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 }