Add in framework for post requests for user subscriptions

Complete up to page 45

Cargo.lock

@@ -754,6 +754,7 @@ dependencies = [
  "actix-rt",
  "actix-web",
  "reqwest",
+ "serde",
  "tokio",
 ]
 

Cargo.toml

@@ -9,6 +9,7 @@ path = "src/lib.rs"
 
 [dependencies]
 actix-web = "4.0.0-beta.8"
+serde = { version = "1", features = ["derive"]}
 
 [dev-dependencies]
 actix-rt = "2"

src/lib.rs

@@ -6,10 +6,21 @@ async fn health_check() -> HttpResponse {
     HttpResponse::Ok().finish()
 }
 
+#[derive(serde::Deserialize)]
+struct FormData {
+    email: String,
+    name: String
+}
+
+async fn subscribe(_form: web::Form<FormData>) -> HttpResponse {
+    HttpResponse::Ok().finish()
+}
+
 pub fn run(listener: TcpListener) -> Result<Server, std::io::Error> {
     let server = HttpServer::new(|| {
         App::new()
             .route("/health_check", web::get().to(health_check))
+            .route("/subscriptions", web::post().to(subscribe))
     })
     .listen(listener)?
     .run();

tests/health_check.rs

@@ -1,5 +1,17 @@
 use std::net::TcpListener;
 
+// Create new instance of the application on a random port and return address [`http://localhost:XXXX`]
+fn spawn_app() -> String {
+    let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind to random port");
+    let port = listener.local_addr().unwrap().port();
+
+    let server = mail_app::run(listener).expect("Failed to bind address");
+
+    let _ = tokio::spawn(server);
+
+    format!("http://127.0.0.1:{}", port)
+}
+
 #[actix_rt::test]
 async fn health_check_works() {
     // Arrange
@@ -19,13 +31,53 @@ async fn health_check_works() {
     assert_eq!(Some(0), response.content_length());
 }
 
-fn spawn_app() -> String {
-    let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind to random port");
-    let port = listener.local_addr().unwrap().port();
+#[actix_rt::test]
+async fn subscribe_returns_200_for_valid_form_data() {
+    // Arrange
+    let app_address = spawn_app();
+    let client = reqwest::Client::new();
+    let body = "name=le%20guin&email=usrula_le_guin%40gmail.com";
 
-    let server = mail_app::run(listener).expect("Failed to bind address");
+    // Act
+    let response = client
+        .post(&format!("{}/subscriptions", &app_address))
+        .header("Content-Type", "application/x-www-form-urlencoded")
+        .body(body)
+        .send()
+        .await
+        .expect("Failed to execute request.");
 
-    let _ = tokio::spawn(server);
-
-    format!("http://127.0.0.1:{}", port)
+    // Assert test
+    assert_eq!(200, response.status().as_u16());
+}
+
+#[actix_rt::test]
+async fn subscrib_returns_400_for_missing_form_data() {
+    //Arrange
+    let app_address = spawn_app();
+    let client = reqwest::Client::new();
+    let test_cases = vec![
+        ("name=le%20guin", "missing the email"),
+        ("email=ursula_le_guin%40gmail.com", "missing the name"),
+        ("", "missing both name and email")
+    ];
+
+    for (invalid_body, error_message) in test_cases {
+        // Act
+        let response = client
+            .post(&format!("{}/subscriptions", &app_address))
+            .header("Content-Type", "application/x-www-form-urlencoded")
+            .body(invalid_body)
+            .send()
+            .await
+            .expect("Failed to execute request.");
+
+        // Assert
+        assert_eq!(
+            400,
+            response.status().as_u16(),
+            // Customised error message on test failure
+            "The API did not fail with 400 Bad Request when the payload was {}.", error_message
+        );
+    }
 }