added unit testing, and started implementing unit tests...phew

node_modules/@sinonjs/samsam/lib/iterable-to-string.js

@@ -0,0 +1,42 @@
+"use strict";
+
+var slice = require("@sinonjs/commons").prototypes.string.slice;
+var typeOf = require("@sinonjs/commons").typeOf;
+var valueToString = require("@sinonjs/commons").valueToString;
+
+module.exports = function iterableToString(obj) {
+    var representation = "";
+
+    function stringify(item) {
+        return typeof item === "string"
+            ? "'" + item + "'"
+            : valueToString(item);
+    }
+
+    function mapToString(map) {
+        /* eslint-disable-next-line local-rules/no-prototype-methods */
+        map.forEach(function(value, key) {
+            representation +=
+                "[" + stringify(key) + "," + stringify(value) + "],";
+        });
+
+        representation = slice(representation, 0, -1);
+        return representation;
+    }
+
+    function genericIterableToString(iterable) {
+        /* eslint-disable-next-line local-rules/no-prototype-methods */
+        iterable.forEach(function(value) {
+            representation += stringify(value) + ",";
+        });
+
+        representation = slice(representation, 0, -1);
+        return representation;
+    }
+
+    if (typeOf(obj) === "map") {
+        return mapToString(obj);
+    }
+
+    return genericIterableToString(obj);
+};