TST: assert median for timedelta with NaT works (GH8617)

Author: jorisvandenbossche

pandas/tseries/tests/test_timeseries.py

@@ -4400,6 +4400,14 @@ def test_intercept_astype_object(self):
         result = df.values.squeeze()
         self.assertTrue((result[:, 0] == expected.values).all())
 
+    def test_nat_operations(self):
+        # GH 8617
+        s = Series([0, pd.NaT], dtype='m8[ns]')
+        exp = s[0]
+        self.assertEqual(s.median(), exp)
+        self.assertEqual(s.min(), exp)
+        self.assertEqual(s.max(), exp)
+
 
 class TestTimestamp(tm.TestCase):
     def test_class_ops_pytz(self):