1 /* 2 * Copyright (c) 2012, 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.ArrayList; 26 import java.util.DoubleSummaryStatistics; 27 import java.util.IntSummaryStatistics; 28 import java.util.List; 29 import java.util.LongSummaryStatistics; 30 import java.util.stream.Collectors; 31 import java.util.stream.OpTestCase; 32 33 import org.testng.annotations.Test; 34 35 import static java.util.stream.LambdaTestHelpers.countTo; 36 37 /** 38 * TestSummaryStatistics 39 * 40 * @author Brian Goetz 41 */ 42 @Test 43 public class SummaryStatisticsTest extends OpTestCase { 44 public void testIntStatistics() { 45 List<IntSummaryStatistics> instances = new ArrayList<>(); 46 instances.add(countTo(1000).stream().collect(Collectors.summarizingInt(i -> i))); 47 instances.add(countTo(1000).stream().mapToInt(i -> i).summaryStatistics()); 48 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingInt(i -> i))); 49 instances.add(countTo(1000).parallelStream().mapToInt(i -> i).summaryStatistics()); 50 51 for (IntSummaryStatistics stats : instances) { 52 assertEquals(stats.getCount(), 1000); 53 assertEquals(stats.getSum(), countTo(1000).stream().mapToInt(i -> i).sum()); 54 assertEquals(stats.getMax(), 1000); 55 assertEquals(stats.getMin(), 1); 56 } 57 } 58 59 public void testLongStatistics() { 60 List<LongSummaryStatistics> instances = new ArrayList<>(); 61 instances.add(countTo(1000).stream().collect(Collectors.summarizingLong(i -> i))); 62 instances.add(countTo(1000).stream().mapToLong(i -> i).summaryStatistics()); 63 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingLong(i -> i))); 64 instances.add(countTo(1000).parallelStream().mapToLong(i -> i).summaryStatistics()); 65 66 for (LongSummaryStatistics stats : instances) { 67 assertEquals(stats.getCount(), 1000); 68 assertEquals(stats.getSum(), (long) countTo(1000).stream().mapToInt(i -> i).sum()); 69 assertEquals(stats.getMax(), 1000L); 70 assertEquals(stats.getMin(), 1L); 71 } 72 } 73 74 public void testDoubleStatistics() { 75 List<DoubleSummaryStatistics> instances = new ArrayList<>(); 76 instances.add(countTo(1000).stream().collect(Collectors.summarizingDouble(i -> i))); 77 instances.add(countTo(1000).stream().mapToDouble(i -> i).summaryStatistics()); 78 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingDouble(i -> i))); 79 instances.add(countTo(1000).parallelStream().mapToDouble(i -> i).summaryStatistics()); 80 81 for (DoubleSummaryStatistics stats : instances) { 82 assertEquals(stats.getCount(), 1000); 83 assertEquals(stats.getSum(), (double) countTo(1000).stream().mapToInt(i -> i).sum()); 84 assertEquals(stats.getMax(), 1000.0); 85 assertEquals(stats.getMin(), 1.0); 86 } 87 } 88 }