Add Array.prototype.reduce and .reduceRight.

test/mjsunit/mjsunit.js

 // Copyright 2008 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 35 matching lines @@
     start = "Fail" + "ure (" + name_opt + "): ";
   } else {
     start = "Fail" + "ure:";
   }
   throw new MjsUnitAssertionError(start + " expected <" + expected + "> found <" + found + ">");
 }
 
 
 function deepEquals(a, b) {
   if (a == b) return true;
+  if (typeof a == "number" && typeof b == "number" && isNaN(a) && isNaN(b)) {
+    return true;
+  }
   if ((typeof a) !== 'object' || (typeof b) !== 'object' ||
       (a === null) || (b === null))
     return false;
   if (a.constructor === Array) {
     if (b.constructor !== Array)
       return false;
     if (a.length != b.length)
       return false;
     for (var i = 0; i < a.length; i++) {
       if (i in a) {
@@ skipping 90 matching lines @@
 
 
 function assertUnreachable(name_opt) {
   // Fix this when we ditch the old test runner.
   var message = "Fail" + "ure: unreachable"
   if (name_opt) {
     message += " - " + name_opt;
   }
   throw new MjsUnitAssertionError(message);
 }