wip

Author: MarcoGorelli

pandas/tests/frame/indexing/test_coercion.py

@@ -49,35 +49,19 @@ def test_loc_setitem_multiindex_columns(self, consolidate):
 def test_37477():
     # fixed by GH#45121
     orig = DataFrame({"A": [1, 2, 3], "B": [3, 4, 5]})
-    expected = DataFrame({"A": [1, 2, 3], "B": [3, 1.2, 5]})
 
     df = orig.copy()
-    with tm.assert_produces_warning(
-        FutureWarning, match="Setting an item of incompatible dtype"
-    ):
+    with pytest.raises(TypeError, match="Invalid value"):
         df.at[1, "B"] = 1.2
-    tm.assert_frame_equal(df, expected)
 
-    df = orig.copy()
-    with tm.assert_produces_warning(
-        FutureWarning, match="Setting an item of incompatible dtype"
-    ):
+    with pytest.raises(TypeError, match="Invalid value"):
         df.loc[1, "B"] = 1.2
-    tm.assert_frame_equal(df, expected)
 
-    df = orig.copy()
-    with tm.assert_produces_warning(
-        FutureWarning, match="Setting an item of incompatible dtype"
-    ):
+    with pytest.raises(TypeError, match="Invalid value"):
         df.iat[1, 1] = 1.2
-    tm.assert_frame_equal(df, expected)
 
-    df = orig.copy()
-    with tm.assert_produces_warning(
-        FutureWarning, match="Setting an item of incompatible dtype"
-    ):
+    with pytest.raises(TypeError, match="Invalid value"):
         df.iloc[1, 1] = 1.2
-    tm.assert_frame_equal(df, expected)
 
 
 def test_6942(indexer_al):