Add corelib tests

test/codegen/corelib/double_truncate2_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Test that a class with a [call] property does not implement [Function] or
-// a typedef of function type.
-
 import 'package:expect/expect.dart';
 
-class Call {
-  int get call => 0;
+main() {
+  Expect.throws(() => double.INFINITY.truncate(), (e) => e is UnsupportedError);
+  Expect.throws(() => double.NEGATIVE_INFINITY.truncate(),
+                (e) => e is UnsupportedError);
+  Expect.throws(() => double.NAN.truncate(), (e) => e is UnsupportedError);
 }
-
-typedef void F();
-
-main() {
-  Expect.isFalse(new Call() is Function);
-  Expect.isFalse(new Call() is F);
-}