# Issue 17046

#
#    modified: /pandas/tests/indexes/test_base.py,
#              /doc/source/whatsnew/v0.21.0.txt
#
# Include both '>' and '<' in the error message in
# TestMixedIntIndex.test_argsort and
# TestMixedIntIndex.test_numpy_argsort

Author: ysau

doc/source/whatsnew/v0.21.0.txt

@@ -259,6 +259,7 @@ Indexing
 - Fixes bug where indexing with ``np.inf`` caused an ``OverflowError`` to be raised (:issue:`16957`)
 - Bug in reindexing on an empty ``CategoricalIndex`` (:issue:`16770`)
 - Fixes ``DataFrame.loc`` for setting with alignment and tz-aware ``DatetimeIndex`` (:issue:`16889`)
+- Fixes ``test_argsort``, ``test_numpy_argsort`` to cover both `>` and `<` in the error message (:issue:`17046`)
 
 I/O
 ^^^

pandas/tests/indexes/test_base.py

@@ -1846,7 +1846,7 @@ def create_index(self):
     def test_argsort(self):
         idx = self.create_index()
         if PY36:
-            with tm.assert_raises_regex(TypeError, "'>' not supported"):
+            with tm.assert_raises_regex(TypeError, "'>|<' not supported"):
                 result = idx.argsort()
         elif PY3:
             with tm.assert_raises_regex(TypeError, "unorderable types"):
@@ -1859,7 +1859,7 @@ def test_argsort(self):
     def test_numpy_argsort(self):
         idx = self.create_index()
         if PY36:
-            with tm.assert_raises_regex(TypeError, "'>' not supported"):
+            with tm.assert_raises_regex(TypeError, "'>|<' not supported"):
                 result = np.argsort(idx)
         elif PY3:
             with tm.assert_raises_regex(TypeError, "unorderable types"):