1+ /*
2+ * Copyright 2017 dmfs GmbH
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+
17+ package org .dmfs .tasks .utils ;
18+
19+ import android .support .test .runner .AndroidJUnit4 ;
20+ import android .text .format .Time ;
21+
22+ import org .dmfs .rfc5545 .DateTime ;
23+ import org .dmfs .rfc5545 .Duration ;
24+ import org .junit .Test ;
25+ import org .junit .runner .RunWith ;
26+
27+ import java .util .TimeZone ;
28+
29+
30+ /**
31+ * Test for {@link DateFormatter#toTime(DateTime)} method.
32+ *
33+ * @author Gabor Keszthelyi
34+ */
35+ @ RunWith (AndroidJUnit4 .class )
36+ public class DateTimeToTimeConversionTest
37+ {
38+
39+ @ Test
40+ public void test_toTime_withVariousDateTimes ()
41+ {
42+ assertCorrectlyConverted (DateTime .now ());
43+
44+ assertCorrectlyConverted (DateTime .now (TimeZone .getTimeZone ("UTC+04:00" )));
45+
46+ assertCorrectlyConverted (DateTime .nowAndHere ());
47+
48+ assertCorrectlyConverted (new DateTime (1509473781000L ));
49+
50+ assertCorrectlyConverted (new DateTime (1509473781000L ).addDuration (new Duration (1 , 1 , 0 )));
51+
52+ assertCorrectlyConverted (DateTime .now (TimeZone .getTimeZone ("UTC+04:00" )).shiftTimeZone (TimeZone .getTimeZone ("UTC+05:00" )));
53+
54+ // Floating, all-day
55+ assertCorrectlyConverted (DateTime .now ().toAllDay ());
56+
57+ // Not DST (March 2017 in Hungary):
58+ assertCorrectlyConverted (new DateTime (TimeZone .getTimeZone ("Europe/Budapest" ), 2017 , 2 - 1 , 7 , 15 , 0 , 0 ));
59+ assertCorrectlyConverted (new DateTime (2017 , 2 - 1 , 7 , 15 , 0 , 0 ).shiftTimeZone (TimeZone .getTimeZone ("Europe/Budapest" )));
60+ assertCorrectlyConverted (new DateTime (2017 , 2 - 1 , 7 , 15 , 0 , 0 ).swapTimeZone (TimeZone .getTimeZone ("Europe/Budapest" )));
61+
62+ // DST (July 2017 in Hungary):
63+ assertCorrectlyConverted (new DateTime (TimeZone .getTimeZone ("Europe/Budapest" ), 2017 , 7 - 1 , 7 , 15 , 0 , 0 ));
64+ assertCorrectlyConverted (new DateTime (2017 , 7 - 1 , 7 , 15 , 0 , 0 ).shiftTimeZone (TimeZone .getTimeZone ("Europe/Budapest" )));
65+ assertCorrectlyConverted (new DateTime (2017 , 7 - 1 , 7 , 15 , 0 , 0 ).swapTimeZone (TimeZone .getTimeZone ("Europe/Budapest" )));
66+ }
67+
68+
69+ @ Test (expected = IllegalArgumentException .class )
70+ public void test_toTime_forFloatingButNotAllDayDateTime_throwsSinceItIsNotSupported ()
71+ {
72+ new DateFormatter (null ).toTime (new DateTime (2017 , 7 - 1 , 7 , 15 , 0 , 0 ));
73+ }
74+
75+
76+ private void assertCorrectlyConverted (DateTime dateTime )
77+ {
78+ Time time = new DateFormatter (null ).toTime (dateTime );
79+ if (!isEquivalentDateTimeAndTime (dateTime , time ))
80+ {
81+ throw new AssertionError (String .format ("DateTime=%s and Time=%s are not equivalent" , dateTime , time ));
82+ }
83+ }
84+
85+
86+ /**
87+ * Contains the definition/requirement of when a {@link DateTime} and {@link Time} is considered equivalent in this project.
88+ */
89+ private boolean isEquivalentDateTimeAndTime (DateTime dateTime , Time time )
90+ {
91+ // Time doesn't seem to store in millis precision, there is a 1000 multiplier internally when calculating millis,
92+ // so we can only compare to this precision:
93+ boolean millisMatch =
94+ dateTime .getTimestamp () / 1000
95+ ==
96+ time .toMillis (false ) / 1000 ;
97+
98+ boolean allDaysMatch = time .allDay == dateTime .isAllDay ();
99+
100+ boolean timeZoneMatch =
101+ // If DateTime is floating, all-day then if the all-day flag is matched with Time (checked earlier)
102+ // then we consider the Time's timezone matching, we ignore that basically,
103+ // because Time always has a time zone, and there is no other way to represent all-day date-times with Time.
104+ (dateTime .isFloating () && dateTime .isAllDay ())
105+ ||
106+ // This is the regular case with non-floating DateTime
107+ (dateTime .getTimeZone () != null && time .timezone .equals (dateTime .getTimeZone ().getID ()));
108+
109+ return millisMatch && allDaysMatch && timeZoneMatch ;
110+ }
111+
112+ }
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