/*
    * 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.apache.maven.surefire.spi;
  
  import java.io.IOException;
  
  import org.apache.maven.surefire.providerapi.ServiceLoader;
  import org.junit.Test;
  
  import static java.lang.Thread.currentThread;
  import static org.assertj.core.api.Assertions.assertThat;
  
  /**
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.20
   */
  public class SPITest {
      private final ServiceLoader spi = new ServiceLoader();
      private final ClassLoader ctx = currentThread().getContextClassLoader();
  
      @Test
      public void shouldNotLoadSpiDoesNotExist() throws IOException {
          assertThat(spi.lookup(NoServiceInterface.class, ctx)).isEmpty();
  
          assertThat(spi.load(NoServiceInterface.class, ctx)).isEmpty();
      }
  
      @Test
      public void shouldNotLoadEmptySpi() throws IOException {
          assertThat(spi.lookup(EmptyServiceInterface.class, ctx)).isEmpty();
  
          assertThat(spi.load(EmptyServiceInterface.class, ctx)).isEmpty();
      }
  
      @Test
      public void shouldLoad2SpiObjects() throws IOException {
          assertThat(spi.lookup(ExistingServiceInterface.class, ctx)).hasSize(2);
  
          assertThat(spi.lookup(ExistingServiceInterface.class, ctx))
                  .containsOnly(SPImpl1.class.getName(), SPImpl2.class.getName());
  
          assertThat(spi.load(ExistingServiceInterface.class, ctx)).hasSize(2);
  
          assertThat(spi.load(ExistingServiceInterface.class, ctx)).contains(new SPImpl1(), new SPImpl2());
      }
  }