tor-browser

The Tor Browser
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attributes-namednodemap.html (3908B)

      1 <!DOCTYPE HTML>
      2 <title>Tests of some tricky semantics around NamedNodeMap and the element.attributes collection</title>
      3 <link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
      4 <link rel="help" href="https://dom.spec.whatwg.org/#interface-namednodemap">
      5 <link rel="help" href="https://dom.spec.whatwg.org/#dom-element-attributes">
      6 
      7 <script src="/resources/testharness.js"></script>
      8 <script src="/resources/testharnessreport.js"></script>
      9 
     10 <script>
     11 "use strict";
     12 
     13 test(() => {
     14 
     15  const element = document.createElement("div");
     16  element.setAttribute("x", "first");
     17 
     18  assert_equals(element.attributes.length, 1, "one attribute");
     19  assert_equals(element.attributes.x.value, "first");
     20 
     21 }, "an attribute set by setAttribute should be accessible as a field on the `attributes` field of an Element");
     22 
     23 test(() => {
     24 
     25  const element = document.createElement("div");
     26  const map = element.attributes;
     27 
     28  assert_equals(map.length, 0);
     29 
     30  const attr1 = document.createAttribute("attr1");
     31  map.setNamedItem(attr1);
     32  assert_equals(map.attr1, attr1);
     33  assert_equals(map.length, 1);
     34 
     35  const attr2 = document.createAttribute("attr2");
     36  map.setNamedItem(attr2);
     37  assert_equals(map.attr2, attr2);
     38  assert_equals(map.length, 2);
     39 
     40  const rm1 = map.removeNamedItem("attr1");
     41  assert_equals(rm1, attr1);
     42  assert_equals(map.length, 1);
     43 
     44  const rm2 = map.removeNamedItem("attr2");
     45  assert_equals(rm2, attr2);
     46  assert_equals(map.length, 0);
     47 
     48 }, "setNamedItem and removeNamedItem on `attributes` should add and remove fields from `attributes`");
     49 
     50 test(() => {
     51 
     52  const element = document.createElement("div");
     53  const map = element.attributes;
     54 
     55  const fooAttribute = document.createAttribute("foo");
     56  map.setNamedItem(fooAttribute);
     57 
     58  const itemAttribute = document.createAttribute("item");
     59  map.setNamedItem(itemAttribute);
     60 
     61  assert_equals(map.foo, fooAttribute);
     62  assert_equals(map.item, NamedNodeMap.prototype.item);
     63  assert_equals(typeof map.item, "function");
     64 
     65  map.removeNamedItem("item");
     66  assert_equals(map.item, NamedNodeMap.prototype.item);
     67  assert_equals(typeof map.item, "function");
     68 
     69 }, "setNamedItem and removeNamedItem on `attributes` should not interfere with existing method names");
     70 
     71 test(() => {
     72 
     73  const element = document.createElement("div");
     74  element.setAttributeNS(null, "x", "first");
     75 
     76  assert_equals(element.attributes.length, 1, "one attribute");
     77  assert_equals(element.attributes.x.value, "first");
     78 
     79 }, "an attribute with a null namespace should be accessible as a field on the `attributes` field of an Element");
     80 
     81 test(() => {
     82 
     83  const element = document.createElement("div");
     84  element.setAttributeNS("foo", "x", "first");
     85 
     86  assert_equals(element.attributes.length, 1, "one attribute");
     87  assert_equals(element.attributes.x.value, "first");
     88 
     89 }, "an attribute with a set namespace should be accessible as a field on the `attributes` field of an Element");
     90 
     91 test(() => {
     92 
     93  const element = document.createElement("div");
     94  element.setAttributeNS("foo", "setNamedItem", "first");
     95 
     96  assert_equals(element.attributes.length, 1, "one attribute");
     97  assert_equals(typeof element.attributes.setNamedItem, "function");
     98 
     99 }, "setting an attribute should not overwrite the methods of an `NamedNodeMap` object");
    100 
    101 test(() => {
    102 
    103  const element = document.createElement("div");
    104  element.setAttributeNS("foo", "toString", "first");
    105 
    106  assert_equals(element.attributes.length, 1, "one attribute");
    107  assert_equals(typeof element.attributes.toString, "function");
    108 
    109 }, "setting an attribute should not overwrite the methods defined by prototype ancestors of an `NamedNodeMap` object");
    110 
    111 test(() => {
    112 
    113  const element = document.createElement("div");
    114  element.setAttributeNS("foo", "length", "first");
    115 
    116  assert_equals(element.attributes.length, 1, "one attribute");
    117 
    118 }, "setting an attribute should not overwrite the length property of an `NamedNodeMap` object");
    119 
    120 </script>