// The following test vectors are specified in RFC 4648 itself
    testEncodingWithSeparators(base64(), "", "");
    testEncodingWithSeparators(base64(), "f", "Zg==");
    testEncodingWithSeparators(base64(), "fo", "Zm8=");
    testEncodingWithSeparators(base64(), "foo", "Zm9v");
    testEncodingWithSeparators(base64(), "foob", "Zm9vYg==");
    testEncodingWithSeparators(base64(), "fooba", "Zm9vYmE=");

    // The following test vectors are specified in RFC 4648 itself
    testEncodingWithSeparators(base64(), "", "");
    testEncodingWithSeparators(base64(), "f", "Zg==");
    testEncodingWithSeparators(base64(), "fo", "Zm8=");
    testEncodingWithSeparators(base64(), "foo", "Zm9v");
    testEncodingWithSeparators(base64(), "foob", "Zm9vYg==");
    testEncodingWithSeparators(base64(), "fooba", "Zm9vYmE=");

    assertEquals("fo...", Ascii.truncate("foobar", 5, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 6, "..."));
    assertEquals("...", Ascii.truncate("foobar", 3, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 10, "…"));
    assertEquals("foo…", Ascii.truncate("foobar", 4, "…"));
    assertEquals("fo--", Ascii.truncate("foobar", 4, "--"));

    assertEquals("fo...", Ascii.truncate("foobar", 5, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 6, "..."));
    assertEquals("...", Ascii.truncate("foobar", 3, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 10, "…"));
    assertEquals("foo…", Ascii.truncate("foobar", 4, "…"));
    assertEquals("fo--", Ascii.truncate("foobar", 4, "--"));

    Predicate<CharSequence> isFoobar = Predicates.containsPattern("^Fo.*o.*bar$");
    assertTrue(isFoobar.apply("Foxyzoabcbar"));
    assertFalse(isFoobar.apply("Foobarx"));
  }

  @GwtIncompatible // Predicates.containsPattern
  public void testContains_apply() {
    Predicate<CharSequence> isFoobar = Predicates.contains(Pattern.compile("^Fo.*o.*bar$"));

    assertTrue(isFoobar.apply("Foxyzoabcbar"));

   *
   * <p>Examples:
   *
   * {@snippet :
   * Ascii.truncate("foobar", 7, "..."); // returns "foobar"
   * Ascii.truncate("foobar", 5, "..."); // returns "fo..."
   * }
   *
   * <p><b>Note:</b> This method <i>may</i> work with certain non-ASCII text but is not safe for use
   * with arbitrary Unicode text. It is mostly intended for use with text that is known to be safe

        assertEquals("abc ", fessXpathTransformer.removeCommentTag("abc<!-- foo -->"));
        assertEquals("abc 123", fessXpathTransformer.removeCommentTag("abc<!-- fo\no -->123"));
        assertEquals("abc 123", fessXpathTransformer.removeCommentTag("abc<!--\n foo -->123"));
        assertEquals("abc 123", fessXpathTransformer.removeCommentTag("abc<!-- foo -->123"));

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pro.fj

// fk : https://www.iana.org/domains/root/db/fk.html
*.fk

// fm : https://www.iana.org/domains/root/db/fm.html
com.fm
edu.fm
net.fm
org.fm
fm

// fo : https://www.iana.org/domains/root/db/fo.html
fo

// fr : https://www.afnic.fr/ https://www.afnic.fr/wp-media/uploads/2022/12/afnic-naming-policy-2023-01-01.pdf
fr
asso.fr
com.fr
gouv.fr
nom.fr
prd.fr
tm.fr

florist
floro.no
florø.no
flowers
flt.cloud.muni.cz
flutterflow.app
fly
fly.dev
flå.no
fm
fm.br
fm.it
fm.jo
fm.no
fnc.fr-par.scw.cloud
fnd.br
fnwk.site
fo
foggia.it
folionetwork.site
folkebibl.no
folldal.no
foo
food
fool.jp
football
for-better.biz
for-more.biz
for-our.info
for-some.biz
for-the.biz
ford
forde.no