pytest: Add a zeroreserve test

tests/plugins/zeroreserve.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+"""Use the openchannel hook to selectively opt-into zeroconf
+"""
+
+from pyln.client import Plugin
+
+plugin = Plugin()
+
+
+@plugin.hook('openchannel')
+def on_openchannel(openchannel, plugin, **kwargs):
+    plugin.log(repr(openchannel))
+    reserve = plugin.options['reserve']['value']
+
+    if reserve is None:
+        return {'result': 'continue'}
+    else:
+        return {'result': 'continue', 'reserve': reserve}
+
+
+plugin.add_option(
+    'reserve',
+    None,
+    'Absolute reserve to require from peers when accepting channels',
+)
+
+plugin.run()