feat(test): health_check route

Cargo.toml

@@ -5,4 +5,14 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[lib]
+path = "src/lib.rs"
+
+[[bin]]
+path = "src/main.rs"
+name = "email_newsletter_api"
+
 [dependencies]
+actix-web = "4.5.1"
+reqwest = "0.12.2"
+tokio = { version = "1.36.0", features = ["full"] }

src/lib.rs

@@ -0,0 +1,16 @@
+use actix_web::{web, App, HttpResponse, HttpServer, Responder};
+
+async fn healthcheck_route() -> impl Responder{
+    return HttpResponse::Ok().finish()
+}
+
+
+pub async fn run() -> Result<(), std::io::Error>{
+    HttpServer::new(||{
+        App::new()
+        .route("/healthcheck", web::get().to(healthcheck_route))
+    })
+    .bind("127.0.0.1:8000")?
+    .run()
+    .await
+}

src/main.rs

@@ -1,3 +1,6 @@
-fn main() {
-    println!("Hello, world!");
+use email_newsletter_api::run;
+
+#[tokio::main]
+async fn main() -> Result<(), std::io::Error>{
+    run().await
 }

tests/health_check.rs

@@ -0,0 +1,15 @@
+#[tokio::test]
+async fn health_check_works(){
+    spawn_app().await.expect("Failed to spawn our app.");
+
+    let client = reqwest::Client::new();
+
+    let response = client.get("http://127.0.0.1:8000/health_check").send().await.expect("Failed to execute health_check request.");
+
+    assert!(response.status().is_success());
+    assert_eq!(Some(0), response.content_length());
+}
+
+async fn spawn_app() -> Result<(), std::io::Error> {
+    email_newsletter_api::run().await
+}