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23 
24 import org.testng.annotations.Test;
25 
26 import static org.testng.Assert.assertEquals;
27 
28 /**
29  * LambdaTranslationCompoundSamTest
30  *
31  * @author Brian Goetz
32  */
33 @Test
34 public class LambdaTranslationCompoundSamTest {
35     interface Accepts<T> {
accept(T t)36         void accept(T t);
37     }
38 
39     interface AcceptsInt {
accept(int i)40         void accept(int i);
41     }
42 
43     interface A<T> extends Accepts<T> {
44 
accept(int value)45         default void accept(int value) {
46             throw new IllegalStateException();
47         }
48 
49         interface OfInt extends A<Integer>, AcceptsInt {
50             @Override
accept(int value)51             void accept(int value);
52 
53             @Override
accept(Integer i)54             default void accept(Integer i) {
55                 accept(i.intValue());
56             }
57         }
58     }
59 
60     protected interface Target<T> extends A<T> {
61         public interface OfInt extends Target<Integer>, A.OfInt { }
62     }
63 
testConversion()64     public void testConversion() {
65         int[] result = new int[4];
66 
67         Target<Integer> tb = (Integer i) -> { result[0] = i+1; };
68         tb.accept((Integer) 3);
69         assertEquals(4, result[0]);
70 
71         Target.OfInt ti = (int i) -> { result[1] = i+1; };
72         ti.accept(7);
73         assertEquals(8, result[1]);
74     }
75 }
76