added test_intersection_contains

Author: davidduenas3

tests/unit/date/test_daterange.py

@@ -234,3 +234,19 @@ def test_intersection_preserves_boundaries():
     assert DateRange('20110101', '20110102', OPEN_OPEN) == DateRange('20110101', '20110102', CLOSED_OPEN).intersection(DateRange('20110101', '20110102', OPEN_OPEN))
     assert DateRange('20110101', '20110102', OPEN_OPEN) == DateRange('20110101', '20110102', OPEN_OPEN).intersection(DateRange('20110101', '20110102', OPEN_CLOSED))
 
+
+def test_intersection_contains():
+    # assert ((d in dr1) & (d in dr2)) == (d in (dr1 & dr2)) for any interval combination 
+    start, end = dt(2018,1,1), dt(2018,1,2)
+    date_ranges = [DateRange(start, end, interval) for interval in CLOSED_CLOSED.__class__]
+    
+    def equal_contains(date,dr1,dr2):
+        return ((date in dr1) and (date in dr2)) == (date in dr1.intersection(dr2))
+   
+    assert all(equal_contains(start,dr1,dr2) for dr1 in date_ranges for dr2 in date_ranges)
+    assert all(equal_contains(end,dr1,dr2) for dr1 in date_ranges for dr2 in date_ranges)
+    
+   
+   
+   
+