| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package libcore.java.util; |
| |
| import java.util.Iterator; |
| import java.util.ServiceConfigurationError; |
| import java.util.ServiceLoader; |
| |
| public class ServiceLoaderTest extends junit.framework.TestCase { |
| public static interface UnimplementedInterface { } |
| public void test_noImplementations() { |
| assertFalse(ServiceLoader.load(UnimplementedInterface.class).iterator().hasNext()); |
| } |
| |
| public static class Impl1 implements ServiceLoaderTestInterface { } |
| public static class Impl2 implements ServiceLoaderTestInterface { } |
| public void test_implementations() { |
| ServiceLoader<ServiceLoaderTestInterface> loader = ServiceLoader.load(ServiceLoaderTestInterface.class); |
| Iterator<ServiceLoaderTestInterface> it = loader.iterator(); |
| assertTrue(it.hasNext()); |
| assertTrue(it.next() instanceof Impl1); |
| assertTrue(it.hasNext()); |
| assertTrue(it.next() instanceof Impl2); |
| assertFalse(it.hasNext()); |
| } |
| |
| // Something like "does.not.Exist", that is a well-formed class name, but just doesn't exist. |
| public void test_missingRegisteredClass() throws Exception { |
| try { |
| ServiceLoader.load(ServiceLoaderTestInterfaceMissingClass.class).iterator().next(); |
| fail(); |
| } catch (ServiceConfigurationError expected) { |
| assertTrue(expected.toString(), expected.getCause() instanceof ClassNotFoundException); |
| } |
| } |
| |
| // Something like "java.lang.String", that is a class that exists, |
| // but doesn't implement the interface. |
| public void test_wrongTypeRegisteredClass() throws Exception { |
| try { |
| ServiceLoader.load(ServiceLoaderTestInterfaceWrongType.class).iterator().next(); |
| fail(); |
| } catch (ServiceConfigurationError expected) { |
| assertTrue(expected.toString(), expected.getCause() instanceof ClassCastException); |
| } |
| } |
| |
| // Something like "This is not a class name!" that's just a parse error. |
| public void test_invalidRegisteredClass() throws Exception { |
| try { |
| ServiceLoader.load(ServiceLoaderTestInterfaceParseError.class).iterator().next(); |
| fail(); |
| } catch (ServiceConfigurationError expected) { |
| } |
| } |
| } |