| /* |
| * Copyright (c) 2014, 2015, 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. |
| */ |
| |
| /** |
| * @test |
| * @summary Tests counting of streams |
| * @bug 8031187 8067969 |
| */ |
| |
| package org.openjdk.tests.java.util.stream; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.stream.DoubleStream; |
| import java.util.stream.DoubleStreamTestDataProvider; |
| import java.util.stream.IntStream; |
| import java.util.stream.IntStreamTestDataProvider; |
| import java.util.stream.LongStream; |
| import java.util.stream.LongStreamTestDataProvider; |
| import java.util.stream.OpTestCase; |
| import java.util.stream.Stream; |
| import java.util.stream.StreamTestDataProvider; |
| import java.util.stream.TestData; |
| |
| import org.testng.annotations.Test; |
| |
| public class CountTest extends OpTestCase { |
| |
| @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) |
| public void testOps(String name, TestData.OfRef<Integer> data) { |
| long expectedCount = data.size(); |
| |
| withData(data). |
| terminal(Stream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| |
| // Test with an unknown sized stream |
| withData(data). |
| terminal(s -> s.filter(e -> true), Stream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| } |
| |
| @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class) |
| public void testOps(String name, TestData.OfInt data) { |
| long expectedCount = data.size(); |
| |
| withData(data). |
| terminal(IntStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| |
| withData(data). |
| terminal(s -> s.filter(e -> true), IntStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| } |
| |
| @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class) |
| public void testOps(String name, TestData.OfLong data) { |
| long expectedCount = data.size(); |
| |
| withData(data). |
| terminal(LongStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| |
| withData(data). |
| terminal(s -> s.filter(e -> true), LongStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| } |
| |
| @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class) |
| public void testOps(String name, TestData.OfDouble data) { |
| long expectedCount = data.size(); |
| |
| withData(data). |
| terminal(DoubleStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| |
| withData(data). |
| terminal(s -> s.filter(e -> true), DoubleStream::count). |
| expectedResult(expectedCount). |
| exercise(); |
| } |
| |
| public void testNoEvaluationForSizedStream() { |
| { |
| AtomicInteger ai = new AtomicInteger(); |
| Stream.of(1, 2, 3, 4).peek(e -> ai.getAndIncrement()).count(); |
| assertEquals(ai.get(), 0); |
| } |
| |
| { |
| AtomicInteger ai = new AtomicInteger(); |
| IntStream.of(1, 2, 3, 4).peek(e -> ai.getAndIncrement()).count(); |
| assertEquals(ai.get(), 0); |
| } |
| |
| { |
| AtomicInteger ai = new AtomicInteger(); |
| LongStream.of(1, 2, 3, 4).peek(e -> ai.getAndIncrement()).count(); |
| assertEquals(ai.get(), 0); |
| } |
| |
| { |
| AtomicInteger ai = new AtomicInteger(); |
| DoubleStream.of(1, 2, 3, 4).peek(e -> ai.getAndIncrement()).count(); |
| assertEquals(ai.get(), 0); |
| } |
| } |
| } |