1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/test/tools/javac/TryWithResources/TwrNullTests.java Wed Apr 27 01:34:52 2016 +0800 1.3 @@ -0,0 +1,72 @@ 1.4 +/* 1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 1.23 + * or visit www.oracle.com if you need additional information or have any 1.24 + * questions. 1.25 + */ 1.26 + 1.27 +/* 1.28 + * @test 1.29 + * @bug 7020047 1.30 + * @summary Test null handling of try-with-resources statement 1.31 + */ 1.32 + 1.33 +public class TwrNullTests { 1.34 + /* 1.35 + * Each try-with-resources statement generates two calls to the 1.36 + * close method for each resource: one for when there is a primary 1.37 + * exception present and the second for when a primary exception 1.38 + * is absent. The null handling of both cases needs to be 1.39 + * checked. 1.40 + */ 1.41 + public static void main(String... args) { 1.42 + testNormalCompletion(); 1.43 + testNoSuppression(); 1.44 + } 1.45 + 1.46 + /* 1.47 + * Verify empty try-with-resources on a null resource completes 1.48 + * normally; no NPE from the generated close call. 1.49 + */ 1.50 + private static void testNormalCompletion() { 1.51 + try(AutoCloseable resource = null) { 1.52 + return; // Nothing to see here, move along. 1.53 + } catch (Exception e) { 1.54 + throw new AssertionError("Should not be reached", e); 1.55 + } 1.56 + } 1.57 + 1.58 + /* 1.59 + * Verify that a NPE on a null resource is <em>not</em> added as a 1.60 + * suppressed exception to an exception from try block. 1.61 + */ 1.62 + private static void testNoSuppression() { 1.63 + try(AutoCloseable resource = null) { 1.64 + throw new java.io.IOException(); 1.65 + } catch(java.io.IOException ioe) { 1.66 + Throwable[] suppressed = ioe.getSuppressed(); 1.67 + if (suppressed.length != 0) { 1.68 + throw new AssertionError("Non-empty suppressed exceptions", 1.69 + ioe); 1.70 + } 1.71 + } catch (Exception e) { 1.72 + throw new AssertionError("Should not be reached", e); 1.73 + } 1.74 + } 1.75 +}