tests/stress/array-iterators-next-with-call.js

   1 // This test checks the behavior of the %ArrayIteratorPrototype%.next methods with call.
   2
   3 var array = [0, 1, 2, 3, 4];
   4 var arrayIterator = array[Symbol.iterator]();
   5 var arrayIteratorPrototype = arrayIterator.__proto__;
   6 var arrayIteratorPrototypeNext = arrayIteratorPrototype.next;
   7
   8 if (arrayIterator.hasOwnProperty('next'))
   9     throw "next method should exists on %ArrayIteratorPrototype%";
  10 if (!arrayIteratorPrototype.hasOwnProperty('next'))
  11     throw "next method should exists on %ArrayIteratorPrototype%";
  12
  13 var array1 = [42, 43, 41];
  14 var array1Iterator = array1[Symbol.iterator]();
  15 var index = 0;
  16 while (true) {
  17     var result = arrayIteratorPrototypeNext.call(array1Iterator);
  18     var value = result.value;
  19     if (result.done) {
  20         break;
  21     }
  22     if (value !== array1[index++])
  23         throw "Error: bad value: " + value;
  24 }
  25 if (index !== 3)
  26     throw "Error: bad index: " + index;
  27
  28 function increment(iter) {
  29     return arrayIteratorPrototypeNext.call(iter);
  30 }
  31 var array1 = [42, 43, -20];
  32 var array2 = [42, 43, -20];
  33 var array1Iterator = array1[Symbol.iterator]();
  34 var array2Iterator = array2[Symbol.iterator]();
  35 for (var i = 0; i < 3; ++i) {
  36     var value1 = increment(array1Iterator).value;
  37     var value2 = increment(array2Iterator).value;
  38     if (value1 !== value2)
  39         throw "Error: bad value: " + value1 + " " + value2;
  40 }
  41
  42 var array1 = [ 0, 1, 2, 4, 5, 6 ];
  43 var array1Iterator = array1[Symbol.iterator]();
  44
  45 var value = array1Iterator.next().value;
  46 if (value !== 0)
  47     throw "Error: bad value: " + value;
  48 var value = array1Iterator.next().value;
  49 if (value !== 1)
  50     throw "Error: bad value: " + value;
  51 var value = array1Iterator.next().value;
  52 if (value !== 2)
  53     throw "Error: bad value: " + value;
  54 var value = arrayIteratorPrototypeNext.call(array1Iterator).value;
  55 if (value !== 4)
  56     throw "Error: bad value: " + value;
  57 var value = arrayIteratorPrototypeNext.call(array1Iterator).value;
  58 if (value !== 5)
  59     throw "Error: bad value: " + value;
  60 var value = arrayIteratorPrototypeNext.call(array1Iterator).value;
  61 if (value !== 6)
  62     throw "Error: bad value: " + value;
  63 var value = arrayIteratorPrototypeNext.call(array1Iterator).value;
  64 if (value !== undefined)
  65     throw "Error: bad value: " + value;
  66
  67 var primitives = [
  68     "string",
  69     42,
  70     0.03,
  71     false,
  72     true,
  73     Symbol("Cocoa"),
  74     null,
  75     undefined
  76 ];
  77 for (var primitive of primitives) {
  78     var didThrow = null;
  79     try {
  80         arrayIteratorPrototypeNext.call(primitive);
  81     } catch (e) {
  82         didThrow = e;
  83     }
  84     if (!didThrow)
  85         throw "Error: no error thrown";
  86     var expectedMessage = 'TypeError: %ArrayIteratorPrototype%.next requires that |this| be an Array Iterator instance';
  87     if (primitive == null)
  88         expectedMessage = 'TypeError: %ArrayIteratorPrototype%.next requires that |this| not be null or undefined';
  89     if (String(didThrow) !== expectedMessage)
  90         throw "Error: bad error thrown: " + didThrow;
  91 }
  92
  93 var nonRelatedObjects = [
  94     {},
  95     [],
  96     new Date(),
  97     new Error(),
  98     Object(Symbol()),
  99     new String("Cappuccino"),
 100     new Number(42),
 101     new Boolean(false),
 102     function () { },
 103 ];
 104 for (var object of nonRelatedObjects) {
 105     var didThrow = null;
 106     try {
 107         arrayIteratorPrototypeNext.call(object);
 108     } catch (e) {
 109         didThrow = e;
 110     }
 111     if (!didThrow)
 112         throw "Error: no error thrown";
 113     if (String(didThrow) !== 'TypeError: %ArrayIteratorPrototype%.next requires that |this| be an Array Iterator instance')
 114         throw "Error: bad error thrown: " + didThrow;
 115 }