pytest: test Bitcoin plugin registration and the bcli plugin

tests/plugins/bitcoin/part2.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""
+This registers part of the Bitcoin backend methods.
+We only use it for testing startup and we don't care about the actual values.
+"""
+import time
+
+from pyln.client import Plugin
+
+
+plugin = Plugin()
+
+
+@plugin.method("sendrawtransaction")
+def sendtx(plugin, **kwargs):
+    time.sleep(1)
+    return {}
+
+
+@plugin.method("getutxout")
+def gettxout(plugin, **kwargs):
+    time.sleep(1)
+    return {}
+
+
+plugin.run()