--- /dev/null 2016-09-07 17:51:06.776524621 +0000 +++ new/test/java/lang/ClassLoader/ResourcesStreamTest.java 2016-09-07 21:36:12.020255334 +0000 @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2016, 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. + */ + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.net.URL; +import java.util.Collections; +import java.util.Enumeration; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +/* + * @test + * @bug 8161230 + * @summary Test java.lang.ClassLoader.resources() method + * + * @build ResourcesStreamTest + * @run main ResourcesStreamTest + */ +public class ResourcesStreamTest { + + public static void main(String[] args) throws Exception { + testSuccess(); + testFailure(); + } + + public static void testSuccess() throws Exception { + // failing part first + try { + ClassLoader cl = new FailingClassLoader(); + // should create the stream pipe + Stream stream = cl.resources("the name"); + // expect function to throw an exception when calling the method + stream.forEach(System.out::println); + throw new Exception("expected UncheckedIOException not thrown"); + } catch (UncheckedIOException uio) { + String causeMessage = uio.getCause().getMessage(); + if (!"the name".equals(causeMessage)) + throw new Exception("unexpected cause message: " + causeMessage); + } + } + + public static void testFailure() throws Exception { + ClassLoader cl = new SuccessClassLoader(); + long count = cl.resources("the name").count(); + if (count != 1) + throw new Exception("expected resource is null or empty"); + + cl.resources("the name") + .filter(url -> "file:/somefile".equals(url.toExternalForm())) + .findFirst() + .orElseThrow(() -> new Exception("correct URL not found")); + } + + public static class SuccessClassLoader extends ClassLoader { + @Override + public Enumeration getResources(String name) throws IOException { + URL url = new URL("file:/somefile"); + return Collections.enumeration(Collections.singleton(url)); + } + } + + public static class FailingClassLoader extends ClassLoader { + @Override + public Enumeration getResources(String name) throws IOException { + throw new IOException(name); + } + } +}