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 java.util.List; 26 import java.util.stream.LambdaTestHelpers; 27 import java.util.stream.OpTestCase; 28 import java.util.stream.Stream; 29 import java.util.stream.StreamTestDataProvider; 30 import org.testng.annotations.Test; 31 32 import java.util.HashSet; 33 import java.util.Map; 34 import java.util.stream.TestData; 35 36 import static java.util.stream.Collectors.groupingBy; 37 import static java.util.stream.Collectors.reducing; 38 import static java.util.stream.LambdaTestHelpers.*; 39 40 /** 41 * ReduceByOpTest 42 * 43 * @author Brian Goetz 44 */ 45 @Test 46 public class ReduceByOpTest extends OpTestCase { 47 48 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) testOps(String name, TestData.OfRef<Integer> data)49 public void testOps(String name, TestData.OfRef<Integer> data) { 50 Map<Boolean,List<Integer>> gbResult = data.stream().collect(groupingBy(LambdaTestHelpers.forPredicate(pEven, true, false))); 51 Map<Boolean, Integer> result = data.stream().collect(groupingBy(LambdaTestHelpers.forPredicate(pEven, true, false), reducing(0, rPlus))); 52 assertEquals(result.size(), gbResult.size()); 53 for (Map.Entry<Boolean, Integer> entry : result.entrySet()) { 54 setContext("entry", entry); 55 Boolean key = entry.getKey(); 56 assertEquals(entry.getValue(), data.stream().filter(e -> pEven.test(e) == key).reduce(0, rPlus)); 57 } 58 59 int uniqueSize = data.into(new HashSet<Integer>()).size(); 60 Map<Integer, List<Integer>> mgResult = exerciseTerminalOps(data, s -> s.collect(groupingBy(mId))); 61 Map<Integer, Integer> miResult = exerciseTerminalOps(data, s -> s.collect(groupingBy(mId, reducing(0, e -> 1, Integer::sum)))); 62 assertEquals(miResult.keySet().size(), uniqueSize); 63 for (Map.Entry<Integer, Integer> entry : miResult.entrySet()) { 64 setContext("entry", entry); 65 assertEquals((int) entry.getValue(), mgResult.get(entry.getKey()).size()); 66 } 67 } 68 } 69