Add test

Author: Val Brodsky

tests/unit/test_utils.py

@@ -0,0 +1,17 @@
+import pytest
+from labelbox.utils import format_iso_datetime, format_iso_from_string
+
+
+@pytest.mark.parametrize(
+    'datetime_str, expected_datetime_str',
+    [
+        ('2011-11-04T00:05:23Z', '2011-11-04T00:05:23Z'),
+        ('2011-11-04T00:05:23+00:00', '2011-11-04T00:05:23Z'),
+        ('2011-11-04T00:05:23+05:00', '2011-11-04T00:05:23Z'
+        ),  #NOTE not converting with timezone... this is compatible with out current implementation
+        ('2011-11-04T00:05:23', '2011-11-04T00:05:23Z')
+    ])
+def test_datetime_parsing(datetime_str, expected_datetime_str):
+    # NOTE I would normally not tested expected using another function from sdk code, but in this case this is exactly the usage in _validate_parse_datetime
+    assert format_iso_datetime(
+        format_iso_from_string(datetime_str)) == expected_datetime_str