1 /*
2 * Copyright (C) 2016, Google Inc.
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,
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40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.junit.time;
45
46 import java.time.Duration;
47 import java.util.concurrent.TimeUnit;
48
49 import org.eclipse.jgit.util.time.MonotonicClock;
50 import org.eclipse.jgit.util.time.ProposedTimestamp;
51
52 /**
53 * Fake {@link MonotonicClock} for testing code that uses Clock.
54 *
55 * @since 4.6
56 */
57 public class MonotonicFakeClock implements MonotonicClock {
58 private long now = TimeUnit.SECONDS.toMicros(42);
59
60 /**
61 * Advance the time returned by future calls to {@link #propose()}.
62 *
63 * @param add
64 * amount of time to add; must be {@code > 0}.
65 * @param unit
66 * unit of {@code add}.
67 */
68 public void tick(long add, TimeUnit unit) {
69 if (add <= 0) {
70 throw new IllegalArgumentException();
71 }
72 now += unit.toMillis(add);
73 }
74
75 @Override
76 public ProposedTimestamp propose() {
77 long t = now++;
78 return new ProposedTimestamp() {
79 @Override
80 public long read(TimeUnit unit) {
81 return unit.convert(t, TimeUnit.MILLISECONDS);
82 }
83
84 @Override
85 public void blockUntil(Duration maxWait) {
86 // Nothing to do, since fake time does not go backwards.
87 }
88 };
89 }
90 }