doubling time is now validated

Author: quinn-dougherty

src/penn_chime/parameters.py

@@ -90,7 +90,7 @@ def __init__(
         self.current_date = Date(value=current_date)
 
         self.date_first_hospitalized = OptionalDate(value=date_first_hospitalized)
-        self.doubling_time = doubling_time
+        self.doubling_time = OptionalStrictlyPositive(value=doubling_time)
 
         self.infectious_days = StrictlyPositive(value=infectious_days)
         self.market_share = Rate(value=market_share)

src/penn_chime/validators/__init__.py

@@ -10,3 +10,5 @@
 Rate = Rate()  # type: ignore
 Date = Date()  # type: ignore
 OptionalDate = OptionalDate()  # type: ignore
+# # rolling a custom validator for doubling time in case DS wants to add upper bound
+# DoublingTime = OptionalBounded(lower_bound=0-EPSILON, upper_bound=None)