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 java.util.stream.BaseStream; 34 import java.util.stream.Collectors; 35 import java.util.stream.Stream; 36 import java.util.stream.IntStream; 37 import java.util.stream.LongStream; 38 import java.util.stream.DoubleStream; 39 40 import org.testng.annotations.Test; 41 42 import java.util.Arrays; 43 import java.util.List; 44 import java.util.function.Function; 45 46 @Test 47 public class StreamLinkTest extends OpTestCase { 48 apply(int n, Function<S, S> f)49 private <S> Function<S, S> apply(int n, Function<S, S> f) { 50 return s -> { 51 for (int i = 0; i < n; i++) { 52 s = f.apply(s); 53 } 54 return s; 55 }; 56 } 57 58 private List<Integer> sizes = Arrays.asList(0, 1, 2, 3, 4, 5, 255, 1000); 59 60 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) 61 public void testManyStreams(String name, TestData.OfRef<Integer> data) { 62 for (int n : sizes) { 63 setContext("n", n); 64 List<Integer> expected = data.stream().map(e -> (Integer) (e + n)).collect(Collectors.toList()); 65 66 withData(data). 67 stream(apply(n, (Stream<Integer> s) -> s.map(e -> (Integer) (e + 1)))). 68 expectedResult(expected). 69 exercise(); 70 } 71 } 72 73 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) testIntManyStreams(String name, TestData.OfInt data)74 public void testIntManyStreams(String name, TestData.OfInt data) { 75 for (int n : sizes) { 76 setContext("n", n); 77 int[] expected = data.stream().map(e -> e + n).toArray(); 78 79 withData(data). 80 stream(apply(n, (IntStream s) -> s.map(e -> e + 1))). 81 expectedResult(expected). 82 exercise(); 83 } 84 } 85 86 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) testLongManyStreams(String name, TestData.OfLong data)87 public void testLongManyStreams(String name, TestData.OfLong data) { 88 for (int n : sizes) { 89 setContext("n", n); 90 long[] expected = data.stream().map(e -> e + n).toArray(); 91 92 withData(data). 93 stream(apply(n, (LongStream s) -> s.map(e -> e + 1L))). 94 expectedResult(expected). 95 exercise(); 96 } 97 } 98 99 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) testDoubleManyStreams(String name, TestData.OfDouble data)100 public void testDoubleManyStreams(String name, TestData.OfDouble data) { 101 for (int n : sizes) { 102 setContext("n", n); 103 double[] expected = data.stream().map(e -> accumulate(e, n)).toArray(); 104 105 withData(data). 106 stream(apply(n, (DoubleStream s) -> s.map(e -> e + 1.0))). 107 expectedResult(expected). 108 exercise(); 109 } 110 } accumulate(double e, int n)111 private double accumulate(double e, int n) { 112 while (n-- > 0) { 113 e = e + 1.0; 114 } 115 return e; 116 } 117 } 118