### Question:
UrlUtils { public static boolean isInternalErrorURL(final String url) { return "data:text/html;charset=utf-8;base64,".equals(url); }  static String normalize(@NonNull String input); static boolean isUrl(String url); static boolean isValidSearchQueryUrl(String url); static boolean isHttpOrHttps(String url); static boolean isSearchQuery(String text); static String createSearchUrl(Context context, String searchTerm); static String stripUserInfo(@Nullable String url); static boolean isPermittedResourceProtocol(@Nullable final String scheme); static boolean isSupportedProtocol(@Nullable final String scheme); static boolean isInternalErrorURL(final String url); static boolean urlsMatchExceptForTrailingSlash(final @NonNull String url1, final @NonNull String url2); static String stripCommonSubdomains(@Nullable String host); static boolean isLocalizedContent(@Nullable String url);  }### Answer:
@Test public void isInternalErrorURL() { assertTrue(UrlUtils.isInternalErrorURL("data:text/html;charset=utf-8;base64,")); assertFalse(UrlUtils.isInternalErrorURL("http: assertFalse(UrlUtils.isInternalErrorURL("https: assertFalse(UrlUtils.isInternalErrorURL("www.mozilla.org")); assertFalse(UrlUtils.isInternalErrorURL("error:-8")); assertFalse(UrlUtils.isInternalErrorURL("hello world")); }