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Test Info:
- Manifest: layout/base/tests/browser.toml
const { PromptTestUtils } = ChromeUtils.importESModule(
);
function pageScript() {
window.addEventListener(
"beforeunload",
function (event) {
var str = "Some text that causes the beforeunload dialog to be shown";
event.returnValue = str;
return str;
},
true
);
}
SpecialPowers.pushPrefEnv({
set: [["dom.require_user_interaction_for_beforeunload", false]],
});
const PAGE_URL =
"data:text/html," +
encodeURIComponent("<script>(" + pageScript.toSource() + ")();</script>");
add_task(async function enableDialogs() {
// The onbeforeunload dialog should appear.
let dialogPromise = PromptTestUtils.waitForPrompt(null, {
modalType: Services.prompt.MODAL_TYPE_CONTENT,
promptType: "confirmEx",
});
let openPagePromise = openPage(true);
let dialog = await dialogPromise;
Assert.ok(true, "Showed the beforeunload dialog.");
await PromptTestUtils.handlePrompt(dialog, { buttonNumClick: 0 });
await openPagePromise;
});
add_task(async function disableDialogs() {
// The onbeforeunload dialog should NOT appear.
await openPage(false);
info("If we time out here, then the dialog was shown...");
});
async function openPage(enableDialogs) {
// Open about:blank in a new tab.
await BrowserTestUtils.withNewTab(
{ gBrowser, url: "about:blank" },
async function (browser) {
// Load the page.
BrowserTestUtils.startLoadingURIString(browser, PAGE_URL);
await BrowserTestUtils.browserLoaded(browser);
// Load the content script in the frame.
let methodName = enableDialogs ? "enableDialogs" : "disableDialogs";
await SpecialPowers.spawn(browser, [methodName], async function (name) {
content.windowUtils[name]();
});
// And then navigate away.
await BrowserTestUtils.browserLoaded(browser);
}
);
}