Update test suite to drop database automatically when test is successfull

tests/api/unsubscribe_confirm.rs

@@ -1,9 +1,10 @@
 use crate::helpers::{TestApp, when_sending_an_email};
+use sqlx::PgPool;
 use wiremock::ResponseTemplate;
 
-#[tokio::test]
-async fn unsubscribe_form_sends_a_valid_link_if_email_is_in_database() {
-    let app = TestApp::spawn().await;
+#[sqlx::test]
+async fn unsubscribe_form_sends_a_valid_link_if_email_is_in_database(connection_pool: PgPool) {
+    let app = TestApp::spawn(connection_pool).await;
     app.create_confirmed_subscriber().await;
 
     when_sending_an_email()
@@ -48,9 +49,9 @@ async fn unsubscribe_form_sends_a_valid_link_if_email_is_in_database() {
     assert!(html_fragment.contains("Good bye, friend"));
 }
 
-#[tokio::test]
-async fn an_invalid_email_is_ignored() {
-    let app = TestApp::spawn().await;
+#[sqlx::test]
+async fn an_invalid_email_is_ignored(connection_pool: PgPool) {
+    let app = TestApp::spawn(connection_pool).await;
     app.create_confirmed_subscriber().await;
 
     when_sending_an_email()