feat(test): connecting to PostgreSQL

- rename the database name in the configuration.yaml

configuration.yaml

@@ -4,4 +4,4 @@ database:
   port: 5432
   username: "postgres"
   password: "password"
-  database_name: "email_newsletter_api"
+  database_name: "newsletter"

src/configuration.rs

@@ -23,3 +23,12 @@ pub fn get_configuration() -> Result<Settings, config::ConfigError> {
 
     settings.try_deserialize::<Settings>()
 }
+
+impl DatabaseSettings {
+    pub fn connection_string(&self) -> String {
+        format!(
+            "postgres://{}:{}@{}:{}/{}",
+            self.username, self.password, self.host, self.port, self.database_name
+        )
+    }
+}

tests/subscribe.rs

@@ -2,10 +2,21 @@ mod test_utils;
 
 use test_utils::spawn_app;
 
+use email_newsletter_api::configuration::{self, get_configuration};
+use sqlx::{Connection, PgConnection};
+
 #[tokio::test]
 async fn subscribe_returns_a_200_for_valid_form_data() {
     let server_address = spawn_app();
 
+    let configuration = get_configuration().expect("Failed to read configuration");
+
+    let postgres_connection_string = configuration.database.connection_string();
+
+    let connection = PgConnection::connect(&postgres_connection_string)
+        .await
+        .expect("Failed to connect to Postgres");
+
     let client = reqwest::Client::new();
 
     let body = "name=le%20test&email=le_test%40gmail.com";