chrome/test/data/webui/array_data_model_test.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body>
   4
   5 <script>
   6
   7 function testSlice() {
   8   var m = new cr.ui.ArrayDataModel([0, 1, 2]);
   9   assertArrayEquals([0, 1, 2], m.slice());
  10   assertArrayEquals([1, 2], m.slice(1));
  11   assertArrayEquals([1], m.slice(1, 2));
  12 }
  13
  14 function testPush() {
  15   var m = new cr.ui.ArrayDataModel([0, 1, 2]);
  16
  17   var count = 0;
  18   m.addEventListener('splice', function(e) {
  19     count++;
  20     assertEquals(3, e.index);
  21     assertArrayEquals([], e.removed);
  22     assertArrayEquals([3, 4], e.added);
  23   });
  24
  25   assertEquals(5, m.push(3, 4));
  26   var a = m.slice();
  27   assertArrayEquals([0, 1, 2, 3, 4], a);
  28
  29   assertEquals(1, count, 'The splice event should only fire once');
  30 }
  31
  32 function testSplice() {
  33   function compare(array, args) {
  34     var m = new cr.ui.ArrayDataModel(array.slice());
  35     var expected = array.slice();
  36     var result = expected.splice.apply(expected, args);
  37     assertArrayEquals(result, m.splice.apply(m, args));
  38     assertArrayEquals(expected, m.slice());
  39   }
  40
  41   compare([1, 2, 3], []);
  42   compare([1, 2, 3], [0, 0]);
  43   compare([1, 2, 3], [0, 1]);
  44   compare([1, 2, 3], [1, 1]);
  45   compare([1, 2, 3], [0, 3]);
  46   compare([1, 2, 3], [0, 1, 5]);
  47   compare([1, 2, 3], [0, 3, 1, 2, 3]);
  48   compare([1, 2, 3], [5, 3, 1, 2, 3]);
  49 }
  50
  51 function testPermutation() {
  52   function doTest(sourceArray, spliceArgs) {
  53     var m = new cr.ui.ArrayDataModel(sourceArray.slice());
  54     var permutation;
  55     m.addEventListener('permuted', function(event) {
  56       permutation = event.permutation;
  57     });
  58     m.splice.apply(m, spliceArgs);
  59     var deleted = 0;
  60     for (var i = 0; i < sourceArray.length; i++) {
  61       if (permutation[i] == -1)
  62         deleted++;
  63       else
  64         assertEquals(sourceArray[i], m.item(permutation[i]));
  65     }
  66     assertEquals(deleted, spliceArgs[1]);
  67   }
  68
  69   doTest([1, 2, 3], [0, 0]);
  70   doTest([1, 2, 3], [0, 1]);
  71   doTest([1, 2, 3], [1, 1]);
  72   doTest([1, 2, 3], [0, 3]);
  73   doTest([1, 2, 3], [0, 1, 5]);
  74   doTest([1, 2, 3], [0, 3, 1, 2, 3]);
  75 }
  76
  77 function testUpdateIndexes() {
  78   var m = new cr.ui.ArrayDataModel([1, 2, 3]);
  79   var changedIndexes = [];
  80   m.addEventListener('change', function(event) {
  81     changedIndexes.push(event.index);
  82   });
  83   m.updateIndexes([0, 1, 2]);
  84   assertArrayEquals([0, 1, 2], changedIndexes);
  85 }
  86
  87 function testReplaceItem() {
  88   var m = new cr.ui.ArrayDataModel([1, 2, 3]);
  89   var permutation = null;
  90   var changeIndex;
  91   m.addEventListener('permuted', function(event) {
  92     permutation = event.permutation;
  93   });
  94   m.addEventListener('change', function(event) {
  95     changeIndex = event.index;
  96   });
  97   m.replaceItem(2, 4);
  98   assertEquals(null, permutation);
  99   assertEquals(1, changeIndex);
 100 }
 101
 102 </script>
 103
 104 </body>
 105 </html>