improve grpc tests (#2043)

* improve grpc tests

* add corefoundation for abseil

packages/a/abseil/xmake.lua

@@ -37,6 +37,10 @@ package("abseil")
         "absl_strerror", "absl_examine_stack", "absl_low_level_hash", "absl_random_seed_gen_exception", "absl_civil_time",
         "absl_crc_cord_state", "absl_crc32c", "absl_crc_cpu_detect", "absl_crc_internal")
 
+    if is_plat("macosx") then
+        add_frameworks("CoreFoundation")
+    end
+
     on_load(function (package)
         if package:is_plat("windows") and package:config("shared") then
             package:add("defines", "ABSL_CONSUME_DLL")

packages/g/grpc/xmake.lua

@@ -52,8 +52,12 @@ package("grpc")
 
     on_test(function (package)
         assert(package:check_cxxsnippets({test = [[
+            #include <iostream>
             void test() {
                 grpc::CompletionQueue q;
+                std::string server_address("192.168.28.109:9010");
+                auto channel = grpc::CreateChannel(server_address, grpc::InsecureChannelCredentials());
+                std::cout << &channel << std::endl;
             }
         ]]}, {configs = {languages = "c++17"}, includes = "grpcpp/grpcpp.h"}))
     end)