Fault-tolerant delivery system

src/email_client.rs

@@ -11,16 +11,17 @@ pub struct EmailClient {
 }
 
 impl EmailClient {
-    pub fn new(config: EmailClientSettings) -> Self {
-        Self {
+    pub fn build(config: EmailClientSettings) -> Result<Self, anyhow::Error> {
+        let client = Self {
             http_client: Client::builder()
                 .timeout(Duration::from_millis(config.timeout_milliseconds))
                 .build()
                 .unwrap(),
-            base_url: reqwest::Url::parse(&config.base_url).unwrap(),
-            sender: config.sender().unwrap(),
+            base_url: reqwest::Url::parse(&config.base_url)?,
+            sender: config.sender().map_err(|e| anyhow::anyhow!(e))?,
             authorization_token: config.authorization_token,
-        }
+        };
+        Ok(client)
     }
 
     pub async fn send_email(
@@ -125,7 +126,7 @@ mod tests {
         let sender_email = SafeEmail().fake();
         let token: String = Faker.fake();
         let settings = EmailClientSettings::new(base_url, sender_email, token, 200);
-        EmailClient::new(settings)
+        EmailClient::build(settings).unwrap()
     }
 
     #[tokio::test]