* tests/test-nonblocking-socket.sh: New file.
* tests/test-nonblocking-socket-main.c: New file.
* tests/test-nonblocking-socket-child.c: New file.
* tests/test-nonblocking-socket.h: New file.
* tests/socket-server.h: New file.
* tests/socket-client.h: New file.
* modules/nonblocking-socket-tests: New file.
* modules/nonblocking-tests (Depends-on): Add nonblocking-socket-tests.
