| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.openjdk.tests.java.util.stream; |
| |
| import java.util.stream.IntStream; |
| import java.util.stream.IntStreamTestDataProvider; |
| import java.util.stream.OpTestCase; |
| import org.testng.annotations.Test; |
| |
| import java.util.Arrays; |
| import java.util.OptionalInt; |
| import java.util.stream.TestData; |
| |
| import static java.util.stream.LambdaTestHelpers.*; |
| |
| public class IntReduceTest extends OpTestCase { |
| public void testReduce() { |
| int[] a = IntStream.range(1, 11).toArray(); |
| |
| assertEquals(55, Arrays.stream(a).reduce(irPlus).getAsInt()); |
| assertEquals(55, Arrays.stream(a).reduce(0, irPlus)); |
| assertEquals(10, Arrays.stream(a).reduce(irMax).getAsInt()); |
| assertEquals(1, Arrays.stream(a).reduce(irMin).getAsInt()); |
| |
| assertEquals(0, IntStream.empty().reduce(0, irPlus)); |
| assertFalse(IntStream.empty().reduce(irPlus).isPresent()); |
| |
| assertEquals(110, Arrays.stream(a).map(irDoubler).reduce(irPlus).getAsInt()); |
| assertEquals(20, Arrays.stream(a).map(irDoubler).reduce(irMax).getAsInt()); |
| assertEquals(2, Arrays.stream(a).map(irDoubler).reduce(irMin).getAsInt()); |
| } |
| |
| @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) |
| public void testOps(String name, TestData.OfInt data) { |
| assertEquals(0, (int) exerciseTerminalOps(data, s -> s.filter(ipFalse), s -> s.reduce(0, irPlus))); |
| |
| OptionalInt seedless = exerciseTerminalOps(data, s -> s.reduce(irPlus)); |
| int folded = exerciseTerminalOps(data, s -> s.reduce(0, irPlus)); |
| assertEquals(folded, seedless.orElse(0)); |
| |
| seedless = exerciseTerminalOps(data, s -> s.reduce(irMin)); |
| folded = exerciseTerminalOps(data, s -> s.reduce(Integer.MAX_VALUE, irMin)); |
| assertEquals(folded, seedless.orElse(Integer.MAX_VALUE)); |
| |
| seedless = exerciseTerminalOps(data, s -> s.reduce(irMax)); |
| folded = exerciseTerminalOps(data, s -> s.reduce(Integer.MIN_VALUE, irMax)); |
| assertEquals(folded, seedless.orElse(Integer.MIN_VALUE)); |
| |
| seedless = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(irPlus)); |
| folded = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(0, irPlus)); |
| assertEquals(folded, seedless.orElse(0)); |
| |
| seedless = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(irMin)); |
| folded = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(Integer.MAX_VALUE, irMin)); |
| assertEquals(folded, seedless.orElse(Integer.MAX_VALUE)); |
| |
| seedless = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(irMax)); |
| folded = exerciseTerminalOps(data, s -> s.map(irDoubler), s -> s.reduce(Integer.MIN_VALUE, irMax)); |
| assertEquals(folded, seedless.orElse(Integer.MIN_VALUE)); |
| } |
| } |