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1 /* |
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * @bug 8003280 |
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27 * @summary Add lambda tests |
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28 * basic test for capture of non-mutable locals |
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29 * @author Brian Goetz |
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30 * @author Maurizio Cimadamore |
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31 * @run main LambdaCapture01 |
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32 */ |
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33 |
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34 public class LambdaCapture01 { |
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35 |
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36 static int assertionCount = 0; |
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37 |
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38 static void assertTrue(boolean cond) { |
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39 assertionCount++; |
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40 if (!cond) |
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41 throw new AssertionError(); |
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42 } |
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43 |
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44 interface Tester { |
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45 void test(); |
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46 } |
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47 |
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48 interface TU<T, U> { |
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49 public T foo(U u); |
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50 } |
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51 |
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52 public static <T, U> T exec(TU<T, U> lambda, U x) { |
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53 return lambda.foo(x); |
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54 } |
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55 |
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56 public int n = 5; |
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57 |
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58 //Simple local capture |
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59 void test1() { |
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60 final int N = 1; |
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61 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N, 3); |
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62 assertTrue(4 == res); |
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63 } |
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64 |
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65 //Local capture with multiple scopes (anon class) |
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66 void test2() { |
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67 final int N = 1; |
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68 new Tester() { |
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69 public void test() { |
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70 final int M = 2; |
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71 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3); |
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72 assertTrue(6 == res); |
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73 } |
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74 }.test(); |
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75 } |
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76 |
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77 //Local capture with multiple scopes (local class) |
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78 void test3() { |
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79 final int N = 1; |
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80 class MyTester implements Tester { |
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81 public void test() { |
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82 final int M = 2; |
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83 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3); |
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84 assertTrue(6 == res); |
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85 } |
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86 } |
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87 new MyTester().test(); |
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88 } |
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89 |
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90 //access to field from enclosing scope |
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91 void test4() { |
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92 final int N = 4; |
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93 int res1 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + n + N, 3); |
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94 assertTrue(12 == res1); |
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95 int res2 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + LambdaCapture01.this.n + N, 3); |
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96 assertTrue(12 == res2); |
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97 } |
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98 |
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99 public static void main(String[] args) { |
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100 LambdaCapture01 t = new LambdaCapture01(); |
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101 t.test1(); |
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102 t.test2(); |
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103 t.test3(); |
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104 t.test4(); |
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105 assertTrue(assertionCount == 5); |
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106 } |
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107 } |