FIX-#7465: Properly implement Series.rename_axis

Signed-off-by: Jonathan Shi <jonathan.shi@snowflake.com>

Author: sfc-gh-joshi

modin/pandas/series.py

@@ -1702,6 +1702,30 @@ def rename_axis(
             mapper=mapper, index=index, axis=axis, copy=copy, inplace=inplace
         )
 
+    def _set_axis_name(self, name, axis=0, inplace=False) -> Union[Series, None]:
+        """
+        Alter the name of the axis.
+
+        Parameters
+        ----------
+        name : str
+            Name for the Series.
+        axis : str or int, default: 0
+            The axis to set the label.
+            Only 0 is valid for Series.
+        inplace : bool, default: False
+            Whether to modify `self` directly or return a copy.
+
+        Returns
+        -------
+        Series or None
+        """
+        axis = self._get_axis_number(axis)  # raises ValueError if not 0
+        renamed = self if inplace else self.copy()
+        renamed.index = renamed.index.set_names(name)
+        if not inplace:
+            return renamed
+
     def rename(
         self,
         index=None,

modin/tests/pandas/test_series.py

@@ -5188,3 +5188,20 @@ def test_logical_binary_with_list(op):
     result_md = getattr(series_md, op)(rhs)
     result_pd = getattr(series_pd, op)(rhs)
     df_equals(result_md, result_pd)
+
+
+def test_rename_axis():
+    series_md, series_pd = create_test_series([0, 1, 2])
+    renamed_md = series_md.rename_axis("name")
+    renamed_pd = series_pd.rename_axis("name")
+    assert series_md.index.name is None
+    df_equals(renamed_md, renamed_pd)
+    series_md.rename_axis("name", inplace=True)
+    series_pd.rename_axis("name", inplace=True)
+    df_equals(series_md, series_pd)
+    # axis=1 is invalid for series
+    try:
+        series_pd.rename_axis("name", 1)
+    except Exception as err:
+        with pytest.raises(type(err)):
+            series_md.rename_axis("name", 1)