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1   /*
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *     http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing, software
14   * distributed under the License is distributed on an "AS IS" BASIS,
15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16   * See the License for the specific language governing permissions and
17   * limitations under the License.
18   */
19  package org.apache.hadoop.hbase.util;
20  
21  import org.apache.hadoop.hbase.MediumTests;
22  import org.junit.Test;
23  import org.junit.experimental.categories.Category;
24  
25  import static org.mockito.Mockito.mock;
26  import static org.mockito.Mockito.when;
27  import static org.mockito.Mockito.verify;
28  
29  import static org.junit.Assert.assertEquals;
30  import static org.junit.Assert.assertFalse;
31  import static org.junit.Assert.assertNotNull;
32  import static org.junit.Assert.assertTrue;
33  
34  @Category(MediumTests.class)
35  public class TestEnvironmentEdgeManager {
36  
37    @Test
38    public void testManageSingleton() {
39      EnvironmentEdgeManager.reset();
40      EnvironmentEdge edge = EnvironmentEdgeManager.getDelegate();
41      assertNotNull(edge);
42      assertTrue(edge instanceof DefaultEnvironmentEdge);
43      EnvironmentEdgeManager.reset();
44      EnvironmentEdge edge2 = EnvironmentEdgeManager.getDelegate();
45      assertFalse(edge == edge2);
46      IncrementingEnvironmentEdge newEdge = new IncrementingEnvironmentEdge();
47      EnvironmentEdgeManager.injectEdge(newEdge);
48      assertEquals(newEdge, EnvironmentEdgeManager.getDelegate());
49  
50      //injecting null will result in default being assigned.
51      EnvironmentEdgeManager.injectEdge(null);
52      EnvironmentEdge nullResult = EnvironmentEdgeManager.getDelegate();
53      assertTrue(nullResult instanceof DefaultEnvironmentEdge);
54    }
55  
56    @Test
57    public void testCurrentTimeInMillis() {
58      EnvironmentEdge mock = mock(EnvironmentEdge.class);
59      EnvironmentEdgeManager.injectEdge(mock);
60      long expectation = 3456;
61      when(mock.currentTimeMillis()).thenReturn(expectation);
62      long result = EnvironmentEdgeManager.currentTimeMillis();
63      verify(mock).currentTimeMillis();
64      assertEquals(expectation, result);
65    }
66  
67  }
68