assertOrder(X_GT_Y, "1.0m-1", "1.0");
    }

    @Test
    void testUnknownQualifierOrdering() {
        assertOrder(X_LT_Y, "1-abc", "1-abcd");
        assertOrder(X_LT_Y, "1-abc", "1-bcd");
        assertOrder(X_GT_Y, "1-abc", "1-aac");
    }

    @Test
    void testCaseInsensitiveOrderingOfQualifiers() {
        assertOrder(X_EQ_Y, "1.alpha", "1.ALPHA");

    // These have a combination of invalid length, unrecognized characters and wrong padding.
    assertFailsToDecode(base64(), "AB=C", "Unrecognized character: =");
    assertFailsToDecode(base64(), "A=BCD", "Invalid input length 5");
    assertFailsToDecode(base64(), "?", "Invalid input length 1");
  }

  public void testBase64CannotUpperCase() {
    assertThrows(IllegalStateException.class, () -> base64().upperCase());

    // These have a combination of invalid length, unrecognized characters and wrong padding.
    assertFailsToDecode(base64(), "AB=C", "Unrecognized character: =");
    assertFailsToDecode(base64(), "A=BCD", "Invalid input length 5");
    assertFailsToDecode(base64(), "?", "Invalid input length 1");
  }

  public void testBase64CannotUpperCase() {
    assertThrows(IllegalStateException.class, () -> base64().upperCase());

	s   string
	sep string
	n   int
	a   []string
}

var splittests = []SplitTest{
	{"", "", -1, []string{}},
	{abcd, "a", 0, nil},
	{abcd, "", 2, []string{"a", "bcd"}},
	{abcd, "a", -1, []string{"", "bcd"}},
	{abcd, "z", -1, []string{"abcd"}},
	{abcd, "", -1, []string{"a", "b", "c", "d"}},
	{commas, ",", -1, []string{"1", "2", "3", "4"}},
	{dots, "...", -1, []string{"1", ".2", ".3", ".4"}},

  }

  public void testLimitFixedLength() {
    String simple = "abcd";
    Iterable<String> letters = Splitter.fixedLength(1).limit(2).split(simple);
    assertThat(letters).containsExactly("a", "bcd").inOrder();
  }

  public void testLimit1Separator() {
    String simple = "a,b,c,d";
    Iterable<String> items = COMMA_SPLITTER.limit(1).split(simple);
    assertThat(items).containsExactly("a,b,c,d").inOrder();