public void testMinusOperatorWithoutSpace() {
    String str = "length == $c.length -1";

    ParserConfiguration pconf = new ParserConfiguration();
    ParserContext pctx = new ParserContext(pconf);
    ExecutableStatement stmt = (ExecutableStatement) MVEL.compileExpression(str, pctx);
    Column col1 = new Column("x", 0);
    Column col2 = new Column("x", 0);
    Map<String, Object> vars = new HashMap<String, Object>();
    vars.put("$c", col2);
    Boolean result = (Boolean) MVEL.executeExpression(stmt, col1, vars);
    assertFalse(result);
  }