assertEquals("abcd", normalizer.normalize("ａｂｃｄ", null));
        assertEquals("みかん", normalizer.normalize("みかん", null));
        assertEquals("みかん ﾘﾝｺﾞ", normalizer.normalize("みかん　リンゴ", null));
    }

    public void test_AnyLower() {
        ICUNormalizer normalizer = new ICUNormalizer("Any-Lower");
        assertEquals("abcd", normalizer.normalize("ABCD", null));
    }

	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"}},

        // Test case 1: Standard padding
        final byte[] data1 = "abc".getBytes();
        assertEquals("YWJj", Base64Util.encode(data1));

        // Test case 2: Single padding
        final byte[] data2 = "abcd".getBytes();
        assertEquals("YWJjZA==", Base64Util.encode(data2));

        // Test case 3: Double padding
        final byte[] data3 = "abcde".getBytes();
        assertEquals("YWJjZGU=", Base64Util.encode(data3));

			testRemaining{0, 0},
		},
	}, {
		maker: makeSparse{makeReg{4, "abcd"}, sparseHoles{{2, 3}}, 8},
		tests: []testFnc{
			testReadFrom{fileOps{"ab", int64(3), "cd"}, 7, io.ErrUnexpectedEOF},
			testRemaining{1, 0},
		},
	}, {
		maker: makeSparse{makeReg{4, "abcd"}, sparseHoles{{2, 3}}, 8},
		tests: []testFnc{
			testReadFrom{fileOps{"ab", int64(3), "cde"}, 7, errMissData},