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19 package org.apache.hadoop.hbase.regionserver;
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 import org.junit.Test;
25 import org.junit.experimental.categories.Category;
26
27 import static org.junit.Assert.assertSame;
28 import static org.junit.Assert.assertTrue;
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33 @Category({MetricsTests.class, SmallTests.class})
34 public class TestMetricsRegionServerSourceImpl {
35
36 @Test
37 public void testGetInstance() throws Exception {
38 MetricsRegionServerSourceFactory metricsRegionServerSourceFactory =
39 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class);
40 MetricsRegionServerSource serverSource =
41 metricsRegionServerSourceFactory.createServer(null);
42 assertTrue(serverSource instanceof MetricsRegionServerSourceImpl);
43 assertSame(metricsRegionServerSourceFactory,
44 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class));
45 }
46
47
48 @Test(expected = RuntimeException.class)
49 public void testNoGetRegionServerMetricsSourceImpl() throws Exception {
50
51
52 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceImpl.class);
53 }
54 }