add tests for trip_details

src/model/tripdetails.rs

@@ -11,6 +11,7 @@ pub struct TripDetails {
 }
 
 impl TripDetails {
+    /// Creates a new entry in `trip_details` and returns its id.
     pub async fn create(
         db: &SqlitePool,
         planned_starting_time: String,
@@ -31,3 +32,25 @@ impl TripDetails {
         query.last_insert_rowid()
     }
 }
+
+#[cfg(test)]
+mod test {
+    use crate::testdb;
+
+    use super::TripDetails;
+    use sqlx::SqlitePool;
+
+    #[sqlx::test]
+    fn test() {
+        let pool = testdb!();
+
+        assert_eq!(
+            TripDetails::create(&pool, "10:00".into(), 2, "1970-01-01".into(), None).await,
+            1,
+        );
+        assert_eq!(
+            TripDetails::create(&pool, "10:00".into(), 2, "1970-01-01".into(), None).await,
+            2,
+        );
+    }
+}