65 lines
2.4 KiB
Java
65 lines
2.4 KiB
Java
/*
|
|
* Copyright (c) 2024, 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.
|
|
*/
|
|
import java.util.List;
|
|
import java.util.stream.Collectors;
|
|
import java.util.stream.Gatherer;
|
|
|
|
import org.junit.jupiter.api.Test;
|
|
import static org.junit.jupiter.api.Assertions.*;
|
|
import static org.junit.jupiter.api.Assumptions.*;
|
|
|
|
/**
|
|
* @test
|
|
* @bug 8328316
|
|
* @summary Testing Gatherer behavior under short circuiting
|
|
* @run junit GathererShortCircuitTest
|
|
*/
|
|
|
|
public class GathererShortCircuitTest {
|
|
@Test
|
|
public void mustBeAbleToPushFromFinisher() {
|
|
Integer expected = 8328316;
|
|
List<Integer> source = List.of(1,2,3,4,5);
|
|
|
|
Gatherer<Integer, ?, Integer> pushOneInFinisher =
|
|
Gatherer.of(
|
|
(_, element, downstream) -> false,
|
|
(_, downstream) -> downstream.push(expected)
|
|
);
|
|
|
|
var usingCollect =
|
|
source.stream().gather(pushOneInFinisher).collect(Collectors.toList());
|
|
var usingBuiltin =
|
|
source.stream().gather(pushOneInFinisher).toList();
|
|
var usingCollectPar =
|
|
source.stream().parallel().gather(pushOneInFinisher).collect(Collectors.toList());
|
|
var usingBuiltinPar =
|
|
source.stream().parallel().gather(pushOneInFinisher).toList();
|
|
|
|
assertEquals(List.of(expected), usingCollect);
|
|
assertEquals(List.of(expected), usingBuiltin);
|
|
assertEquals(List.of(expected), usingCollectPar);
|
|
assertEquals(List.of(expected), usingBuiltinPar);
|
|
}
|
|
}
|