1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.util;
18
19import android.support.test.filters.SmallTest;
20
21import junit.framework.TestCase;
22
23import java.time.Clock;
24import java.time.Instant;
25import java.time.Period;
26import java.time.ZoneId;
27import java.time.ZonedDateTime;
28import java.util.Iterator;
29
30@SmallTest
31public class RecurrenceRuleTest extends TestCase {
32
33    static Clock sOriginalClock;
34
35    @Override
36    protected void setUp() throws Exception {
37        super.setUp();
38        sOriginalClock = RecurrenceRule.sClock;
39    }
40
41    @Override
42    protected void tearDown() throws Exception {
43        super.tearDown();
44        RecurrenceRule.sClock = sOriginalClock;
45    }
46
47    private void setClock(Instant instant) {
48        RecurrenceRule.sClock = Clock.fixed(instant, ZoneId.systemDefault());
49    }
50
51    public void testSimpleMonth() throws Exception {
52        setClock(Instant.parse("2015-11-20T10:15:30.00Z"));
53        final RecurrenceRule r = new RecurrenceRule(
54                ZonedDateTime.parse("2010-11-14T00:00:00.000Z"),
55                null,
56                Period.ofMonths(1));
57
58        assertTrue(r.isMonthly());
59
60        final Iterator<Pair<ZonedDateTime, ZonedDateTime>> it = r.cycleIterator();
61        assertTrue(it.hasNext());
62        assertEquals(Pair.create(
63                ZonedDateTime.parse("2015-11-14T00:00:00.00Z"),
64                ZonedDateTime.parse("2015-12-14T00:00:00.00Z")), it.next());
65        assertTrue(it.hasNext());
66        assertEquals(Pair.create(
67                ZonedDateTime.parse("2015-10-14T00:00:00.00Z"),
68                ZonedDateTime.parse("2015-11-14T00:00:00.00Z")), it.next());
69    }
70
71    public void testSimpleDays() throws Exception {
72        setClock(Instant.parse("2015-01-01T10:15:30.00Z"));
73        final RecurrenceRule r = new RecurrenceRule(
74                ZonedDateTime.parse("2010-11-14T00:11:00.000Z"),
75                ZonedDateTime.parse("2010-11-20T00:11:00.000Z"),
76                Period.ofDays(3));
77
78        assertFalse(r.isMonthly());
79
80        final Iterator<Pair<ZonedDateTime, ZonedDateTime>> it = r.cycleIterator();
81        assertTrue(it.hasNext());
82        assertEquals(Pair.create(
83                ZonedDateTime.parse("2010-11-17T00:11:00.00Z"),
84                ZonedDateTime.parse("2010-11-20T00:11:00.00Z")), it.next());
85        assertTrue(it.hasNext());
86        assertEquals(Pair.create(
87                ZonedDateTime.parse("2010-11-14T00:11:00.00Z"),
88                ZonedDateTime.parse("2010-11-17T00:11:00.00Z")), it.next());
89        assertFalse(it.hasNext());
90    }
91
92    public void testNotRecurring() throws Exception {
93        setClock(Instant.parse("2015-01-01T10:15:30.00Z"));
94        final RecurrenceRule r = new RecurrenceRule(
95                ZonedDateTime.parse("2010-11-14T00:11:00.000Z"),
96                ZonedDateTime.parse("2010-11-20T00:11:00.000Z"),
97                null);
98
99        assertFalse(r.isMonthly());
100
101        final Iterator<Pair<ZonedDateTime, ZonedDateTime>> it = r.cycleIterator();
102        assertTrue(it.hasNext());
103        assertEquals(Pair.create(
104                ZonedDateTime.parse("2010-11-14T00:11:00.000Z"),
105                ZonedDateTime.parse("2010-11-20T00:11:00.000Z")), it.next());
106        assertFalse(it.hasNext());
107    }
108
109    public void testNever() throws Exception {
110        setClock(Instant.parse("2015-01-01T10:15:30.00Z"));
111        final RecurrenceRule r = RecurrenceRule.buildNever();
112
113        assertFalse(r.isMonthly());
114
115        final Iterator<Pair<ZonedDateTime, ZonedDateTime>> it = r.cycleIterator();
116        assertFalse(it.hasNext());
117    }
118
119    public void testSane() throws Exception {
120        final RecurrenceRule r = new RecurrenceRule(
121                ZonedDateTime.parse("1980-01-31T00:00:00.000Z"),
122                ZonedDateTime.parse("2030-01-31T00:00:00.000Z"),
123                Period.ofMonths(1));
124
125        final Iterator<Pair<ZonedDateTime, ZonedDateTime>> it = r.cycleIterator();
126        ZonedDateTime lastStart = null;
127        int months = 0;
128        while (it.hasNext()) {
129            final Pair<ZonedDateTime, ZonedDateTime> cycle = it.next();
130
131            // Make sure cycle has reasonable length
132            final long length = cycle.second.toEpochSecond() - cycle.first.toEpochSecond();
133            assertTrue(cycle + " must be more than 4 weeks", length >= 2419200);
134            assertTrue(cycle + " must be less than 5 weeks", length <= 3024000);
135
136            // Make sure we have no gaps
137            if (lastStart != null) {
138                assertEquals(lastStart, cycle.second);
139            }
140            lastStart = cycle.first;
141            months++;
142        }
143
144        assertEquals(600, months);
145    }
146}
147