}
                }
            }
            url = buf.toString();
        } else if (url.startsWith("file:")) {
            // file, smb/ftp->http
            url = updateFileProtocol(url);

            if (encodeUrlLink) {
                return appendQueryParameter(document, url);
            }

            // decode
            if (!isSmbOrFtpUrl) {
                // file

        userAgentHelper = new UserAgentHelper() {
            public UserAgentType getUserAgentType() {
                return UserAgentType.CHROME;
            }
        };
        ComponentUtil.register(userAgentHelper, "userAgentHelper");

        assertEquals("file://test.txt", viewHelper.updateFileProtocol("file:///test.txt"));