Move test utilities to tools (#356)

* move test factories to libp2p/tools

* remove unused inits

* move pubsub test utils to tools

* cleanup test_interop

* fix typing libp2p/tools/utils

* add typing to pubsub utils

* fix factories typing

* fix typing for floodsub_integration_test_settings

* fix rest of the typing

* fix isort

libp2p/tools/interop/utils.py

@@ -0,0 +1,58 @@
+import asyncio
+from typing import Union
+
+from multiaddr import Multiaddr
+
+from libp2p.host.host_interface import IHost
+from libp2p.peer.id import ID
+from libp2p.peer.peerinfo import PeerInfo
+
+from .daemon import Daemon
+
+TDaemonOrHost = Union[IHost, Daemon]
+
+
+def _get_peer_info(node: TDaemonOrHost) -> PeerInfo:
+    peer_info: PeerInfo
+    if isinstance(node, Daemon):
+        peer_info = node.peer_info
+    else:  # isinstance(node, IHost)
+        peer_id = node.get_id()
+        maddrs = [
+            node.get_addrs()[0].decapsulate(Multiaddr(f"/p2p/{peer_id.to_string()}"))
+        ]
+        peer_info = PeerInfo(peer_id, maddrs)
+    return peer_info
+
+
+async def _is_peer(peer_id: ID, node: TDaemonOrHost) -> bool:
+    if isinstance(node, Daemon):
+        pinfos = await node.control.list_peers()
+        peers = tuple([pinfo.peer_id for pinfo in pinfos])
+        return peer_id in peers
+    else:  # isinstance(node, IHost)
+        return peer_id in node.get_network().connections
+
+
+async def connect(a: TDaemonOrHost, b: TDaemonOrHost) -> None:
+    # Type check
+    err_msg = (
+        f"Type of a={type(a)} or type of b={type(b)} is wrong."
+        "Should be either `IHost` or `Daemon`"
+    )
+    assert all(
+        [isinstance(node, IHost) or isinstance(node, Daemon) for node in (a, b)]
+    ), err_msg
+
+    b_peer_info = _get_peer_info(b)
+    if isinstance(a, Daemon):
+        await a.control.connect(b_peer_info.peer_id, b_peer_info.addrs)
+    else:  # isinstance(b, IHost)
+        await a.connect(b_peer_info)
+    # Allow additional sleep for both side to establish the connection.
+    await asyncio.sleep(0.1)
+
+    a_peer_info = _get_peer_info(a)
+
+    assert await _is_peer(b_peer_info.peer_id, a)
+    assert await _is_peer(a_peer_info.peer_id, b)