/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.eclipse.aether.impl;

import java.util.Arrays;
import java.util.List;

import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.spi.locator.Service;
import org.eclipse.aether.spi.locator.ServiceLocator;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;

/**
 */
public class DefaultServiceLocatorTest {

    @Test
    public void testGetRepositorySystem() {
        DefaultServiceLocator locator = new DefaultServiceLocator();
        locator.addService(ArtifactDescriptorReader.class, StubArtifactDescriptorReader.class);
        locator.addService(VersionResolver.class, StubVersionResolver.class);
        locator.addService(VersionRangeResolver.class, StubVersionRangeResolver.class);

        RepositorySystem repoSys = locator.getService(RepositorySystem.class);
        assertNotNull(repoSys);
    }

    @Test
    public void testGetServicesUnmodifiable() {
        DefaultServiceLocator locator = new DefaultServiceLocator();
        locator.setServices(String.class, "one", "two");
        List<String> services = locator.getServices(String.class);
        assertNotNull(services);
        try {
            services.set(0, "fail");
            fail("service list is modifable");
        } catch (UnsupportedOperationException e) {
            // expected
        }
    }

    @Test
    public void testSetInstancesAddClass() {
        DefaultServiceLocator locator = new DefaultServiceLocator();
        locator.setServices(String.class, "one", "two");
        locator.addService(String.class, String.class);
        assertEquals(Arrays.asList("one", "two", ""), locator.getServices(String.class));
    }

    @Test
    public void testInitService() {
        DefaultServiceLocator locator = new DefaultServiceLocator();
        locator.setService(DummyService.class, DummyService.class);
        DummyService service = locator.getService(DummyService.class);
        assertNotNull(service);
        assertNotNull(service.locator);
    }

    private static class DummyService implements Service {

        ServiceLocator locator;

        public void initService(ServiceLocator locator) {
            this.locator = locator;
        }
    }
}
