Fix incorrect config key in attachments antispam rule

The rule was incorrectly printing out the maximum amount of allowed attachments
instead of the configured interval. This commit also adjusts the rule's unit
test case.

2 files changed, 3 insertions, 3 deletions

diff --git a/bot/rules/attachments.py b/bot/rules/attachments.py
index 00bb2a949..8903c385c 100644
--- a/bot/rules/attachments.py
+++ b/bot/rules/attachments.py
@@ -19,7 +19,7 @@ async def apply(
 
     if total_recent_attachments > config['max']:
         return (
-            f"sent {total_recent_attachments} attachments in {config['max']}s",
+            f"sent {total_recent_attachments} attachments in {config['interval']}s",
             (last_message.author,),
             relevant_messages
         )
diff --git a/tests/bot/rules/test_attachments.py b/tests/bot/rules/test_attachments.py
index d7187f315..0af5ff0dc 100644
--- a/tests/bot/rules/test_attachments.py
+++ b/tests/bot/rules/test_attachments.py
@@ -20,7 +20,7 @@ class AttachmentRuleTests(unittest.TestCase):
     """Tests applying the `attachments` antispam rule."""
 
     def setUp(self):
-        self.config = {"max": 5}
+        self.config = {"max": 5, "interval": 10}
 
     @async_test
     async def test_allows_messages_without_too_many_attachments(self):
@@ -88,7 +88,7 @@ class AttachmentRuleTests(unittest.TestCase):
                 config=self.config
             ):
                 desired_output = (
-                    f"sent {total_attachments} attachments in {self.config['max']}s",
+                    f"sent {total_attachments} attachments in {self.config['interval']}s",
                     culprit,
                     relevant_messages
                 )