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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.regionserver;
20  
21  import static org.junit.Assert.assertEquals;
22  import static org.junit.Assert.assertNotEquals;
23  import static org.junit.Assert.assertTrue;
24  
25  import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
26  import org.apache.hadoop.hbase.testclassification.SmallTests;
27  import org.junit.Test;
28  import org.junit.experimental.categories.Category;
29  
30  @Category({SmallTests.class})
31  public class TestMetricsUserSourceImpl {
32  
33    @Test
34    public void testCompareToHashCodeEquals() throws Exception {
35      MetricsRegionServerSourceFactory fact
36        = CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class);
37  
38      MetricsUserSource one = fact.createUser("ONE");
39      MetricsUserSource oneClone = fact.createUser("ONE");
40      MetricsUserSource two = fact.createUser("TWO");
41  
42      assertEquals(0, one.compareTo(oneClone));
43      assertEquals(one.hashCode(), oneClone.hashCode());
44      assertNotEquals(one, two);
45  
46      assertTrue( one.compareTo(two) != 0);
47      assertTrue( two.compareTo(one) != 0);
48      assertTrue( two.compareTo(one) != one.compareTo(two));
49      assertTrue( two.compareTo(two) == 0);
50    }
51  
52  
53    @Test (expected = RuntimeException.class)
54    public void testNoGetRegionServerMetricsSourceImpl() throws Exception {
55      // This should throw an exception because MetricsUserSourceImpl should only
56      // be created by a factory.
57      CompatibilitySingletonFactory.getInstance(MetricsUserSource.class);
58    }
59  
60    @Test
61    public void testGetUser() {
62      MetricsRegionServerSourceFactory fact
63        = CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class);
64  
65      MetricsUserSource one = fact.createUser("ONE");
66      assertEquals("ONE", one.getUser());
67    }
68  
69  }