Fix undelta repr so it works with eval()

Author: rlskoeser

src/undate/__init__.py

@@ -1,7 +1,14 @@
 __version__ = "0.6.0.dev0"
 
-from undate.date import DatePrecision
+from undate.date import DatePrecision, UnDelta
 from undate.undate import Undate, Calendar
 from undate.interval import UndateInterval
 
-__all__ = ["Undate", "UndateInterval", "Calendar", "DatePrecision", "__version__"]
+__all__ = [
+    "Undate",
+    "UndateInterval",
+    "Calendar",
+    "DatePrecision",
+    "UnDelta",
+    "__version__",
+]

src/undate/date.py

@@ -145,7 +145,7 @@ def __init__(self, *days: int):
     def __repr__(self):
         # customize string representation  for simpler notation; default
         # specifies full UnInt initialization with upper and lower keywords
-        return f"{self.__class__.__name__}(days=[{self.days.lower},{self.days.upper}])"
+        return f"undate.{self.__class__.__name__}({self.days.lower},{self.days.upper})"
 
     def __eq__(self, other: object) -> bool:
         # is an uncertain duration ever *equal* another, even if the values are the same?

tests/test_date.py

@@ -230,8 +230,20 @@ def test_init_validation(self):
             UnDelta(10)
 
     def test_repr(self):
-        # customized string representation
-        assert repr(UnDelta(28, 29)) == "UnDelta(days=[28,29])"
+        # test customized string representation
+
+        # import undate to test eval of fully-qualified repr string
+        import undate  # noqa: F401
+
+        feb_undelt = UnDelta(28, 29)
+        assert repr(feb_undelt) == "undate.UnDelta(28,29)"
+        # can't compare directly because uncertain deltas aren't equal,
+        # but compare vlaues
+        assert eval(repr(feb_undelt.days.lower)) == feb_undelt.days.lower
+        assert eval(repr(feb_undelt.days.upper)) == feb_undelt.days.upper
+
+        larger_undelt = UnDelta(10, 12, 14, 16)
+        assert repr(larger_undelt) == "undate.UnDelta(10,16)"
 
     def test_eq(self):
         # uncertain deltas are not equivalent