Add comprehensive tests for role middleware and fix package dependencies

node_modules/@sinonjs/samsam/lib/create-matcher/assert-method-exists.js

@@ -0,0 +1,19 @@
+"use strict";
+
+/**
+ * Throws a TypeError when expected method doesn't exist
+ *
+ * @private
+ * @param {*} value A value to examine
+ * @param {string} method The name of the method to look for
+ * @param {name} name A name to use for the error message
+ * @param {string} methodPath The name of the method to use for error messages
+ * @throws {TypeError} When the method doesn't exist
+ */
+function assertMethodExists(value, method, name, methodPath) {
+    if (value[method] === null || value[method] === undefined) {
+        throw new TypeError(`Expected ${name} to have method ${methodPath}`);
+    }
+}
+
+module.exports = assertMethodExists;