CDK: improve day_delta macro and MinMaxDatetime component

airbyte-cdk/python/airbyte_cdk/sources/declarative/datetime/min_max_datetime.py

@@ -62,11 +62,15 @@ def get_datetime(self, config, **additional_options) -> dt.datetime:
         time = self._parser.parse(str(self.datetime.eval(config, **additional_options)), datetime_format, self.timezone)
 
         if self.min_datetime:
-            min_time = self._parser.parse(str(self.min_datetime.eval(config, **additional_options)), datetime_format, self.timezone)
-            time = max(time, min_time)
+            min_time = str(self.min_datetime.eval(config, **additional_options))
+            if min_time:
+                min_time = self._parser.parse(min_time, datetime_format, self.timezone)
+                time = max(time, min_time)
         if self.max_datetime:
-            max_time = self._parser.parse(str(self.max_datetime.eval(config, **additional_options)), datetime_format, self.timezone)
-            time = min(time, max_time)
+            max_time = str(self.max_datetime.eval(config, **additional_options))
+            if max_time:
+                max_time = self._parser.parse(max_time, datetime_format, self.timezone)
+                time = min(time, max_time)
         return time
 
     @property

airbyte-cdk/python/airbyte_cdk/sources/declarative/interpolation/macros.py

@@ -83,7 +83,7 @@ def max(*args):
     return builtins.max(*args)
 
 
-def day_delta(num_days: int) -> str:
+def day_delta(num_days: int, format: str = "%Y-%m-%dT%H:%M:%S.%f%z") -> str:
     """
     Returns datetime of now() + num_days
 
@@ -93,7 +93,7 @@ def day_delta(num_days: int) -> str:
     :param num_days: number of days to add to current date time
     :return: datetime formatted as RFC3339
     """
-    return (datetime.datetime.now(datetime.timezone.utc) + datetime.timedelta(days=num_days)).strftime("%Y-%m-%dT%H:%M:%S.%f%z")
+    return (datetime.datetime.now(datetime.timezone.utc) + datetime.timedelta(days=num_days)).strftime(format)
 
 
 def format_datetime(dt: Union[str, datetime.datetime], format: str):

airbyte-cdk/python/unit_tests/sources/declarative/datetime/test_min_max_datetime.py

@@ -94,3 +94,16 @@ def test_set_datetime_format():
     actual_date = min_max_date.get_datetime(custom_fmt_config)
 
     assert actual_date == datetime.datetime.strptime("2022-01-01T20:12:19", "%Y-%m-%dT%H:%M:%S").replace(tzinfo=datetime.timezone.utc)
+
+
+def test_min_max_datetime_lazy_eval():
+    kwargs = {
+        "datetime": "2022-01-10T00:00:00",
+        "datetime_format": "%Y-%m-%dT%H:%M:%S",
+        "min_datetime": "{{ options.min_datetime }}",
+        "max_datetime": "{{ options.max_datetime }}",
+    }
+
+    assert datetime.datetime(2022, 1, 10, 0, 0, tzinfo=datetime.timezone.utc) == MinMaxDatetime(**kwargs, options={}).get_datetime({})
+    assert datetime.datetime(2022, 1, 20, 0, 0, tzinfo=datetime.timezone.utc) == MinMaxDatetime(**kwargs, options={"min_datetime": "2022-01-20T00:00:00"}).get_datetime({})
+    assert datetime.datetime(2021, 1, 1, 0, 0, tzinfo=datetime.timezone.utc) == MinMaxDatetime(**kwargs, options={"max_datetime": "2021-01-01T00:00:00"}).get_datetime({})