dte: Improve validation error message in DteXmlData.referencias

src/cl_sii/dte/data_models.py

@@ -811,7 +811,13 @@ def validate_referencias_numero_linea_ref_order(cls, v: object) -> object:
         if isinstance(v, Sequence):
             for idx, referencia in enumerate(v, start=1):
                 if referencia.numero_linea_ref != idx:
-                    raise ValueError("items must be ordered according to their 'numero_linea_ref'")
+                    raise ValueError(
+                        "items must be ordered according to their 'numero_linea_ref'. "
+                        f"Expected index value: {idx}, "
+                        f"actual numero linea ref: {referencia.numero_linea_ref}. "
+                        f"All numero_linea_refs: "
+                        f"{', '.join(str(ref.numero_linea_ref) for ref in v)}"
+                    )
         return v
 
     @pydantic.model_validator(mode='after')

src/tests/test_dte_data_models.py

@@ -1699,7 +1699,11 @@ def test_validate_referencias_numero_linea_ref_order(self) -> None:
         expected_validation_errors = [
             {
                 'loc': ('referencias',),
-                'msg': "Value error, items must be ordered according to their 'numero_linea_ref'",
+                'msg': (
+                    "Value error, items must be ordered according to their 'numero_linea_ref'. "
+                    "Expected index value: 1, actual numero linea ref: 2. "
+                    "All numero_linea_refs: 2, 1"
+                ),
                 'type': 'value_error',
             },
         ]