content: /*
   * Copyright 1999-2023 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.auth.serveridentity;
  
  import com.alibaba.nacos.auth.annotation.Secured;
  import com.alibaba.nacos.auth.config.NacosAuthConfig;
  import com.alibaba.nacos.common.spi.NacosServiceLoader;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.springframework.test.util.ReflectionTestUtils;
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.InvocationTargetException;
  import java.util.Collection;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  
  class ServerIdentityCheckerHolderTest {
      
      Map<Class<?>, Collection<Class<?>>> servicesMap;
      
      private Class<? extends ServerIdentityChecker> cachedCheckerClass;
      
      @BeforeEach
      void setUp() {
          servicesMap = (Map<Class<?>, Collection<Class<?>>>) ReflectionTestUtils.getField(NacosServiceLoader.class,
                  "SERVICES");
          cachedCheckerClass = (Class<? extends ServerIdentityChecker>) ReflectionTestUtils.getField(
                  ServerIdentityCheckerHolder.getInstance(), "checkerClass");
      }
      
      @AfterEach
      void tearDown() {
          servicesMap.remove(ServerIdentityChecker.class);
          ReflectionTestUtils.setField(ServerIdentityCheckerHolder.getInstance(), "checkerClass", cachedCheckerClass);
      }
      
      @Test
      void testConstructorWithSingleImplementation()
              throws InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
          ServerIdentityCheckerHolder holder = getNewHolder(1);
          assertInstanceOf(MockChecker.class, holder.newChecker());
      }
      
      @Test
      void testConstructorWithMultipleImplementation()
              throws InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
          ServerIdentityCheckerHolder holder = getNewHolder(2);
          assertInstanceOf(MockChecker.class, holder.newChecker());
      }
      
      ServerIdentityCheckerHolder getNewHolder(int size)
              throws NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
          List<Class<?>> classes = new LinkedList<>();
          for (int i = 0; i < size; i++) {
              classes.add(MockChecker.class);
          }
          servicesMap.put(ServerIdentityChecker.class, classes);
          Constructor<ServerIdentityCheckerHolder> constructor = ServerIdentityCheckerHolder.class.getDeclaredConstructor();
          constructor.setAccessible(true);
          return constructor.newInstance();
      }
      
      public static class MockChecker implements ServerIdentityChecker {
          
          @Override
          public void init(NacosAuthConfig authConfig) {
          }
          
          @Override
          public ServerIdentityResult check(ServerIdentity serverIdentity, Secured secured) {
              return ServerIdentityResult.success();
          }
      }
  }