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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
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  package org.apache.cassandra.distributed.test;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.Assert;
  import org.junit.Test;
  
  import org.apache.cassandra.distributed.api.ICluster;
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.metrics.CassandraMetricsRegistry;
  
  public class MetricsTest extends TestBaseImpl
  {
      @Test
      public void testMetrics() throws Throwable
      {
          try (ICluster<IInvokableInstance> cluster = init(builder().withNodes(1)
                                                                    .start()))
          {
              cluster.get(1).runOnInstance(() -> {
                  CassandraMetricsRegistry.Metrics.counter("test_counter").inc(100);
                  CassandraMetricsRegistry.Metrics.counter("test_counter_2").inc(101);
              });
  
              Assert.assertEquals(100, cluster.get(1).metrics().getCounter("test_counter"));
              Assert.assertEquals(ImmutableMap.of("test_counter", 100L,
                                                  "test_counter_2", 101L),
                                  cluster.get(1).metrics().getCounters(s -> s.startsWith("test_counter")));
          }
      }
  }
  