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/*
* Copyright (c) 2012, 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 flat-map operations
* @bug 8044047 8076458
*/
package org.openjdk.tests.java.util.stream;
import org.testng.annotations.Test;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.function.Function;
import java.util.stream.*;
import static java.util.stream.LambdaTestHelpers.*;
import static java.util.stream.ThowableHelper.checkNPE;
@Test
public class FlatMapOpTest extends OpTestCase {
public void testNullMapper() {
checkNPE(() -> Stream.of(1).flatMap(null));
checkNPE(() -> IntStream.of(1).flatMap(null));
checkNPE(() -> LongStream.of(1).flatMap(null));
checkNPE(() -> DoubleStream.of(1).flatMap(null));
}
static final Function<Integer, Stream<Integer>> integerRangeMapper
= e -> IntStream.range(0, e).boxed();
public void testFlatMap() {
String[] stringsArray = {"hello", "there", "", "yada"};
Stream<String> strings = Arrays.asList(stringsArray).stream();
assertConcat(strings.flatMap(flattenChars).iterator(), "hellothereyada");
assertCountSum(countTo(10).stream().flatMap(mfId), 10, 55);
assertCountSum(countTo(10).stream().flatMap(mfNull), 0, 0);
assertCountSum(countTo(3).stream().flatMap(mfLt), 6, 4);
exerciseOps(TestData.Factory.ofArray("stringsArray", stringsArray), s -> s.flatMap(flattenChars));
exerciseOps(TestData.Factory.ofArray("LONG_STRING", new String[] {LONG_STRING}), s -> s.flatMap(flattenChars));
}
@Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class)
public void testOps(String name, TestData.OfRef<Integer> data) {
Collection<Integer> result = exerciseOps(data, s -> s.flatMap(mfId));
assertEquals(data.size(), result.size());
result = exerciseOps(data, s -> s.flatMap(mfNull));
assertEquals(0, result.size());
result = exerciseOps(data, s-> s.flatMap(e -> Stream.empty()));
assertEquals(0, result.size());
}
@Test(dataProvider = "StreamTestData<Integer>.small", dataProviderClass = StreamTestDataProvider.class)
public void testOpsX(String name, TestData.OfRef<Integer> data) {
exerciseOps(data, s -> s.flatMap(mfLt));
exerciseOps(data, s -> s.flatMap(integerRangeMapper));
exerciseOps(data, s -> s.flatMap((Integer e) -> IntStream.range(0, e).boxed().limit(10)));
}
//
@Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class)
public void testIntOps(String name, TestData.OfInt data) {
Collection<Integer> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToInt(j -> j)));
assertEquals(data.size(), result.size());
assertContents(data, result);
result = exerciseOps(data, s -> s.flatMap(i -> IntStream.empty()));
assertEquals(0, result.size());
}
@Test(dataProvider = "IntStreamTestData.small", dataProviderClass = IntStreamTestDataProvider.class)
public void testIntOpsX(String name, TestData.OfInt data) {
exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e)));
exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e).limit(10)));
}
//
@Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class)
public void testLongOps(String name, TestData.OfLong data) {
Collection<Long> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToLong(j -> j)));
assertEquals(data.size(), result.size());
assertContents(data, result);
result = exerciseOps(data, s -> LongStream.empty());
assertEquals(0, result.size());
}
@Test(dataProvider = "LongStreamTestData.small", dataProviderClass = LongStreamTestDataProvider.class)
public void testLongOpsX(String name, TestData.OfLong data) {
exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e)));
exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e).limit(10)));
}
//
@Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class)
public void testDoubleOps(String name, TestData.OfDouble data) {
Collection<Double> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToDouble(j -> j)));
assertEquals(data.size(), result.size());
assertContents(data, result);
result = exerciseOps(data, s -> DoubleStream.empty());
assertEquals(0, result.size());
}
@Test(dataProvider = "DoubleStreamTestData.small", dataProviderClass = DoubleStreamTestDataProvider.class)
public void testDoubleOpsX(String name, TestData.OfDouble data) {
exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).asDoubleStream()));
exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).limit(10).asDoubleStream()));
}
}
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