remove cast

Author: Rohan Jain

pandas/tests/extension/test_arrow.py

@@ -3261,6 +3261,15 @@ def test_arrow_floordiv_larger_divisor():
     tm.assert_series_equal(result, expected)
 
 
+def test_arrow_floordiv_common_type():
+    # GH 55561
+    a = pd.Series([-128], dtype="int8[pyarrow]")
+    b = pd.Series([-1], dtype="int64[pyarrow]")
+    expected = pd.Series([128], dtype="int64[pyarrow]")
+    result = a // b
+    tm.assert_series_equal(result, expected)
+
+
 def test_arrow_floordiv_integral_invalid():
     # GH 56676
     a = pd.Series([-9223372036854775808], dtype="int64[pyarrow]")