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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
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;
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34 @Category({MetricsTests.class, SmallTests.class})
35 public class TestMetricsRegionServerSourceImpl {
36
37 @Test
38 public void testGetInstance() throws Exception {
39 MetricsRegionServerSourceFactory metricsRegionServerSourceFactory =
40 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class);
41 MetricsRegionServerSource serverSource =
42 metricsRegionServerSourceFactory.createServer(null);
43 assertTrue(serverSource instanceof MetricsRegionServerSourceImpl);
44 assertSame(metricsRegionServerSourceFactory,
45 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceFactory.class));
46 }
47
48
49 @Test(expected = RuntimeException.class)
50 public void testNoGetRegionServerMetricsSourceImpl() throws Exception {
51
52
53 CompatibilitySingletonFactory.getInstance(MetricsRegionServerSourceImpl.class);
54 }
55
56 }