[#13] added some more unit tests, hated life for a bit

tests/ivago.rs

@@ -1,3 +1,4 @@
+/// In here, any non-unit tests are placed.
 use rocket::http::Status;
 use rocket::local::Client;
 
@@ -12,9 +13,11 @@ fn test_404_response() {
     let response = client.get("/").dispatch();
 
     assert_eq!(response.status(), Status::NotFound);
+    // TODO add text check as well
 }
 
 /// Test 404 on invalid parameters
+// TODO make this check a 400 instead
 #[test]
 fn test_invalid_parameters() {
     let client = Client::new(rocket()).expect("valid rocket instance");