third_party/WebKit/LayoutTests/fast/dom/Node/fragment-mutation.html

   1 <html>
   2 <head>
   3 <title>Fragment Mutation Tests</title>
   4 <script>
   5
   6 if (window.testRunner)
   7     testRunner.dumpAsText();
   8
   9 var log = [];
  10
  11 function logResult(description, outcome)
  12 {
  13     log.push({ description: description, outcome: outcome});
  14 }
  15
  16 function printLog(methodName)
  17 {
  18     var entries = log.map(function(entry) {
  19         return "<li>" + entry.description + ": " + entry.outcome;
  20     });
  21     document.body.appendChild(document.createElement("p")).innerHTML = "This test creates a fragment containing three elements: \"B\", \"U\", and \"P\", " +
  22         "  attempts to " + methodName + " this fragment and studies effects of mutation events on the fragment.";
  23     document.body.appendChild(document.createElement("ul")).innerHTML = entries.join("\n");
  24     document.body.appendChild(document.createElement("br"));
  25     log = [];
  26 }
  27
  28 function produceNodeNameString(nodes)
  29 {
  30     var node = nodes.firstChild;
  31     var result = "";
  32     while(node) {
  33         result += node.nodeName;
  34         node = node.nextSibling;
  35     }
  36     return result;
  37 }
  38
  39 function expectException(error)
  40 {
  41     return function(stash, exception) {
  42         if (!exception)
  43             return "FAIL, expected exception with code " + code + ". The resulting fragment was: \"" + produceNodeNameString(stash) + "\".";
  44
  45         if (exception instanceof error)
  46             return "PASS";
  47         return "FAIL, expected exception code: " + code + ", was: " + exception + ".";
  48     }
  49 }
  50
  51 function expectNodes(nodes)
  52 {
  53     return function(stash, exception) {
  54         if (exception)
  55             return "FAIL, unexpected exception thrown: " + exception;
  56         var result = produceNodeNameString(stash);
  57         if (nodes == result)
  58             return "PASS";
  59         return "FAIL, expected \"" + nodes + "\", was \"" + result + "\".";
  60     };
  61 }
  62
  63 function testFragment(method, description, mutationHandler, expectation, nonStop)
  64 {
  65     var once = 0;
  66     var logged = 0;
  67     var frag = document.createDocumentFragment();
  68     var stash = document.body.appendChild(document.createElement("div"));
  69         frag.appendChild(document.createElement("b"));
  70         frag.appendChild(document.createElement("u"));
  71         frag.appendChild(document.createElement("p"));
  72         frag.addEventListener("DOMSubtreeModified", function(evt)
  73         {
  74             if (!nonStop && once++)
  75                return;
  76
  77             try {
  78                 mutationHandler(evt, frag, stash);
  79             }
  80             catch(e) {
  81                 logResult(description, expectation(stash, e));
  82                 logged++;
  83             }
  84         }, false);
  85
  86     try {
  87         method(stash, frag);
  88     }
  89     catch(e) {
  90         logResult(description, expectation(stash, e));
  91         logged++;
  92     }
  93     if (!logged)
  94         logResult(description, expectation(stash));
  95     document.body.removeChild(stash);
  96 }
  97
  98 function appendChildMethod(object, subject)
  99 {
 100     object.appendChild(subject);
 101 }
 102
 103 function insertBeforeMethod(object, subject)
 104 {
 105     object.insertBefore(subject, object.firstChild);
 106 }
 107
 108 function runTest(methodName, method)
 109 {
 110     var missing = document.body.appendChild(document.createElement("em"));
 111     testFragment(method, "Inserting an element in front of the next item in fragment should not affect the result", function(evt, frag)
 112     {
 113         frag.insertBefore(missing, frag.firstChild);
 114     }, expectNodes("BUP"));
 115
 116     var extra = document.body.appendChild(document.createElement("em"));
 117     testFragment(method, "Appending an element at the end of the fragment should not affect the result", function(evt, frag)
 118     {
 119         frag.appendChild(extra);
 120     }, expectNodes("BUP"));
 121
 122     testFragment(method, "Continually re-appending removed element to the fragment should eventually throw NOT_FOUND_ERR", function(evt, frag, stash)
 123     {
 124         stash.insertBefore(frag.lastChild, stash.firstChild);
 125     }, expectException(TypeError), true);
 126     printLog(methodName);
 127 }
 128 function runTests()
 129 {
 130     runTest("appendChild", appendChildMethod);
 131     runTest("insertBefore", insertBeforeMethod);
 132 }
 133
 134 </script>
 135 </head>
 136 <body onload="runTests()">
 137 </body>
 138 </html>