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.core.distributed.id;
  
  import com.alibaba.nacos.sys.env.EnvUtil;
  import org.junit.jupiter.api.Test;
  import org.springframework.core.env.StandardEnvironment;
  
  import java.util.stream.IntStream;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  class SnowFlowerInstanceIdGeneratorTest {
      
      @Test
      void nextId() {
          
          EnvUtil.setEnvironment(new StandardEnvironment());
          SnowFlowerIdGenerator generator = new SnowFlowerIdGenerator();
          generator.initialize(1);
          
          long count = IntStream.range(0, 10).mapToObj(i -> generator.nextId()).distinct().count();
          
          assertEquals(10, count);
      }
  }