Use factories and fixtures in pubsub tests

Done
- Add factories using factory-boy
- Modify fixtures and tests to use factories
- Modify tests to use fixtures and factories
- Clean up

tests/pubsub/configs.py

@@ -1,7 +1,18 @@
-import multiaddr
+from typing import NamedTuple
 
 
 FLOODSUB_PROTOCOL_ID = "/floodsub/1.0.0"
 GOSSIPSUB_PROTOCOL_ID = "/gossipsub/1.0.0"
 
-LISTEN_MADDR = multiaddr.Multiaddr("/ip4/127.0.0.1/tcp/0")
+
+class GossipsubParams(NamedTuple):
+    degree: int = 10
+    degree_low: int = 9
+    degree_high: int = 11
+    time_to_live: int = 30
+    gossip_window: int = 3
+    gossip_history: int = 5
+    heartbeat_interval: float = 0.5
+
+
+GOSSIPSUB_PARAMS = GossipsubParams()