Testing the faulty case.

tests/test_init.py

@@ -1027,6 +1027,13 @@ def test_on_api_command(self, jsonify_mock):
             case["expectedMethod"].assert_called_with(*case["expectedArguments"])
             case["expectedOutcome"].assert_called_with(case["expectedPayload"])
 
+    @patch("flask.abort")
+    def test_on_api_command__exceptions(self, abort_mock):
+        # Should respond with a faulty HTTP code when handler raises
+        self.plugin_instance.handle_update_command = Mock(side_effect=Exception("Bad request"))
+        self.plugin_instance.on_api_command("update", {})
+        abort_mock.assert_called_with(400)
+
     @patch("flask.abort")
     def test_on_api_command__unknown(self, abort_mock):
         # Should respond with status code 400 (bad request) to unknown commands