Add self subscription tests

tests/pubsub/test_subscription.py

@@ -0,0 +1,63 @@
+# pylint: disable=redefined-outer-name
+import pytest
+
+from libp2p import new_node
+from libp2p.pubsub.pubsub import Pubsub
+from libp2p.pubsub.floodsub import FloodSub
+
+SUPPORTED_PUBSUB_PROTOCOLS = ["/floodsub/1.0.0"]
+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