test/tools/javac/lambda/LambdaConv08.java

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1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 8003280
27 * @summary Add lambda tests
28 * check that SAM conversion handles covarinat return types correctly
29 * @author Peter Levart
30 * @author Maurizio Cimadamore
31 * @run main LambdaConv08
32 */
33
34 public class LambdaConv08 {
35
36 static int assertionCount = 0;
37
38 static void assertTrue(boolean cond) {
39 assertionCount++;
40 if (!cond)
41 throw new AssertionError();
42 }
43
44 public interface ObjectF { Object invoke(); }
45 public interface StringF extends ObjectF { String invoke(); }
46
47 public static void call(StringF stringFunc) {
48 assertTrue(true);
49 }
50
51 public static void call(ObjectF objectFunc) { }
52
53 public static void main(String[] args) {
54 call(()-> "Hello");
55 assertTrue(assertionCount == 1);
56 }
57 }

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