TST: Add test_datetime_object_multiindex test (#52913)

add test_datetime_object_multiindex test

Author: shteken

pandas/tests/test_multilevel.py

@@ -1,3 +1,5 @@
+import datetime
+
 import numpy as np
 import pytest
 
@@ -266,6 +268,28 @@ def test_subsets_multiindex_dtype(self):
         result = df.a.b.dtypes
         tm.assert_series_equal(result, expected)
 
+    def test_datetime_object_multiindex(self):
+        data_dic = {
+            (0, datetime.date(2018, 3, 3)): {"A": 1, "B": 10},
+            (0, datetime.date(2018, 3, 4)): {"A": 2, "B": 11},
+            (1, datetime.date(2018, 3, 3)): {"A": 3, "B": 12},
+            (1, datetime.date(2018, 3, 4)): {"A": 4, "B": 13},
+        }
+        result = DataFrame.from_dict(data_dic, orient="index")
+        data = {"A": [1, 2, 3, 4], "B": [10, 11, 12, 13]}
+        index = [
+            [0, 0, 1, 1],
+            [
+                datetime.date(2018, 3, 3),
+                datetime.date(2018, 3, 4),
+                datetime.date(2018, 3, 3),
+                datetime.date(2018, 3, 4),
+            ],
+        ]
+        expected = DataFrame(data=data, index=index)
+
+        tm.assert_frame_equal(result, expected)
+
 
 class TestSorted:
     """everything you wanted to test about sorting"""