UpperTest.java

  public void testFunctions2() {
    Map<String, Object> scopes = new HashMap<String, Object>();
    scopes.put("map", new HashMap<String, String>(){{put("key", "value");}});
    final Function<String, String> upperFunction = new Function<String, String>()
    {

      @Override
      public String apply(String aInput)
      {
        return aInput.toUpperCase();
      }
    };
    scopes.put("upper", upperFunction);


    Writer writer = new StringWriter();
    MustacheFactory mf = new DefaultMustacheFactory();
    Mustache mustache = mf.compile(new StringReader("map.key={{map.key}}{{#upper}}, in #upper map.key={{map.key}}{{/upper}} \n" +
            "in #map{{#map}}, in #upper {{#upper}} keyInUpper={{key}} {{/upper}} {{/map}} "), "example");

    mustache.execute(writer, scopes);
    try
    {
      writer.flush();
    }
    catch (IOException e)
    {
      //
    }
    assertEquals("map.key=value, IN #UPPER MAP.KEY=VALUE \nin #map, in #upper  KEYINUPPER=VALUE   ", writer.toString());
  }

I tried and it does not work. I discovered I'm not using the last version of mustach. I used mustache 0.8.4, jdk 1.6 and guava 14.0-rc3. When I used 0.8.10, it works. Sorry.