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/*
* Copyright (c) 2021, 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 org.testng.annotations.Test;
import java.util.List;
import java.util.function.Consumer;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.testng.Assert.assertEquals;
/*
* THE CONTENTS OF THIS FILE HAVE TO BE IN SYNC WITH THE EXAMPLES USED IN THE JAVADOC.
*
* @test
* @run testng/othervm JavadocExamples
* @summary Checks to ensure example code displayed in the API documentation of
* java/util/Stream compiles correctly.
*/
public class JavadocExamples {
// From mapMulti
@Test
public void testNumberIntegerExample() {
Stream<Number> numbers = Stream.of(1, 2, 3.0);
List<Integer> integers = numbers.<Integer>mapMulti((number, consumer) -> {
if (number instanceof Integer i)
consumer.accept(i);
})
.collect(Collectors.toList());
assertEquals(integers, List.of(1,2));
}
@Test
public void testExpandIterableExample() {
var nestedList = List.of(1, List.of(2, List.of(3, 4)), 5);
Stream<Object> expandedStream = nestedList.stream().mapMulti(C::expandIterable);
assertEquals(expandedStream.toList(), List.of(1,2,3,4,5));
}
static class C {
static void expandIterable(Object e, Consumer<Object> c) {
if (e instanceof Iterable<?> elements) {
for (Object ie : elements) {
expandIterable(ie, c);
}
} else if (e != null) {
c.accept(e);
}
}
}
}
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