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use std::{
env::args,
io::{stdin, stdout, IsTerminal},
};
use actix_web::{
get, http::header::ContentType, post, web, App, HttpResponse, HttpServer, Responder,
};
use serde::{Deserialize, Serialize};
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
struct Registration {
url: String,
}
trait IdGenerator {
fn next_id(&self) -> String;
}
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
enum RegistrationResult {
Success(RegistrationSuccess),
}
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
struct RegistrationSuccess {
id: String,
url: String,
}
#[post("/register")]
async fn register(
id_gen: web::Data<dyn IdGenerator>,
registration: web::Json<Registration>,
) -> impl Responder {
let id = id_gen.next_id();
let success = RegistrationSuccess {
id,
url: registration.url.clone(),
};
HttpResponse::Ok()
.content_type(ContentType::json())
.body(serde_json::to_string(&RegistrationResult::Success(success)).unwrap())
}
#[actix_web::main]
async fn main() -> std::io::Result<()> {
HttpServer::new(|| App::new().service(register))
.bind(("127.0.0.1", 8080))?
.run()
.await
}
#[cfg(test)]
mod app_tests {
use std::sync::Arc;
use actix_web::{body, http::header::ContentType, middleware::Logger, test, App};
use super::*;
struct ConstantIdGenerator {
id: String,
}
impl ConstantIdGenerator {
fn new(id: String) -> Self {
Self { id }
}
}
impl IdGenerator for ConstantIdGenerator {
fn next_id(&self) -> String {
self.id.clone()
}
}
#[actix_web::test]
async fn post_registration_returns_success_with_unique_id() {
let id = "0123456789abcdef0123456789abcdef".to_string();
let id_generator: Arc<dyn IdGenerator> = Arc::new(ConstantIdGenerator::new(id.clone()));
env_logger::init();
let logger = Logger::default();
let data = web::Data::from(id_generator);
let app =
test::init_service(App::new().wrap(logger).app_data(data).service(register)).await;
let url = "http://192.168.1.1".to_string();
let req = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
let resp = test::call_service(&app, req).await;
assert!(resp.status().is_success());
let body = resp.into_body();
let bytes = body::to_bytes(body).await;
assert_eq!(
RegistrationResult::Success(RegistrationSuccess { id, url }),
serde_json::from_slice(&bytes.unwrap()).unwrap()
);
}
}
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