Test that --help returns the options we expect it to

tests/help_test.py

@@ -0,0 +1,19 @@
+import os
+import subprocess
+import sys
+import unittest
+
+import mopidy
+
+class HelpTest(unittest.TestCase):
+    def test_help_has_mopidy_options(self):
+        mopidy_dir = os.path.dirname(mopidy.__file__)
+        args = [sys.executable, mopidy_dir, '--help']
+        process = subprocess.Popen(args, stdout=subprocess.PIPE)
+        output = process.communicate()[0]
+        self.assert_('--version' in output)
+        self.assert_('--help' in output)
+        self.assert_('--quiet' in output)
+        self.assert_('--verbose' in output)
+        self.assert_('--save-debug-log' in output)
+        self.assert_('--list-settings' in output)