add a test for the migration

(currently ignored, due to what I believe is a serde bug)

packages/jobboerse/src/job_offers.rs

@@ -936,10 +936,30 @@ impl Deref for MutBorrowedJobOffer<'_, '_, '_> {
 mod test {
     use std::path::PathBuf;
 
-    use super::JobOffer;
+    use super::{JobOffer, JobOfferStatus};
 
     #[test]
     fn joboffers_can_be_serialized() -> Result<(), toml::ser::Error> {
         toml::ser::to_string_pretty(&JobOffer::<PathBuf>::new_for_test()).map(|_| ())
     }
+
+    #[test]
+    #[ignore = "this appears to be a serde bug see https://github.com/serde-rs/serde/issues/2294"]
+    fn v1_should_not_deserialize_as_current() {
+        let old = super::V1JobOfferStatus {
+            review_status: super::ReviewStatus::AwaitingReview,
+            confirmation_status: super::V1ConfirmationStatus::AwaitingConfirmation {
+                token: "Test".to_string(),
+            },
+        };
+
+        let serialized = toml::ser::to_string_pretty(&old)
+            .expect("testing serialization is not the goal of this test");
+
+        println!("{}", serialized);
+
+        toml::de::from_str::<'_, JobOfferStatus>(&serialized).expect_err(
+            "V1 should not parse as current, this will prevent migration from applying",
+        );
+    }
 }