Add comprehensive tests for role middleware and fix package dependencies

node_modules/sinon/lib/sinon/throw-on-falsy-object.js

@@ -0,0 +1,13 @@
+"use strict";
+const valueToString = require("@sinonjs/commons").valueToString;
+
+function throwOnFalsyObject(object, property) {
+    if (property && !object) {
+        const type = object === null ? "null" : "undefined";
+        throw new Error(
+            `Trying to stub property '${valueToString(property)}' of ${type}`
+        );
+    }
+}
+
+module.exports = throwOnFalsyObject;