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.csp.sentinel.cluster.flow.statistic.limit;
  
  import com.alibaba.csp.sentinel.cluster.server.AbstractTimeBasedTest;
  import com.alibaba.csp.sentinel.util.TimeUtil;
  import org.junit.Test;
  import org.mockito.MockedStatic;
  
  import static org.junit.Assert.*;
  
  public class RequestLimiterTest extends AbstractTimeBasedTest {
  
      @Test
      public void testRequestLimiter() {
          try (MockedStatic<TimeUtil> mocked = super.mockTimeUtil()) {
              setCurrentMillis(mocked, System.currentTimeMillis());
              RequestLimiter limiter = new RequestLimiter(10);
              limiter.add(3);
              limiter.add(3);
              limiter.add(3);
              assertTrue(limiter.canPass());
              assertEquals(9, limiter.getSum());
              limiter.add(3);
              assertFalse(limiter.canPass());
  
              // wait a second to refresh the window
              sleep(mocked, 1000);
              limiter.add(3);
              assertTrue(limiter.tryPass());
              assertTrue(limiter.canPass());
              assertEquals(4, limiter.getSum());
          }
      }
  }
  