bug: reproduce #43659 in test_rename_with_multiindex at Series test.

Author: wojtek2kdev

pandas/tests/generic/test_series.py

@@ -151,3 +151,34 @@ def finalize(self, other, method=None, **kwargs):
         # reset
         Series._metadata = _metadata
         Series.__finalize__ = _finalize  # FIXME: use monkeypatch
+
+    # issue #43659
+    def test_rename_with_multiindex(self):
+        arrays = [
+            ["bar", "bar", "baz", "baz", "foo", "foo", "qux", "qux"],
+            ["one", "two", "one", "two", "one", "two", "one", "two"]
+        ]
+
+        tuples = list(zip(*arrays))
+        index = MultiIndex.from_tuples(tuples, names=["first", "second"])
+        s = Series(np.ones(8), index=index)
+        s.rename(index={'one': 'yes'}, level='second', errors='raise')
+
+        arrays_expected = [
+            ["bar", "bar", "baz", "baz", "foo", "foo", "qux", "qux"],
+            ["yes", "two", "yes", "two", "yes", "two", "yes", "two"]
+        ]
+
+        tuples_expected = list(zip(*arrays_expected))
+        index_expected = MultiIndex.from_tuples(
+            tuples_expected, 
+            names=["first", "second"]
+        )
+        s_expected = Series(np.ones(8), index=index_expected)
+
+        assert s == s_expected
+
+
+
+
+