Implementing TypeError and TypeError.prototype built-ins. Fixing Error.prototype.toString implementation.

tests/jerry/error.js

@@ -14,19 +14,61 @@
 
 var e;
 
+/* Error */
 e = new Error ();
 assert (e.name === "Error");
 assert (e.message === "");
-assert (e.toString() === "Error: ");
+assert (e.toString() === "Error");
 
 e = new Error("some message");
 assert (e.name === "Error");
 assert (e.message === "some message");
 assert (e.toString() === "Error: some message");
 
+e.name = "";
+assert (e.toString() === "some message");
+e.message = "";
+assert (e.toString() === "");
 
 assert (Error.prototype.toString !== Object.prototype.toString);
 assert (Error.prototype.constructor === Error);
 assert (Error.prototype.name === "Error");
 assert (Error.prototype.message === "");
-assert (Error.prototype.toString() === "Error: ");
+assert (Error.prototype.toString() === "Error");
+
+/* TypeError */
+e = new TypeError ();
+assert (e.name === "TypeError");
+assert (e.message === "");
+assert (e.toString() === "TypeError");
+
+e = new TypeError("some message");
+assert (e.name === "TypeError");
+assert (e.message === "some message");
+assert (e.toString() === "TypeError: some message");
+
+e.name = "";
+assert (e.toString() === "some message");
+e.message = "";
+assert (e.toString() === "");
+
+assert (TypeError.prototype.toString === Error.prototype.toString);
+assert (TypeError.prototype.constructor === TypeError);
+assert (TypeError.prototype.name === "TypeError");
+assert (TypeError.prototype.message === "");
+assert (TypeError.prototype.toString() === "TypeError");
+
+try
+{
+  null[1] = 'abcd';
+
+  assert (false);
+}
+catch (e)
+{
+  assert(e instanceof TypeError);
+  assert(e instanceof Error);
+  assert(e instanceof Object);
+
+  assert(!(e instanceof Function));
+}