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