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LibJS: Throw TypeError on write to non-writable property in strict mode

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Idan Horowitz 2021-06-06 00:43:03 +03:00 • committed by Linus Groh
parent 31534055e4
commit 2a8f4f097c
3 changed files with 15 additions and 0 deletions
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12
Userland/Libraries/LibJS/Tests/non-writable-assignment.js Normal file
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test("normal mode", () => {
expect(() => {
NaN = 5; // NaN is a non-writable global variable
}).not.toThrow();
});
test("strict mode", () => {
expect(() => {
"use strict";
NaN = 5; // NaN is a non-writable global variable
}).toThrowWithMessage(TypeError, "Cannot write to non-writable property 'NaN'");
});