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. 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 package org.openjdk.tests.java.util.stream; 24 25 import org.openjdk.testlib.java.util.stream.DoubleStreamTestDataProvider; 26 import org.openjdk.testlib.java.util.stream.IntStreamTestDataProvider; 27 import org.openjdk.testlib.java.util.stream.LambdaTestHelpers; 28 import org.openjdk.testlib.java.util.stream.LongStreamTestDataProvider; 29 import org.openjdk.testlib.java.util.stream.OpTestCase; 30 import org.openjdk.testlib.java.util.stream.StreamTestDataProvider; 31 import org.openjdk.testlib.java.util.stream.TestData; 32 33 import org.testng.annotations.Test; 34 35 import java.util.Arrays; 36 import java.util.Collection; 37 import java.util.Collections; 38 import java.util.function.Function; 39 import java.util.stream.BaseStream; 40 import java.util.stream.Stream; 41 import java.util.stream.IntStream; 42 import java.util.stream.LongStream; 43 import java.util.stream.DoubleStream; 44 45 import static org.openjdk.testlib.java.util.stream.LambdaTestHelpers.*; 46 47 /** 48 * ExplodeOpTest 49 * 50 * @author Brian Goetz 51 */ 52 @Test 53 public class ExplodeOpTest extends OpTestCase { 54 55 static final Function<Integer, Stream<Integer>> integerRangeMapper 56 = e -> IntStream.range(0, e).boxed(); 57 testFlatMap()58 public void testFlatMap() { 59 String[] stringsArray = {"hello", "there", "", "yada"}; 60 Stream<String> strings = Arrays.asList(stringsArray).stream(); 61 assertConcat(strings.flatMap(flattenChars).iterator(), "hellothereyada"); 62 63 assertCountSum(countTo(10).stream().flatMap(mfId), 10, 55); 64 assertCountSum(countTo(10).stream().flatMap(mfNull), 0, 0); 65 assertCountSum(countTo(3).stream().flatMap(mfLt), 6, 4); 66 67 exerciseOps(TestData.Factory.ofArray("stringsArray", stringsArray), s -> s.flatMap(flattenChars)); 68 exerciseOps(TestData.Factory.ofArray("LONG_STRING", new String[] {LONG_STRING}), s -> s.flatMap(flattenChars)); 69 } 70 71 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) testOps(String name, TestData.OfRef<Integer> data)72 public void testOps(String name, TestData.OfRef<Integer> data) { 73 Collection<Integer> result = exerciseOps(data, s -> s.flatMap(mfId)); 74 assertEquals(data.size(), result.size()); 75 76 result = exerciseOps(data, s -> s.flatMap(mfNull)); 77 assertEquals(0, result.size()); 78 79 result = exerciseOps(data, s-> s.flatMap(e -> Stream.empty())); 80 assertEquals(0, result.size()); 81 82 exerciseOps(data, s -> s.flatMap(mfLt)); 83 exerciseOps(data, s -> s.flatMap(integerRangeMapper)); 84 exerciseOps(data, s -> s.flatMap((Integer e) -> IntStream.range(0, e).boxed().limit(10))); 85 } 86 87 // 88 89 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) testIntOps(String name, TestData.OfInt data)90 public void testIntOps(String name, TestData.OfInt data) { 91 Collection<Integer> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToInt(j -> j))); 92 assertEquals(data.size(), result.size()); 93 assertContents(data, result); 94 95 result = exerciseOps(data, s -> s.flatMap(i -> IntStream.empty())); 96 assertEquals(0, result.size()); 97 98 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e))); 99 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e).limit(10))); 100 } 101 102 // 103 104 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) testLongOps(String name, TestData.OfLong data)105 public void testLongOps(String name, TestData.OfLong data) { 106 Collection<Long> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToLong(j -> j))); 107 assertEquals(data.size(), result.size()); 108 assertContents(data, result); 109 110 result = exerciseOps(data, s -> LongStream.empty()); 111 assertEquals(0, result.size()); 112 113 exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e))); 114 exerciseOps(data, s -> s.flatMap(e -> LongStream.range(0, e).limit(10))); 115 } 116 117 // 118 119 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) testDoubleOps(String name, TestData.OfDouble data)120 public void testDoubleOps(String name, TestData.OfDouble data) { 121 Collection<Double> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToDouble(j -> j))); 122 assertEquals(data.size(), result.size()); 123 assertContents(data, result); 124 125 result = exerciseOps(data, s -> DoubleStream.empty()); 126 assertEquals(0, result.size()); 127 128 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).asDoubleStream())); 129 exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, (int) e).limit(10).asDoubleStream())); 130 } 131 } 132