* At this point is that the API will somehow send a POST request to the
            external API with the notification of the invoice event
            (e.g. "payment successful").
    """
    # Send the invoice, collect the money, send the notification (the callback)
    return {"msg": "Invoice received"}


app.include_router(subrouter, callbacks=events_callback_router.routes)

    assert response.json()["message"] == "Successful operation."


def test_response_model_has_default_factory_return_model():
    response = client.get("/response_model_has_default_factory_return_model")

    assert response.status_code == 200, response.text

    assert response.json()["code"] == 200

        "paths": {
            "/items/{item_id}": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",

// Init represents the structure.
type Init struct {
	done uint32
	m    sync.Mutex
}

// Do is similar to sync.Once.Do - makes one successful
// call to the function. ie, it invokes the function
// if it is not successful yet.
func (l *Init) Do(f func() error) error {
	if atomic.LoadUint32(&l.done) == 0 {
		return l.do(f)
	}
	return nil
}

func (l *Init) do(f func() error) error {

        @DisplayName("should create empty result")
        void shouldCreateEmptyResult() {
            UpgradeResult result = UpgradeResult.empty();

            assertTrue(result.success(), "Empty result should be successful");
            assertEquals(0, result.processedCount(), "Empty result should have no processed POMs");
            assertEquals(0, result.modifiedCount(), "Empty result should have no modified POMs");

                        },
                        "required": True,
                    },
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",

    "info": {"title": "FastAPI", "version": "0.1.0"},
    "paths": {
        "/app": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {"application/json": {"schema": {}}},
                    }
                },
                "summary": "Read Main",
                "operationId": "read_main_app_get",

                    "summary": "Valid1",
                    "operationId": "valid1_valid1_get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "500": {
                            "description": "Internal Server Error",

                    "summary": "Get Users",
                    "operationId": "get_users_users__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                }
            },
            "/users/{user_id}": {

                            "in": "query",
                        }
                    ],
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",