Gulp and bower++, could break stuff

static/app/bower_components/bootstrap-datepicker/tests/assets/mock.js

@@ -0,0 +1,26 @@
+;(function(){
+
+window.patch_date = function patch(f){
+    var NativeDate = window.Date;
+    var date = function date(y,m,d,h,i,s,j){
+        switch(arguments.length){
+            case 0: return date.now ? new NativeDate(date.now) : new NativeDate();
+            case 1: return new NativeDate(y);
+            case 2: return new NativeDate(y,m);
+            case 3: return new NativeDate(y,m,d);
+            case 4: return new NativeDate(y,m,d,h);
+            case 5: return new NativeDate(y,m,d,h,i);
+            case 6: return new NativeDate(y,m,d,h,i,s);
+            case 7: return new NativeDate(y,y,m,d,h,i,s,j);
+        }
+    };
+    date.UTC = NativeDate.UTC;
+    return function(){
+        Array.prototype.push.call(arguments, date);
+        window.Date = date;
+        res = f.apply(this, arguments);
+        window.Date = NativeDate;
+    }
+}
+
+}());