tor-browser

The Tor Browser
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Node-compareDocumentPosition.html (3358B)

      1 <!doctype html>
      2 <title>Node.compareDocumentPosition() tests</title>
      3 <link rel=author title="Aryeh Gregor" href=ayg@aryeh.name>
      4 <div id=log></div>
      5 <script src=/resources/testharness.js></script>
      6 <script src=/resources/testharnessreport.js></script>
      7 <script src=../common.js></script>
      8 <script>
      9 "use strict";
     10 
     11 testNodes.forEach(function(referenceName) {
     12  var reference = eval(referenceName);
     13  testNodes.forEach(function(otherName) {
     14    var other = eval(otherName);
     15    test(function() {
     16      var result = reference.compareDocumentPosition(other);
     17 
     18      // "If other and reference are the same object, return zero and
     19      // terminate these steps."
     20      if (other === reference) {
     21        assert_equals(result, 0);
     22        return;
     23      }
     24 
     25      // "If other and reference are not in the same tree, return the result of
     26      // adding DOCUMENT_POSITION_DISCONNECTED,
     27      // DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, and either
     28      // DOCUMENT_POSITION_PRECEDING or DOCUMENT_POSITION_FOLLOWING, with the
     29      // constraint that this is to be consistent, together and terminate these
     30      // steps."
     31      if (furthestAncestor(reference) !== furthestAncestor(other)) {
     32        // TODO: Test that it's consistent.
     33        assert_in_array(result, [Node.DOCUMENT_POSITION_DISCONNECTED +
     34                                 Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC +
     35                                 Node.DOCUMENT_POSITION_PRECEDING,
     36                                 Node.DOCUMENT_POSITION_DISCONNECTED +
     37                                 Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC +
     38                                 Node.DOCUMENT_POSITION_FOLLOWING]);
     39        return;
     40      }
     41 
     42      // "If other is an ancestor of reference, return the result of
     43      // adding DOCUMENT_POSITION_CONTAINS to DOCUMENT_POSITION_PRECEDING
     44      // and terminate these steps."
     45      var ancestor = reference.parentNode;
     46      while (ancestor && ancestor !== other) {
     47        ancestor = ancestor.parentNode;
     48      }
     49      if (ancestor === other) {
     50        assert_equals(result, Node.DOCUMENT_POSITION_CONTAINS +
     51                              Node.DOCUMENT_POSITION_PRECEDING);
     52        return;
     53      }
     54 
     55      // "If other is a descendant of reference, return the result of adding
     56      // DOCUMENT_POSITION_CONTAINED_BY to DOCUMENT_POSITION_FOLLOWING and
     57      // terminate these steps."
     58      ancestor = other.parentNode;
     59      while (ancestor && ancestor !== reference) {
     60        ancestor = ancestor.parentNode;
     61      }
     62      if (ancestor === reference) {
     63        assert_equals(result, Node.DOCUMENT_POSITION_CONTAINED_BY +
     64                              Node.DOCUMENT_POSITION_FOLLOWING);
     65        return;
     66      }
     67 
     68      // "If other is preceding reference return DOCUMENT_POSITION_PRECEDING
     69      // and terminate these steps."
     70      var prev = previousNode(reference);
     71      while (prev && prev !== other) {
     72        prev = previousNode(prev);
     73      }
     74      if (prev === other) {
     75        assert_equals(result, Node.DOCUMENT_POSITION_PRECEDING);
     76        return;
     77      }
     78 
     79      // "Return DOCUMENT_POSITION_FOLLOWING."
     80      assert_equals(result, Node.DOCUMENT_POSITION_FOLLOWING);
     81    }, referenceName + ".compareDocumentPosition(" + otherName + ")");
     82  });
     83 });
     84 
     85 testDiv.parentNode.removeChild(testDiv);
     86 </script>
     87 <!-- vim: set expandtab tabstop=2 shiftwidth=2: -->