tests: socket_comms: add simple check

Add a simple test for `comms_check` to ensure the logic works on all
OS's in CI.

Signed-off-by: Jordan Yates <jordan@embeint.com>

Author: JordanYates

tests/test_socket_comms.py

@@ -0,0 +1,26 @@
+import os
+
+import infuse_iot.socket_comms as comms
+
+assert "TOXTEMPDIR" in os.environ, "you must run these tests using tox"
+
+
+def test_socket_comms():
+    # Ensure notifications can be sent from the server to the client, and requests sent in reverse
+    mulicast_addr = comms.default_multicast_address()
+    server = comms.LocalServer(mulicast_addr)
+    client = comms.LocalClient(mulicast_addr)
+
+    # Send request to server
+    request = comms.GatewayRequestCommsCheck()
+    client.send(request)
+
+    # Server receives request, responds
+    recv_req = server.receive()
+    assert isinstance(recv_req, comms.GatewayRequestCommsCheck)
+    response = comms.ClientNotificationCommsCheck()
+    server.broadcast(response)
+
+    # Client receives the response
+    recv_rsp = client.receive()
+    assert isinstance(recv_rsp, comms.ClientNotificationCommsCheck)