Rocket - Hello World with separate test file

---

• Create a new crate, add rocket as a dependency cargo add rocket

examples/rocket/hello-world-external-test-file/Cargo.toml

[package]
name = "first"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rocket = "0.5.0"

examples/rocket/hello-world-external-test-file/src/main.rs

#[macro_use]
extern crate rocket;

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

#[launch]
fn rocket() -> _ {
    rocket::build().mount("/", routes![index])
}

#[cfg(test)]
mod tests;

cargo run

The tests

examples/rocket/hello-world-external-test-file/src/tests.rs

use rocket::http::Status;
use rocket::local::blocking::Client;

#[test]
fn hello_world() {
    let client = Client::tracked(super::rocket()).unwrap();
    let response = client.get("/").dispatch();

    assert_eq!(response.status(), Status::Ok);
    assert_eq!(
        response.headers().get_one("Content-Type").unwrap(),
        "text/plain; charset=utf-8"
    );
    assert_eq!(response.into_string(), Some("Hello, world!".into()));
}

cargo test

curl -i http://localhost:8000/