mozilla-central/browser/base/content/test/static/browser_parsable_script.js (file symbol)

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Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
/* This list allows pre-existing or 'unfixable' JS issues to remain, while we
* detect newly occurring issues in shipping JS. It is a list of regexes
* matching files which have errors:
*/
requestLongerTimeout(2);
const kAllowlist = new Set([
/browser\/content\/browser\/places\/controller.js$/,
]);
// Normally we would use reflect.sys.mjs to get Reflect.parse. However, if
// we do that, then all the AST data is allocated in reflect.sys.mjs's
// zone. That exposes a bug in our GC. The GC collects reflect.sys.mjs's
// zone but not the zone in which our test code lives (since no new
// data is being allocated in it). The cross-compartment wrappers in
// our zone that point to the AST data never get collected, and so the
// AST data itself is never collected. We need to GC both zones at
// once to fix the problem.
const init = Cc["@mozilla.org/jsreflect;1"].createInstance();
init();
/**
* Check if an error should be ignored due to matching one of the allowlist
* objects.
*
* @param uri the uri to check against the allowlist
* @return true if the uri should be skipped, false otherwise.
*/
function uriIsAllowed(uri) {
for (let allowlistItem of kAllowlist) {
if (allowlistItem.test(uri.spec)) {
return true;
}
}
return false;
}
function parsePromise(uri, parseTarget) {
let promise = new Promise(resolve => {
let xhr = new XMLHttpRequest();
xhr.open("GET", uri, true);
xhr.onreadystatechange = function () {
if (this.readyState == this.DONE) {
let scriptText = this.responseText;
try {
info(`Checking ${parseTarget} ${uri}`);
let parseOpts = {
source: uri,
target: parseTarget,
};
Reflect.parse(scriptText, parseOpts);
resolve(true);
} catch (ex) {
let errorMsg = "Script error reading " + uri + ": " + ex;
ok(false, errorMsg);
resolve(false);
}
}
};
xhr.onerror = error => {
ok(false, "XHR error reading " + uri + ": " + error);
resolve(false);
};
xhr.overrideMimeType("application/javascript");
xhr.send(null);
});
return promise;
}
add_task(async function checkAllTheJS() {
// In debug builds, even on a fast machine, collecting the file list may take
// more than 30 seconds, and parsing all files may take four more minutes.
// For this reason, this test must be explictly requested in debug builds by
// using the "--setpref parse=<filter>" argument to mach. You can specify:
// - A case-sensitive substring of the file name to test (slow).
// - A single absolute URI printed out by a previous run (fast).
// - An empty string to run the test on all files (slowest).
let parseRequested = Services.prefs.prefHasUserValue("parse");
let parseValue = parseRequested && Services.prefs.getCharPref("parse");
if (SpecialPowers.isDebugBuild) {
if (!parseRequested) {
ok(
true,
"Test disabled on debug build. To run, execute: ./mach" +
" mochitest-browser --setpref parse=<case_sensitive_filter>" +
" browser/base/content/test/general/browser_parsable_script.js"
);
return;
}
// Request a 15 minutes timeout (30 seconds * 30) for debug builds.
requestLongerTimeout(30);
}
let uris;
// If an absolute URI is specified on the command line, use it immediately.
if (parseValue && parseValue.includes(":")) {
uris = [NetUtil.newURI(parseValue)];
} else {
let appDir = Services.dirsvc.get("GreD", Ci.nsIFile);
// This asynchronously produces a list of URLs (sadly, mostly sync on our
// test infrastructure because it runs against jarfiles there, and
// our zipreader APIs are all sync)
let startTimeMs = Date.now();
info("Collecting URIs");
uris = await generateURIsFromDirTree(appDir, [".js", ".jsm", ".mjs"]);
info("Collected URIs in " + (Date.now() - startTimeMs) + "ms");
// Apply the filter specified on the command line, if any.
if (parseValue) {
uris = uris.filter(uri => {
if (uri.spec.includes(parseValue)) {
return true;
}
info("Not checking filtered out " + uri.spec);
return false;
});
}
}
// We create an array of promises so we can parallelize all our parsing
// and file loading activity:
await PerfTestHelpers.throttledMapPromises(uris, uri => {
if (uriIsAllowed(uri)) {
info("Not checking allowlisted " + uri.spec);
return undefined;
}
let target = "script";
if (uriIsESModule(uri)) {
target = "module";
}
return parsePromise(uri.spec, target);
});
ok(true, "All files parsed");
});