add tests, fix axis argument type

Author: yangdanny97

pandas-stubs/core/frame.pyi

@@ -1991,7 +1991,7 @@ class DataFrame(NDFrame, OpsMixin, _GetItemHack):
         fill_method: None = ...,
         freq: DateOffset | dt.timedelta | None = ...,
         *,
-        axis: AxisIndex = ...,
+        axis: Axis = ...,
         fill_value: Scalar | NAType | None = ...,
     ) -> Self: ...
     def pop(self, item: _str) -> Series: ...

tests/test_frame.py

@@ -2428,7 +2428,10 @@ def test_groupby_series_methods() -> None:
 
 def test_dataframe_pct_change() -> None:
     df = pd.DataFrame({"x": [1, 2, 2, 3, 3], "y": [10, 20, 30, 40, 50]})
+    df.pct_change()
     df.pct_change(fill_method=None)
+    df.pct_change(axis="columns", periods=-1)
+    df.pct_change(fill_value=0)
 
 
 def test_indexslice_setitem():