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.client.config.utils;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class JvmUtilTest {
      
      Method initMethod;
      
      @BeforeEach
      void setUp() throws NoSuchMethodException {
          initMethod = JvmUtil.class.getDeclaredMethod("init");
          initMethod.setAccessible(true);
      }
      
      @AfterEach
      void tearDown() throws NoSuchFieldException, IllegalAccessException {
          System.clearProperty("isMultiInstance");
          Field field = JvmUtil.class.getDeclaredField("isMultiInstance");
          field.setAccessible(true);
          field.set(JvmUtil.class, false);
      }
      
      @Test
      void testIsMultiInstance() throws InvocationTargetException, IllegalAccessException {
          initMethod.invoke(JvmUtil.class);
          Boolean multiInstance = JvmUtil.isMultiInstance();
          assertFalse(multiInstance);
      }
      
      @Test
      void testIsMultiInstance2() throws InvocationTargetException, IllegalAccessException {
          System.setProperty("isMultiInstance", "true");
          initMethod.invoke(JvmUtil.class);
          Boolean multiInstance = JvmUtil.isMultiInstance();
          assertTrue(multiInstance);
      }
  }