Add test

backend/integration_tests/src/update_profile_tests.rs

@@ -36,9 +36,13 @@ fn update_username_succeeds() {
 #[test]
 fn update_display_name_succeeds() {
     let mut wrapper = ENV.deref().get();
-    let TestEnv { env, canister_ids, .. } = wrapper.env();
+    let TestEnv {
+        env,
+        canister_ids,
+        controller,
+    } = wrapper.env();
 
-    let user = client::local_user_index::happy_path::register_user(env, canister_ids.local_user_index);
+    let user = client::register_diamond_user(env, canister_ids, *controller);
 
     env.advance_time(Duration::from_secs(10));
 
@@ -59,3 +63,29 @@ fn update_display_name_succeeds() {
     let updates = client::user::happy_path::updates(env, &user, now - 1);
     assert_eq!(updates.unwrap().display_name, OptionUpdate::SetToSome(display_name));
 }
+
+#[test]
+fn update_display_name_unauthorized_if_not_diamond_member() {
+    let mut wrapper = ENV.deref().get();
+    let TestEnv { env, canister_ids, .. } = wrapper.env();
+
+    let user = client::local_user_index::happy_path::register_user(env, canister_ids.local_user_index);
+
+    env.advance_time(Duration::from_secs(10));
+
+    let display_name = random_string();
+
+    let response = client::user_index::set_display_name(
+        env,
+        user.principal,
+        canister_ids.user_index,
+        &user_index_canister::set_display_name::Args {
+            display_name: Some(display_name.clone()),
+        },
+    );
+
+    assert!(matches!(
+        response,
+        user_index_canister::set_display_name::Response::Unauthorized
+    ));
+}