mozilla-central/toolkit/components/extensions/test/xpcshell/test_ext_runtime_onPerformanceWarning.js (file symbol)

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Test Info: Warnings

/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
"use strict";
const server = createHttpServer();
server.registerDirectory("/data/", do_get_file("data"));
const BASE_URL = `http://localhost:${server.identity.primaryPort}/data`;
function background() {
browser.runtime.onPerformanceWarning.addListener(details => {
browser.test.assertDeepEq(
{
category: "content_script",
severity: "high",
description:
"Slow extension content script caused a page hang, user was warned.",
},
details,
"Performance warning event contains expected details."
);
browser.test.notifyPass("performance-warning");
});
}
function otherBackground() {
browser.runtime.onPerformanceWarning.addListener(() => {
browser.test.fail(
"Unexpected onPerformanceWarning fired for other extension"
);
});
}
function contentScript() {
function hang(hangSeconds) {
const start = performance.now();
while (performance.now() - start < hangSeconds * 1000) {
/* no-op */
}
}
browser.test.onMessage.addListener(message => {
if (message === "trigger-hang") {
hang(3);
}
});
}
add_task(async function test_should_fire_on_content_script_hang() {
// Ensure hang reports are triggered after a one second hang, even without
// user input and for DEBUG builds.
Services.prefs.setIntPref("dom.max_ext_content_script_run_time", 1);
Services.prefs.setBoolPref(
"dom.max_script_run_time.require_critical_input",
false
);
Services.prefs.setBoolPref("dom.ipc.reportProcessHangs", true);
// First extension that triggers hang reports.
const extension = ExtensionTestUtils.loadExtension({
background,
files: {
"contentscript.js": contentScript,
},
manifest: {
content_scripts: [
{
js: ["contentscript.js"],
run_at: "document_start",
},
],
},
});
await extension.startup();
// Second extension that does not trigger hang reports.
const otherExtension = ExtensionTestUtils.loadExtension({
background: otherBackground,
});
await otherExtension.startup();
// Page for the first extension to run its content script.
const contentPage = await ExtensionTestUtils.loadContentPage(
`${BASE_URL}/dummy_page.html`
);
await contentPage.browserReady;
// Wait for the warning to fire and be caught.
await extension.sendMessage("trigger-hang");
await extension.awaitFinish("performance-warning");
// Tidy up.
await extension.unload();
await otherExtension.unload();
await contentPage.close();
Services.prefs.clearUserPref("dom.max_ext_content_script_run_time");
Services.prefs.clearUserPref(
"dom.max_script_run_time.require_critical_input"
);
Services.prefs.clearUserPref("dom.ipc.reportProcessHangs");
});