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LibJS: Implement Object.prototype.propertyIsEnumerable

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Spec: https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable

This is used by core-js, which is used by frameworks such as Vue.
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Luke 2020-12-24 17:51:28 +00:00 • committed by Andreas Kling
parent d46de3aeb4
commit 200c7572b7
4 changed files with 32 additions and 0 deletions
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15
Libraries/LibJS/Tests/builtins/Object/Object.prototype.propertyIsEnumerable.js Normal file
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test("basic functionality", () => {
var o = {};
o.foo = 1;
expect(o.propertyIsEnumerable("foo")).toBeTrue();
expect(o.propertyIsEnumerable("bar")).toBeFalse();
expect(o.propertyIsEnumerable()).toBeFalse();
expect(o.propertyIsEnumerable(undefined)).toBeFalse();
o.undefined = 2;
expect(o.propertyIsEnumerable()).toBeTrue();
expect(o.propertyIsEnumerable(undefined)).toBeTrue();
expect(globalThis.propertyIsEnumerable("globalThis")).toBeFalse();
});