[#13] Further overhaul of the project structure for better testing

tests/ivago.rs

@@ -0,0 +1,26 @@
+use rocket::http::Status;
+use rocket::local::Client;
+
+fn rocket() -> rocket::Rocket {
+    rocket::ignite().mount("/", fej_lib::ivago::routes())
+}
+
+/// Test 404 response
+#[test]
+fn test_404_response() {
+    let client = Client::new(rocket()).expect("valid rocket instance");
+    let response = client.get("/").dispatch();
+
+    assert_eq!(response.status(), Status::NotFound);
+}
+
+/// Test 404 on invalid parameters
+#[test]
+fn test_invalid_parameters() {
+    let client = Client::new(rocket()).expect("valid rocket instance");
+    let response = client
+        .get("/?street=astreet+(city)&number=500&start_date=2021-04-04&end_date=2021-04-555")
+        .dispatch();
+
+    assert_eq!(response.status(), Status::NotFound);
+}