modified tests to check db entry and get config settings

tests/health_check.rs

@@ -1,4 +1,6 @@
+use sqlx::{Connection, PgConnection};
 use std::net::TcpListener;
+use zero2prod::configuration::get_configuration;
 
 #[tokio::test]
 async fn health_check_works() {
@@ -19,19 +21,27 @@ fn spawn_app() -> String {
     let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind to random port");
     // get random port
     let port = listener.local_addr().unwrap().port();
-    let server = zero2prod::run(listener).expect("Failed to bind address");
+    let server = zero2prod::startup::run(listener).expect("Failed to bind address");
     let _ = tokio::spawn(server);
     // return the application address and the port number
     format!("http://127.0.0.1:{}", port)
 }
 
 #[tokio::test]
 async fn subscribe_returns_a_200_for_valid_form_data() {
-    // setup
+    // get web app url
     let app_address = spawn_app();
+    // get web app & db config
+    let configuration = get_configuration().expect("failed to get config");
+    // setup postgres connection
+    let connection_string = configuration.database.connection_string();
+    let mut connection = PgConnection::connect(&connection_string)
+        .await
+        .expect("failed to connect to postgres");
+    // create web app endpoint
     let client = reqwest::Client::new();
 
-    // test
+    // test web app received post request
     let body = "name=le%20guin&email=ursula_le_guin%40gmail.com";
     let response = client
         .post(&format!("{}/subscriptions", &app_address))
@@ -43,6 +53,15 @@ async fn subscribe_returns_a_200_for_valid_form_data() {
 
     // assert test gets ok
     assert_eq!(200, response.status().as_u16());
+
+    // test db has written test entry
+    let saved = sqlx::query!("select email, name from subscriptions",)
+        .fetch_one(&mut connection)
+        .await
+        .expect("fail to fetch test entry");
+
+    assert_eq!(saved.email, "[email protected]");
+    assert_eq!(saved.name, "le guin");
 }
 
 #[tokio::test]