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