Add support for DateTimeFormat.formatToParts

test/intl/assert.js

Index: test/intl/assert.js
diff --git a/test/intl/assert.js b/test/intl/assert.js
index e17615267ae327ea25b60db0a67e99d11fbb6a49..26405e8e9e1665a3d859dac2e420191150112c73 100644
--- a/test/intl/assert.js
+++ b/test/intl/assert.js
@@ -27,6 +27,14 @@
 
 // Some methods are taken from v8/test/mjsunit/mjsunit.js
 
+
+function classOf(object) {
+   // Argument must not be null or undefined.
+   var string = Object.prototype.toString.call(object);
+   // String has format [object <ClassName>].
+   return string.substring(8, string.length - 1);
+}
+
 /**
  * Compares two objects for key/value equality.
  * Returns true if they are equal, false otherwise.