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 package org.apache.hadoop.hbase.regionserver.wal;
19
20 import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
21 import org.junit.Test;
22
23 import static org.junit.Assert.assertSame;
24 import static org.junit.Assert.assertTrue;
25
26 public class TestMetricsWALSourceImpl {
27
28 @Test
29 public void testGetInstance() throws Exception {
30 MetricsWALSource walSource =
31 CompatibilitySingletonFactory.getInstance(MetricsWALSource.class);
32 assertTrue(walSource instanceof MetricsWALSourceImpl);
33 assertSame(walSource,
34 CompatibilitySingletonFactory.getInstance(MetricsWALSource.class));
35 }
36 }