152 lines
4.4 KiB
Java
152 lines
4.4 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @summary Test ServiceLoader with two iterators, interleaving their use
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* to test that they don't interfere with each other
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* @run testng TwoIterators
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*/
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.ServiceLoader;
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import org.testng.annotations.BeforeClass;
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import org.testng.annotations.Test;
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import static org.testng.Assert.*;
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public class TwoIterators {
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// service type
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public static interface S { }
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// service provider implementations
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public static class S1 implements S { }
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public static class S2 implements S { }
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private ClassLoader testClassLoader;
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// creates the services configuration file and sets the ClassLoader
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@BeforeClass
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void setup() throws Exception {
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String classes = System.getProperty("test.classes");
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Path dir = Paths.get(classes, "META-INF", "services");
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Files.createDirectories(dir);
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Path config = dir.resolve(S.class.getName());
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Files.write(config, Arrays.asList(S1.class.getName(), S2.class.getName()));
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this.testClassLoader = TwoIterators.class.getClassLoader();
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}
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@Test
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public void testSequentialUse1() {
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ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader);
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Iterator<S> iterator1 = sl.iterator();
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iterator1.next();
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iterator1.next();
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assertFalse(iterator1.hasNext());
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Iterator<S> iterator2 = sl.iterator();
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iterator2.next();
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iterator2.next();
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assertFalse(iterator2.hasNext());
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}
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@Test
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public void testSequentialUse2() {
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ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader);
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Iterator<S> iterator1 = sl.iterator();
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Iterator<S> iterator2 = sl.iterator();
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iterator1.next();
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iterator1.next();
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assertFalse(iterator1.hasNext());
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iterator2.next();
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iterator2.next();
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assertFalse(iterator2.hasNext());
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}
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@Test
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public void testInterleaved1() {
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ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader);
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Iterator<S> iterator1 = sl.iterator();
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Iterator<S> iterator2 = sl.iterator();
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iterator1.next();
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iterator2.next();
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iterator1.next();
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iterator2.next();
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assertFalse(iterator1.hasNext());
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assertFalse(iterator2.hasNext());
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}
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@Test
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public void testInterleaved2() {
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ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader);
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Iterator<S> iterator1 = sl.iterator();
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iterator1.next();
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Iterator<S> iterator2 = sl.iterator();
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assertTrue(iterator1.hasNext());
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assertTrue(iterator2.hasNext());
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iterator1.next();
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iterator2.next();
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iterator2.next();
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assertFalse(iterator1.hasNext());
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assertFalse(iterator2.hasNext());
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}
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@Test
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public void testInterleaved3() {
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ServiceLoader<S> sl = ServiceLoader.load(S.class, testClassLoader);
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Iterator<S> iterator1 = sl.iterator();
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iterator1.next();
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Iterator<S> iterator2 = sl.iterator();
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assertTrue(iterator2.hasNext());
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assertTrue(iterator1.hasNext());
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iterator2.next();
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iterator2.next();
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iterator1.next();
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assertFalse(iterator1.hasNext());
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assertFalse(iterator2.hasNext());
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}
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}
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