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Java example source code file (FindFirstOpTest.java)
The FindFirstOpTest.java Java example source code/* * 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.*; import java.util.stream.*; import org.testng.annotations.Test; import java.util.function.Function; import static java.util.stream.LambdaTestHelpers.*; /** * FindFirstOpTest */ @Test public class FindFirstOpTest extends OpTestCase { public void testFindFirst() { assertFalse(Collections.emptySet().stream().findFirst().isPresent(), "no result"); assertFalse(countTo(10).stream().filter(x -> x > 10).findFirst().isPresent(), "no result"); exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(pEven).findFirst().get()}).stream(), Arrays.asList(2)); exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.findFirst().get()}).stream(), Arrays.asList(1)); exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 499).findFirst().get()}).stream(), Arrays.asList(499)); exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 999).findFirst().get()}).stream(), Arrays.asList(999)); exerciseOps(countTo(0), s -> Arrays.asList(new Integer[]{s.findFirst().orElse(-1)}).stream(), Arrays.asList(-1)); exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 1499).findFirst().orElse(-1)}).stream(), Arrays.asList(-1)); } @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class) public void testStream(String name, TestData.OfRef<Integer> data) { exerciseStream(data, s -> s); exerciseStream(data, s -> s.filter(pTrue)); exerciseStream(data, s -> s.filter(pFalse)); exerciseStream(data, s -> s.filter(pEven)); } void exerciseStream(TestData.OfRef<Integer> data, Function Other Java examples (source code examples)Here is a short list of links related to this Java FindFirstOpTest.java source code file: |
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