Implement fix for issue #282, QuickTime metadata

tests/test_datetime_utils.py

@@ -1,90 +1,96 @@
-""" test datetime_utils """
+from datetime import date, timezone
 import pytest
 
+from osxphotos.datetime_utils import *
+
 
 def test_get_local_tz():
-    """ test get_local_tz during time with no DST """
     import datetime
     import os
-    import time
-
-    from osxphotos.datetime_utils import get_local_tz
 
     os.environ["TZ"] = "US/Pacific"
-    time.tzset()
 
-    dt = datetime.datetime(2018, 12, 31, 0, 0, 0)
-    local_tz = get_local_tz(dt)
-    assert local_tz == datetime.timezone(
-        datetime.timedelta(days=-1, seconds=57600), "PST"
-    )
+    dt = datetime.datetime(2020, 9, 1, 21, 10, 00)
+    tz = get_local_tz(dt)
+    assert tz == datetime.timezone(offset=datetime.timedelta(seconds=-25200))
 
-
-def test_get_local_tz_dst():
-    """ test get_local_tz during time with DST """
-    import datetime
-    import os
-    import time
-
-    from osxphotos.datetime_utils import get_local_tz
-
-    os.environ["TZ"] = "US/Pacific"
-    time.tzset()
-
-    dt = datetime.datetime(2018, 6, 30, 0, 0, 0)
-    local_tz = get_local_tz(dt)
-    assert local_tz == datetime.timezone(
-        datetime.timedelta(days=-1, seconds=61200), "PDT"
-    )
-
-
-def test_datetime_remove_tz():
-    """ test datetime_remove_tz """
-    import datetime
-
-    from osxphotos.datetime_utils import datetime_remove_tz
-
-    dt = datetime.datetime(
-        2018,
-        12,
-        31,
-        tzinfo=datetime.timezone(datetime.timedelta(days=-1, seconds=57600), "PST"),
-    )
-    dt_no_tz = datetime_remove_tz(dt)
-    assert dt_no_tz.tzinfo is None
+    dt = datetime.datetime(2020, 12, 1, 21, 10, 00)
+    tz = get_local_tz(dt)
+    assert tz == datetime.timezone(offset=datetime.timedelta(seconds=-28800))
 
 
 def test_datetime_has_tz():
-    """ test datetime_has_tz """
     import datetime
 
-    from osxphotos.datetime_utils import datetime_has_tz
-
-    dt = datetime.datetime(
-        2018,
-        12,
-        31,
-        tzinfo=datetime.timezone(datetime.timedelta(days=-1, seconds=57600), "PST"),
-    )
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=-28800))
+    dt = datetime.datetime(2020, 9, 1, 21, 10, 00, tzinfo=tz)
     assert datetime_has_tz(dt)
 
-    dt_notz = datetime.datetime(2018, 12, 31)
-    assert not datetime_has_tz(dt_notz)
+    dt = datetime.datetime(2020, 9, 1, 21, 10, 00)
+    assert not datetime_has_tz(dt)
+
+
+def test_datetime_tz_to_utc():
+    import datetime
+
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=-25200))
+    dt = datetime.datetime(2020, 9, 1, 22, 6, 0, tzinfo=tz)
+    utc = datetime_tz_to_utc(dt)
+    assert utc == datetime.datetime(2020, 9, 2, 5, 6, 0, tzinfo=datetime.timezone.utc)
+
+
+def test_datetime_remove_tz():
+    import datetime
+    import os
+
+    os.environ["TZ"] = "US/Pacific"
+
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=-25200))
+    dt = datetime.datetime(2020, 9, 1, 22, 6, 0, tzinfo=tz)
+    dt = datetime_remove_tz(dt)
+    assert dt == datetime.datetime(2020, 9, 1, 22, 6, 0)
+    assert not datetime_has_tz(dt)
+
+
+def test_datetime_naive_to_utc():
+    import datetime
+
+    dt = datetime.datetime(2020, 9, 1, 12, 0, 0)
+    utc = datetime_naive_to_utc(dt)
+    assert utc == datetime.datetime(2020, 9, 1, 12, 0, 0, tzinfo=datetime.timezone.utc)
 
 
 def test_datetime_naive_to_local():
-    """ test datetime_naive_to_local """
     import datetime
     import os
-    import time
-
-    from osxphotos.datetime_utils import datetime_naive_to_local
 
     os.environ["TZ"] = "US/Pacific"
-    time.tzset()
 
-    dt = datetime.datetime(2018, 6, 30, 0, 0, 0)
-    dt_local = datetime_naive_to_local(dt)
-    assert dt_local.tzinfo == datetime.timezone(
-        datetime.timedelta(days=-1, seconds=61200), "PDT"
-    )
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=-25200))
+    dt = datetime.datetime(2020, 9, 1, 12, 0, 0)
+    utc = datetime_naive_to_local(dt)
+    assert utc == datetime.datetime(2020, 9, 1, 12, 0, 0, tzinfo=tz)
+
+
+def test_datetime_utc_to_local():
+    import datetime
+    import os
+
+    os.environ["TZ"] = "US/Pacific"
+
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=-25200))
+    utc = datetime.datetime(2020, 9, 1, 19, 0, 0, tzinfo=datetime.timezone.utc)
+    dt = datetime_utc_to_local(utc)
+    assert dt == datetime.datetime(2020, 9, 1, 12, 0, 0, tzinfo=tz)
+
+
+def test_datetime_utc_to_local_2():
+    import datetime
+    import os
+
+    os.environ["TZ"] = "CEST"
+
+    tz = datetime.timezone(offset=datetime.timedelta(seconds=7200))
+    utc = datetime.datetime(2020, 9, 1, 19, 0, 0, tzinfo=datetime.timezone.utc)
+    dt = datetime_utc_to_local(utc)
+    assert dt == datetime.datetime(2020, 9, 1, 21, 0, 0, tzinfo=tz)