Test when pfctl fails for another reason than an nonexisting table

jail2ban/__init__.py

@@ -191,6 +191,8 @@ def create_app():
         Show a json parsable error if the value is illegal
         '''
         app.logger.fatal(error)
+        app.logger.fatal('stdout: %s', error.stderr)
+        app.logger.fatal('stderr: %s', error.stderr)
         return jsonify({'error': str(error)}), 500
 
     @app.errorhandler(FileNotFoundError)

tests/test_list.py

@@ -109,3 +109,32 @@ def test_list_nonexistent_table(client, mocker, valid_credentials):
     assert response.status_code == 404
     assert response.json['error'] == "'nonexistent' is not " \
                                      "a known fail2ban jail"
+
+def test_list_wrong_table_name(client, mocker, valid_credentials):
+    '''
+    Test for an wrong table name that lets pfctl fail. should result in a 500
+    '''
+    def noop():
+        pass
+
+    run_res = SimpleNamespace()
+    run_res.stdout = b''
+    run_res.stderr = b'No ALTQ support in kernel\nALTQ related functions disabled\n' \
+            b'pfctl: Invalid argument.\n'
+    run_res.returncode = 255
+    run_res.check_returncode = noop
+
+    mocker.patch('jail2ban.pfctl.run',
+                 return_value=run_res,
+                 side_effect=CalledProcessError(run_res.returncode,
+                                                'foobar',
+                                                 output=run_res.stdout,
+                                                 stderr=run_res.stderr)
+                 )
+
+    response = client.get("/list/notanerrorbuttestneedstofail",
+                          headers={"Authorization":
+                                   "Basic " + valid_credentials})
+
+    assert response.status_code == 500
+    assert response.json['error'] == "Command 'foobar' returned non-zero exit status 255."