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/import/save_profile_test.rs

@@ -0,0 +1,62 @@
+use std::sync::Arc;
+
+use domain::models::ImportSession;
+use domain::ports::ImportSessionRepository;
+use domain::testing::InMemoryStore;
+use domain::value_objects::UserId;
+use uuid::Uuid;
+
+use application::import::deps::SaveProfileDeps;
+use application::import::{commands::SaveImportProfileCommand, save_profile};
+
+#[tokio::test]
+async fn fails_when_session_not_found() {
+    let sessions = InMemoryStore::new();
+    let profiles = Arc::clone(&sessions);
+
+    let deps = SaveProfileDeps {
+        import_session: Arc::clone(&sessions) as _,
+        import_profile: Arc::clone(&profiles) as _,
+    };
+
+    let result = save_profile::execute(
+        &deps,
+        SaveImportProfileCommand {
+            user_id: Uuid::new_v4(),
+            session_id: Uuid::new_v4(),
+            name: "my profile".into(),
+        },
+    )
+    .await;
+
+    assert!(result.is_err());
+}
+
+#[tokio::test]
+async fn saves_profile_from_session() {
+    let sessions = InMemoryStore::new();
+    let profiles = Arc::clone(&sessions);
+    let user_id = Uuid::new_v4();
+
+    let mut session = ImportSession::new(UserId::from_uuid(user_id));
+    let sid = session.id.clone();
+    session.field_mappings = Some(vec![]);
+    sessions.create(&session).await.unwrap();
+
+    let deps = SaveProfileDeps {
+        import_session: Arc::clone(&sessions) as _,
+        import_profile: Arc::clone(&profiles) as _,
+    };
+
+    let result = save_profile::execute(
+        &deps,
+        SaveImportProfileCommand {
+            user_id,
+            session_id: sid.value(),
+            name: "my profile".into(),
+        },
+    )
+    .await;
+
+    assert!(result.is_ok());
+}