[tests] Refactor repeated mocking for daemon RPC

Author: ricab

Diff for: tests/unix/test_daemon_rpc.cpp

@@ -79,6 +79,16 @@ struct TestDaemonRpc : public mpt::DaemonTestFixture
         return mpt::MockDaemon(config_builder.build());
     }
 
+    void mock_empty_list_reply(mpt::MockDaemon& mock_daemon)
+    {
+        EXPECT_CALL(mock_daemon, list(_, _, _)).WillOnce([](auto, auto* server, auto* status_promise) {
+            mp::ListReply reply;
+            reply.mutable_instance_list();
+            server->Write(reply);
+            status_promise->set_value(grpc::Status::OK);
+        });
+    }
+
     std::unique_ptr<mpt::MockCertProvider> mock_cert_provider{std::make_unique<mpt::MockCertProvider>()};
     std::unique_ptr<mpt::MockCertStore> mock_cert_store{std::make_unique<mpt::MockCertStore>()};
 
@@ -202,12 +212,7 @@ TEST_F(TestDaemonRpc, listCertExistsCompletesSuccesfully)
     EXPECT_CALL(*mock_cert_store, verify_cert(StrEq(mpt::client_cert))).WillOnce(Return(true));
 
     mpt::MockDaemon daemon{make_secure_server()};
-    EXPECT_CALL(daemon, list(_, _, _)).WillOnce([](auto, auto* server, auto* status_promise) {
-        mp::ListReply reply;
-        reply.mutable_instance_list();
-        server->Write(reply);
-        status_promise->set_value(grpc::Status::OK);
-    });
+    mock_empty_list_reply(daemon);
 
     send_command({"list"});
 }
@@ -221,12 +226,7 @@ TEST_F(TestDaemonRpc, listNoCertsExistWillVerifyAndComplete)
     EXPECT_CALL(*mock_cert_store, add_cert(StrEq(mpt::client_cert))).Times(1);
 
     mpt::MockDaemon daemon{make_secure_server()};
-    EXPECT_CALL(daemon, list(_, _, _)).WillOnce([](auto, auto* server, auto* status_promise) {
-        mp::ListReply reply;
-        reply.mutable_instance_list();
-        server->Write(reply);
-        status_promise->set_value(grpc::Status::OK);
-    });
+    mock_empty_list_reply(daemon);
 
     send_command({"list"});
 }
@@ -308,12 +308,7 @@ TEST_F(TestDaemonRpc, listSettingServerPermissionsFailLogsErrorAndExits)
     logger_scope.mock_logger->expect_log(mpl::Level::error, error_msg);
     logger_scope.mock_logger->expect_log(mpl::Level::error, "Failed to set up autostart prerequisites", AnyNumber());
 
-    EXPECT_CALL(daemon, list(_, _, _)).WillOnce([](auto, auto* server, auto* status_promise) {
-        mp::ListReply reply;
-        reply.mutable_instance_list();
-        server->Write(reply);
-        status_promise->set_value(grpc::Status::OK);
-    });
+    mock_empty_list_reply(daemon);
 
     send_command({"list"});
 }