test: add unit tests for protocol admin read method (#72)

creator-keys/tests/protocol_admin.rs

@@ -0,0 +1,80 @@
+use creator_keys::{CreatorKeysContract, CreatorKeysContractClient};
+use soroban_sdk::{testutils::Address as _, Address, Env};
+
+#[test]
+fn test_get_protocol_admin_returns_none_initially() {
+    let env = Env::default();
+    let contract_id = env.register(CreatorKeysContract, ());
+    let client = CreatorKeysContractClient::new(&env, &contract_id);
+
+    let result = client.get_protocol_admin();
+    assert_eq!(result, None);
+}
+
+#[test]
+fn test_get_protocol_admin_returns_set_address() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let contract_id = env.register(CreatorKeysContract, ());
+    let client = CreatorKeysContractClient::new(&env, &contract_id);
+
+    let admin = Address::generate(&env);
+    let new_admin = Address::generate(&env);
+    client.set_protocol_admin(&admin, &new_admin);
+
+    let result = client.get_protocol_admin();
+    assert_eq!(result, Some(new_admin));
+}
+
+#[test]
+fn test_get_protocol_admin_persists_across_reads() {
+    let env = Env::default();
+    env.mock_all_auths();
+    let contract_id = env.register(CreatorKeysContract, ());
+    let client = CreatorKeysContractClient::new(&env, &contract_id);
+
+    let admin = Address::generate(&env);
+    let new_admin = Address::generate(&env);
+    client.set_protocol_admin(&admin, &new_admin);
+
+    let first_read = client.get_protocol_admin();
+    let second_read = client.get_protocol_admin();
+    assert_eq!(first_read, second_read);
+    assert_eq!(first_read, Some(new_admin));
+}
+
+#[test]
+fn test_get_protocol_admin_is_isolated_from_treasury() {
+    // Ensures the admin read path does not bleed into treasury storage
+    let env = Env::default();
+    env.mock_all_auths();
+    let contract_id = env.register(CreatorKeysContract, ());
+    let client = CreatorKeysContractClient::new(&env, &contract_id);
+
+    let admin = Address::generate(&env);
+    let treasury = Address::generate(&env);
+    // Only set treasury, not protocol admin
+    client.set_treasury_address(&admin, &treasury);
+
+    let result = client.get_protocol_admin();
+    assert_eq!(result, None); // admin storage must be untouched
+}
+
+#[test]
+fn test_get_protocol_admin_overwrite_returns_latest() {
+    // Admin address can be updated and the read returns the most recent value
+    let env = Env::default();
+    env.mock_all_auths();
+    let contract_id = env.register(CreatorKeysContract, ());
+    let client = CreatorKeysContractClient::new(&env, &contract_id);
+
+    let admin = Address::generate(&env);
+    let first_admin = Address::generate(&env);
+    let second_admin = Address::generate(&env);
+
+    client.set_protocol_admin(&admin, &first_admin);
+    assert_eq!(client.get_protocol_admin(), Some(first_admin));
+
+    client.set_protocol_admin(&admin, &second_admin);
+    assert_eq!(client.get_protocol_admin(), Some(second_admin));
+}