pytest: detect warnings, too.

Since we turned many errors into warnings, we want our tests to fail
when they happen unexpectedly.  We make WARNING clear in the strings
we print, too, to help out.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

contrib/pyln-testing/pyln/testing/fixtures.py

@@ -229,6 +229,7 @@ def map_node_error(nodes, f, msg):
     map_node_error(nf.nodes, printValgrindErrors, "reported valgrind errors")
     map_node_error(nf.nodes, printCrashLog, "had crash.log files")
     map_node_error(nf.nodes, lambda n: not n.allow_broken_log and n.daemon.is_in_log(r'\*\*BROKEN\*\*'), "had BROKEN messages")
+    map_node_error(nf.nodes, lambda n: not n.allow_warning and n.daemon.is_in_log(r' WARNING:'), "had warning messages")
     map_node_error(nf.nodes, checkReconnect, "had unexpected reconnections")
     map_node_error(nf.nodes, checkBadGossip, "had bad gossip messages")
     map_node_error(nf.nodes, lambda n: n.daemon.is_in_log('Bad reestablish'), "had bad reestablish")

contrib/pyln-testing/pyln/testing/utils.py

@@ -618,15 +618,19 @@ def call(self, method, payload=None):
 
 class LightningNode(object):
     def __init__(self, node_id, lightning_dir, bitcoind, executor, valgrind, may_fail=False,
-                 may_reconnect=False, allow_broken_log=False,
-                 allow_bad_gossip=False, db=None, port=None, disconnect=None, random_hsm=None, options=None,
+                 may_reconnect=False,
+                 allow_broken_log=False,
+                 allow_warning=False,
+                 allow_bad_gossip=False,
+                 db=None, port=None, disconnect=None, random_hsm=None, options=None,
                  **kwargs):
         self.bitcoin = bitcoind
         self.executor = executor
         self.may_fail = may_fail
         self.may_reconnect = may_reconnect
         self.allow_broken_log = allow_broken_log
         self.allow_bad_gossip = allow_bad_gossip
+        self.allow_warning = allow_warning
         self.db = db
 
         # Assume successful exit
@@ -1203,6 +1207,7 @@ def split_options(self, opts):
             'disconnect',
             'may_fail',
             'allow_broken_log',
+            'allow_warning',
             'may_reconnect',
             'random_hsm',
             'feerates',

lightningd/peer_control.c

@@ -396,7 +396,7 @@ void channel_errmsg(struct channel *channel,
 	 * and we would close the channel on them.  We now support warnings
 	 * for this case. */
 	if (warning) {
-		channel_fail_reconnect_later(channel, "%s: (ignoring) %s",
+		channel_fail_reconnect_later(channel, "%s WARNING: %s",
 					     channel->owner->name, desc);
 		return;
 	}

tests/test_closing.py

@@ -2523,7 +2523,10 @@ def test_shutdown(node_factory):
 @flaky
 @unittest.skipIf(not DEVELOPER, "needs to set upfront_shutdown_script")
 def test_option_upfront_shutdown_script(node_factory, bitcoind, executor):
-    l1 = node_factory.get_node(start=False)
+    # There's a workaround in channeld, that it treats incoming errors
+    # before both sides are locked in as warnings; this happens in
+    # this test, so l1 reports the error as a warning!
+    l1 = node_factory.get_node(start=False, allow_warning=True)
     # Insist on upfront script we're not going to match.
     l1.daemon.env["DEV_OPENINGD_UPFRONT_SHUTDOWN_SCRIPT"] = "76a91404b61f7dc1ea0dc99424464cc4064dc564d91e8988ac"
     l1.start()

tests/test_connection.py

@@ -1956,8 +1956,10 @@ def test_update_fee(node_factory, bitcoind):
 
 @unittest.skipIf(not DEVELOPER, "needs DEVELOPER=1")
 def test_fee_limits(node_factory, bitcoind):
-    l1, l2, l3, l4 = node_factory.get_nodes(4, opts=[{'dev-max-fee-multiplier': 5, 'may_reconnect': True},
-                                                     {'dev-max-fee-multiplier': 5, 'may_reconnect': True},
+    l1, l2, l3, l4 = node_factory.get_nodes(4, opts=[{'dev-max-fee-multiplier': 5, 'may_reconnect': True,
+                                                      'allow_warning': True},
+                                                     {'dev-max-fee-multiplier': 5, 'may_reconnect': True,
+                                                      'allow_warning': True},
                                                      {'ignore-fee-limits': True, 'may_reconnect': True},
                                                      {}])
 

tests/test_misc.py

@@ -1336,7 +1336,7 @@ def test_bitcoind_goes_backwards(node_factory, bitcoind):
 @flaky
 def test_reserve_enforcement(node_factory, executor):
     """Channeld should disallow you spending into your reserve"""
-    l1, l2 = node_factory.line_graph(2, opts={'may_reconnect': True})
+    l1, l2 = node_factory.line_graph(2, opts={'may_reconnect': True, 'allow_warning': True})
 
     # Pay 1000 satoshi to l2.
     l1.pay(l2, 1000000)

tests/test_pay.py

@@ -234,7 +234,8 @@ def test_pay0(node_factory):
 def test_pay_disconnect(node_factory, bitcoind):
     """If the remote node has disconnected, we fail payment, but can try again when it reconnects"""
     l1, l2 = node_factory.line_graph(2, opts={'dev-max-fee-multiplier': 5,
-                                              'may_reconnect': True})
+                                              'may_reconnect': True,
+                                              'allow_warning': True})
 
     # Dummy payment to kick off update_fee messages
     l1.pay(l2, 1000)
@@ -261,7 +262,7 @@ def test_pay_disconnect(node_factory, bitcoind):
     l1.set_feerates((10**6, 1000**6, 1000**6, 1000**6), False)
 
     # Wait for l1 notice
-    l1.daemon.wait_for_log(r'Peer transient failure in CHANNELD_NORMAL: channeld: .*: update_fee \d+ outside range 1875-75000')
+    l1.daemon.wait_for_log(r'Peer transient failure in CHANNELD_NORMAL: channeld WARNING: .*: update_fee \d+ outside range 1875-75000')
 
     # Make l2 fail hard.
     l2.rpc.close(l1.info['id'], unilateraltimeout=1)

tests/test_plugin.py

@@ -398,11 +398,16 @@ def test_plugin_connected_hook_chaining(node_factory):
     l1 is configured to accept connections from l2, but not from l3.
     we check that logger_a is always called and logger_b only for l2.
     """
-    opts = [{'plugin': [
-        os.path.join(os.getcwd(), 'tests/plugins/peer_connected_logger_a.py'),
-        os.path.join(os.getcwd(), 'tests/plugins/reject.py'),
-        os.path.join(os.getcwd(), 'tests/plugins/peer_connected_logger_b.py'),
-    ]}, {}, {}]
+    opts = [{'plugin':
+             [os.path.join(os.getcwd(),
+                           'tests/plugins/peer_connected_logger_a.py'),
+              os.path.join(os.getcwd(),
+                           'tests/plugins/reject.py'),
+              os.path.join(os.getcwd(),
+                           'tests/plugins/peer_connected_logger_b.py')],
+             'allow_warning': True},
+            {},
+            {'allow_warning': True}]
 
     l1, l2, l3 = node_factory.get_nodes(3, opts=opts)
     l2id = l2.info['id']