start testing with pytest

tests/test_utils.py

@@ -0,0 +1,27 @@
+"""
+test classes and functions in utils.py
+"""
+
+
+import datetime
+from zoneinfo import ZoneInfo
+
+import time_machine
+
+from ffplayout.utils import get_date, playlist
+
+# set time zone
+_TZ = ZoneInfo("Europe/Berlin")
+# fake date and time
+SOURCE_TIME = [2021, 5, 26, 0, 0, 0]
+
+
+@time_machine.travel(datetime.datetime(*SOURCE_TIME, tzinfo=_TZ))
+def test_start_zero():
+    playlist.start = 0
+    assert get_date(False, 86401) == '2021-05-27'
+    assert get_date(False, (24*60*60) - 1) == '2021-05-26'
+
+
+if __name__ == '__main__':
+    test_start_zero()