reorg test structure to match tox and CI jobs, drop bumpversion for bump-my-version and move config to pyproject.toml, fix docs building

tests/core/transport/test_tcp.py

@@ -0,0 +1,63 @@
+from multiaddr import (
+    Multiaddr,
+)
+import pytest
+import trio
+
+from libp2p.network.connection.raw_connection import (
+    RawConnection,
+)
+from libp2p.tools.constants import (
+    LISTEN_MADDR,
+)
+from libp2p.transport.exceptions import (
+    OpenConnectionError,
+)
+from libp2p.transport.tcp.tcp import (
+    TCP,
+)
+
+
+@pytest.mark.trio
+async def test_tcp_listener(nursery):
+    transport = TCP()
+
+    async def handler(tcp_stream):
+        pass
+
+    listener = transport.create_listener(handler)
+    assert len(listener.get_addrs()) == 0
+    await listener.listen(LISTEN_MADDR, nursery)
+    assert len(listener.get_addrs()) == 1
+    await listener.listen(LISTEN_MADDR, nursery)
+    assert len(listener.get_addrs()) == 2
+
+
+@pytest.mark.trio
+async def test_tcp_dial(nursery):
+    transport = TCP()
+    raw_conn_other_side = None
+    event = trio.Event()
+
+    async def handler(tcp_stream):
+        nonlocal raw_conn_other_side
+        raw_conn_other_side = RawConnection(tcp_stream, False)
+        event.set()
+        await trio.sleep_forever()
+
+    # Test: `OpenConnectionError` is raised when trying to dial to a port which
+    #   no one is not listening to.
+    with pytest.raises(OpenConnectionError):
+        await transport.dial(Multiaddr("/ip4/127.0.0.1/tcp/1"))
+
+    listener = transport.create_listener(handler)
+    await listener.listen(LISTEN_MADDR, nursery)
+    addrs = listener.get_addrs()
+    assert len(addrs) == 1
+    listen_addr = addrs[0]
+    raw_conn = await transport.dial(listen_addr)
+    await event.wait()
+
+    data = b"123"
+    await raw_conn_other_side.write(data)
+    assert (await raw_conn.read(len(data))) == data