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.OpTestCase; 26 27 import java.util.ArrayList; 28 import java.util.DoubleSummaryStatistics; 29 import java.util.IntSummaryStatistics; 30 import java.util.List; 31 import java.util.LongSummaryStatistics; 32 import java.util.stream.Collectors; 33 34 import org.testng.annotations.Test; 35 36 import static org.openjdk.testlib.java.util.stream.LambdaTestHelpers.countTo; 37 38 /** 39 * TestSummaryStatistics 40 * 41 * @author Brian Goetz 42 */ 43 @Test 44 public class SummaryStatisticsTest extends OpTestCase { testIntStatistics()45 public void testIntStatistics() { 46 List<IntSummaryStatistics> instances = new ArrayList<>(); 47 instances.add(countTo(1000).stream().collect(Collectors.summarizingInt(i -> i))); 48 instances.add(countTo(1000).stream().mapToInt(i -> i).summaryStatistics()); 49 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingInt(i -> i))); 50 instances.add(countTo(1000).parallelStream().mapToInt(i -> i).summaryStatistics()); 51 52 for (IntSummaryStatistics stats : instances) { 53 assertEquals(stats.getCount(), 1000); 54 assertEquals(stats.getSum(), countTo(1000).stream().mapToInt(i -> i).sum()); 55 assertEquals(stats.getMax(), 1000); 56 assertEquals(stats.getMin(), 1); 57 } 58 } 59 testLongStatistics()60 public void testLongStatistics() { 61 List<LongSummaryStatistics> instances = new ArrayList<>(); 62 instances.add(countTo(1000).stream().collect(Collectors.summarizingLong(i -> i))); 63 instances.add(countTo(1000).stream().mapToLong(i -> i).summaryStatistics()); 64 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingLong(i -> i))); 65 instances.add(countTo(1000).parallelStream().mapToLong(i -> i).summaryStatistics()); 66 67 for (LongSummaryStatistics stats : instances) { 68 assertEquals(stats.getCount(), 1000); 69 assertEquals(stats.getSum(), (long) countTo(1000).stream().mapToInt(i -> i).sum()); 70 assertEquals(stats.getMax(), 1000L); 71 assertEquals(stats.getMin(), 1L); 72 } 73 } 74 testDoubleStatistics()75 public void testDoubleStatistics() { 76 List<DoubleSummaryStatistics> instances = new ArrayList<>(); 77 instances.add(countTo(1000).stream().collect(Collectors.summarizingDouble(i -> i))); 78 instances.add(countTo(1000).stream().mapToDouble(i -> i).summaryStatistics()); 79 instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingDouble(i -> i))); 80 instances.add(countTo(1000).parallelStream().mapToDouble(i -> i).summaryStatistics()); 81 82 for (DoubleSummaryStatistics stats : instances) { 83 assertEquals(stats.getCount(), 1000); 84 assertEquals(stats.getSum(), (double) countTo(1000).stream().mapToInt(i -> i).sum()); 85 assertEquals(stats.getMax(), 1000.0); 86 assertEquals(stats.getMin(), 1.0); 87 } 88 } 89 } 90