### Question:
UrlUtils { public static boolean isSupportedProtocol(@Nullable final String scheme) { return scheme != null && (isPermittedResourceProtocol(scheme) || scheme.startsWith("error")); }  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 isPermittedProtocol() { assertFalse(UrlUtils.isSupportedProtocol("")); assertFalse(UrlUtils.isSupportedProtocol(null)); assertTrue(UrlUtils.isSupportedProtocol("http")); assertTrue(UrlUtils.isSupportedProtocol("https")); assertTrue(UrlUtils.isSupportedProtocol("error")); assertTrue(UrlUtils.isSupportedProtocol("data")); assertFalse(UrlUtils.isSupportedProtocol("market")); }