| /* |
| * Copyright (c) 2014, 2016, 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 |
| * @summary close handlers and closing streams |
| * @bug 8044047 8147505 |
| */ |
| |
| package org.openjdk.tests.java.util.stream; |
| |
| import java.util.Arrays; |
| import java.util.stream.OpTestCase; |
| import java.util.stream.Stream; |
| |
| import org.testng.annotations.Test; |
| |
| import static java.util.stream.LambdaTestHelpers.countTo; |
| import static java.util.stream.ThrowableHelper.checkNPE; |
| import static java.util.stream.ThrowableHelper.checkISE; |
| |
| @Test(groups = { "serialization-hostile" }) |
| public class StreamCloseTest extends OpTestCase { |
| public void testNullCloseHandler() { |
| checkNPE(() -> Stream.of(1).onClose(null)); |
| } |
| |
| public void testEmptyCloseHandler() { |
| try (Stream<Integer> ints = countTo(100).stream()) { |
| ints.forEach(i -> {}); |
| } |
| } |
| |
| public void testOneCloseHandler() { |
| final boolean[] holder = new boolean[1]; |
| Runnable closer = () -> { holder[0] = true; }; |
| |
| try (Stream<Integer> ints = countTo(100).stream()) { |
| ints.onClose(closer); |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().onClose(closer)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(closer)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(closer).filter(e -> true)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0]); |
| } |
| |
| public void testTwoCloseHandlers() { |
| final boolean[] holder = new boolean[2]; |
| Runnable close1 = () -> { holder[0] = true; }; |
| Runnable close2 = () -> { holder[1] = true; }; |
| |
| try (Stream<Integer> ints = countTo(100).stream()) { |
| ints.onClose(close1).onClose(close2); |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0] && holder[1]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().onClose(close1).onClose(close2)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0] && holder[1]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(close1).onClose(close2)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0] && holder[1]); |
| |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(close1).onClose(close2).filter(e -> true)) { |
| ints.forEach(i -> {}); |
| } |
| assertTrue(holder[0] && holder[1]); |
| } |
| |
| public void testCascadedExceptions() { |
| final boolean[] holder = new boolean[3]; |
| boolean caught = false; |
| Runnable close1 = () -> { holder[0] = true; throw new RuntimeException("1"); }; |
| Runnable close2 = () -> { holder[1] = true; throw new RuntimeException("2"); }; |
| Runnable close3 = () -> { holder[2] = true; throw new RuntimeException("3"); }; |
| |
| try (Stream<Integer> ints = countTo(100).stream()) { |
| ints.onClose(close1).onClose(close2).onClose(close3); |
| ints.forEach(i -> {}); |
| } |
| catch (RuntimeException e) { |
| assertCascaded(e, 3); |
| assertTrue(holder[0] && holder[1] && holder[2]); |
| caught = true; |
| } |
| assertTrue(caught); |
| |
| Arrays.fill(holder, false); |
| caught = false; |
| try (Stream<Integer> ints = countTo(100).stream().onClose(close1).onClose(close2).onClose(close3)) { |
| ints.forEach(i -> {}); |
| } |
| catch (RuntimeException e) { |
| assertCascaded(e, 3); |
| assertTrue(holder[0] && holder[1] && holder[2]); |
| caught = true; |
| } |
| assertTrue(caught); |
| |
| caught = false; |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(close1).onClose(close2).onClose(close3)) { |
| ints.forEach(i -> {}); |
| } |
| catch (RuntimeException e) { |
| assertCascaded(e, 3); |
| assertTrue(holder[0] && holder[1] && holder[2]); |
| caught = true; |
| } |
| assertTrue(caught); |
| |
| caught = false; |
| Arrays.fill(holder, false); |
| try (Stream<Integer> ints = countTo(100).stream().filter(e -> true).onClose(close1).onClose(close2).filter(e -> true).onClose(close3)) { |
| ints.forEach(i -> {}); |
| } |
| catch (RuntimeException e) { |
| assertCascaded(e, 3); |
| assertTrue(holder[0] && holder[1] && holder[2]); |
| caught = true; |
| } |
| assertTrue(caught); |
| } |
| |
| private void assertCascaded(RuntimeException e, int n) { |
| assertTrue(e.getMessage().equals("1")); |
| assertTrue(e.getSuppressed().length == n - 1); |
| for (int i=0; i<n-1; i++) |
| assertTrue(e.getSuppressed()[i].getMessage().equals(String.valueOf(i + 2))); |
| } |
| |
| public void testConsumed() { |
| try(Stream<Integer> s = countTo(100).stream()) { |
| s.forEach(i -> {}); |
| // Adding onClose handler when stream is consumed is illegal |
| // handler must not be registered |
| checkISE(() -> s.onClose(() -> fail("1"))); |
| } |
| |
| // close() must be idempotent: |
| // second close() invoked at the end of try-with-resources must have no effect |
| try(Stream<Integer> s = countTo(100).stream()) { |
| s.close(); |
| // Adding onClose handler when stream is closed is also illegal |
| checkISE(() -> s.onClose(() -> fail("3"))); |
| } |
| } |
| } |