test_inspector-mutations-events.html

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https://bugzilla.mozilla.org/show_bug.cgi?id=1157469

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  <title>Test for Bug 1157469</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">

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"use strict";

window.onload = function() {

  SimpleTest.waitForExplicitFinish();

  const prevPrefValue = Services.prefs.getBoolPref("devtools.chrome.enabled");

  Services.prefs.setBoolPref("devtools.chrome.enabled", true);

  let inspectee = null;

  let inspector = null;

  let walker = null;

  const eventListener1 = function() {};

  const eventListener2 = function() {};

  let eventNode1;

  let eventNode2;

  let eventFront1;

  let eventFront2;

  addAsyncTest(async function setup() {

    info("Setting up inspector and walker actors.");

    const url = document.getElementById("inspectorContent").href;

    const { target, doc } = await attachURL(url);

    inspectee = doc;

    inspector = await target.getFront("inspector");

    walker = inspector.walker;

    runNextTest();

});

  addAsyncTest(async function setupEventTest() {

    eventNode1 = inspectee.querySelector("#a");

    eventNode2 = inspectee.querySelector("#b");

    eventFront1 = await walker.querySelector(walker.rootNode, "#a");

    eventFront2 = await walker.querySelector(walker.rootNode, "#b");

    runNextTest();

});

  addAsyncTest(async function testChangeEventListenerOnSingleNode() {

    checkNodesHaveNoEventListener();

    info("add event listener on a single node");

    eventNode1.addEventListener("click", eventListener1);

    let mutations = await waitForMutations();

    is(mutations.length, 1, "one mutation expected");

    is(mutations[0].target, eventFront1, "mutation targets eventFront1");

    is(mutations[0].type, "events", "mutation type is events");

    is(mutations[0].hasEventListeners, true,

       "mutation target should have event listeners");

    is(eventFront1.hasEventListeners, true, "eventFront1 should have event listeners");

    info("remove event listener on a single node");

    eventNode1.removeEventListener("click", eventListener1);

    mutations = await waitForMutations();

    is(mutations.length, 1, "one mutation expected");

    is(mutations[0].target, eventFront1, "mutation targets eventFront1");

    is(mutations[0].type, "events", "mutation type is events");

    is(mutations[0].hasEventListeners, false,

       "mutation target should have no event listeners");

    is(eventFront1.hasEventListeners, false,

       "eventFront1 should have no event listeners");

    info("perform several event listener changes on a single node");

    eventNode1.addEventListener("click", eventListener1);

    eventNode1.addEventListener("click", eventListener2);

    eventNode1.removeEventListener("click", eventListener1);

    eventNode1.removeEventListener("click", eventListener2);

    mutations = await waitForMutations();

    is(mutations.length, 1, "one mutation expected");

    is(mutations[0].target, eventFront1, "mutation targets eventFront1");

    is(mutations[0].type, "events", "mutation type is events");

    is(mutations[0].hasEventListeners, false,

       "no event listener expected on mutation target");

    is(eventFront1.hasEventListeners, false, "no event listener expected on node");

    runNextTest();

});

  addAsyncTest(async function testChangeEventsOnSeveralNodes() {

    checkNodesHaveNoEventListener();

    info("add event listeners on both nodes");

    eventNode1.addEventListener("click", eventListener1);

    eventNode2.addEventListener("click", eventListener2);

    let mutations = await waitForMutations();

    is(mutations.length, 2, "two mutations expected, one for each modified node");

    // first mutation

    is(mutations[0].target, eventFront1, "first mutation targets eventFront1");

    is(mutations[0].type, "events", "mutation type is events");

    is(mutations[0].hasEventListeners, true,

       "mutation target should have event listeners");

    is(eventFront1.hasEventListeners, true, "eventFront1 should have event listeners");

    // second mutation

    is(mutations[1].target, eventFront2, "second mutation targets eventFront2");

    is(mutations[1].type, "events", "mutation type is events");

    is(mutations[1].hasEventListeners, true,

       "mutation target should have event listeners");

    is(eventFront2.hasEventListeners, true, "eventFront1 should have event listeners");

    info("remove event listeners on both nodes");

    eventNode1.removeEventListener("click", eventListener1);

    eventNode2.removeEventListener("click", eventListener2);

    mutations = await waitForMutations();

    is(mutations.length, 2, "one mutation registered for event listener change");

    // first mutation

    is(mutations[0].target, eventFront1, "first mutation targets eventFront1");

    is(mutations[0].type, "events", "mutation type is events");

    is(mutations[0].hasEventListeners, false,

       "mutation target should have no event listeners");

    is(eventFront1.hasEventListeners, false,

       "eventFront2 should have no event listeners");

    // second mutation

    is(mutations[1].target, eventFront2, "second mutation targets eventFront2");

    is(mutations[1].type, "events", "mutation type is events");

    is(mutations[1].hasEventListeners, false,

       "mutation target should have no event listeners");

    is(eventFront2.hasEventListeners, false,

       "eventFront2 should have no event listeners");

    runNextTest();

});

  addAsyncTest(async function testRemoveMissingEvent() {

    checkNodesHaveNoEventListener();

    info("try to remove an event listener not previously added");

    eventNode1.removeEventListener("click", eventListener1);

    info("set any attribute on the node to trigger a mutation");

    eventNode1.setAttribute("data-attr", "somevalue");

    const mutations = await waitForMutations();

    is(mutations.length, 1, "expect only one mutation");

    isnot(mutations.type, "events", "mutation type should not be events");

    Services.prefs.setBoolPref("devtools.chrome.enabled", prevPrefValue);

    runNextTest();

});

  function checkNodesHaveNoEventListener() {

    is(eventFront1.hasEventListeners, false,

       "eventFront1 hasEventListeners should be false");

    is(eventFront2.hasEventListeners, false,

       "eventFront2 hasEventListeners should be false");

  function waitForMutations() {

    return new Promise(resolve => {

      walker.once("mutations", mutations => {

        resolve(mutations);

});

});

  runNextTest();

};

  </script>

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<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1157469">Mozilla Bug 1157469</a>

<a id="inspectorContent" target="_blank" href="inspector-traversal-data.html">Test Document</a>

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<div id="content" style="display: none">

</div>

<pre id="test">

</pre>

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