The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

    http://creativecommons.org/publicdomain/zero/1.0/ */

 /**

  * Check that simple JS can be parsed and cached with the reflection API.

  */

 function test() {

   let { Parser } = Cu.import("resource:///modules/devtools/Parser.jsm", {});

   let source = "let x = 42;";

   let parser = new Parser();

   let first = parser.get(source);

   let second = parser.get(source);

   isnot(first, second,

     "The two syntax trees should be different.");

   let third = parser.get(source, "url");

   let fourth = parser.get(source, "url");

   isnot(first, third,

     "The new syntax trees should be different than the old ones.");

   is(third, fourth,

     "The new syntax trees were cached once an identifier was specified.");

   is(parser.errors.length, 0,

     "There should be no errors logged when parsing.");

   finish();

 }