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LibJS: Add Object.{isExtensible,preventExtensions}()

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Matthew Olsson 2020-06-01 21:13:16 -07:00 • committed by Andreas Kling
parent daa3f59a55
commit d5ae73a63b
6 changed files with 118 additions and 0 deletions
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22
Libraries/LibJS/Tests/Object.isExtensible.js Normal file
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@ -0,0 +1,22 @@
load("test-common.js");
try {
assert(Object.isExtensible() === false);
assert(Object.isExtensible(undefined) === false);
assert(Object.isExtensible(null) === false);
assert(Object.isExtensible(true) === false);
assert(Object.isExtensible(6) === false);
assert(Object.isExtensible("test") === false);
let s = Symbol();
assert(Object.isExtensible(s) === false);
let o = { foo: "foo" };
assert(Object.isExtensible(o) === true);
Object.preventExtensions(o);
assert(Object.isExtensible(o) === false);
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}