TST: Add test for apply cast types GH#9506

Signed-off-by: Liang Yan <[email protected]>

Author: liang3zy22

pandas/tests/apply/test_series_apply.py

@@ -271,6 +271,18 @@ def test_apply_empty_integer_series_with_datetime_index(by_row):
     tm.assert_series_equal(result, s)
 
 
+def test_apply_dataframe_iloc():
+    uintDF = DataFrame(np.uint64([1, 2, 3, 4, 5]), columns=["Numbers"])
+    indexDF = DataFrame([2, 3, 2, 1, 2], columns=["Indices"])
+
+    def retrieve(targetRow, targetDF):
+        val = targetDF["Numbers"].iloc[targetRow]
+        return val
+
+    resultDF = indexDF["Indices"].apply(retrieve, args=(uintDF,))
+    assert resultDF.dtypes == "uint64"
+
+
 def test_transform(string_series, by_row):
     # transforming functions