Module rocket4::local

Structures for local dispatching of requests, primarily for testing.

This module allows for simple request dispatching against a local, non-networked instance of Rocket. The primary use of this module is to unit and integration test Rocket applications by crafting requests, dispatching them, and verifying the response.

Usage

This module contains a Client structure that is used to create LocalRequest structures that can be dispatched against a given Rocket instance. Usage is straightforward:

1. Construct a Rocket instance that represents the application.

   let rocket = rocket::ignite();

2. Construct a Client using the Rocket instance.

   let client = Client::new(rocket).expect("valid rocket instance");

3. Construct requests using the Client instance.

   let req = client.get("/");

4. Dispatch the request to retrieve the response.

   let response = req.dispatch();

All together and in idiomatic fashion, this might look like:

use rocket::local::Client;

let client = Client::new(rocket::ignite()).expect("valid rocket");
let response = client.post("/")
    .body("Hello, world!")
    .dispatch();

Unit/Integration Testing

This module can be used to test a Rocket application by constructing requests via Client and validating the resulting response. As an example, consider the following complete “Hello, world!” application, with testing.

#![feature(proc_macro_hygiene, decl_macro)]

#[macro_use] extern crate rocket;

#[get("/")]
fn hello() -> &'static str {
    "Hello, world!"
}

#[cfg(test)]
mod test {
    use super::{rocket, hello};
    use rocket::local::Client;

    #[test]
    fn test_hello_world() {
        // Construct a client to use for dispatching requests.
        let rocket = rocket::ignite().mount("/", routes![hello]);
        let client = Client::new(rocket).expect("valid rocket instance");

        // Dispatch a request to 'GET /' and validate the response.
        let mut response = client.get("/").dispatch();
        assert_eq!(response.body_string(), Some("Hello, world!".into()));
    }
}

Structs

Client

A structure to construct requests for local dispatching.

LocalRequest

A structure representing a local request as created by Client.

LocalResponse

A structure representing a response from dispatching a local request.