diff -r 310be640a303 -r c82943fb205f printrun-src/testtools/mock-printer.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/printrun-src/testtools/mock-printer.py	Tue Jan 19 20:45:09 2021 +0100
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+# Test network communication without networked 3d printer
+# Usage:
+# bash1$ ./mock-printer.py
+# bash2$ ./pronsole
+# pronsole> connect localhost:8080
+# ...> load sliced.gcode
+# ...> print
+# ...> etc...
+import socket
+with socket.socket() as s:
+    s.bind(('127.0.0.1', 8080))
+    s.listen(1)
+    c, addr = s.accept()
+    print(c)
+    temp = 0
+    try:
+        c.sendall(b'start\n')
+        while True:
+            msg = c.recv(1024)
+            if not msg:
+                break
+            print(msg)
+            if msg == b'M105\n':
+                c.sendall(('ok T:%d\n'%(20 + temp)).encode('ascii'))
+                temp = (temp + 1)%30
+            else:
+                c.sendall(b'ok\n')
+    finally:
+        c.close()