def test_router_a():
    with client:
        response = client.get("/a")
    assert response.json() == {"msg": "Hello A"}
    assert response.headers["content-type"] == json_type


def test_router_a_override():
    with client:
        response = client.get("/a/override")
    assert response.content == b"Hello A"
    assert response.headers["content-type"] == text_type


def test_router_a_a():