// Returns when a new page is loaded and returns whether that page is an
// error page.
async function pollForPage(win) {
while (true) {
try {
// When we do our navigation, there may be an interstitial about:blank
// page if the navigation involves a process switch. That about:blank
// will exist between the new process's docshell being created and the
// actual page that's being loaded loading (which can happen async from
// the docshell creation). We want to avoid treating the initial
// about:blank as a new page.
//
// We could conceivably expose Document::IsInitialDocument() as a
// ChromeOnly thing and use it here, but let's just filter out all
// about:blank, since we don't expect any in this test. var haveNewPage = await SpecialPowers.spawn(w, [token],
currentToken => this.content.token != currentToken &&
this.content.location.href != "about:blank");
if (haveNewPage) {
++token;
assignToken(token);
// In this test, error pages are non-same-origin with us, and non-error
// pages are same-origin.
let haveErrorPage = false;
try {
win.document.title;
} catch (ex) {
haveErrorPage = true;
}
return haveErrorPage;
}
} catch (e) {
// Something went wrong; just keep waiting.
}
await delay(100);
}
}
async function windowLoaded() {
// The code under here should only be run once
// The test popup window workingURL was already opened
if (isWindowLoaded)
return;
isWindowLoaded = true;
assignToken(token);
/* 2. We have successfully loaded a page, now go to a faulty URL */
// XXX The test fails when we change the location synchronously
window.setTimeout(function() {
w.location.href = faultyURL;
}, 0);
ok(await pollForPage(w), "Waiting for error page succeeded");
/* 3. now, while we are on the error page, navigate back */
try {
// We need the SpecialPowers bit, because this is a cross-origin window
// and we normally can't touch .history on those.
await SpecialPowers.spawn(w, [], () => this.content.history.back());
} catch (ex) {
ok(false, "w.history.back() threw " + ex);
}
ok(!await pollForPage(w), "Waiting for original page succeeded");
/* 4-finish, check we are back at the original page */
is(await SpecialPowers.spawn(w, [], () => this.content.location.href),
workingURL, "Is on the previous page");
w.close();
SimpleTest.finish();
}
function startTest() {
/* 1. load a URL that leads to an error page */
w = window.open(workingURL);
}
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