(Object);
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expect(obj.a).to.equal(456);
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});
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});
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