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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.hadoop.hbase.master;
20  
21  import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
22  import org.apache.hadoop.hbase.master.MetricsMasterSource;
23  import org.apache.hadoop.hbase.master.MetricsMasterSourceFactory;
24  import org.apache.hadoop.hbase.master.MetricsMasterSourceImpl;
25  import org.apache.hadoop.hbase.testclassification.SmallTests;
26  import org.apache.hadoop.hbase.testclassification.MetricsTests;
27  import org.junit.Test;
28  import org.junit.experimental.categories.Category;
29  
30  import static org.junit.Assert.assertSame;
31  import static org.junit.Assert.assertTrue;
32  
33  /**
34   *  Test for MetricsMasterSourceImpl
35   */
36  @Category({MetricsTests.class, SmallTests.class})
37  public class TestMetricsMasterSourceImpl {
38  
39    @Test
40    public void testGetInstance() throws Exception {
41      MetricsMasterSourceFactory metricsMasterSourceFactory = CompatibilitySingletonFactory
42          .getInstance(MetricsMasterSourceFactory.class);
43      MetricsMasterSource masterSource = metricsMasterSourceFactory.create(null);
44      assertTrue(masterSource instanceof MetricsMasterSourceImpl);
45      assertSame(metricsMasterSourceFactory, CompatibilitySingletonFactory.getInstance(MetricsMasterSourceFactory.class));
46    }
47  
48  }