test(rtc_data_service): add smoke test for save_access_key ECALL

rtc_data_service/tests/ecalls/mod.rs

@@ -1,3 +1,4 @@
 //! ECALL tests
 
 mod local_attestation;
+mod save_access_key;

rtc_data_service/tests/ecalls/save_access_key.rs

@@ -0,0 +1,28 @@
+//! Test ECALL: `save_access_key`
+
+use rtc_types::byte_formats::rkyv_format;
+use rtc_types::enclave_messages::set_access_key;
+use sgx_types::sgx_enclave_id_t;
+
+use crate::helpers;
+
+#[test]
+fn save_access_key_smoke_test() {
+    let auth_enclave = helpers::init_auth_enclave();
+
+    let dummy_ciphertext = [123; set_access_key::REQUEST_SIZE];
+    let dummy_sending_enclave_id: sgx_enclave_id_t = 456;
+    let encrypted_request = set_access_key::EncryptedRequest {
+        tag: Default::default(),
+        ciphertext: dummy_ciphertext,
+        aad: rkyv_format::write_array(&dummy_sending_enclave_id).unwrap(),
+        nonce: Default::default(),
+    };
+    let result = auth_enclave.save_access_key(encrypted_request).unwrap();
+    let sealing_error = result.unwrap_err();
+
+    assert_eq!(
+        format!("{}", sealing_error),
+        "Failed to acquire ProtectedChannel: No active session for enclave ID 456"
+    )
+}