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Test Info:

/* Any copyright is dedicated to the Public Domain.
"use strict";
// See Bug 585991.
const TEST_URI = `data:text/html;charset=utf-8,<!DOCTYPE html>
<head>
<script>
/* Create a prototype-less object so popup does not contain native
* Object prototype properties.
*/
window.foo = Object.create(null);
Object.assign(window.foo, {
item0: "value0",
item1: "value1",
});
</script>
</head>
<body>bug 585991 - autocomplete popup escape key usage test</body>`;
add_task(async function () {
const hud = await openNewTabAndConsole(TEST_URI);
const { jsterm } = hud;
info("web console opened");
const { autocompletePopup: popup } = jsterm;
const onPopUpOpen = popup.once("popup-opened");
info("wait for completion: window.foo.");
setInputValue(hud, "window.foo");
EventUtils.sendString(".");
await onPopUpOpen;
ok(popup.isOpen, "popup is open");
ok(popup.itemCount, "popup has items");
info("press Escape to close the popup");
const onPopupClose = popup.once("popup-closed");
EventUtils.synthesizeKey("KEY_Escape");
await onPopupClose;
ok(!popup.isOpen, "popup is not open after VK_ESCAPE");
is(getInputValue(hud), "window.foo.", "completion was cancelled");
ok(!getInputCompletionValue(hud), "completeNode is empty");
});