test/mjsunit/harmony/reflect-enumerate-special-cases.js

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// This is adapted from mjsunit/for-in-special-cases.js.

// Flags: --harmony-reflect


function Accumulate(x) {
  var accumulator = "";
  for (var i of Reflect.enumerate(Object(x))) {
    accumulator += i;
  }
  return accumulator;
}

for (var i = 0; i < 3; ++i) {
  var elements = Accumulate("abcd");
  // We do not assume that enumerate enumerates elements in order.
  assertTrue(-1 != elements.indexOf("0"));
  assertTrue(-1 != elements.indexOf("1"));
  assertTrue(-1 != elements.indexOf("2"));
  assertTrue(-1 != elements.indexOf("3"));
  assertEquals(4, elements.length);
}

function for_in_string_prototype() {

  var x = new String("abc");
  x.foo = 19;
  function B() {
    this.bar = 5;
    this[7] = 4;
  }
  B.prototype = x;

  var y = new B();
  y.gub = 13;

  var elements = Accumulate(y);
  var elements1 = Accumulate(y);
  // If enumerate returns elements in a different order on multiple calls, this
  // assert will fail.  If that happens, consider if that behavior is OK.
  assertEquals(elements, elements1, "Enumeration not the same both times.");
  // We do not assume that enumerate enumerates elements in order.
  assertTrue(-1 != elements.indexOf("0"));
  assertTrue(-1 != elements.indexOf("1"));
  assertTrue(-1 != elements.indexOf("2"));
  assertTrue(-1 != elements.indexOf("7"));
  assertTrue(-1 != elements.indexOf("foo"));
  assertTrue(-1 != elements.indexOf("bar"));
  assertTrue(-1 != elements.indexOf("gub"));
  assertEquals(13, elements.length);

  elements = Accumulate(x);
  assertTrue(-1 != elements.indexOf("0"));
  assertTrue(-1 != elements.indexOf("1"));
  assertTrue(-1 != elements.indexOf("2"));
  assertTrue(-1 != elements.indexOf("foo"));
  assertEquals(6, elements.length);
}

for_in_string_prototype();
for_in_string_prototype();