test: add check_node_connections in util

test/functional/feature_anchors.py

@@ -8,18 +8,12 @@ import os
 
 from test_framework.p2p import P2PInterface
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import check_node_connections
 
 INBOUND_CONNECTIONS = 5
 BLOCK_RELAY_CONNECTIONS = 2
 
 
-def check_node_connections(*, node, num_in, num_out):
-    info = node.getnetworkinfo()
-    assert_equal(info["connections_in"], num_in)
-    assert_equal(info["connections_out"], num_out)
-
-
 class AnchorsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1