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.common.ability.discover;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import java.lang.reflect.Field;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  @ExtendWith(MockitoExtension.class)
  class NacosAbilityManagerHolderTest {
      
      @BeforeEach
      void setUp() throws Exception {
          NacosAbilityManagerHolder.getInstance();
      }
      
      @AfterEach
      void tearDown() throws Exception {
          Field abilityControlManagerField = NacosAbilityManagerHolder.class.getDeclaredField("abstractAbilityControlManager");
          abilityControlManagerField.setAccessible(true);
          abilityControlManagerField.set(null, null);
      }
      
      @Test
      void testGetInstance() {
          assertNotNull(NacosAbilityManagerHolder.getInstance());
      }
      
      @Test
      void testGetInstanceByType() {
          assertNotNull(NacosAbilityManagerHolder.getInstance(HigherMockAbilityManager.class));
      }
      
      @Test
      void testGetInstanceByWrongType() {
          assertThrows(ClassCastException.class, () -> {
              assertNotNull(NacosAbilityManagerHolder.getInstance(LowerMockAbilityManager.class));
          });
      }
  }