Add unit tests for module_utils.compat.datetime (#81483)

test/units/module_utils/compat/test_datetime.py

@@ -0,0 +1,34 @@
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import datetime
+
+from ansible.module_utils.compat.datetime import utcnow, utcfromtimestamp, UTC
+from ansible.module_utils.six import PY3
+
+
+def test_utc():
+    assert UTC.tzname(None) == 'UTC'
+    assert UTC.utcoffset(None) == datetime.timedelta(0)
+
+    if PY3:
+        assert UTC.dst(None) is None
+    else:
+        assert UTC.dst(None) == datetime.timedelta(0)
+
+
+def test_utcnow():
+    assert utcnow().tzinfo is UTC
+
+
+def test_utcfometimestamp_zero():
+    dt = utcfromtimestamp(0)
+
+    assert dt.tzinfo is UTC
+    assert dt.year == 1970
+    assert dt.month == 1
+    assert dt.day == 1
+    assert dt.hour == 0
+    assert dt.minute == 0
+    assert dt.second == 0
+    assert dt.microsecond == 0