TST: consistency of indexing with a tz-aware scalar

xref pandas-dev#12938

Author: jreback

pandas/tests/indexing/test_datetime.py

@@ -63,6 +63,37 @@ def f():
         df.loc[df.new_col == 'new', 'time'] = v
         tm.assert_series_equal(df.loc[df.new_col == 'new', 'time'], v)
 
+    def test_consistency_with_tz_aware_scalar(self):
+        # xef gh-12938
+        # various ways of indexing the same tz-aware scalar
+        df = Series([Timestamp('2016-03-30 14:35:25',
+                               tz='Europe/Brussels')]).to_frame()
+
+        df = pd.concat([df, df]).reset_index(drop=True)
+        expected = Timestamp('2016-03-30 14:35:25+0200',
+                             tz='Europe/Brussels')
+
+        result = df[0][0]
+        assert result == expected
+
+        result = df.iloc[0, 0]
+        assert result == expected
+
+        result = df.loc[0, 0]
+        assert result == expected
+
+        result = df.iat[0, 0]
+        assert result == expected
+
+        result = df.at[0, 0]
+        assert result == expected
+
+        result = df[0].loc[0]
+        assert result == expected
+
+        result = df[0].at[0]
+        assert result == expected
+
     def test_indexing_with_datetimeindex_tz(self):
 
         # GH 12050