73 lines
2.5 KiB
Java
73 lines
2.5 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import org.testng.annotations.Test;
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import java.util.List;
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import java.util.function.Consumer;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import static org.testng.Assert.assertEquals;
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/*
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* THE CONTENTS OF THIS FILE HAVE TO BE IN SYNC WITH THE EXAMPLES USED IN THE JAVADOC.
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*
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* @test
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* @run testng/othervm JavadocExamples
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* @summary Checks to ensure example code displayed in the API documentation of
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* java/util/Stream compiles correctly.
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*/
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public class JavadocExamples {
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// From mapMulti
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@Test
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public void testNumberIntegerExample() {
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Stream<Number> numbers = Stream.of(1, 2, 3.0);
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List<Integer> integers = numbers.<Integer>mapMulti((number, consumer) -> {
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if (number instanceof Integer i)
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consumer.accept(i);
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})
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.collect(Collectors.toList());
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assertEquals(integers, List.of(1,2));
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}
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@Test
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public void testExpandIterableExample() {
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var nestedList = List.of(1, List.of(2, List.of(3, 4)), 5);
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Stream<Object> expandedStream = nestedList.stream().mapMulti(C::expandIterable);
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assertEquals(expandedStream.toList(), List.of(1,2,3,4,5));
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}
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static class C {
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static void expandIterable(Object e, Consumer<Object> c) {
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if (e instanceof Iterable<?> elements) {
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for (Object ie : elements) {
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expandIterable(ie, c);
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}
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} else if (e != null) {
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c.accept(e);
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}
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}
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}
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}
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