Check error raised with wrong length cat insertion

Author: ryankarlos

pandas/tests/frame/test_dtypes.py

@@ -724,6 +724,13 @@ def test_astype_duplicate_col(self):
         expected = concat([a1_str, b, a2_str], axis=1)
         tm.assert_frame_equal(result, expected)
 
+    def test_wrong_length_cat_dtype_raises(self):
+        cat = pd.Categorical.from_codes([0, 1, 1, 0, 1, 2], ["a", "b", "c"])
+        df = pd.DataFrame({"bar": range(10)})
+        err = "Length of values does not match length of index"
+        with pytest.raises(ValueError, match=err):
+            df["foo"] = cat
+
     @pytest.mark.parametrize(
         "dtype",
         [