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/test_subscription.py

@@ -1,66 +0,0 @@
-# pylint: disable=redefined-outer-name
-import pytest
-
-from libp2p import new_node
-from libp2p.pubsub.pubsub import Pubsub
-from libp2p.pubsub.floodsub import FloodSub
-
-from .configs import FLOODSUB_PROTOCOL_ID
-
-
-SUPPORTED_PUBSUB_PROTOCOLS = [FLOODSUB_PROTOCOL_ID]
-TESTING_TOPIC = "TEST_SUBSCRIBE"
-
-
-class NoConnNode:
-    # pylint: disable=too-few-public-methods
-
-    def __init__(self, host, pubsub):
-        self.host = host
-        self.pubsub = pubsub
-
-    @classmethod
-    async def create(cls):
-        host = await new_node()
-        floodsub = FloodSub(SUPPORTED_PUBSUB_PROTOCOLS)
-        pubsub = Pubsub(host, floodsub, "test")
-        return cls(host, pubsub)
-
-
-@pytest.fixture
-async def node():
-    return await NoConnNode.create()
-
-
-@pytest.mark.asyncio
-async def test_subscribe_unsubscribe(node):
-    await node.pubsub.subscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC in node.pubsub.my_topics
-
-    await node.pubsub.unsubscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC not in node.pubsub.my_topics
-
-
-@pytest.mark.asyncio
-async def test_re_subscribe(node):
-    await node.pubsub.subscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC in node.pubsub.my_topics
-
-    await node.pubsub.subscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC in node.pubsub.my_topics
-
-
-@pytest.mark.asyncio
-async def test_re_unsubscribe(node):
-    # Unsubscribe from topic we didn't even subscribe to
-    assert "NOT_MY_TOPIC" not in node.pubsub.my_topics
-    await node.pubsub.unsubscribe("NOT_MY_TOPIC")
-
-    await node.pubsub.subscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC in node.pubsub.my_topics
-
-    await node.pubsub.unsubscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC not in node.pubsub.my_topics
-
-    await node.pubsub.unsubscribe(TESTING_TOPIC)
-    assert TESTING_TOPIC not in node.pubsub.my_topics