content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.common.spi;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Collection;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  
  class NacosServiceLoaderTest {
      
      @AfterEach
      void tearDown() {
          SpiTestImpl.newInstanceException = false;
      }
      
      @Test
      void testLoad() {
          Collection<SpiTestInterface> actual = NacosServiceLoader.load(SpiTestInterface.class);
          assertEquals(1, actual.size());
          assertEquals(SpiTestImpl.class, actual.iterator().next().getClass());
      }
      
      @Test
      void newServiceInstances() {
          SpiTestInterface loadInstance = NacosServiceLoader.load(SpiTestInterface.class).iterator().next();
          Collection<SpiTestInterface> actual = NacosServiceLoader.newServiceInstances(SpiTestInterface.class);
          assertEquals(1, actual.size());
          assertEquals(SpiTestImpl.class, actual.iterator().next().getClass());
          assertNotEquals(loadInstance, actual.iterator().next());
      }
      
      @Test
      void newServiceInstancesWithException() {
          NacosServiceLoader.load(SpiTestInterface.class);
          SpiTestImpl.newInstanceException = true;
          try {
              NacosServiceLoader.newServiceInstances(SpiTestInterface.class);
          } catch (ServiceLoaderException e) {
              assertEquals(SpiTestImpl.class, e.getClazz());
              assertEquals("Can not load class `" + SpiTestImpl.class.getName() + "` by SPI ", e.getMessage());
          }
      }
  }
  