jiridanek commented on a change in pull request #966:
URL: https://github.com/apache/qpid-dispatch/pull/966#discussion_r547417909



##########
File path: tests/system_tests_bad_configuration.py
##########
@@ -112,11 +113,11 @@ def wait_for_unresolvable_host(self):
         with open('../setUpClass/test-router.log', 'r') as router_log:
             log_lines = router_log.read().split("\n")
             expected_errors = [
-                "proton:io Name or service not known",  # Linux
-                "proton:io unknown node or service",  # macOS
+                "Connection to %s" % self.unresolvable_host_name

Review comment:
       Such error message does not necessarily has to be caused by unresolvable 
host.
   
   When I was looking into this due to the bubblewrap problem, I was thinking 
that maybe I should skip the test if I get a failure when contacting a DNS 
server (because without working DNS I can't properly test the unresolvable host 
scenario). In the end I was able to get the test pass without modifying it.
   
   I guess this change is OK, I believe the changed test is able to catch 
pretty much the same bugs it could previously.

##########
File path: tests/system_tests_bad_configuration.py
##########
@@ -112,11 +113,11 @@ def wait_for_unresolvable_host(self):
         with open('../setUpClass/test-router.log', 'r') as router_log:
             log_lines = router_log.read().split("\n")
             expected_errors = [
-                "proton:io Name or service not known",  # Linux
-                "proton:io unknown node or service",  # macOS
+                "Connection to %s" % self.unresolvable_host_name
             ]
             errors_caught = [line for line in log_lines
-                             if any([expected_error in line for expected_error 
in expected_errors])]
+                             if any([expected_error in line for expected_error 
in expected_errors])
+                             and "failed" in line]

Review comment:
       If you turn `expected_errors` list above into single `expected_error` 
value, you can then simplify this into
   
   ```suggestion
                                if expected_error in line and "failed" in line]
   ```




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