Blocking server also blocks subdomains

tests/test_utils.py

@@ -0,0 +1,19 @@
+from unittest import mock
+
+import pytest
+
+from app.utils.url import is_hostname_blocked
+
+
+@pytest.mark.parametrize(
+    "hostname,should_be_blocked",
+    [
+        ("example.com", True),
+        ("subdomain.example.com", True),
+        ("example.xyz", False),
+    ],
+)
+def test_is_hostname_blocked(hostname: str, should_be_blocked: bool) -> None:
+    with mock.patch("app.utils.url.BLOCKED_SERVERS", ["example.com"]):
+        is_hostname_blocked.cache_clear()
+        assert is_hostname_blocked(hostname) is should_be_blocked