Move test_test_config to a cmd-focused test suite

Testing configs got a lot more complicated with config repos, so it
isn't buried in the scheduler anymore. We should still test the somewhat
minimal facilities that exist now though.

Change-Id: I0850e449faad6519ed8857d8f015cef3560eb509
Story: 2000773
Task: 4194

tests/unit/test_scheduler.py

@@ -2164,12 +2164,6 @@ class TestScheduler(ZuulTestCase):
         self.assertEqual(set(['project-test-nomatch-starts-empty',
                               'project-test-nomatch-starts-full']), run_jobs)
 
-    @skip("Disabled for early v3 development")
-    def test_test_config(self):
-        "Test that we can test the config"
-        self.sched.testConfig(self.config.get('zuul', 'tenant_config'),
-                              self.connections)
-
     def test_queue_names(self):
         "Test shared change queue names"
         tenant = self.sched.abide.tenants.get('tenant-one')

tests/unit/test_scheduler_cmd.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import os
+
+import testtools
+import zuul.cmd.scheduler
+
+from tests import base
+
+
+class TestSchedulerCmdArguments(testtools.TestCase):
+
+    def setUp(self):
+        super(TestSchedulerCmdArguments, self).setUp()
+        self.app = zuul.cmd.scheduler.Scheduler()
+
+    def test_test_config(self):
+        conf_path = os.path.join(base.FIXTURE_DIR, 'zuul.conf')
+        self.app.parse_arguments(['-t', '-c', conf_path])
+        self.assertTrue(self.app.args.validate)
+        self.app.read_config()
+        self.assertEqual(0, self.app.test_config())

zuul/cmd/scheduler.py

@@ -40,7 +40,7 @@ class Scheduler(zuul.cmd.ZuulApp):
         super(Scheduler, self).__init__()
         self.gear_server_pid = None
 
-    def parse_arguments(self):
+    def parse_arguments(self, args=None):
         parser = argparse.ArgumentParser(description='Project gating system.')
         parser.add_argument('-c', dest='config',
                             help='specify the config file')
@@ -52,7 +52,7 @@ class Scheduler(zuul.cmd.ZuulApp):
         parser.add_argument('--version', dest='version', action='version',
                             version=self._get_version(),
                             help='show zuul version')
-        self.args = parser.parse_args()
+        self.args = parser.parse_args(args)
 
     def reconfigure_handler(self, signum, frame):
         signal.signal(signal.SIGHUP, signal.SIG_IGN)