pytest: Check description of newly created invoices

CHANGELOG.md

@@ -59,6 +59,8 @@ changes.
   to be compatible with eclair and lnd (#1730).
 - JSON API: `listnodes`: now correctly prints `addresses` if more than
   one is advertised.
+- Failing tests no longer delete the test directory, to allow easier debugging
+  (Issue: #1599)
 
 ### Security
 

tests/test_lightningd.py

@@ -445,14 +445,16 @@ class LightningDTests(BaseLightningDTests):
         start_time = time.time()
         l1.rpc.autocleaninvoice(cycle_seconds=8, expired_by=2)
 
-        l1.rpc.invoice(msatoshi=12300, label='inv1', description='1', expiry=4)
-        l1.rpc.invoice(msatoshi=12300, label='inv2', description='2', expiry=12)
+        l1.rpc.invoice(msatoshi=12300, label='inv1', description='description1', expiry=4)
+        l1.rpc.invoice(msatoshi=12300, label='inv2', description='description2', expiry=12)
 
         # time 0
         # Both should still be there.
         assert len(l1.rpc.listinvoices('inv1')['invoices']) == 1
         assert len(l1.rpc.listinvoices('inv2')['invoices']) == 1
 
+        assert l1.rpc.listinvoices('inv1')['invoices'][0]['description'] == 'description1'
+
         time.sleep(start_time - time.time() + 6)   # total 6
         # Both should still be there - auto clean cycle not started.
         # inv1 should be expired