add a test for loc method; check if a warning raise when replacing a … (#36486)

Author: samilAyoub

pandas/tests/indexing/test_chaining_and_caching.py

@@ -335,12 +335,14 @@ def test_setting_with_copy_bug(self):
         # this should not raise
         df2["y"] = ["g", "h", "i"]
 
-    def test_detect_chained_assignment_warnings(self):
+    def test_detect_chained_assignment_warnings_errors(self):
+        df = DataFrame({"A": ["aaa", "bbb", "ccc"], "B": [1, 2, 3]})
         with option_context("chained_assignment", "warn"):
-            df = DataFrame({"A": ["aaa", "bbb", "ccc"], "B": [1, 2, 3]})
-
             with tm.assert_produces_warning(com.SettingWithCopyWarning):
                 df.loc[0]["A"] = 111
+        with option_context("chained_assignment", "raise"):
+            with pytest.raises(com.SettingWithCopyError):
+                df.loc[0]["A"] = 111
 
     def test_detect_chained_assignment_warnings_filter_and_dupe_cols(self):
         # xref gh-13017.