moved hash funciton into a module for better testings

node_modules/connect-architect/connect.session/session/hash.js

@@ -0,0 +1,18 @@
+var crc32 = require('buffer-crc32');
+
+/**
+ * Hash the given `sess` object omitting changes
+ * to `.cookie`.
+ *
+ * @param {Object} sess
+ * @return {String}
+ * @api private
+ */
+
+function hash(sess) {
+  return crc32.signed(JSON.stringify(sess, function(key, val){
+    if ('cookie' != key) return val;
+  }));
+}
+
+module.exports.hash = hash;