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1import datetime
2from email import utils
3import test.support
4import time
5import unittest
6import sys
7import os.path
8
9class DateTimeTests(unittest.TestCase):
10
11    datestring = 'Sun, 23 Sep 2001 20:10:55'
12    dateargs = (2001, 9, 23, 20, 10, 55)
13    offsetstring = ' -0700'
14    utcoffset = datetime.timedelta(hours=-7)
15    tz = datetime.timezone(utcoffset)
16    naive_dt = datetime.datetime(*dateargs)
17    aware_dt = datetime.datetime(*dateargs, tzinfo=tz)
18
19    def test_naive_datetime(self):
20        self.assertEqual(utils.format_datetime(self.naive_dt),
21                         self.datestring + ' -0000')
22
23    def test_aware_datetime(self):
24        self.assertEqual(utils.format_datetime(self.aware_dt),
25                         self.datestring + self.offsetstring)
26
27    def test_usegmt(self):
28        utc_dt = datetime.datetime(*self.dateargs,
29                                   tzinfo=datetime.timezone.utc)
30        self.assertEqual(utils.format_datetime(utc_dt, usegmt=True),
31                         self.datestring + ' GMT')
32
33    def test_usegmt_with_naive_datetime_raises(self):
34        with self.assertRaises(ValueError):
35            utils.format_datetime(self.naive_dt, usegmt=True)
36
37    def test_usegmt_with_non_utc_datetime_raises(self):
38        with self.assertRaises(ValueError):
39            utils.format_datetime(self.aware_dt, usegmt=True)
40
41    def test_parsedate_to_datetime(self):
42        self.assertEqual(
43            utils.parsedate_to_datetime(self.datestring + self.offsetstring),
44            self.aware_dt)
45
46    def test_parsedate_to_datetime_naive(self):
47        self.assertEqual(
48            utils.parsedate_to_datetime(self.datestring + ' -0000'),
49            self.naive_dt)
50
51
52class LocaltimeTests(unittest.TestCase):
53
54    def test_localtime_is_tz_aware_daylight_true(self):
55        test.support.patch(self, time, 'daylight', True)
56        t = utils.localtime()
57        self.assertIsNotNone(t.tzinfo)
58
59    def test_localtime_is_tz_aware_daylight_false(self):
60        test.support.patch(self, time, 'daylight', False)
61        t = utils.localtime()
62        self.assertIsNotNone(t.tzinfo)
63
64    def test_localtime_daylight_true_dst_false(self):
65        test.support.patch(self, time, 'daylight', True)
66        t0 = datetime.datetime(2012, 3, 12, 1, 1)
67        t1 = utils.localtime(t0, isdst=-1)
68        t2 = utils.localtime(t1)
69        self.assertEqual(t1, t2)
70
71    def test_localtime_daylight_false_dst_false(self):
72        test.support.patch(self, time, 'daylight', False)
73        t0 = datetime.datetime(2012, 3, 12, 1, 1)
74        t1 = utils.localtime(t0, isdst=-1)
75        t2 = utils.localtime(t1)
76        self.assertEqual(t1, t2)
77
78    @test.support.run_with_tz('Europe/Minsk')
79    def test_localtime_daylight_true_dst_true(self):
80        test.support.patch(self, time, 'daylight', True)
81        t0 = datetime.datetime(2012, 3, 12, 1, 1)
82        t1 = utils.localtime(t0, isdst=1)
83        t2 = utils.localtime(t1)
84        self.assertEqual(t1, t2)
85
86    @test.support.run_with_tz('Europe/Minsk')
87    def test_localtime_daylight_false_dst_true(self):
88        test.support.patch(self, time, 'daylight', False)
89        t0 = datetime.datetime(2012, 3, 12, 1, 1)
90        t1 = utils.localtime(t0, isdst=1)
91        t2 = utils.localtime(t1)
92        self.assertEqual(t1, t2)
93
94    @test.support.run_with_tz('EST+05EDT,M3.2.0,M11.1.0')
95    def test_localtime_epoch_utc_daylight_true(self):
96        test.support.patch(self, time, 'daylight', True)
97        t0 = datetime.datetime(1990, 1, 1, tzinfo = datetime.timezone.utc)
98        t1 = utils.localtime(t0)
99        t2 = t0 - datetime.timedelta(hours=5)
100        t2 = t2.replace(tzinfo = datetime.timezone(datetime.timedelta(hours=-5)))
101        self.assertEqual(t1, t2)
102
103    @test.support.run_with_tz('EST+05EDT,M3.2.0,M11.1.0')
104    def test_localtime_epoch_utc_daylight_false(self):
105        test.support.patch(self, time, 'daylight', False)
106        t0 = datetime.datetime(1990, 1, 1, tzinfo = datetime.timezone.utc)
107        t1 = utils.localtime(t0)
108        t2 = t0 - datetime.timedelta(hours=5)
109        t2 = t2.replace(tzinfo = datetime.timezone(datetime.timedelta(hours=-5)))
110        self.assertEqual(t1, t2)
111
112    def test_localtime_epoch_notz_daylight_true(self):
113        test.support.patch(self, time, 'daylight', True)
114        t0 = datetime.datetime(1990, 1, 1)
115        t1 = utils.localtime(t0)
116        t2 = utils.localtime(t0.replace(tzinfo=None))
117        self.assertEqual(t1, t2)
118
119    def test_localtime_epoch_notz_daylight_false(self):
120        test.support.patch(self, time, 'daylight', False)
121        t0 = datetime.datetime(1990, 1, 1)
122        t1 = utils.localtime(t0)
123        t2 = utils.localtime(t0.replace(tzinfo=None))
124        self.assertEqual(t1, t2)
125
126    # XXX: Need a more robust test for Olson's tzdata
127    @unittest.skipIf(sys.platform.startswith('win'),
128                     "Windows does not use Olson's TZ database")
129    @unittest.skipUnless(os.path.exists('/usr/share/zoneinfo') or
130                         os.path.exists('/usr/lib/zoneinfo'),
131                         "Can't find the Olson's TZ database")
132    @test.support.run_with_tz('Europe/Kiev')
133    def test_variable_tzname(self):
134        t0 = datetime.datetime(1984, 1, 1, tzinfo=datetime.timezone.utc)
135        t1 = utils.localtime(t0)
136        self.assertEqual(t1.tzname(), 'MSK')
137        t0 = datetime.datetime(1994, 1, 1, tzinfo=datetime.timezone.utc)
138        t1 = utils.localtime(t0)
139        self.assertEqual(t1.tzname(), 'EET')
140
141# Issue #24836: The timezone files are out of date (pre 2011k)
142# on Mac OS X Snow Leopard.
143@test.support.requires_mac_ver(10, 7)
144class FormatDateTests(unittest.TestCase):
145
146    @test.support.run_with_tz('Europe/Minsk')
147    def test_formatdate(self):
148        timeval = time.mktime((2011, 12, 1, 18, 0, 0, 4, 335, 0))
149        string = utils.formatdate(timeval, localtime=False, usegmt=False)
150        self.assertEqual(string, 'Thu, 01 Dec 2011 15:00:00 -0000')
151        string = utils.formatdate(timeval, localtime=False, usegmt=True)
152        self.assertEqual(string, 'Thu, 01 Dec 2011 15:00:00 GMT')
153
154    @test.support.run_with_tz('Europe/Minsk')
155    def test_formatdate_with_localtime(self):
156        timeval = time.mktime((2011, 1, 1, 18, 0, 0, 6, 1, 0))
157        string = utils.formatdate(timeval, localtime=True)
158        self.assertEqual(string, 'Sat, 01 Jan 2011 18:00:00 +0200')
159        # Minsk moved from +0200 (with DST) to +0300 (without DST) in 2011
160        timeval = time.mktime((2011, 12, 1, 18, 0, 0, 4, 335, 0))
161        string = utils.formatdate(timeval, localtime=True)
162        self.assertEqual(string, 'Thu, 01 Dec 2011 18:00:00 +0300')
163
164if __name__ == '__main__':
165    unittest.main()
166