dnet: commit test script that shows breaking usage

bin/dnet/test/view.py

@@ -0,0 +1,53 @@
+# This file is part of DarkFi (https://dark.fi)
+#
+# Copyright (C) 2020-2023 Dyne.org foundation
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import urwid, asyncio
+
+class Demo:
+    palette = [('body','light gray','black', 'standout')]
+
+    def __init__(self, data=None):
+        self.listbox_content = []
+        self.listwalker = urwid.SimpleListWalker(self.listbox_content)
+        self.list = urwid.ListBox(self.listwalker)
+        self.ui = urwid.Frame(urwid.AttrWrap( self.list, 'body' ))
+
+        self.ev = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.ev)
+
+    def main(self):
+        self.loop = urwid.MainLoop(self.ui, self.palette,
+            event_loop=urwid.AsyncioEventLoop(loop=self.ev),
+                                   unhandled_input=self.unhandled_input)
+        self.ev.create_task(self.say_hello())
+        self.loop.run()
+
+    def unhandled_input(self, k):
+        if k in ('q','Q'):
+            raise urwid.ExitMainLoop()
+
+
+    async def say_hello(self):
+        while True:
+            await asyncio.sleep(0.1)
+            self.listwalker.contents.append(urwid.Text("hello"))
+    
+
+if __name__ == '__main__':
+    demo = Demo()
+    demo.main()
+