dom/bindings/test/file_reflected_attribute_frozenarray.js

   1 function checkEquals(value, expected, valueCheckFn = (a, b) => a == b) {
   2   if (!valueCheckFn(value, expected)) {
   3     return `, got ${value}, expected ${expected}`;
   4   }
   5   return undefined;
   6 }
   7
   8 function checkReflectedAttributeWithFrozenArrayValues(obj, values, valueCheck) {
   9   if (!SimpleTest.isa(obj.reflectedHTMLAttribute, "Array")) {
  10     return `, expected array`;
  11   }
  12   let failure = checkEquals(obj.reflectedHTMLAttribute.length, values.length);
  13   if (!failure) {
  14     for (let [i, v] of obj.reflectedHTMLAttribute.entries()) {
  15       failure = checkEquals(values[i], v, valueCheck);
  16       if (failure) {
  17         break;
  18       }
  19     }
  20   }
  21   return failure;
  22 }
  23
  24 function checkReflectedAttributeWithFrozenArray(
  25   obj,
  26   values,
  27   suffix,
  28   valueCheck
  29 ) {
  30   let failure = checkReflectedAttributeWithFrozenArrayValues(
  31     obj,
  32     values,
  33     valueCheck
  34   );
  35   ok(
  36     !failure,
  37     `Cached value on object for HTML reflected FrozenArray attribute should contain the right values ${suffix}${
  38       failure || ""
  39     }`
  40   );
  41 }
  42
  43 function testReflectedAttributeWithFrozenArray(win) {
  44   let testObject = new win.TestReflectedHTMLAttribute();
  45   ok(
  46     testObject instanceof win.TestReflectedHTMLAttribute,
  47     "Got a TestReflectedHTMLAttribute object"
  48   );
  49
  50   is(
  51     testObject.reflectedHTMLAttribute,
  52     null,
  53     "Initial value for HTML reflected FrozenArray attribute should be null"
  54   );
  55
  56   let values = [win.document.head];
  57   testObject.setReflectedHTMLAttributeValue(values);
  58   checkReflectedAttributeWithFrozenArray(testObject, values, "after setting");
  59
  60   values = [win.document.body, win.document.body.firstElementChild];
  61   testObject.setReflectedHTMLAttributeValue(values);
  62   checkReflectedAttributeWithFrozenArray(testObject, values, "after resetting");
  63
  64   // Use a loop to ensure the JITs optimize the getter access.
  65   let failure;
  66   for (let i = 0; i < 10_000; i++) {
  67     failure = checkReflectedAttributeWithFrozenArrayValues(testObject, values);
  68     if (!failure) {
  69       break;
  70     }
  71     if (i == 9_990) {
  72       values = [win.document.head];
  73       testObject.setReflectedHTMLAttributeValue(values);
  74     }
  75   }
  76   ok(
  77     !failure,
  78     `Shouldn't use the cached value for HTML reflected FrozenArray attribute directly from JITted code${
  79       failure || ""
  80     }`
  81   );
  82
  83   is(
  84     testObject.reflectedHTMLAttribute,
  85     testObject.reflectedHTMLAttribute,
  86     "Getter for HTML reflected FrozenArray attribute should return the cached value"
  87   );
  88
  89   return [testObject, values];
  90 }