content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.metrics.jvm;
  
  import org.junit.Test;
  
  import java.lang.management.CompilationMXBean;
  import java.util.concurrent.TimeUnit;
  
  import static com.alibaba.metrics.Constants.NOT_AVAILABLE;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  public class CompilationGaugeTest {
  
      private final CompilationMXBean cm = mock(CompilationMXBean.class);
      private final CompilationGauge gauge = new CompilationGauge(1L, TimeUnit.SECONDS, cm);
  
      @Test
      public void compilationGauge() throws Exception {
          when(cm.isCompilationTimeMonitoringSupported()).thenReturn(true);
          when(cm.getTotalCompilationTime()).thenReturn(100L);
          assertThat(gauge.getValue()).isEqualTo(NOT_AVAILABLE);
          when(cm.getTotalCompilationTime()).thenReturn(120L);
          Thread.sleep(1200);
          assertThat(gauge.getValue()).isEqualTo(20L);
      }
  }
  