Add comprehensive tests for role middleware and fix package dependencies

node_modules/@sinonjs/samsam/lib/get-class.js

@@ -0,0 +1,18 @@
+"use strict";
+
+var toString = require("@sinonjs/commons").prototypes.object.toString;
+
+/**
+ * Returns the internal `Class` by calling `Object.prototype.toString`
+ * with the provided value as `this`. Return value is a `String`, naming the
+ * internal class, e.g. "Array"
+ *
+ * @private
+ * @param  {*} value - Any value
+ * @returns {string} - A string representation of the `Class` of `value`
+ */
+function getClass(value) {
+    return toString(value).split(/[ \]]/)[1];
+}
+
+module.exports = getClass;