| // 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. |
| // Dart test program for constructors and initializers. |
| |
| import "package:expect/expect.dart"; |
| |
| // Expect the initializer expressions E(i) to be evaluated |
| // in the order 1, 2, 3, ... |
| // Each expression must be evaluated exactly once. |
| |
| String trace = ""; |
| |
| int E(int i) { |
| trace += "$i-"; |
| return i; |
| } |
| |
| class A { |
| var a1; |
| A(x, y) : a1 = E(4) { |
| Expect.equals(2, x); |
| Expect.equals(3, y); |
| Expect.equals(4, a1); |
| E(6); |
| } |
| } |
| |
| class B extends A { |
| var b1, b2; |
| |
| B(x) |
| : b1 = E(1), |
| b2 = E(5), |
| super(E(2), E(3)) { |
| Expect.equals(1, b1); |
| Expect.equals(5, b2); |
| E(7); |
| } |
| } |
| |
| main() { |
| var b = new B(0); |
| Expect.equals("1-5-2-3-4-6-7-", trace); |
| } |