Add throwing of missing range error to Date.prototype.toISOString()

JerryScript-DCO-1.0-Signed-off-by: Roland Takacs rtakacs.u-szeged@partner.samsung.com

tests/jerry/date-tostring.js

@@ -65,10 +65,29 @@ catch (e)
   assert (e.message === "Incompatible type");
 }
 
-assert (new Date (NaN).toISOString () == "Invalid Date");
 assert (new Date ("2015-07-16").toISOString () == "2015-07-16T00:00:00.000Z");
 assert (new Date ("2015-07-16T11:29:05.023").toISOString () == "2015-07-16T11:29:05.023Z");
 
+try
+{
+  new Date (NaN).toISOString ();
+  assert (false);
+}
+catch (e)
+{
+  assert (e instanceof RangeError);
+}
+
+try
+{
+  new Date (Number.POSITIVE_INFINITY).toISOString ();
+  assert (false);
+}
+catch (e)
+{
+  assert (e instanceof RangeError);
+}
+
 try
 {
   Date.prototype.toISOString.call(-1);