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.slots.statistic.base;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  import com.alibaba.csp.sentinel.util.TimeUtil;
  import org.junit.Test;
  
  import com.alibaba.csp.sentinel.test.AbstractTimeBasedTest;
  import org.mockito.MockedStatic;
  
  import static org.junit.Assert.*;
  
  /**
   * @author Eric Zhao
   */
  public class LeapArrayTest extends AbstractTimeBasedTest {
      
      @Test
      public void testGetValidHead() {
          try (MockedStatic<TimeUtil> mocked = super.mockTimeUtil()) {
              int windowLengthInMs = 100;
              int intervalInMs = 1000;
              int sampleCount = intervalInMs / windowLengthInMs;
              LeapArray<AtomicInteger> leapArray = new LeapArray<AtomicInteger>(sampleCount, intervalInMs) {
                  @Override
                  public AtomicInteger newEmptyBucket(long time) {
                      return new AtomicInteger(0);
                  }
  
                  @Override
                  protected WindowWrap<AtomicInteger> resetWindowTo(WindowWrap<AtomicInteger> windowWrap, long startTime) {
                      windowWrap.resetTo(startTime);
                      windowWrap.value().set(0);
                      return windowWrap;
                  }
              };
  
              WindowWrap<AtomicInteger> expected1 = leapArray.currentWindow();
              expected1.value().addAndGet(1);
              sleep(mocked, windowLengthInMs);
              WindowWrap<AtomicInteger> expected2 = leapArray.currentWindow();
              expected2.value().addAndGet(2);
              for (int i = 0; i < sampleCount - 2; i++) {
                  sleep(mocked, windowLengthInMs);
                  leapArray.currentWindow().value().addAndGet(i + 3);
              }
  
              assertSame(expected1, leapArray.getValidHead());
              sleep(mocked, windowLengthInMs);
              assertSame(expected2, leapArray.getValidHead());
          }
      }
  
  }