@Test
    @DisplayName("Test appendCol helper method")
    void testAppendCol() {
        StringBuffer sb = new StringBuffer();

        // Test with short string
        ace.appendCol(sb, "test", 10);
        assertEquals("test      ", sb.toString());

        // Test with exact width string
        sb = new StringBuffer();
        ace.appendCol(sb, "exact", 5);
        assertEquals("exact", sb.toString());

     * @return The resolved string.
     */
    public static String resolve(final String value) {
        if (value == null) {
            return null;
        }

        final StringBuffer tunedText = new StringBuffer(value.length());
        final Pattern pattern = Pattern.compile("(\\$\\{([\\w\\.]+)\\})");
        final Matcher matcher = pattern.matcher(value);
        while (matcher.find()) {

            return null;
        }

        @Override
        public String getRequestURI() {
            return "/";
        }

        @Override
        public StringBuffer getRequestURL() {
            return new StringBuffer("http://localhost:8080/");
        }

        @Override
        public String getServletPath() {
            return "";
        }

        @Override

        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override
        public StringBuffer getRequestURL() {
            return new StringBuffer("http://localhost:8080" + requestURI);
        }

        @Override
        public String getServletPath() {
            return "";
        }

        @Override

            return null;
        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override
        public StringBuffer getRequestURL() {
            return null;
        }

        @Override
        public HttpSession getSession(boolean create) {
            return null;
        }

        @Override

    assertThat(ArbitraryInstances.get(StringBuilder.class).toString()).isEmpty();
    assertThat(ArbitraryInstances.get(StringBuffer.class).toString()).isEmpty();
    assertFreshInstanceReturned(
        ArrayList.class,
        HashMap.class,
        Appendable.class,
        StringBuilder.class,
        StringBuffer.class,
        Throwable.class,
        Exception.class);
  }

            resp.flushBuffer();
            return;
        } catch (final DfsReferral dr) {
            StringBuffer redir = req.getRequestURL();
            final String qs = req.getQueryString();
            final DfsReferralData refdata = dr.getData();
            redir = new StringBuffer(redir.substring(0, redir.length() - req.getPathInfo().length()));
            redir.append('/');

            }

            @Override
            public String getRequestURI() {
                return "/test";
            }

            @Override
            public StringBuffer getRequestURL() {
                return new StringBuffer("http://test");
            }

            @Override
            public String getServletPath() {
                return "";
            }

            @Override

    assertThat(ArbitraryInstances.get(StringBuilder.class).toString()).isEmpty();
    assertThat(ArbitraryInstances.get(StringBuffer.class).toString()).isEmpty();
    assertFreshInstanceReturned(
        ArrayList.class,
        HashMap.class,
        Appendable.class,
        StringBuilder.class,
        StringBuffer.class,
        Throwable.class,
        Exception.class);
  }

            resp.flushBuffer();
            return;
        } catch (final DfsReferral dr) {
            StringBuffer redir = req.getRequestURL();
            final String qs = req.getQueryString();
            redir = new StringBuffer(redir.substring(0, redir.length() - req.getPathInfo().length()));
            redir.append('/');
            redir.append(dr.server);