refactor: move inline tests to separate files via #[path]

crates/domain/src/models/tests.rs

@@ -0,0 +1,31 @@
+use super::*;
+use crate::value_objects::{Email, PasswordHash, UserId, Username};
+
+fn make_user() -> User {
+    User::from_persistence(
+        UserId::generate(),
+        Email::new("a@b.com".to_string()).unwrap(),
+        Username::new("alice".to_string()).unwrap(),
+        PasswordHash::new("hash".to_string()).unwrap(),
+        UserRole::Standard,
+        None,
+        None,
+    )
+}
+
+#[test]
+fn update_profile_sets_fields() {
+    let mut user = make_user();
+    user.update_profile(Some("My bio".to_string()), Some("avatars/abc".to_string()));
+    assert_eq!(user.bio(), Some("My bio"));
+    assert_eq!(user.avatar_path(), Some("avatars/abc"));
+}
+
+#[test]
+fn update_profile_clears_with_none() {
+    let mut user = make_user();
+    user.update_profile(Some("bio".to_string()), Some("path".to_string()));
+    user.update_profile(None, None);
+    assert_eq!(user.bio(), None);
+    assert_eq!(user.avatar_path(), None);
+}