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https://bugzilla.mozilla.org/show_bug.cgi?id=
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<head>
  <meta charset="utf-8">
  <title>Test for Bug </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">
  <script type="application/javascript" src="inspector-helpers.js"></script>
  <script type="application/javascript">
"use strict";

const { PSEUDO_CLASSES } = require("devtools/shared/css/constants");

window.onload = function() {
  SimpleTest.waitForExplicitFinish();
  runNextTest();
};

let gInspectee = null;
let gWalker = null;

async function setup(callback) {
  const url = document.getElementById("inspectorContent").href;
  const { target, doc } = await attachURL(url);
  gInspectee = doc;
  const inspector = await target.getFront("inspector");
  ok(inspector.walker, "getWalker() should return an actor.");
  gWalker = inspector.walker;
  runNextTest();
}

function teardown() {
  gWalker = null;
  gInspectee = null;
}

function checkChange(change, expectation) {
  is(change.type, "pseudoClassLock", "Expect a pseudoclass lock change.");
  const target = change.target;
  if (expectation.id) {
    is(target.id, expectation.id, "Expect a change on node id " + expectation.id);
  }
  if (expectation.nodeName) {
    is(target.nodeName, expectation.nodeName,
       "Expect a change on node name " + expectation.nodeName);
  }

  is(target.pseudoClassLocks.length, expectation.pseudos.length,
     "Expect " + expectation.pseudos.length + " pseudoclass locks.");
  for (let i = 0; i < expectation.pseudos.length; i++) {
    const pseudo = expectation.pseudos[i];
    const enabled = expectation.enabled === undefined ? true : expectation.enabled[i];
    ok(target.hasPseudoClassLock(pseudo), "Expect lock: " + pseudo);
    const rawNode = target.rawNode();
    ok(InspectorUtils.hasPseudoClassLock(rawNode, pseudo),
       "Expect lock in dom: " + pseudo);

    is(rawNode.matches(pseudo), enabled,
       `Target should match pseudoclass, '${pseudo}', if enabled (with .matches())`);
  }

  for (const pseudo of PSEUDO_CLASSES) {
    if (!expectation.pseudos.some(expected => pseudo === expected)) {
      ok(!target.hasPseudoClassLock(pseudo), "Don't expect lock: " + pseudo);
      ok(!InspectorUtils.hasPseudoClassLock(target.rawNode(), pseudo),
         "Don't expect lock in dom: " + pseudo);
    }
  }
}

function checkMutations(mutations, expectations) {
  is(mutations.length, expectations.length, "Should get the right number of mutations.");
  for (let i = 0; i < mutations.length; i++) {
    checkChange(mutations[i], expectations[i]);
  }
}

addTest(function testPseudoClassLock() {
  let contentNode;
  let nodeFront;
  setup(() => {
    contentNode = gInspectee.querySelector("#b");
    return promiseDone(gWalker.querySelector(gWalker.rootNode, "#b").then(front => {
      nodeFront = front;
      // Lock the pseudoclass alone, no parents.
      gWalker.addPseudoClassLock(nodeFront, ":active");
      // Expect a single pseudoClassLock mutation.
      return promiseOnce(gWalker, "mutations");
    }).then(mutations => {
      is(mutations.length, 1, "Should get one mutation");
      is(mutations[0].target, nodeFront, "Should be the node we tried to apply to");
      checkChange(mutations[0], {
        id: "b",
        nodeName: "DIV",
        pseudos: [":active"],
      });
    }).then(() => {
      // Now add :hover, this time with parents.
      gWalker.addPseudoClassLock(nodeFront, ":hover", {parents: true});
      return promiseOnce(gWalker, "mutations");
    }).then(mutations => {
      const expectedMutations = [{
        id: "b",
        nodeName: "DIV",
        pseudos: [":hover", ":active"],
      },
      {
        id: "longlist",
        nodeName: "DIV",
        pseudos: [":hover"],
      },
      {
        nodeName: "BODY",
        pseudos: [":hover"],
      },
      {
        nodeName: "HTML",
        pseudos: [":hover"],
      }];
      checkMutations(mutations, expectedMutations);
    }).then(() => {
      // Now remove the :hover on all parents
      gWalker.removePseudoClassLock(nodeFront, ":hover", {parents: true});
      return promiseOnce(gWalker, "mutations");
    }).then(mutations => {
      const expectedMutations = [{
        id: "b",
        nodeName: "DIV",
        // Should still have :active on the original node.
        pseudos: [":active"],
      },
      {
        id: "longlist",
        nodeName: "DIV",
        pseudos: [],
      },
      {
        nodeName: "BODY",
        pseudos: [],
      },
      {
        nodeName: "HTML",
        pseudos: [],
      }];
      checkMutations(mutations, expectedMutations);
    }).then(() => {
      gWalker.addPseudoClassLock(nodeFront, ":hover", {enabled: false});
      return promiseOnce(gWalker, "mutations");
    }).then(mutations => {
      is(mutations.length, 1, "Should get one mutation");
      is(mutations[0].target, nodeFront, "Should be the node we tried to apply to");
      checkChange(mutations[0], {
        id: "b",
        nodeName: "DIV",
        pseudos: [":hover", ":active"],
        enabled: [false, true],
      });
    }).then(() => {
      // Now shut down the walker and make sure that clears up the remaining lock.
      return gWalker.release();
    }).then(() => {
      ok(!InspectorUtils.hasPseudoClassLock(contentNode, ":active"),
         "Pseudoclass should have been removed during destruction.");
      teardown();
    }).then(runNextTest));
  });
});

  </script>
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
<a id="inspectorContent" target="_blank" href="inspector-traversal-data.html">Test Document</a>
<p id="display"></p>
<div id="content" style="display: none">

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<pre id="test">
</pre>
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