message = "Message one"
            websocket.send_text(message)
            data = websocket.receive_text()
            assert data == f"Message text was: {message}"
            message = "Message two"
            websocket.send_text(message)
            data = websocket.receive_text()

    response = client.post(
        "/invoices/", json={"id": "fooinvoice", "customer": "John", "total": 5.3}
    )
    assert response.status_code == 200, response.text
    assert response.json() == {"msg": "Invoice received"}


def test_dummy_callback():
    # Just for coverage
    invoice_notification({})


def test_openapi_schema():
    response = client.get("/openapi.json")