Add new test.

src/routes/subscriptions.rs

@@ -45,20 +45,21 @@ pub async fn subscribe(
         .await
         .map_err(|_| HttpResponse::InternalServerError().finish())?;
     // We are swallowing the error for the time being.
-    let _ = send_confirmation_email(&email_client, new_subscriber, &base_url.0).await;
+    let _ = send_confirmation_email(&email_client, new_subscriber, &base_url.0, "mytoken").await;
     Ok(HttpResponse::Ok().finish())
 }
 
 #[tracing::instrument(
     name = "Send a confirmation email to a new subscriber",
-    skip(email_client, new_subscriber, base_url)
+    skip(email_client, new_subscriber, base_url, subscription_token)
 )]
 pub async fn send_confirmation_email(
     email_client: &EmailClient,
     new_subscriber: NewSubscriber,
     base_url: &str,
+    subscription_token: &str
 ) -> Result<(), reqwest::Error> {
-    let confirmation_link = format!("{}/subscriptions/confirm?subscription_token=mytoken", base_url);
+    let confirmation_link = format!("{}/subscriptions/confirm?subscription_token={}", base_url, subscription_token);
     let plain_body = format!(
         "Welcome to our newsletter!\nVisit {} to confirm your subscription.",
         confirmation_link

tests/api/subscriptions_confirm.rs

@@ -41,3 +41,36 @@ async fn the_link_returned_by_subscribe_returns_a_200_if_called() {
     assert_eq!(response.status().as_u16(), 200);
 }
 
+#[actix_rt::test]
+async fn clicking_on_the_confirmation_link_confirms_a_subscriber() {
+    // Arrange
+    let app = spawn_app().await;
+    let body = "name=le%20guin&email=ursula_le_guin%40gmail.com";
+
+    Mock::given(path("/email"))
+        .and(method("POST"))
+        .respond_with(ResponseTemplate::new(200))
+        .mount(&app.email_server)
+        .await;
+
+    app.post_subscriptions(body.into()).await;
+    let email_request = &app.email_server.received_requests().await.unwrap()[0];
+    let confirmation_links = app.get_confirmation_links(&email_request);
+
+    // Act
+    reqwest::get(confirmation_links.html)
+        .await
+        .unwrap()
+        .error_for_status()
+        .unwrap();
+
+    // Assert
+    let saved = sqlx::query!("SELECT email, name, status FROM subscriptions",)
+        .fetch_one(&app.db_pool)
+        .await
+        .expect("Failed to fetch saved subscription.");
+
+    assert_eq!(saved.email, "ursula_le_guin@gmail.com");
+    assert_eq!(saved.name, "le guin");
+    assert_eq!(saved.status, "confirmed");
+}