aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 7020047
aoqi@0:  * @summary Test null handling of try-with-resources statement
aoqi@0:  */
aoqi@0: 
aoqi@0: public class TwrNullTests {
aoqi@0:     /*
aoqi@0:      * Each try-with-resources statement generates two calls to the
aoqi@0:      * close method for each resource: one for when there is a primary
aoqi@0:      * exception present and the second for when a primary exception
aoqi@0:      * is absent.  The null handling of both cases needs to be
aoqi@0:      * checked.
aoqi@0:      */
aoqi@0:     public static void main(String... args) {
aoqi@0:         testNormalCompletion();
aoqi@0:         testNoSuppression();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*
aoqi@0:      * Verify empty try-with-resources on a null resource completes
aoqi@0:      * normally; no NPE from the generated close call.
aoqi@0:      */
aoqi@0:     private static void testNormalCompletion() {
aoqi@0:         try(AutoCloseable resource = null) {
aoqi@0:             return; // Nothing to see here, move along.
aoqi@0:         } catch (Exception e) {
aoqi@0:             throw new AssertionError("Should not be reached", e);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*
aoqi@0:      * Verify that a NPE on a null resource is <em>not</em> added as a
aoqi@0:      * suppressed exception to an exception from try block.
aoqi@0:      */
aoqi@0:     private static void testNoSuppression() {
aoqi@0:         try(AutoCloseable resource = null) {
aoqi@0:             throw new java.io.IOException();
aoqi@0:         } catch(java.io.IOException ioe) {
aoqi@0:             Throwable[] suppressed = ioe.getSuppressed();
aoqi@0:             if (suppressed.length != 0) {
aoqi@0:                 throw new AssertionError("Non-empty suppressed exceptions",
aoqi@0:                                          ioe);
aoqi@0:             }
aoqi@0:         } catch (Exception e) {
aoqi@0:             throw new AssertionError("Should not be reached", e);
aoqi@0:         }
aoqi@0:     }
aoqi@0: }