content: /*
   * Copyright 1999-2022 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.sys.utils;
  
  import org.junit.jupiter.api.Test;
  
  import java.lang.reflect.Method;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  
  class MethodUtilTest {
      
      private static final Method DOUBLE_METHOD;
      
      private static final Method LONG_METHOD;
      
      static {
          try {
              DOUBLE_METHOD = InternalMethod.class.getMethod("getD");
              LONG_METHOD = InternalMethod.class.getMethod("getL");
          } catch (NoSuchMethodException e) {
              throw new RuntimeException(e);
          }
      }
      
      @Test
      void invokeAndReturnDouble() {
          InternalMethod internalMethod = new InternalMethod();
          assertNotEquals(Double.NaN, MethodUtil.invokeAndReturnDouble(DOUBLE_METHOD, internalMethod), 0.000001d);
          
          assertEquals(Double.NaN, MethodUtil.invokeAndReturnDouble(LONG_METHOD, internalMethod), 0.000001d);
      }
      
      @Test
      void invokeAndReturnLong() {
          InternalMethod internalMethod = new InternalMethod();
          assertEquals(100L, MethodUtil.invokeAndReturnLong(LONG_METHOD, internalMethod));
          assertNotEquals(100L, MethodUtil.invokeAndReturnLong(DOUBLE_METHOD, internalMethod));
      }
      
      public static class InternalMethod {
          
          private double d = 1.1d;
          
          private long l = 100L;
          
          public double getD() {
              return d;
          }
          
          public long getL() {
              return l;
          }
      }
  }
  