nixpkgs/nixos/tests/nats.nix

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let
port = 4222;
username = "client";
password = "password";
topic = "foo.bar";
in import ./make-test-python.nix ({ pkgs, lib, ... }: {
name = "nats";
meta = with pkgs.lib; { maintainers = with maintainers; [ c0deaddict ]; };
nodes = let
client = { pkgs, ... }: {
environment.systemPackages = with pkgs; [ natscli ];
};
in {
server = { pkgs, ... }: {
networking.firewall.allowedTCPPorts = [ port ];
services.nats = {
inherit port;
enable = true;
settings = {
authorization = {
users = [{
user = username;
inherit password;
}];
};
};
};
};
client1 = client;
client2 = client;
};
testScript = let file = "/tmp/msg";
in ''
def nats_cmd(*args):
return (
"nats "
"--server=nats://server:${toString port} "
"--user=${username} "
"--password=${password} "
"{}"
).format(" ".join(args))
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def parallel(*fns):
from threading import Thread
threads = [ Thread(target=fn) for fn in fns ]
for t in threads: t.start()
for t in threads: t.join()
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start_all()
server.wait_for_unit("nats.service")
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with subtest("pub sub"):
parallel(
lambda: client1.succeed(nats_cmd("sub", "--count", "1", "${topic}")),
lambda: client2.succeed("sleep 2 && {}".format(nats_cmd("pub", "${topic}", "hello"))),
)
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'';
})