local fd = syscall.VFS_open("/tmp/hunit/testfile.txt", "w")
syscall.VFS_write(fd, "This is a test file")
syscall.VFS_close(fd)
local fd = syscall.VFS_open("/tmp/hunit/testfile.txt", "r")
local text = syscall.VFS_read(fd, 64)
syscall.VFS_close(fd)

if text~="This is a test file" then
    error("File failed to write/read")
end