91 lines
3.2 KiB
Java
91 lines
3.2 KiB
Java
/*
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* Copyright (c) 2016, 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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import java.io.IOException;
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import java.io.UncheckedIOException;
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import java.net.URL;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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/*
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* @test
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* @bug 8161230
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* @summary Test java.lang.ClassLoader.resources() method
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*
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* @build ResourcesStreamTest
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* @run main ResourcesStreamTest
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*/
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public class ResourcesStreamTest {
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public static void main(String[] args) throws Exception {
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testSuccess();
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testFailure();
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}
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public static void testSuccess() throws Exception {
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// failing part first
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try {
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ClassLoader cl = new FailingClassLoader();
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// should create the stream pipe
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Stream<URL> stream = cl.resources("the name");
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// expect function to throw an exception when calling the method
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stream.forEach(System.out::println);
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throw new Exception("expected UncheckedIOException not thrown");
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} catch (UncheckedIOException uio) {
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String causeMessage = uio.getCause().getMessage();
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if (!"the name".equals(causeMessage))
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throw new Exception("unexpected cause message: " + causeMessage);
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}
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}
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public static void testFailure() throws Exception {
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ClassLoader cl = new SuccessClassLoader();
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long count = cl.resources("the name").count();
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if (count != 1)
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throw new Exception("expected resource is null or empty");
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cl.resources("the name")
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.filter(url -> "file:/somefile".equals(url.toExternalForm()))
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.findFirst()
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.orElseThrow(() -> new Exception("correct URL not found"));
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}
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public static class SuccessClassLoader extends ClassLoader {
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@Override
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public Enumeration<URL> getResources(String name) throws IOException {
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URL url = new URL("file:/somefile");
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return Collections.enumeration(Collections.singleton(url));
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}
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}
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public static class FailingClassLoader extends ClassLoader {
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@Override
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public Enumeration<URL> getResources(String name) throws IOException {
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throw new IOException(name);
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}
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}
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}
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