--- /dev/null
+'use strict';
+var path = require('path');
+var pathIsInside = require('path-is-inside');
+
+module.exports = function (a, b) {
+ a = path.resolve(a);
+ b = path.resolve(b);
+
+ if (a === b) {
+ return false;
+ }
+
+ return pathIsInside(a, b);
+};