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Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
"use strict";
Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
registerCleanupFunction(() => {
Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
});
add_task(
threadFrontTest(async ({ threadFront, debuggee }) => {
const packet = await executeOnNextTickAndWaitForPause(
() => evalCode(debuggee),
threadFront
);
const [grip] = packet.frame.arguments;
await threadFront.resume();
strictEqual(grip.class, "Array", "The grip has an Array class");
const { items } = grip.preview;
strictEqual(items[0], null, "The empty slot has null as grip preview");
deepEqual(
items[1],
{ type: "undefined" },
"The undefined value has grip value of type undefined"
);
})
);
function evalCode(debuggee) {
debuggee.eval(
// These arguments are tested.
// eslint-disable-next-line no-unused-vars
function stopMe(arr) {
debugger;
}.toString()
);
debuggee.eval("stopMe([, undefined])");
}