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.metric;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  import com.alibaba.csp.sentinel.node.metric.MetricNode;
  import com.alibaba.csp.sentinel.slots.statistic.MetricEvent;
  import com.alibaba.csp.sentinel.slots.statistic.base.WindowWrap;
  import com.alibaba.csp.sentinel.slots.statistic.data.MetricBucket;
  import com.alibaba.csp.sentinel.util.function.Predicate;
  
  import org.junit.Test;
  
  import static org.junit.Assert.*;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  /**
   * Test cases for {@link ArrayMetric}.
   *
   * @author Eric Zhao
   */
  public class ArrayMetricTest {
  
      private final int windowLengthInMs = 500;
  
      @Test
      public void testOperateArrayMetric() {
          BucketLeapArray leapArray = mock(BucketLeapArray.class);
          final WindowWrap<MetricBucket> windowWrap = new WindowWrap<MetricBucket>(windowLengthInMs, 0,
              new MetricBucket());
          when(leapArray.currentWindow()).thenReturn(windowWrap);
          when(leapArray.values()).thenReturn(new ArrayList<MetricBucket>() {{ add(windowWrap.value()); }});
  
          ArrayMetric metric = new ArrayMetric(leapArray);
  
          final int expectedPass = 9;
          final int expectedBlock = 2;
          final int expectedSuccess = 9;
          final int expectedException = 6;
          final int expectedRt = 21;
  
          metric.addRT(expectedRt);
          for (int i = 0; i < expectedPass; i++) {
              metric.addPass(1);
          }
          for (int i = 0; i < expectedBlock; i++) {
              metric.addBlock(1);
          }
          for (int i = 0; i < expectedSuccess; i++) {
              metric.addSuccess(1);
          }
          for (int i = 0; i < expectedException; i++) {
              metric.addException(1);
          }
  
          assertEquals(expectedPass, metric.pass());
          assertEquals(expectedBlock, metric.block());
          assertEquals(expectedSuccess, metric.success());
          assertEquals(expectedException, metric.exception());
          assertEquals(expectedRt, metric.rt());
      }
  
      @Test
      public void testGetMetricDetailsOnCondition() {
          BucketLeapArray leapArray = mock(BucketLeapArray.class);
          // Mock interval=2s, sampleCount=2
          final WindowWrap<MetricBucket> w1 = new WindowWrap<>(windowLengthInMs, 500,
              new MetricBucket().add(MetricEvent.PASS, 1));
          final WindowWrap<MetricBucket> w2 = new WindowWrap<>(windowLengthInMs, 1000,
              new MetricBucket().add(MetricEvent.PASS, 2));
          final WindowWrap<MetricBucket> w3 = new WindowWrap<>(windowLengthInMs, 1500,
              new MetricBucket().add(MetricEvent.PASS, 3));
          final WindowWrap<MetricBucket> w4 = new WindowWrap<>(windowLengthInMs, 2000,
              new MetricBucket().add(MetricEvent.PASS, 4));
          List<WindowWrap<MetricBucket>> buckets = Arrays.asList(w1, w2, w3, w4);
          when(leapArray.currentWindow()).thenReturn(w4);
          when(leapArray.list()).thenReturn(buckets);
  
          ArrayMetric metric = new ArrayMetric(leapArray);
  
          // Empty condition -> retrieve all
          assertEquals(4, metric.detailsOnCondition(null).size());
          // Normal condition
          List<MetricNode> metricNodes = metric.detailsOnCondition(new Predicate<Long>() {
              @Override
              public boolean test(Long t) {
                  return t >= 1500;
              }
          });
          assertEquals(2, metricNodes.size());
          assertEquals(3, metricNodes.get(0).getPassQps());
          assertEquals(4, metricNodes.get(1).getPassQps());
  
          // Future condition
          metricNodes = metric.detailsOnCondition(new Predicate<Long>() {
              @Override
              public boolean test(Long t) {
                  return t >= 2500;
              }
          });
          assertEquals(0, metricNodes.size());
      }
  }
  