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"use strict";
// Test browsing-context-active-change notification which is fired on the parent process
// to know when a BrowsingContext becomes visible/hidden.
const TEST_PATH =
getRootDirectory(gTestPath).replace(
// eslint-disable-next-line @microsoft/sdl/no-insecure-url
) + "dummy_page.html";
const TOPIC = "browsing-context-active-change";
async function waitForActiveChange() {
return new Promise(resolve => {
function observer(subject, topic) {
is(topic, TOPIC, "observing correct topic");
ok(
BrowsingContext.isInstance(subject),
"subject to be a BrowsingContext"
);
Services.obs.removeObserver(observer, TOPIC);
resolve();
}
Services.obs.addObserver(observer, TOPIC);
});
}
add_task(async function () {
const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser);
const browser = tab.linkedBrowser;
let onActiveChange = waitForActiveChange();
browser.docShellIsActive = false;
await onActiveChange;
is(
browser.browsingContext.isActive,
false,
"The browsing context is no longer active"
);
onActiveChange = waitForActiveChange();
browser.docShellIsActive = true;
await onActiveChange;
is(
browser.browsingContext.isActive,
true,
"The browsing context is active again"
);
BrowserTestUtils.removeTab(tab);
});