Handle the case of pylint returning empty output

Author: hithwen

datadog_checks_dev/datadog_checks/dev/tooling/commands/validate/py3.py

@@ -31,7 +31,10 @@ def py3(check):
 
     echo_info(u"Validating python3 compatibility of {}...".format(check))
     cmd = ["pylint", "-f", "json", "--py3k", "-d", "W1618", "--persistent", "no", "--exit-zero", path_to_module]
-    results = json.loads(run_command(cmd, capture='stdout').stdout)
+    echo_info(u"\tRunning: {}".format(' '.join(cmd)))
+
+    output = run_command(cmd, capture='stdout', check=True).stdout
+    results = json.loads(output) if output else None
 
     if results:
         echo_failure(u"Incompatibilities were found for {}:".format(check))

gearmand/tests/test_integration.py

@@ -9,6 +9,7 @@
 from . import common
 
 
+@pytest.mark.integration
 def test_service_check_broken(check, aggregator):
     tags = ['server:{}'.format(common.HOST), 'port:{}'.format(common.BAD_PORT)] + common.TAGS2
 

gearmand/tests/test_integration_e2e.py

@@ -20,6 +20,7 @@ def assert_metrics(aggregator):
     aggregator.assert_all_metrics_covered()
 
 
+@pytest.mark.integration
 @pytest.mark.usefixtures("dd_environment")
 def test_metrics(check, aggregator):
     check.check(common.INSTANCE)