Cover an unsupported case of mixing sync and async service in same server
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 74290c3..364aa41 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -179,6 +179,17 @@
void SetUp() GRPC_OVERRIDE {
int port = grpc_pick_unused_port_or_die();
server_address_ << "localhost:" << port;
+
+ // It is currently unsupported to mix sync and async services
+ // in the same server, so first test that (for coverage)
+ ServerBuilder build_bad;
+ build_bad.AddListeningPort(server_address_.str(),
+ grpc::InsecureServerCredentials());
+ build_bad.RegisterAsyncService(&service_);
+ grpc::cpp::test::util::TestService::Service sync_service;
+ build_bad.RegisterService(&sync_service);
+ GPR_ASSERT(build_bad.BuildAndStart() == nullptr);
+
// Setup server
ServerBuilder builder;
builder.AddListeningPort(server_address_.str(),