### Question:
OAuthUtils { public static OAuthProblemException handleNotAllowedParametersOAuthException( List<String> notAllowedParams) { StringBuffer sb = new StringBuffer("Not allowed parameters: "); if (notAllowedParams != null) { for (String notAllowed : notAllowedParams) { sb.append(notAllowed).append(" "); } } return handleOAuthProblemException(sb.toString().trim()); }  static String format(
        final Collection<? extends Map.Entry<String, Object>> parameters,
        final String encoding); static String saveStreamAsString(InputStream is); static String toString(
        final InputStream is, final String defaultCharset); static OAuthProblemException handleOAuthProblemException(String message); static OAuthProblemException handleMissingParameters(Set<String> missingParams); static OAuthProblemException handleBadContentTypeException(String expectedContentType); static OAuthProblemException handleNotAllowedParametersOAuthException(
        List<String> notAllowedParams); static Map<String, Object> decodeForm(String form); static boolean isFormEncoded(String contentType); static String decodePercent(String s); static String percentEncode(String s); static T instantiateClass(Class<T> clazz); static T instantiateClassWithParameters(Class<T> clazz, Class<?>[] paramsTypes,
                                                       Object[] paramValues); static String getAuthHeaderField(String authHeader); static Map<String, String> decodeOAuthHeader(String header); static String[] decodeClientAuthenticationHeader(String authenticationHeader); static String encodeOAuthHeader(Map<String, Object> entries); static String encodeAuthorizationBearerHeader(Map<String, Object> entries); static boolean isEmpty(String value); static boolean hasEmptyValues(String[] array); static String getAuthzMethod(String header); static Set<String> decodeScopes(String s); static String encodeScopes(Set<String> s); static boolean isMultipart(HttpServletRequest request); static boolean hasContentType(String requestContentType, String requiredContentType); static final String AUTH_SCHEME; static final String MULTIPART; }### Answer:
@Test public void testHandleNotAllowedParametersOAuthException() throws Exception { List<String> notAllowedParametersList = new LinkedList<String>(); notAllowedParametersList.add("Parameter1"); notAllowedParametersList.add("Parameter2"); OAuthProblemException exception = OAuthUtils.handleNotAllowedParametersOAuthException(notAllowedParametersList); assertEquals("Not allowed parameters: Parameter1 Parameter2", exception.getDescription()); }