doc: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
# "Succeed!" is printed at last when succeed.
$ mix run script/run.exs
doc: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
# "Succeed!" is printed at last when succeed.
$ mix run script/run.exs