|  | // Copyright (c) 2011, 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. | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  |  | 
|  | int? one; | 
|  | int? x; | 
|  |  | 
|  | void testOne() { | 
|  | Expect.equals(1, one); | 
|  | } | 
|  |  | 
|  | void testX(var expected) { | 
|  | Expect.equals(expected, x); | 
|  | } | 
|  |  | 
|  | void increaseX() { | 
|  | x = x! + 1; | 
|  | } | 
|  |  | 
|  | void main() { | 
|  | one = 1; | 
|  | x = 5; | 
|  | Expect.equals(1, one); | 
|  | testOne(); | 
|  | Expect.equals(5, x); | 
|  | testX(5); | 
|  | x = x! + 1; | 
|  | Expect.equals(6, x); | 
|  | testX(6); | 
|  | increaseX(); | 
|  | Expect.equals(7, x); | 
|  | testX(7); | 
|  | } |