create unit version of recursion test

Author: TrevorBergeron

tests/system/small/test_dataframe.py

@@ -5778,6 +5778,7 @@ def test_recursion_limit(scalars_df_index):
         else:
             print("resource module not available")
         raise
+    assert False
 
 
 @pytest.mark.skipif(

tests/unit/test_dataframe_polars.py

@@ -4450,3 +4450,30 @@ def test_dataframe_explode_reserve_order(session, ignore_index, ordered):
 def test_dataframe_explode_xfail(col_names):
     df = bpd.DataFrame({"A": [[0, 1, 2], [], [3, 4]]})
     df.explode(col_names)
+
+
+def test_recursion_limit_unit(scalars_df_index):
+    import sys
+
+    print(f"doing recursion test, recursion limit set to {sys.getrecursionlimit()}")
+    scalars_df_index = scalars_df_index[["int64_too", "int64_col", "float64_col"]]
+    for i in range(400):
+        scalars_df_index = scalars_df_index + 4
+    try:
+        scalars_df_index.to_pandas()
+    except Exception:
+
+        try:
+            import resource
+        except ImportError:
+            # resource is only available on Unix-like systems.
+            # https://docs.python.org/3/library/resource.html
+            resource = None  # type: ignore
+        print(f"recursion limit: {sys.getrecursionlimit()}")
+        if resource is not None:
+            soft_limit, hard_limit = resource.getrlimit(resource.RLIMIT_STACK)
+            print(f"stack limits: {soft_limit}, {hard_limit}")
+        else:
+            print("resource module not available")
+        raise
+    assert False