1 /* 2 * Copyright (c) 2012, 2013, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package org.openjdk.tests.java.util.stream; 26 27 import org.testng.annotations.Test; 28 29 import java.util.Arrays; 30 import java.util.Collection; 31 import java.util.Collections; 32 import java.util.function.Function; 33 import java.util.stream.*; 34 35 import static java.util.stream.LambdaTestHelpers.*; 36 37 /** 38 * ExplodeOpTest 39 * 40 * @author Brian Goetz 41 */ 42 @Test 43 public class ExplodeOpTest extends OpTestCase { 44 45 static final Function<Integer, Stream<Integer>> integerRangeMapper 46 = e -> IntStream.range(0, e).boxed(); 47 48 public void testFlatMap() { 49 String[] stringsArray = {"hello", "there", "", "yada"}; 50 Stream<String> strings = Arrays.asList(stringsArray).stream(); 51 assertConcat(strings.flatMap(flattenChars).iterator(), "hellothereyada"); 52 53 assertCountSum(countTo(10).stream().flatMap(mfId), 10, 55); 54 assertCountSum(countTo(10).stream().flatMap(mfNull), 0, 0); 55 assertCountSum(countTo(3).stream().flatMap(mfLt), 6, 4); 56 57 exerciseOps(TestData.Factory.ofArray("stringsArray", stringsArray), s -> s.flatMap(flattenChars)); 58 exerciseOps(TestData.Factory.ofArray("LONG_STRING", new String[] {LONG_STRING}), s -> s.flatMap(flattenChars)); 59 } 60 61 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 62 public void testOps(String name, TestData.OfRef<Integer> data) { 63 Collection<Integer> result = exerciseOps(data, s -> s.flatMap(mfId)); 64 assertEquals(data.size(), result.size()); 65 66 result = exerciseOps(data, s -> s.flatMap(mfNull)); 67 assertEquals(0, result.size()); 68 69 exerciseOps(data, s -> s.flatMap(mfLt)); 70 exerciseOps(data, s -> s.flatMap(integerRangeMapper)); 71 exerciseOps(data, s -> s.flatMap((Integer e) -> IntStream.range(0, e).boxed().limit(10))); 72 } 73 74 // 75 76 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) 77 public void testIntOps(String name, TestData.OfInt data) { 78 Collection<Integer> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToInt(j -> j))); 79 assertEquals(data.size(), result.size()); 80 assertContents(data, result); 81 82 result = exerciseOps(data, s -> s.flatMap(i -> IntStream.empty())); 83 assertEquals(0, result.size()); 84 85 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e))); 86 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e).limit(10))); 87 } 88 89 // 90 91 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) 92 public void testLongOps(String name, TestData.OfLong data) { 93 Collection<Long> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToLong(j -> j))); 94 assertEquals(data.size(), result.size()); 95 assertContents(data, result); 96 97 result = exerciseOps(data, s -> LongStream.empty()); 98 assertEquals(0, result.size()); 99 100 exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e))); 101 exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e).limit(10))); 102 } 103 104 // 105 106 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) 107 public void testDoubleOps(String name, TestData.OfDouble data) { 108 Collection<Double> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToDouble(j -> j))); 109 assertEquals(data.size(), result.size()); 110 assertContents(data, result); 111 112 result = exerciseOps(data, s -> DoubleStream.empty()); 113 assertEquals(0, result.size()); 114 115 exerciseOps(data, s -> s.flatMap(e -> DoubleStream.range(0, e))); 116 exerciseOps(data, s -> s.flatMap(e -> DoubleStream.range(0, e).limit(10))); 117 } 118 }