add basic test for default protocols

tests/host/test_basic_host.py

@@ -0,0 +1,14 @@
+from libp2p import initialize_default_swarm
+from libp2p.crypto.rsa import create_new_key_pair
+from libp2p.host.basic_host import BasicHost
+from libp2p.host.defaults import get_default_protocols
+
+
+def test_default_protocols():
+    key_pair = create_new_key_pair()
+    swarm = initialize_default_swarm(key_pair)
+    host = BasicHost(swarm)
+
+    mux = host.get_mux()
+    handlers = mux.handlers
+    assert handlers == get_default_protocols()