Test for invalid address handling

tests/test_ban.py

@@ -40,3 +40,22 @@ def test_ban_ipv4(client, mocker):
                           headers={"Authorization": "Basic " + valid_credentials})
 
     assert response.json['operation'] == 'add'
+
+def test_ban_invalid(client, mocker):
+    def noop():
+        pass
+    run_res = SimpleNamespace()
+    run_res.stdout = b''
+    run_res.stderr = b'1/1 addresses added.\n'
+    run_res.returncode = 0
+    run_res.check_returncode = noop
+
+    mocker.patch('jail2ban.pfctl.run', return_value=run_res)
+
+    valid_credentials = base64.b64encode(b"test.example.com:testpassword").decode("utf-8")
+    json_payload = {"name": "sshd", "ip": "not:an::addr:ess"}
+    response = client.put("/ban",
+                          json=json_payload,
+                          headers={"Authorization": "Basic " + valid_credentials})
+
+    assert response.json['error'] == "'not:an::addr:ess' does not appear to be an IPv4 or IPv6 address"