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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
/**
* Ensure that we don't use an entirely-blank (non-printable) document title
* as the tab label.
*/
add_task(async function test_ensure_printable_label() {
const TEST_DOC = `
<!DOCTYPE html>
<meta charset="utf-8">
<!-- Title is NO-BREAK SPACE, COMBINING ACUTE ACCENT, ARABIC LETTER MARK -->
<title> &%23x0301;&%23x061C;</title>
Is my title blank?`;
let newTab;
function tabLabelChecker() {
Assert.stringMatches(
newTab.label,
/\p{L}|\p{N}|\p{P}|\p{S}/u,
"Tab label should contain printable character."
);
}
let mutationObserver = new MutationObserver(tabLabelChecker);
registerCleanupFunction(() => mutationObserver.disconnect());
gBrowser.tabContainer.addEventListener(
"TabOpen",
event => {
newTab = event.target;
tabLabelChecker();
mutationObserver.observe(newTab, {
attributeFilter: ["label"],
});
},
{ once: true }
);
await BrowserTestUtils.withNewTab("data:text/html," + TEST_DOC, async () => {
// Wait another longer-than-tick to ensure more mutation observer things have
// come in.
await new Promise(executeSoon);
// Check one last time for good measure, for the final label:
tabLabelChecker();
});
});