unit tests, and some cleaning up

node_modules/querystringify/index.js

@@ -0,0 +1,88 @@
+'use strict';
+
+var has = Object.prototype.hasOwnProperty
+  , undef;
+
+/**
+ * Decode a URI encoded string.
+ *
+ * @param {String} input The URI encoded string.
+ * @returns {String} The decoded string.
+ * @api private
+ */
+function decode(input) {
+  return decodeURIComponent(input.replace(/\+/g, ' '));
+}
+
+/**
+ * Simple query string parser.
+ *
+ * @param {String} query The query string that needs to be parsed.
+ * @returns {Object}
+ * @api public
+ */
+function querystring(query) {
+  var parser = /([^=?&]+)=?([^&]*)/g
+    , result = {}
+    , part;
+
+  while (part = parser.exec(query)) {
+    var key = decode(part[1])
+      , value = decode(part[2]);
+
+    //
+    // Prevent overriding of existing properties. This ensures that build-in
+    // methods like `toString` or __proto__ are not overriden by malicious
+    // querystrings.
+    //
+    if (key in result) continue;
+    result[key] = value;
+  }
+
+  return result;
+}
+
+/**
+ * Transform a query string to an object.
+ *
+ * @param {Object} obj Object that should be transformed.
+ * @param {String} prefix Optional prefix.
+ * @returns {String}
+ * @api public
+ */
+function querystringify(obj, prefix) {
+  prefix = prefix || '';
+
+  var pairs = []
+    , value
+    , key;
+
+  //
+  // Optionally prefix with a '?' if needed
+  //
+  if ('string' !== typeof prefix) prefix = '?';
+
+  for (key in obj) {
+    if (has.call(obj, key)) {
+      value = obj[key];
+
+      //
+      // Edge cases where we actually want to encode the value to an empty
+      // string instead of the stringified value.
+      //
+      if (!value && (value === null || value === undef || isNaN(value))) {
+        value = '';
+      }
+
+      pairs.push(encodeURIComponent(key) +'='+ encodeURIComponent(value));
+    }
+  }
+
+  return pairs.length ? prefix + pairs.join('&') : '';
+}
+
+//
+// Expose the module.
+//
+exports.stringify = querystringify;
+exports.parse = querystring;