Fails with 500 error when returning HTTPStatus and default response is configured

[chbndrhnns]

Description

Connexion accepts return statements like return {}, HTTPStatus.CREATED but it fails with 500 error if response validation is enabled and if there is a default response with required fields configured in the schema.

Expected behaviour

Just use HTTPStatus members like integers

Actual behaviour

See above.

Steps to reproduce

from http import HTTPStatus

import pytest
from connexion import AsyncApp


async def fails():
    return {"data": []}, HTTPStatus.CREATED


async def ok():
    return {"data": []}, 201


@pytest.fixture
def app():
    app = AsyncApp(__name__)
    app.add_api(
        validate_responses=True,
        specification={
            "openapi": "3.0.0",
            "info": {"title": "test", "version": "v1"},
            "paths": {
                "/fails": {
                    "get": {
                        "x-openapi-router-controller": __name__,
                        "operationId": "fails",
                        "responses": {
                            "201": {
                                "description": "ok",
                            },
                            "default": {
                                "description": "default",
                                "content": {
                                    "application/json": {
                                        "schema": {
                                            "type": "object",
                                            "properties": {
                                                "error_code": {"type": "integer"},
                                            },
                                            "required": ["error_code"],
                                        },
                                    }
                                },
                            },
                        },
                    }
                },
                "/ok": {
                    "get": {
                        "x-openapi-router-controller": __name__,
                        "operationId": "ok",
                        "responses": {
                            "201": {
                                "description": "ok",
                            }
                        },
                    }
                },
            },
        },
    )
    return app


def test_ok(app):
    with app.test_client() as client:
        res = client.get("/ok")
        assert res.status_code == HTTPStatus.CREATED


def test_fails(app):
    # SHOULD NOT FAIL
    with app.test_client() as client:
        res = client.get("/fails")
        assert res.status_code == HTTPStatus.CREATED

Additional info:

Output of the commands:

• python --version: 3.9.16
• pip show connexion | grep "^Version\:": 3.0.6