1   /*
2    * Copyright 2010 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  package org.apache.hadoop.hbase.util;
21  
22  import org.junit.Test;
23  
24  import static org.mockito.Mockito.mock;
25  import static org.mockito.Mockito.when;
26  import static org.mockito.Mockito.verify;
27  
28  import static org.junit.Assert.assertEquals;
29  import static org.junit.Assert.assertFalse;
30  import static org.junit.Assert.assertNotNull;
31  import static org.junit.Assert.assertTrue;
32  
33  public class TestEnvironmentEdgeManager {
34  
35    @Test
36    public void testManageSingleton() {
37      EnvironmentEdge edge = EnvironmentEdgeManager.getDelegate();
38      assertNotNull(edge);
39      assertTrue(edge instanceof DefaultEnvironmentEdge);
40      EnvironmentEdgeManager.reset();
41      EnvironmentEdge edge2 = EnvironmentEdgeManager.getDelegate();
42      assertFalse(edge == edge2);
43      IncrementingEnvironmentEdge newEdge = new IncrementingEnvironmentEdge();
44      EnvironmentEdgeManager.injectEdge(newEdge);
45      assertEquals(newEdge, EnvironmentEdgeManager.getDelegate());
46  
47      //injecting null will result in default being assigned.
48      EnvironmentEdgeManager.injectEdge(null);
49      EnvironmentEdge nullResult = EnvironmentEdgeManager.getDelegate();
50      assertTrue(nullResult instanceof DefaultEnvironmentEdge);
51    }
52  
53    @Test
54    public void testCurrentTimeInMillis() {
55      EnvironmentEdge mock = mock(EnvironmentEdge.class);
56      EnvironmentEdgeManager.injectEdge(mock);
57      long expectation = 3456;
58      when(mock.currentTimeMillis()).thenReturn(expectation);
59      long result = EnvironmentEdgeManager.currentTimeMillis();
60      verify(mock).currentTimeMillis();
61      assertEquals(expectation, result);
62    }
63  }