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19 package org.apache.hadoop.hbase.regionserver.wal;
20
21 import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
22 import org.apache.hadoop.hbase.testclassification.SmallTests;
23 import org.apache.hadoop.hbase.testclassification.MetricsTests;
24
25 import org.junit.Test;
26 import org.junit.experimental.categories.Category;
27
28 import static org.junit.Assert.assertSame;
29 import static org.junit.Assert.assertTrue;
30
31 @Category({MetricsTests.class, SmallTests.class})
32 public class TestMetricsWALSourceImpl {
33
34 @Test
35 public void testGetInstance() throws Exception {
36 MetricsWALSource walSource =
37 CompatibilitySingletonFactory.getInstance(MetricsWALSource.class);
38 assertTrue(walSource instanceof MetricsWALSourceImpl);
39 assertSame(walSource,
40 CompatibilitySingletonFactory.getInstance(MetricsWALSource.class));
41 }
42 }