### Question:
UrlUtils { public static boolean isUrl(String url) { String trimmedUrl = url.trim(); if (trimmedUrl.contains(" ")) { return false; } return trimmedUrl.contains(".") || trimmedUrl.contains(":"); }  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 testIsUrl() { assertTrue(UrlUtils.isUrl("http: assertTrue(UrlUtils.isUrl("https: assertTrue(UrlUtils.isUrl("https: assertTrue(UrlUtils.isUrl(" https: assertTrue(UrlUtils.isUrl(" https: assertTrue(UrlUtils.isUrl("https: assertTrue(UrlUtils.isUrl("file: assertTrue(UrlUtils.isUrl("mozilla.org")); assertFalse(UrlUtils.isUrl("Hello World")); assertFalse(UrlUtils.isUrl("Mozilla")); }