patch 7.4.1246
Problem: The channel functionality isn't tested.
Solution: Add a test using a Python test server.
diff --git a/src/testdir/test_channel.py b/src/testdir/test_channel.py
new file mode 100644
index 0000000..a706243
--- /dev/null
+++ b/src/testdir/test_channel.py
@@ -0,0 +1,110 @@
+#!/usr/bin/python
+#
+# Server that will accept connections from a Vim channel.
+# Run this server and then in Vim you can open the channel:
+# :let handle = ch_open('localhost:8765', 'json')
+#
+# Then Vim can send requests to the server:
+# :let response = ch_sendexpr(handle, 'hello!')
+#
+# And you can control Vim by typing a JSON message here, e.g.:
+# ["ex","echo 'hi there'"]
+#
+# There is no prompt, just type a line and press Enter.
+# To exit cleanly type "quit<Enter>".
+#
+# See ":help channel-demo" in Vim.
+#
+# This requires Python 2.6 or later.
+
+from __future__ import print_function
+import json
+import socket
+import sys
+import threading
+
+try:
+ # Python 3
+ import socketserver
+except ImportError:
+ # Python 2
+ import SocketServer as socketserver
+
+thesocket = None
+
+class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler):
+
+ def handle(self):
+ print("=== socket opened ===")
+ global thesocket
+ thesocket = self.request
+ while True:
+ try:
+ data = self.request.recv(4096).decode('utf-8')
+ except socket.error:
+ print("=== socket error ===")
+ break
+ except IOError:
+ print("=== socket closed ===")
+ break
+ if data == '':
+ print("=== socket closed ===")
+ break
+ print("received: {}".format(data))
+ try:
+ decoded = json.loads(data)
+ except ValueError:
+ print("json decoding failed")
+ decoded = [-1, '']
+
+ # Send a response if the sequence number is positive.
+ # Negative numbers are used for "eval" responses.
+ if decoded[0] >= 0:
+ if decoded[1] == 'hello!':
+ # simply send back a string
+ response = "got it"
+ elif decoded[1] == 'make change':
+ # Send two ex commands at the same time, before replying to
+ # the request.
+ cmd = '["ex","call append(\\"$\\",\\"added1\\")"]'
+ cmd += '["ex","call append(\\"$\\",\\"added2\\")"]'
+ print("sending: {}".format(cmd))
+ thesocket.sendall(cmd.encode('utf-8'))
+ response = "ok"
+ elif decoded[1] == '!quit!':
+ # we're done
+ sys.exit(0)
+ else:
+ response = "what?"
+
+ encoded = json.dumps([decoded[0], response])
+ print("sending: {}".format(encoded))
+ thesocket.sendall(encoded.encode('utf-8'))
+
+ thesocket = None
+
+class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
+ pass
+
+if __name__ == "__main__":
+ HOST, PORT = "localhost", 0
+
+ server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler)
+ ip, port = server.server_address
+
+ # Start a thread with the server -- that thread will then start one
+ # more thread for each request
+ server_thread = threading.Thread(target=server.serve_forever)
+
+ # Exit the server thread when the main thread terminates
+ server_thread.daemon = True
+ server_thread.start()
+
+ # Write the port number in Xportnr, so that the test knows it.
+ f = open("Xportnr", "w")
+ f.write("{}".format(port))
+ f.close()
+
+ # Block here
+ print("Listening on port {}".format(port))
+ server.serve_forever()