1 files changed, 35 insertions, 0 deletions
diff --git a/tests/bot/cogs/test_antispam.py b/tests/bot/cogs/test_antispam.py
new file mode 100644
index 000000000..ce5472c71
--- /dev/null
+++ b/tests/bot/cogs/test_antispam.py
@@ -0,0 +1,35 @@
+import unittest
+
+from bot.cogs import antispam
+
+
+class AntispamConfigurationValidationTests(unittest.TestCase):
+    """Tests validation of the antispam cog configuration."""
+
+    def test_default_antispam_config_is_valid(self):
+        """The default antispam configuration is valid."""
+        validation_errors = antispam.validate_config()
+        self.assertEqual(validation_errors, {})
+
+    def test_unknown_rule_returns_error(self):
+        """Configuring an unknown rule returns an error."""
+        self.assertEqual(
+            antispam.validate_config({'invalid-rule': {}}),
+            {'invalid-rule': "`invalid-rule` is not recognized as an antispam rule."}
+        )
+
+    def test_missing_keys_returns_error(self):
+        """Not configuring required keys returns an error."""
+        keys = (('interval', 'max'), ('max', 'interval'))
+        for configured_key, unconfigured_key in keys:
+            with self.subTest(
+                configured_key=configured_key,
+                unconfigured_key=unconfigured_key
+            ):
+                config = {'burst': {configured_key: 10}}
+                error = f"Key `{unconfigured_key}` is required but not set for rule `burst`"
+
+                self.assertEqual(
+                    antispam.validate_config(config),
+                    {'burst': error}
+                )