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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
"use strict";
const {
openToolbox,
closeToolbox,
runTest,
testSetup,
testTeardown,
SIMPLE_URL,
} = require("damp-test/tests/head");
/**
* Measure the time necessary to perform successive childList mutations in the content
* page and update the markup-view accordingly.
*/
module.exports = async function () {
let tab = await testSetup(SIMPLE_URL);
let messageManager = tab.linkedBrowser.messageManager;
let toolbox = await openToolbox("inspector");
let inspector = toolbox.getPanel("inspector");
// Test with n=LIMIT mutations, with t=DELAY ms between each one.
const LIMIT = 100;
const DELAY = 5;
messageManager.loadFrameScript(
"data:,(" +
encodeURIComponent(
`function () {
const LIMIT = ${LIMIT};
addMessageListener("start-mutations-test", function () {
let addElement = function(index) {
if (index == LIMIT) {
// LIMIT was reached, stop adding elements.
return;
}
let div = content.document.createElement("div");
content.document.body.appendChild(div);
content.setTimeout(() => addElement(index + 1), ${DELAY});
};
addElement(0);
});
}`
) +
")()",
false
);
let test = runTest("inspector.mutations");
await new Promise(resolve => {
let childListMutationsCounter = 0;
inspector.on("markupmutation", mutations => {
let childListMutations = mutations.filter(m => m.type === "childList");
childListMutationsCounter += childListMutations.length;
if (childListMutationsCounter === LIMIT) {
// Wait until we received exactly n=LIMIT mutations in the markup view.
resolve();
}
});
messageManager.sendAsyncMessage("start-mutations-test");
});
test.done();
await closeToolbox();
await testTeardown();
};