account for differing datetime strings in dict comparison utility function

Author: simonkassel

pystac/item.py

@@ -74,7 +74,7 @@ def to_dict(self, include_self_link=True):
 
         assets = dict(map(lambda x: (x[0], x[1].to_dict()), self.assets.items()))
 
-        self.properties['datetime'] = '{}Z'.format(self.datetime.replace(microsecond=0, tzinfo=None))
+        self.properties['datetime'] = self.datetime.isoformat()
 
         d = {
             'type': 'Feature',

tests/utils.py

@@ -1,7 +1,8 @@
 import os
 import json
 from datetime import datetime
-
+from copy import copy
+from dateutil.parser import parse
 import jsonschema
 from jsonschema.validators import RefResolver
 
@@ -164,4 +165,23 @@ def validate_dict(self, d, obj_type):
             raise e
 
 def test_to_from_dict(stac_object_class, d):
-    return stac_object_class.from_dict(d).to_dict() == d
+    def _parse_times(dd):
+        a_dict = copy(dd)
+        for k, v in a_dict.items():
+            if isinstance(v, dict):
+                _parse_times(v)
+            elif isinstance(v, (tuple, list, set)):
+                for vv in v:
+                    if isinstance(vv, dict):
+                        _parse_times(vv)
+            else:
+                if k == 'datetime':
+                    if not isinstance(v, datetime):
+                        a_dict[k] = parse(v)
+        
+        return a_dict
+
+    d1 = _parse_times(d) 
+    d2 = _parse_times(stac_object_class.from_dict(d).to_dict())
+               
+    return d1 == d2