more trial and error for sanity

CMakeLists.txt

@@ -3157,6 +3157,7 @@ add_library(grpc++_test_util
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.pb.h
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.h
+  ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc_mock.pb.h
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/duplicate/echo_duplicate.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/duplicate/echo_duplicate.pb.h
@@ -10431,6 +10432,7 @@ add_executable(grpc_tool_test
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.pb.h
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.h
+  ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo_mock.grpc.pb.h
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo_messages.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo_messages.grpc.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo_messages.pb.h
@@ -11511,6 +11513,7 @@ add_executable(server_builder_test
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.cc
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.pb.h
   ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo.grpc.pb.h
+  ${_gRPC_PROTO_GENS_DIR}/src/proto/grpc/testing/echo_mock.grpc.pb.h
   test/cpp/server/server_builder_test.cc
   third_party/googletest/googletest/src/gtest-all.cc
 )

tools/run_tests/generated/sources_and_headers.json

@@ -5930,6 +5930,7 @@
       "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h", 
       "src/proto/grpc/testing/duplicate/echo_duplicate.pb.h", 
       "src/proto/grpc/testing/echo.grpc.pb.h", 
+      "src/proto/grpc/testing/echo_mock.grpc.pb.h", 
       "src/proto/grpc/testing/echo.pb.h", 
       "src/proto/grpc/testing/echo_messages.grpc.pb.h", 
       "src/proto/grpc/testing/echo_messages.pb.h", 

vsprojects/vcxproj/grpc++_test_util/grpc++_test_util.vcxproj

@@ -234,6 +234,8 @@
     </ClCompile>
     <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\testing\echo.grpc.pb.h">
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\testing\echo_mock.grpc.pb.h">
+    </ClInclude>
     <ClCompile Include="$(SolutionDir)\..\src\proto\grpc\testing\duplicate\echo_duplicate.pb.cc">
     </ClCompile>
     <ClInclude Include="$(SolutionDir)\..\src\proto\grpc\testing\duplicate\echo_duplicate.pb.h">