Mon, 21 Jan 2013 11:16:28 -0800
Merge
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 */
24 /*
25 * @test
26 * @bug 7020047
27 * @summary Test null handling of try-with-resources statement
28 */
30 public class TwrNullTests {
31 /*
32 * Each try-with-resources statement generates two calls to the
33 * close method for each resource: one for when there is a primary
34 * exception present and the second for when a primary exception
35 * is absent. The null handling of both cases needs to be
36 * checked.
37 */
38 public static void main(String... args) {
39 testNormalCompletion();
40 testNoSuppression();
41 }
43 /*
44 * Verify empty try-with-resources on a null resource completes
45 * normally; no NPE from the generated close call.
46 */
47 private static void testNormalCompletion() {
48 try(AutoCloseable resource = null) {
49 return; // Nothing to see here, move along.
50 } catch (Exception e) {
51 throw new AssertionError("Should not be reached", e);
52 }
53 }
55 /*
56 * Verify that a NPE on a null resource is <em>not</em> added as a
57 * suppressed exception to an exception from try block.
58 */
59 private static void testNoSuppression() {
60 try(AutoCloseable resource = null) {
61 throw new java.io.IOException();
62 } catch(java.io.IOException ioe) {
63 Throwable[] suppressed = ioe.getSuppressed();
64 if (suppressed.length != 0) {
65 throw new AssertionError("Non-empty suppressed exceptions",
66 ioe);
67 }
68 } catch (Exception e) {
69 throw new AssertionError("Should not be reached", e);
70 }
71 }
72 }