The Tor Browser: content/base/test/test_mutationobservers.html@6474c204b198 (annotated)

content/base/test/test_mutationobservers.html@6474c204b198 (annotated)

content/base/test/test_mutationobservers.html

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 <!DOCTYPE HTML>
 <html>
 <!--
 https://bugzilla.mozilla.org/show_bug.cgi?id=641821
 -->
 <head>
   <meta charset="utf-8">
   <title>Test for Bug 641821</title>
   <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
 </head>
 <body onload="runTest()">
 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=641821">Mozilla Bug 641821</a>
 <p id="display"></p>
 <div id="content" style="display: none">
 </div>
 <pre id="test">
 <script type="application/javascript">
 /** Test for Bug 641821 **/
 var div = document.createElement("div");
 var M;
 if ("MozMutationObserver" in window) {
   M = window.MozMutationObserver;
 } else if ("WebKitMutationObserver" in window) {
   M = window.WebKitMutationObserver;
 } else {
   M = window.MutationObserver;
 }
 function log(str) {
   var d = document.createElement("div");
   d.textContent = str;
   if (str.indexOf("PASSED") >= 0) {
     d.setAttribute("style", "color: green;");
   } else {
     d.setAttribute("style", "color: red;");
   }
   document.getElementById("log").appendChild(d);
 }
 // Some helper functions so that this test runs also outside mochitest.
 if (!("ok" in window)) {
   window.ok = function(val, str) {
     log(str + (val ? " PASSED\n" : " FAILED\n"));
   }
 }
 if (!("is" in window)) {
   window.is = function(val, refVal, str) {
     log(str + (val == refVal? " PASSED " : " FAILED ") +
         (val != refVal ? "expected " + refVal + " got " + val + "\n" : "\n"));
   }
 }
 if (!("isnot" in window)) {
   window.isnot = function(val, refVal, str) {
     log(str + (val != refVal? " PASSED " : " FAILED ") +
         (val == refVal ? "Didn't expect " + refVal + "\n" : "\n"));
   }
 }
 if (!("SimpleTest" in window)) {
   window.SimpleTest =
   {
     finish: function() {
       document.getElementById("log").appendChild(document.createTextNode("DONE"));
     },
     waitForExplicitFinish: function() {}
   }
 }
 function then(thenFn) {
   setTimeout(function() {
     if (thenFn) {
       setTimeout(thenFn, 0);
     } else {
       SimpleTest.finish();
     }
   }, 0);
 }
 var m;
 var m2;
 var m3;
 var m4;
 // Checks basic parameter validation and normal 'this' handling.
 // Tests also basic attribute handling.
 function runTest() {
   m = new M(function(){});
   ok(m, "MutationObserver supported");
   var e = null;
   try {
     m.observe(document, {});
   } catch (ex) {
     e = ex;
   }
   ok(e, "Should have thrown an exception");
   is(e.name, "SyntaxError", "Should have thrown SyntaxError");
   is(e.code, DOMException.SYNTAX_ERR, "Should have thrown DOMException.SYNTAX_ERR");
   e = null;
   try {
     m.observe(document, { childList: true, attributeOldValue: true });
   } catch (ex) {
     e = ex;
   }
   ok(e, "Should have thrown an exception");
   is(e.name, "SyntaxError", "Should have thrown SyntaxError");
   is(e.code, DOMException.SYNTAX_ERR, "Should have thrown DOMException.SYNTAX_ERR");
   e = null;
   try {
     m.observe(document, { childList: true, attributeFilter: ["foo"] });
   } catch (ex) {
     e = ex;
   }
   ok(e, "Should have thrown an exception");
   is(e.name, "SyntaxError", "Should have thrown SyntaxError");
   is(e.code, DOMException.SYNTAX_ERR, "Should have thrown DOMException.SYNTAX_ERR");
   e = null;
   try {
     m.observe(document, { childList: true, characterDataOldValue: true });
   } catch (ex) {
     e = ex;
   }
   ok(e, "Should have thrown an exception");
   is(e.name, "SyntaxError", "Should have thrown SyntaxError");
   is(e.code, DOMException.SYNTAX_ERR, "Should have thrown DOMException.SYNTAX_ERR");
   e = null;
   try {
     m.observe(document);
   } catch (ex) {
     e = ex;
   }
   ok(e, "Should have thrown an exception");
   m = new M(function(records, observer) {
       is(observer, m, "2nd parameter should be the mutation observer");
       is(observer, this, "2nd parameter should be 'this'");
       is(records.length, 1, "Should have one record.");
       is(records[0].type, "attributes", "Should have got attributes record");
       is(records[0].target, div, "Should have got div as target");
       is(records[0].attributeName, "foo", "Should have got record about foo attribute");
       observer.disconnect();
       then(testThisBind);
       m = null;
     });
   m.observe(div, { attributes: true, attributeFilter: ["foo"] });
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].attributes, true);
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].attributeFilter.length, 1)
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].attributeFilter[0], "foo")
   div.setAttribute("foo", "bar");
 }
 // 'this' handling when fn.bind() is used.
 function testThisBind() {
   var child = div.appendChild(document.createElement("div"));
   var gchild = child.appendChild(document.createElement("div"));
   m = new M((function(records, observer) {
       is(observer, m, "2nd parameter should be the mutation observer");
       isnot(observer, this, "2nd parameter should be 'this'");
       is(records.length, 3, "Should have one record.");
       is(records[0].type, "attributes", "Should have got attributes record");
       is(records[0].target, div, "Should have got div as target");
       is(records[0].attributeName, "foo", "Should have got record about foo attribute");
       is(records[0].oldValue, "bar", "oldValue should be bar");
       is(records[1].type, "attributes", "Should have got attributes record");
       is(records[1].target, div, "Should have got div as target");
       is(records[1].attributeName, "foo", "Should have got record about foo attribute");
       is(records[1].oldValue, "bar2", "oldValue should be bar2");
       is(records[2].type, "attributes", "Should have got attributes record");
       is(records[2].target, gchild, "Should have got div as target");
       is(records[2].attributeName, "foo", "Should have got record about foo attribute");
       is(records[2].oldValue, null, "oldValue should be bar2");
       observer.disconnect();
       then(testCharacterData);
       m = null;
     }).bind(window));
   m.observe(div, { attributes: true, attributeOldValue: true, subtree: true });
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].attributes, true)
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].attributeOldValue, true)
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[0].getObservingInfo()[0].subtree, true)
   div.setAttribute("foo", "bar2");
   div.removeAttribute("foo");
   div.removeChild(child);
   child.removeChild(gchild);
   div.appendChild(gchild);
   div.removeChild(gchild);
   gchild.setAttribute("foo", "bar");
 }
 function testCharacterData() {
   m = new M(function(records, observer) {
       is(records[0].type, "characterData", "Should have got characterData");
       is(records[0].oldValue, null, "Shouldn't have got oldData");
       observer.disconnect();
       m = null;
     });
   m2 = new M(function(records, observer) {
       is(records[0].type, "characterData", "Should have got characterData");
       is(records[0].oldValue, "foo", "Should have got oldData");
       observer.disconnect();
       m2 = null;
     });
   m3 = new M(function(records, observer) {
       ok(false, "This should not be called!");
       observer.disconnect();
       m3 = null;
     });
   m4 = new M(function(records, observer) {
       is(records[0].oldValue, null, "Shouldn't have got oldData");
       observer.disconnect();
       m3.disconnect();
       m3 = null;
       then(testChildList);
       m4 = null;
     });
   div.appendChild(document.createTextNode("foo"));
   m.observe(div, { characterData: true, subtree: true });
   m2.observe(div, { characterData: true, characterDataOldValue: true, subtree: true});
   // If observing the same node twice, only the latter option should apply.
   m3.observe(div, { characterData: true, subtree: true });
   m3.observe(div, { characterData: true, subtree: false });
   m4.observe(div.firstChild, { characterData: true, subtree: false });
   is(SpecialPowers.wrap(div).getBoundMutationObservers().length, 3)
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[2].getObservingInfo()[0].characterData, true)
   is(SpecialPowers.wrap(div).getBoundMutationObservers()[2].getObservingInfo()[0].subtree, false)
   div.firstChild.data = "bar";
 }
 function testChildList() {
   var fc = div.firstChild;
   m = new M(function(records, observer) {
       is(records[0].type, "childList", "Should have got childList");
       is(records[0].addedNodes.length, 0, "Shouldn't have got addedNodes");
       is(records[0].removedNodes.length, 1, "Should have got removedNodes");
       is(records[0].removedNodes[0], fc, "Should have removed a text node");
       observer.disconnect();
       then(testChildList2);
       m = null;
     });
   m.observe(div, { childList: true});
   div.removeChild(div.firstChild);
 }
 function testChildList2() {
   div.innerHTML = "<span>1</span><span>2</span>";
   m = new M(function(records, observer) {
       is(records[0].type, "childList", "Should have got childList");
       is(records[0].removedNodes.length, 2, "Should have got removedNodes");
       is(records[0].addedNodes.length, 1, "Should have got addedNodes");
       observer.disconnect();
       then(testChildList3);
       m = null;
     });
   m.observe(div, { childList: true });
   div.innerHTML = "<span><span>foo</span></span>";
 }
 function testChildList3() {
   m = new M(function(records, observer) {
       is(records[0].type, "childList", "Should have got childList");
       is(records[0].removedNodes.length, 1, "Should have got removedNodes");
       is(records[0].addedNodes.length, 1, "Should have got addedNodes");
       observer.disconnect();
       then(testChildList4);
       m = null;
     });
   m.observe(div, { childList: true });
   div.textContent = "hello";
 }
 function testChildList4() {
   div.textContent = null;
   var df = document.createDocumentFragment();
   var t1 = df.appendChild(document.createTextNode("Hello "));
   var t2 = df.appendChild(document.createTextNode("world!"));
   var s1 = div.appendChild(document.createElement("span"));
   s1.textContent = "foo";
   var s2 = div.appendChild(document.createElement("span"));
   function callback(records, observer) {
       is(records.length, 3, "Should have got one record for removing nodes from document fragment and one record for adding them to div");
       is(records[0].removedNodes.length, 2, "Should have got removedNodes");
       is(records[0].removedNodes[0], t1, "Should be the 1st textnode");
       is(records[0].removedNodes[1], t2, "Should be the 2nd textnode");
       is(records[1].addedNodes.length, 2, "Should have got addedNodes");
       is(records[1].addedNodes[0], t1, "Should be the 1st textnode");
       is(records[1].addedNodes[1], t2, "Should be the 2nd textnode");
       is(records[1].previousSibling, s1, "Should have previousSibling");
       is(records[1].nextSibling, s2, "Should have nextSibling");
       is(records[2].type, "characterData", "3rd record should be characterData");
       is(records[2].target, t1, "target should be the textnode");
       is(records[2].oldValue, "Hello ", "oldValue was 'Hello '");
       observer.disconnect();
       then(testChildList5);
       m = null;
     };
   m = new M(callback);
   m.observe(df, { childList: true, characterData: true, characterDataOldValue: true, subtree: true });
   is(SpecialPowers.wrap(df).getBoundMutationObservers()[0].getObservingInfo()[0].childList, true)
   is(SpecialPowers.wrap(df).getBoundMutationObservers()[0].getObservingInfo()[0].characterData, true)
   is(SpecialPowers.wrap(df).getBoundMutationObservers()[0].getObservingInfo()[0].characterDataOldValue, true)
   is(SpecialPowers.wrap(df).getBoundMutationObservers()[0].getObservingInfo()[0].subtree, true)
   ok(SpecialPowers.compare(SpecialPowers.wrap(df).getBoundMutationObservers()[0].mutationCallback, callback))
   m.observe(div, { childList: true });
   is(SpecialPowers.wrap(df).getBoundMutationObservers()[0].getObservingInfo().length, 2)
   // Make sure transient observers aren't leaked.
   var leakTest = new M(function(){});
   leakTest.observe(div, { characterData: true, subtree: true });
   div.insertBefore(df, s2);
   s1.firstChild.data = "bar"; // This should *not* create a record.
   t1.data = "Hello the whole "; // This should create a record.
 }
 function testChildList5() {
   div.textContent = null;
   var c1 = div.appendChild(document.createElement("div"));
   var c2 = document.createElement("div");
   var div2 = document.createElement("div");
   var c3 = div2.appendChild(document.createElement("div"));
   var c4 = document.createElement("div");
   var c5 = document.createElement("div");
   var df = document.createDocumentFragment();
   var emptyDF = document.createDocumentFragment();
   var dfc1 = df.appendChild(document.createElement("div"));
   var dfc2 = df.appendChild(document.createElement("div"));
   var dfc3 = df.appendChild(document.createElement("div"));
   m = new M(function(records, observer) {
       is(records.length, 6 , "");
       is(records[0].removedNodes.length, 1, "Should have got removedNodes");
       is(records[0].removedNodes[0], c1, "");
       is(records[0].addedNodes.length, 1, "Should have got addedNodes");
       is(records[0].addedNodes[0], c2, "");
       is(records[0].previousSibling, null, "");
       is(records[0].nextSibling, null, "");
       is(records[1].removedNodes.length, 1, "Should have got removedNodes");
       is(records[1].removedNodes[0], c3, "");
       is(records[1].addedNodes.length, 0, "Shouldn't have got addedNodes");
       is(records[1].previousSibling, null, "");
       is(records[1].nextSibling, null, "");
       is(records[2].removedNodes.length, 1, "Should have got removedNodes");
       is(records[2].removedNodes[0], c2, "");
       is(records[2].addedNodes.length, 1, "Should have got addedNodes");
       is(records[2].addedNodes[0], c3, "");
       is(records[2].previousSibling, null, "");
       is(records[2].nextSibling, null, "");
       // Check document fragment handling
       is(records[5].removedNodes.length, 1, "");
       is(records[5].removedNodes[0], c4, "");
       is(records[5].addedNodes.length, 3, "");
       is(records[5].addedNodes[0], dfc1, "");
       is(records[5].addedNodes[1], dfc2, "");
       is(records[5].addedNodes[2], dfc3, "");
       is(records[5].previousSibling, c3, "");
       is(records[5].nextSibling, c5, "");
       observer.disconnect();
       then(testAdoptNode);
       m = null;
     });
   m.observe(div, { childList: true, subtree: true });
   m.observe(div2, { childList: true, subtree: true });
   div.replaceChild(c2, c1);
   div.replaceChild(c3, c2);
   div.appendChild(c4);
   div.appendChild(c5);
   div.replaceChild(df, c4);
   div.appendChild(emptyDF); // empty document shouldn't cause mutation records
 }
 function testAdoptNode() {
   var d1 = document.implementation.createHTMLDocument(null);
   var d2 = document.implementation.createHTMLDocument(null);
   var addedNode;
   m = new M(function(records, observer) {
       is(records.length, 3, "Should have 2 records");
       is(records[0].target.ownerDocument, d1, "ownerDocument should be the initial document")
       is(records[1].target.ownerDocument, d2, "ownerDocument should be the new document");
       is(records[2].type, "attributes", "Should have got attribute mutation")
       is(records[2].attributeName, "foo", "Should have got foo attribute mutation")
       observer.disconnect();
       then(testOuterHTML);
       m = null;
     });
   m.observe(d1, { childList: true, subtree: true, attributes: true });
   d2.body.appendChild(d1.body);
   addedNode = d2.body.lastChild.appendChild(d2.createElement("div"));
   addedNode.setAttribute("foo", "bar");
 }
 function testOuterHTML() {
   var doc = document.implementation.createHTMLDocument(null);
   var d1 = doc.body.appendChild(document.createElement("div"));
   var d2 = doc.body.appendChild(document.createElement("div"));
   var d3 = doc.body.appendChild(document.createElement("div"));
   var d4 = doc.body.appendChild(document.createElement("div"));
   m = new M(function(records, observer) {
       is(records.length, 4, "Should have 1 record");
       is(records[0].removedNodes.length, 1, "Should have 1 removed nodes");
       is(records[0].addedNodes.length, 2, "Should have 2 added nodes");
       is(records[0].previousSibling, null, "");
       is(records[0].nextSibling, d2, "");
       is(records[1].removedNodes.length, 1, "Should have 1 removed nodes");
       is(records[1].addedNodes.length, 2, "Should have 2 added nodes");
       is(records[1].previousSibling, records[0].addedNodes[1], "");
       is(records[1].nextSibling, d3, "");
       is(records[2].removedNodes.length, 1, "Should have 1 removed nodes");
       is(records[2].addedNodes.length, 2, "Should have 2 added nodes");
       is(records[2].previousSibling, records[1].addedNodes[1], "");
       is(records[2].nextSibling, d4, "");
       is(records[3].removedNodes.length, 1, "Should have 1 removed nodes");
       is(records[3].addedNodes.length, 0);
       is(records[3].previousSibling, records[2].addedNodes[1], "");
       is(records[3].nextSibling, null, "");
       observer.disconnect();
       then(testInsertAdjacentHTML);
       m = null;
     });
   m.observe(doc, { childList: true, subtree: true });
   d1.outerHTML = "<div>1</div><div>1</div>";
   d2.outerHTML = "<div>2</div><div>2</div>";
   d3.outerHTML = "<div>3</div><div>3</div>";
   d4.outerHTML = "";
 }
 function testInsertAdjacentHTML() {
   var doc = document.implementation.createHTMLDocument(null);
   var d1 = doc.body.appendChild(document.createElement("div"));
   var d2 = doc.body.appendChild(document.createElement("div"));
   var d3 = doc.body.appendChild(document.createElement("div"));
   var d4 = doc.body.appendChild(document.createElement("div"));
   m = new M(function(records, observer) {
       is(records.length, 4, "");
       is(records[0].target, doc.body, "");
       is(records[0].previousSibling, null, "");
       is(records[0].nextSibling, d1, "");
       is(records[1].target, d2, "");
       is(records[1].previousSibling, null, "");
       is(records[1].nextSibling, null, "");
       is(records[2].target, d3, "");
       is(records[2].previousSibling, null, "");
       is(records[2].nextSibling, null, "");
       is(records[3].target, doc.body, "");
       is(records[3].previousSibling, d4, "");
       is(records[3].nextSibling, null, "");
       observer.disconnect();
       then(testSyncXHR);
       m = null;
     });
   m.observe(doc, { childList: true, subtree: true });
   d1.insertAdjacentHTML("beforebegin", "<div></div><div></div>");
   d2.insertAdjacentHTML("afterbegin", "<div></div><div></div>");
   d3.insertAdjacentHTML("beforeend", "<div></div><div></div>");
   d4.insertAdjacentHTML("afterend", "<div></div><div></div>");
 }
 var callbackHandled = false;
 function testSyncXHR() {
   div.textContent = null;
   m = new M(function(records, observer) {
       is(records.length, 1, "");
       is(records[0].addedNodes.length, 1, "");
       callbackHandled = true;
       observer.disconnect();
       m = null;
     });
   m.observe(div, { childList: true, subtree: true });
   div.innerHTML = "<div>hello</div>";
   var x = new XMLHttpRequest();
   x.open("GET", window.location, false);
   x.send();
   ok(!callbackHandled, "Shouldn't have called the mutation callback!");
   setTimeout(testSyncXHR2, 0);
 }
 function testSyncXHR2() {
   ok(callbackHandled, "Should have called the mutation callback!");
   then(testModalDialog);
 }
 function testModalDialog() {
   var didHandleCallback = false;
   div.innerHTML = "<span>1</span><span>2</span>";
   m = new M(function(records, observer) {
       is(records[0].type, "childList", "Should have got childList");
       is(records[0].removedNodes.length, 2, "Should have got removedNodes");
       is(records[0].addedNodes.length, 1, "Should have got addedNodes");
       observer.disconnect();
       m = null;
       didHandleCallback = true;
     });
   m.observe(div, { childList: true });
   div.innerHTML = "<span><span>foo</span></span>";
   try {
     window.showModalDialog("mutationobserver_dialog.html");
     ok(didHandleCallback, "Should have called the callback while showing modal dialog!");
   } catch(e) {
     todo(false, "showModalDialog not implemented on this platform");
   }
   then(testTakeRecords);
 }
 function testTakeRecords() {
   var s = "<span>1</span><span>2</span>";
   div.innerHTML = s;
   var takenRecords;
   m = new M(function(records, observer) {
       is(records.length, 3, "Should have got 3 records");
       is(records[0].type, "attributes", "Should have got attributes");
       is(records[0].attributeName, "foo", "");
       is(records[0].attributeNamespace, null, "");
       is(records[0].prevValue, null, "");
       is(records[1].type, "childList", "Should have got childList");
       is(records[1].removedNodes.length, 2, "Should have got removedNodes");
       is(records[1].addedNodes.length, 2, "Should have got addedNodes");
       is(records[2].type, "attributes", "Should have got attributes");
       is(records[2].attributeName, "foo", "");
       is(records.length, takenRecords.length, "Should have had similar mutations");
       is(records[0].type, takenRecords[0].type, "Should have had similar mutations");
       is(records[1].type, takenRecords[1].type, "Should have had similar mutations");
       is(records[2].type, takenRecords[2].type, "Should have had similar mutations");
       is(records[1].removedNodes.length, takenRecords[1].removedNodes.length, "Should have had similar mutations");
       is(records[1].addedNodes.length, takenRecords[1].addedNodes.length, "Should have had similar mutations");
       is(m.takeRecords().length, 0, "Shouldn't have any records");
       observer.disconnect();
       then(testMutationObserverAndEvents);
       m = null;
     });
   m.observe(div, { childList: true, attributes: true });
   div.setAttribute("foo", "bar");
   div.innerHTML = s;
   div.removeAttribute("foo");
   takenRecords = m.takeRecords();
   div.setAttribute("foo", "bar");
   div.innerHTML = s;
   div.removeAttribute("foo");
 }
 function testTakeRecords() {
   function mutationListener(e) {
     ++mutationEventCount;
     is(e.attrChange, MutationEvent.ADDITION, "unexpected change");
   }
   m = new M(function(records, observer) {
       is(records.length, 2, "Should have got 2 records");
       is(records[0].type, "attributes", "Should have got attributes");
       is(records[0].attributeName, "foo", "");
       is(records[0].oldValue, null, "");
       is(records[1].type, "attributes", "Should have got attributes");
       is(records[1].attributeName, "foo", "");
       is(records[1].oldValue, "bar", "");
       observer.disconnect();
       div.removeEventListener("DOMAttrModified", mutationListener);
       then(testExpandos);
       m = null;
     });
   m.observe(div, { attributes: true, attributeOldValue: true });
   // Note, [0] points to a mutation observer which is there for a leak test!
   ok(SpecialPowers.compare(SpecialPowers.wrap(div).getBoundMutationObservers()[1], m));
   var mutationEventCount = 0;
   div.addEventListener("DOMAttrModified", mutationListener);
   div.setAttribute("foo", "bar");
   div.setAttribute("foo", "bar");
   is(mutationEventCount, 1, "Should have got only one mutation event!");
 }
 function testExpandos() {
   var m2 = new M(function(records, observer) {
     is(observer.expandoProperty, true);
     observer.disconnect();
     then();
   });
   m2.expandoProperty = true;
   m2.observe(div, { attributes: true });
   m2 = null;
   if (SpecialPowers) {
     // Run GC several times to see if the expando property disappears.
     SpecialPowers.gc();
     SpecialPowers.gc();
     SpecialPowers.gc();
     SpecialPowers.gc();
   }
   div.setAttribute("foo", "bar2");
 }
 SimpleTest.waitForExplicitFinish();
 </script>
 </pre>
 <div id="log">
 </div>
 </body>
 </html>

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