1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @summary flat-map operations 27 * @bug 8044047 8076458 28 */ 29 30 package org.openjdk.tests.java.util.stream; 31 32 import org.testng.annotations.Test; 33 34 import java.util.Collection; 35 import java.util.Collections; 36 import java.util.concurrent.atomic.AtomicInteger; 37 import java.util.stream.DoubleStream; 38 import java.util.stream.DoubleStreamTestDataProvider; 39 import java.util.stream.IntStream; 40 import java.util.stream.OpTestCase; 41 import java.util.stream.TestData; 42 43 import static java.util.stream.LambdaTestHelpers.*; 44 import static java.util.stream.ThowableHelper.checkNPE; 45 46 @Test 47 public class FlatMapDoubleOpTest extends OpTestCase { 48 49 @Test 50 public void testDoubleClose() { 51 AtomicInteger before = new AtomicInteger(); 52 AtomicInteger onClose = new AtomicInteger(); 53 54 DoubleStream.of(1, 2).peek(e -> before.getAndIncrement()). 55 flatMap(i -> DoubleStream.of(i, i).onClose(onClose::getAndIncrement)).count(); 56 assertEquals(before.get(), onClose.get()); 57 } 58 59 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 60 public void testDoubleOps(String name, TestData.OfDouble data) { 61 Collection<Double> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToDouble(j -> j))); 62 assertEquals(data.size(), result.size()); 63 assertContents(data, result); 64 65 result = exerciseOps(data, s -> DoubleStream.empty()); 66 assertEquals(0, result.size()); 67 68 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).asDoubleStream())); 69 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).limit(10).asDoubleStream())); 70 } 71 }