1 files changed, 12 insertions, 0 deletions

diff --git a/src/mailman/rules/tests/test_dmarc.py b/src/mailman/rules/tests/test_dmarc.py
index df5127895..7748343eb 100644
--- a/src/mailman/rules/tests/test_dmarc.py
+++ b/src/mailman/rules/tests/test_dmarc.py
@@ -173,6 +173,18 @@ To: ant@example.com
             'anne@example.info (_dmarc.example.info). '
             'Abstract base class shared by all dnspython exceptions.\n')
 
+    def test_parser(self):
+        data_file = resource_filename(
+            'mailman.rules.tests.data', 'org_domain.txt')
+        dmarc.parse_suffix_list(data_file)
+        # There is no entry for example.biz because that line starts with
+        # whitespace.
+        self.assertNotIn('biz.example', self.cache)
+        # The file had !city.kobe.jp so the flag says there's an exception.
+        self.assertTrue(self.cache['jp.kobe.city'])
+        # The file had *.kobe.jp so there's no exception.
+        self.assertFalse(self.cache['jp.kobe.*'])
+
 
 # New in Python 3.5.
 try: