tests: Rename uasyncio to asyncio.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

tests/multi_net/asyncio_tcp_close_write.py

@@ -0,0 +1,66 @@
+# Test asyncio TCP stream closing then writing
+
+try:
+    import asyncio
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+PORT = 8000
+
+
+async def handle_connection(reader, writer):
+    # Write data to ensure connection
+    writer.write(b"x")
+    await writer.drain()
+
+    # Read, should return nothing
+    print("read:", await reader.read(100))
+
+    # Close connection
+    print("close")
+    writer.close()
+    await writer.wait_closed()
+
+    print("done")
+    ev.set()
+
+
+async def tcp_server():
+    global ev
+    ev = asyncio.Event()
+    server = await asyncio.start_server(handle_connection, "0.0.0.0", PORT)
+    print("server running")
+    multitest.next()
+    async with server:
+        await asyncio.wait_for(ev.wait(), 5)
+
+
+async def tcp_client():
+    reader, writer = await asyncio.open_connection(IP, PORT)
+
+    # Read data to ensure connection
+    print("read:", await reader.read(1))
+
+    # Close connection
+    print("close")
+    writer.close()
+    await writer.wait_closed()
+
+    # Try writing data to the closed connection
+    print("write")
+    try:
+        writer.write(b"x")
+        await writer.drain()
+    except OSError:
+        print("OSError")
+
+
+def instance0():
+    multitest.globals(IP=multitest.get_network_ip())
+    asyncio.run(tcp_server())
+
+
+def instance1():
+    multitest.next()
+    asyncio.run(tcp_client())