test: move application tests to tests/

test_support/test_helpers -> tests/support; watched_at unified w/ domain test_watched_at (2024-03-15).
Kept inline: users::diary_filter tests (feed_sort_to_direction_all_variants, paged_user_filter_builds_correctly) - pub(super) helpers in private module.
Dropped stale never-compiled users/tests/get_users.rs (old execute signature).

crates/application/tests/integrations/get_queue_test.rs

@@ -0,0 +1,56 @@
+use std::sync::Arc;
+
+use chrono::Utc;
+use domain::models::{WatchEvent, WatchEventSource};
+use domain::ports::WatchEventCommand;
+use domain::testing::InMemoryStore;
+use domain::value_objects::UserId;
+use uuid::Uuid;
+
+use application::integrations::deps::GetWatchQueueDeps;
+use application::integrations::{get_queue, queries::GetWatchQueueQuery};
+
+fn deps(events: &Arc<InMemoryStore>) -> GetWatchQueueDeps {
+    GetWatchQueueDeps {
+        watch_event_query: Arc::clone(events) as _,
+    }
+}
+
+#[tokio::test]
+async fn returns_empty_when_no_events() {
+    let events = InMemoryStore::new();
+
+    let result = get_queue::execute(
+        &deps(&events),
+        GetWatchQueueQuery {
+            user_id: Uuid::new_v4(),
+        },
+    )
+    .await
+    .unwrap();
+
+    assert!(result.is_empty());
+}
+
+#[tokio::test]
+async fn returns_pending_events() {
+    let events = InMemoryStore::new();
+
+    let user_id = Uuid::new_v4();
+    let event = WatchEvent::new(
+        UserId::from_uuid(user_id),
+        "Blade Runner 2049".into(),
+        Some(2017),
+        None,
+        WatchEventSource::Jellyfin,
+        Utc::now().naive_utc(),
+        None,
+    );
+    events.save(&event).await.unwrap();
+
+    let result = get_queue::execute(&deps(&events), GetWatchQueueQuery { user_id })
+        .await
+        .unwrap();
+
+    assert_eq!(result.len(), 1);
+}