| /* |
| * Copyright 2015, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package io.grpc; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertSame; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| import java.util.ServiceConfigurationError; |
| |
| /** Unit tests for {@link ManagedChannelProvider}. */ |
| @RunWith(JUnit4.class) |
| public class ManagedChannelProviderTest { |
| private final String serviceFile = "META-INF/services/io.grpc.ManagedChannelProvider"; |
| |
| @Test(expected = ManagedChannelProvider.ProviderNotFoundException.class) |
| public void noProvider() { |
| ManagedChannelProvider.provider(); |
| } |
| |
| @Test |
| public void multipleProvider() { |
| ClassLoader cl = new ReplacingClassLoader(getClass().getClassLoader(), serviceFile, |
| "io/grpc/ManagedChannelProviderTest-multipleProvider.txt"); |
| assertSame(Available7Provider.class, ManagedChannelProvider.load(cl).getClass()); |
| } |
| |
| @Test |
| public void unavailableProvider() { |
| ClassLoader cl = new ReplacingClassLoader(getClass().getClassLoader(), serviceFile, |
| "io/grpc/ManagedChannelProviderTest-unavailableProvider.txt"); |
| assertNull(ManagedChannelProvider.load(cl)); |
| } |
| |
| @Test |
| public void getCandidatesViaHardCoded_usesProvidedClassLoader() { |
| final RuntimeException toThrow = new RuntimeException(); |
| try { |
| ManagedChannelProvider.getCandidatesViaHardCoded(new ClassLoader() { |
| @Override |
| public Class<?> loadClass(String name) { |
| throw toThrow; |
| } |
| }); |
| fail("Expected exception"); |
| } catch (RuntimeException ex) { |
| assertSame(toThrow, ex); |
| } |
| } |
| |
| @Test |
| public void getCandidatesViaHardCoded_ignoresMissingClasses() { |
| Iterable<ManagedChannelProvider> i = |
| ManagedChannelProvider.getCandidatesViaHardCoded(new ClassLoader() { |
| @Override |
| public Class<?> loadClass(String name) throws ClassNotFoundException { |
| throw new ClassNotFoundException(); |
| } |
| }); |
| assertFalse("Iterator should be empty", i.iterator().hasNext()); |
| } |
| |
| @Test |
| public void create_throwsErrorOnMisconfiguration() throws Exception { |
| class PrivateClass {} |
| |
| try { |
| ManagedChannelProvider.create(PrivateClass.class); |
| fail("Expected exception"); |
| } catch (ServiceConfigurationError e) { |
| assertTrue("Expected ClassCastException cause: " + e.getCause(), |
| e.getCause() instanceof ClassCastException); |
| } |
| } |
| |
| private static class BaseProvider extends ManagedChannelProvider { |
| private final boolean isAvailable; |
| private final int priority; |
| |
| public BaseProvider(boolean isAvailable, int priority) { |
| this.isAvailable = isAvailable; |
| this.priority = priority; |
| } |
| |
| @Override |
| protected boolean isAvailable() { |
| return isAvailable; |
| } |
| |
| @Override |
| protected int priority() { |
| return priority; |
| } |
| |
| @Override |
| protected ManagedChannelBuilder<?> builderForAddress(String host, int port) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected ManagedChannelBuilder<?> builderForTarget(String target) { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| public static class Available0Provider extends BaseProvider { |
| public Available0Provider() { |
| super(true, 0); |
| } |
| } |
| |
| public static class Available5Provider extends BaseProvider { |
| public Available5Provider() { |
| super(true, 5); |
| } |
| } |
| |
| public static class Available7Provider extends BaseProvider { |
| public Available7Provider() { |
| super(true, 7); |
| } |
| } |
| |
| public static class UnavailableProvider extends BaseProvider { |
| public UnavailableProvider() { |
| super(false, 10); |
| } |
| |
| @Override |
| protected int priority() { |
| throw new RuntimeException("purposefully broken"); |
| } |
| } |
| } |