[es6] Implement Reflect.enumerate.

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

Index: test/mjsunit/harmony/reflect-enumerate-special-cases.js
diff --git a/test/mjsunit/for-in-special-cases.js b/test/mjsunit/harmony/reflect-enumerate-special-cases.js
similarity index 76%
copy from test/mjsunit/for-in-special-cases.js
copy to test/mjsunit/harmony/reflect-enumerate-special-cases.js
index b592ad259e90b3180c6e2949c7c45439234639dd..234a3e3e0d0171ae1da99156a244066f490e171c 100644
--- a/test/mjsunit/for-in-special-cases.js
+++ b/test/mjsunit/harmony/reflect-enumerate-special-cases.js
@@ -1,4 +1,4 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2008-2015 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,47 +25,14 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-gc
+// This is adapted from mjsunit/for-in-special-cases.js.
 
-function for_in_null() {
-  try {
-    for (var x in null) {
-      return false;
-    }
-  } catch(e) {
-    return false;
-  }
-  return true;
-}
-
-function for_in_undefined() {
-  try {
-    for (var x in undefined) {
-      return false;
-    }
-  } catch(e) {
-    return false;
-  }
-  return true;
-}
-
-for (var i = 0; i < 10; ++i) {
-  assertTrue(for_in_null());
-  gc();
-}
-
-for (var j = 0; j < 10; ++j) {
-  assertTrue(for_in_undefined());
-  gc();
-}
-
-assertEquals(10, i);
-assertEquals(10, j);
+// Flags: --harmony-reflect
 
 
 function Accumulate(x) {
   var accumulator = "";
-  for (var i in x) {
+  for (var i of Reflect.enumerate(Object(x))) {
     accumulator += i;
   }
   return accumulator;
@@ -73,7 +40,7 @@ function Accumulate(x) {
 
 for (var i = 0; i < 3; ++i) {
   var elements = Accumulate("abcd");
-  // We do not assume that for-in enumerates elements in order.
+  // 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"));
@@ -96,10 +63,10 @@ function for_in_string_prototype() {
 
   var elements = Accumulate(y);
   var elements1 = Accumulate(y);
-  // If for-in returns elements in a different order on multiple calls, this
+  // 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, "For-in elements not the same both times.");
-  // We do not assume that for-in enumerates elements in order.
+  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"));