Restructure folders (#411)

basics/hello-world/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "hello-world"
+version = "2.0.0"
+authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+actix-web = "3"
+env_logger = "0.8"
+
+[dev-dependencies]
+actix-rt = "1"

basics/hello-world/src/main.rs

@@ -0,0 +1,50 @@
+use actix_web::{middleware, web, App, HttpRequest, HttpServer};
+
+async fn index(req: HttpRequest) -> &'static str {
+    println!("REQ: {:?}", req);
+    "Hello world!"
+}
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    std::env::set_var("RUST_LOG", "actix_web=info");
+    env_logger::init();
+
+    HttpServer::new(|| {
+        App::new()
+            // enable logger
+            .wrap(middleware::Logger::default())
+            .service(web::resource("/index.html").to(|| async { "Hello world!" }))
+            .service(web::resource("/").to(index))
+    })
+    .bind("127.0.0.1:8080")?
+    .run()
+    .await
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use actix_web::dev::Service;
+    use actix_web::{http, test, web, App, Error};
+
+    #[actix_rt::test]
+    async fn test_index() -> Result<(), Error> {
+        let app = App::new().route("/", web::get().to(index));
+        let mut app = test::init_service(app).await;
+
+        let req = test::TestRequest::get().uri("/").to_request();
+        let resp = app.call(req).await.unwrap();
+
+        assert_eq!(resp.status(), http::StatusCode::OK);
+
+        let response_body = match resp.response().body().as_ref() {
+            Some(actix_web::body::Body::Bytes(bytes)) => bytes,
+            _ => panic!("Response error"),
+        };
+
+        assert_eq!(response_body, r##"Hello world!"##);
+
+        Ok(())
+    }
+}