mozilla-central/dom/base/test/test_blockParsing.html

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Test Info: Warnings

<!DOCTYPE HTML>
<html>
<head>
<title>Test for document.blockParsing</title>
</head>
<body>
<script>
const {TestUtils} = ChromeUtils.importESModule(
);
async function runTest(url, initialHTML, finalHTML) {
let iframe = document.createElement("iframe");
iframe.src = url;
let blockerPromise;
let promise = TestUtils.topicObserved("document-element-inserted", document => {
if (document !== iframe.contentDocument) {
return false;
}
blockerPromise = new Promise(resolve => {
setTimeout(resolve, 0);
}).then(() => {
return new Promise(resolve => setTimeout(resolve, 0));
}).then(() => {
return new Promise(resolve => setTimeout(resolve, 0));
});
is(document.documentElement.outerHTML, initialHTML,
"Should have initial HTML during document-element-inserted");
is(document.defaultView.wrappedJSObject.scriptRan, undefined,
"Script node should not have run");
document.blockParsing(blockerPromise);
return true;
}).then(([document]) => {
return document;
});
document.body.appendChild(iframe);
// Wait for document-element-inserted to fire.
let doc = await promise;
let win = doc.defaultView.wrappedJSObject;
let root = doc.documentElement;
// At this point, if the parser was successfully blocked, we should still
// have the initial skeleton HTML for the page.
is(root.outerHTML, initialHTML, "Should have initial HTML after document-element-inserted returns");
is(win.scriptRan, undefined, "Script node should still not have run");
await blockerPromise;
// Just after the promise that's blocking the parser fires, we shouldn't have
// returned to the main event loop, so we should still have the initial HTML.
is(root.outerHTML, initialHTML, "Should still have initial HTML");
is(win.scriptRan, undefined, "Script node should still not have run");
await new Promise(resolve => win.addEventListener("DOMContentLoaded", resolve, {once: true}));
// Parsing should have resumed, and we should have finished loading the document.
is(root.outerHTML, finalHTML, "Should have final HTML");
is(win.scriptRan, true, "Script node should have run");
iframe.remove();
}
add_task(async function() {
'<html lang="en"></html>',
'<html lang="en"><head>\n <script>window.scriptRan = true;<\/script>\n <meta charset="utf-8">\n <title></title>\n</head>\n<body>\n <p>Hello Mochitest</p>\n\n\n</body></html>');
'<html xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"></html>',
'<html xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">\n<head>\n <script>window.scriptRan = true;<\/script>\n <title></title>\n</head>\n<body>\n <p>Hello Mochitest</p>\n</body>\n</html>');
'<html lang="en"></html>',
'<html lang="en"><head>\n <script src="file_script.js"><\/script>\n <meta charset="utf-8">\n <title></title>\n</head>\n<body>\n <p>Hello Mochitest</p>\n\n\n</body></html>');
'<html xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"></html>',
'<html xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">\n<head>\n <script src="file_script.js"><\/script>\n <title></title>\n</head>\n<body>\n <p>Hello Mochitest</p>\n</body>\n</html>');
});
add_task(async function test_cleanup() {
const TOPIC = "blocking-promise-destroyed";
const finalizationWitness = Cc["@mozilla.org/toolkit/finalizationwitness;1"]
.getService(Ci.nsIFinalizationWitnessService);
let iframe = document.createElement("iframe");
iframe.src = url;
// Create a promise that never resolves.
let blockerPromise = new Promise(() => {});
// Create a finalization witness so we can be sure that the promises
// have been collected before the end of the test.
let destroyedPromise = TestUtils.topicObserved(TOPIC);
let witness = finalizationWitness.make(TOPIC, url);
blockerPromise.witness = witness;
let insertedPromise = TestUtils.topicObserved("document-element-inserted", document => {
document.blockParsing(blockerPromise).witness = witness;
return true;
});
document.body.appendChild(iframe);
await insertedPromise;
// Clear the promise reference, destroy the document, and force GC/CC. This should
// trigger any potential leaks or cleanup issues.
blockerPromise = null;
witness = null;
iframe.remove();
Cu.forceGC();
Cu.forceCC();
Cu.forceGC();
// Make sure the blocker promise has been collected.
let [, data] = await destroyedPromise;
is(data, url, "Should have correct finalizer URL");
}
});
</script>
</body>
</html>