code refactor

Reviewed-on: #26

crates/application/tests/watchlist/remove_test.rs

@@ -0,0 +1,107 @@
+use std::sync::Arc;
+
+use domain::events::DomainEvent;
+use domain::models::WatchlistEntry;
+use domain::ports::WatchlistRepository;
+use domain::testing::{InMemoryStore, RefusingWatchlistRepository};
+use domain::value_objects::{MovieId, UserId};
+use uuid::Uuid;
+
+use crate::support::TestContextBuilder;
+use application::watchlist::{
+    commands::RemoveFromWatchlistCommand, deps::RemoveFromWatchlistDeps, remove,
+};
+
+#[tokio::test]
+async fn removing_an_entry_records_the_removal_and_its_event_together() {
+    let watchlist = InMemoryStore::new();
+    let uid = Uuid::new_v4();
+    let mid = Uuid::new_v4();
+    watchlist
+        .add(
+            &WatchlistEntry::new(UserId::from_uuid(uid), MovieId::from_uuid(mid)),
+            &[],
+        )
+        .await
+        .unwrap();
+
+    let deps = RemoveFromWatchlistDeps {
+        watchlist: Arc::clone(&watchlist) as _,
+    };
+    remove::execute(
+        &deps,
+        RemoveFromWatchlistCommand {
+            user_id: uid,
+            movie_id: mid,
+        },
+    )
+    .await
+    .unwrap();
+
+    assert_eq!(watchlist.watchlist_count(), 0);
+    let recorded = watchlist.recorded_events();
+    assert_eq!(recorded.len(), 1);
+    assert!(matches!(
+        recorded[0],
+        DomainEvent::WatchlistEntryRemoved { .. }
+    ));
+}
+
+#[tokio::test]
+async fn fails_when_not_on_watchlist() {
+    let b = TestContextBuilder::new();
+    let deps = RemoveFromWatchlistDeps {
+        watchlist: b.watchlist_repo.clone(),
+    };
+    let result = remove::execute(
+        &deps,
+        RemoveFromWatchlistCommand {
+            user_id: Uuid::new_v4(),
+            movie_id: Uuid::new_v4(),
+        },
+    )
+    .await;
+
+    assert!(result.is_err());
+}
+
+#[tokio::test]
+async fn a_failed_removal_records_no_event() {
+    let store = InMemoryStore::new();
+    let deps = RemoveFromWatchlistDeps {
+        watchlist: Arc::clone(&store) as _,
+    };
+
+    let result = remove::execute(
+        &deps,
+        RemoveFromWatchlistCommand {
+            user_id: Uuid::new_v4(),
+            movie_id: Uuid::new_v4(),
+        },
+    )
+    .await;
+
+    assert!(result.is_err());
+    assert!(store.recorded_events().is_empty());
+}
+
+#[tokio::test]
+async fn a_refused_remove_propagates_the_refusal() {
+    let deps = RemoveFromWatchlistDeps {
+        watchlist: Arc::new(RefusingWatchlistRepository),
+    };
+
+    let result = remove::execute(
+        &deps,
+        RemoveFromWatchlistCommand {
+            user_id: Uuid::new_v4(),
+            movie_id: Uuid::new_v4(),
+        },
+    )
+    .await;
+
+    assert!(matches!(
+        result,
+        Err(domain::errors::DomainError::InfrastructureError(m)) if m == "refused"
+    ));
+}