changes

crates/application/tests/day/timezone_test.rs

@@ -0,0 +1,34 @@
+use std::sync::Arc;
+
+use domain::ports::{UserCommandPort, UserQueryPort};
+use domain::testing::{InMemoryStore, test_user};
+use domain::user::Timezone;
+
+use application::day::timezone_for;
+
+#[tokio::test]
+async fn a_users_timezone_is_resolved_when_they_have_one() {
+    let store = Arc::new(InMemoryStore::new());
+    let mut user = test_user("alice");
+    user.update_timezone(Some(Timezone::new("Europe/Warsaw").unwrap()));
+    store.save(&user).await.unwrap();
+
+    let users: Arc<dyn UserQueryPort> = store.clone();
+    let timezone = timezone_for(user.id(), &users).await.unwrap();
+
+    assert_eq!(timezone.value(), "Europe/Warsaw");
+}
+
+#[tokio::test]
+async fn a_user_with_no_timezone_gets_an_error_that_says_what_to_do() {
+    let store = Arc::new(InMemoryStore::new());
+    let user = test_user("bob");
+    store.save(&user).await.unwrap();
+
+    let users: Arc<dyn UserQueryPort> = store.clone();
+    let error = timezone_for(user.id(), &users).await.unwrap_err();
+
+    let message = error.to_string();
+    assert!(message.contains("timezone"));
+    assert!(message.contains("settings"));
+}