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1   /*
2    * Copyright (C) 2019, Thomas Wolf <thomas.wolf@paranor.ch>
3    * and other copyright owners as documented in the project's IP log.
4    *
5    * This program and the accompanying materials are made available
6    * under the terms of the Eclipse Distribution License v1.0 which
7    * accompanies this distribution, is reproduced below, and is
8    * available at http://www.eclipse.org/org/documents/edl-v10.php
9    *
10   * All rights reserved.
11   *
12   * Redistribution and use in source and binary forms, with or
13   * without modification, are permitted provided that the following
14   * conditions are met:
15   *
16   * - Redistributions of source code must retain the above copyright
17   *   notice, this list of conditions and the following disclaimer.
18   *
19   * - Redistributions in binary form must reproduce the above
20   *   copyright notice, this list of conditions and the following
21   *   disclaimer in the documentation and/or other materials provided
22   *   with the distribution.
23   *
24   * - Neither the name of the Eclipse Foundation, Inc. nor the
25   *   names of its contributors may be used to endorse or promote
26   *   products derived from this software without specific prior
27   *   written permission.
28   *
29   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42   */
43  package org.eclipse.jgit.treewalk;
44  
45  import static org.junit.Assert.assertEquals;
46  import static org.junit.Assert.assertTrue;
47  
48  import java.time.Instant;
49  
50  import org.junit.Test;
51  
52  public class InstantComparatorTest {
53  
54  	private final InstantComparator cmp = new InstantComparator();
55  
56  	@Test
57  	public void compareNow() {
58  		Instant now = Instant.now();
59  		assertEquals(0, cmp.compare(now, now));
60  		assertEquals(0, cmp.compare(now, now, true));
61  	}
62  
63  	@Test
64  	public void compareSeconds() {
65  		Instant now = Instant.now();
66  		Instant t = Instant.ofEpochSecond(now.getEpochSecond());
67  		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
68  		assertEquals(0, cmp.compare(t, s));
69  		assertEquals(0, cmp.compare(t, t));
70  		assertEquals(0, cmp.compare(s, t));
71  	}
72  
73  	@Test
74  	public void compareSecondsOnly() {
75  		Instant now = Instant.now();
76  		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 987654321);
77  		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
78  		assertEquals(0, cmp.compare(t, s, true));
79  		assertEquals(0, cmp.compare(t, t, true));
80  		assertEquals(0, cmp.compare(s, t, true));
81  	}
82  
83  	@Test
84  	public void compareSecondsUnequal() {
85  		Instant now = Instant.now();
86  		Instant t = Instant.ofEpochSecond(now.getEpochSecond());
87  		Instant s = Instant.ofEpochSecond(now.getEpochSecond() - 1L);
88  		assertTrue(cmp.compare(s, t) < 0);
89  		assertTrue(cmp.compare(t, s) > 0);
90  	}
91  
92  	@Test
93  	public void compareMillisEqual() {
94  		Instant now = Instant.now();
95  		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123000000);
96  		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
97  		assertEquals(0, cmp.compare(s, t));
98  		assertEquals(0, cmp.compare(t, t));
99  		assertEquals(0, cmp.compare(t, s));
100 		s = Instant.ofEpochSecond(now.getEpochSecond(), 123456000);
101 		assertEquals(0, cmp.compare(s, t));
102 		assertEquals(0, cmp.compare(t, s));
103 		s = Instant.ofEpochSecond(now.getEpochSecond(), 123400000);
104 		assertEquals(0, cmp.compare(s, t));
105 		assertEquals(0, cmp.compare(t, s));
106 	}
107 
108 	@Test
109 	public void compareMillisUnequal() {
110 		Instant now = Instant.now();
111 		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123000000);
112 		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 122000000);
113 		assertTrue(cmp.compare(s, t) < 0);
114 		assertTrue(cmp.compare(t, s) > 0);
115 		t = Instant.ofEpochSecond(now.getEpochSecond(), 130000000);
116 		assertTrue(cmp.compare(s, t) < 0);
117 		assertTrue(cmp.compare(t, s) > 0);
118 		t = Instant.ofEpochSecond(now.getEpochSecond(), 200000000);
119 		assertTrue(cmp.compare(s, t) < 0);
120 		assertTrue(cmp.compare(t, s) > 0);
121 		s = Instant.ofEpochSecond(now.getEpochSecond() - 1L, 123000000);
122 		assertTrue(cmp.compare(s, t) < 0);
123 		assertTrue(cmp.compare(t, s) > 0);
124 	}
125 
126 	@Test
127 	public void compareMicrosEqual() {
128 		Instant now = Instant.now();
129 		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123456000);
130 		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
131 		assertEquals(0, cmp.compare(s, t));
132 		assertEquals(0, cmp.compare(t, s));
133 		s = Instant.ofEpochSecond(now.getEpochSecond(), 123456700);
134 		assertEquals(0, cmp.compare(s, t));
135 		assertEquals(0, cmp.compare(t, s));
136 	}
137 
138 	@Test
139 	public void compareMicrosUnequal() {
140 		Instant now = Instant.now();
141 		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123456000);
142 		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123455000);
143 		assertTrue(cmp.compare(s, t) < 0);
144 		assertTrue(cmp.compare(t, s) > 0);
145 		t = Instant.ofEpochSecond(now.getEpochSecond(), 123460000);
146 		assertTrue(cmp.compare(s, t) < 0);
147 		assertTrue(cmp.compare(t, s) > 0);
148 		t = Instant.ofEpochSecond(now.getEpochSecond(), 123500000);
149 		assertTrue(cmp.compare(s, t) < 0);
150 		assertTrue(cmp.compare(t, s) > 0);
151 		s = Instant.ofEpochSecond(now.getEpochSecond() - 1L, 123456000);
152 		assertTrue(cmp.compare(s, t) < 0);
153 		assertTrue(cmp.compare(t, s) > 0);
154 	}
155 
156 	@Test
157 	public void compareNanosEqual() {
158 		Instant now = Instant.now();
159 		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
160 		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
161 		assertEquals(0, cmp.compare(s, t));
162 		assertEquals(0, cmp.compare(t, s));
163 	}
164 
165 	@Test
166 	public void compareNanosUnequal() {
167 		Instant now = Instant.now();
168 		Instant t = Instant.ofEpochSecond(now.getEpochSecond(), 123456789);
169 		Instant s = Instant.ofEpochSecond(now.getEpochSecond(), 123456700);
170 		assertTrue(cmp.compare(s, t) < 0);
171 		assertTrue(cmp.compare(t, s) > 0);
172 		t = Instant.ofEpochSecond(now.getEpochSecond(), 123456800);
173 		assertTrue(cmp.compare(s, t) < 0);
174 		assertTrue(cmp.compare(t, s) > 0);
175 		s = Instant.ofEpochSecond(now.getEpochSecond() - 1L, 123456789);
176 		assertTrue(cmp.compare(s, t) < 0);
177 		assertTrue(cmp.compare(t, s) > 0);
178 		s = Instant.ofEpochSecond(now.getEpochSecond(), 123456788);
179 		assertTrue(cmp.compare(s, t) < 0);
180 		assertTrue(cmp.compare(t, s) > 0);
181 	}
182 }