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

node_modules/expand-brackets/lib/utils.js

@@ -0,0 +1,34 @@
+'use strict';
+
+var toRegex = require('to-regex');
+var regexNot = require('regex-not');
+var cached;
+
+/**
+ * Get the last element from `array`
+ * @param {Array} `array`
+ * @return {*}
+ */
+
+exports.last = function(arr) {
+  return arr[arr.length - 1];
+};
+
+/**
+ * Create and cache regex to use for text nodes
+ */
+
+exports.createRegex = function(pattern, include) {
+  if (cached) return cached;
+  var opts = {contains: true, strictClose: false};
+  var not = regexNot.create(pattern, opts);
+  var re;
+
+  if (typeof include === 'string') {
+    re = toRegex('^(?:' + include + '|' + not + ')', opts);
+  } else {
+    re = toRegex(not, opts);
+  }
+
+  return (cached = re);
+};