assertEquals("6", "a\\nb", StringUtil.replace("a\nb", "\n", "\\n"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testSplit() throws Exception {
        final String[] array = StringUtil.split("aaa\nbbb", "\n");
        assertEquals("1", 2, array.length);
        assertEquals("2", "aaa", array[0]);
        assertEquals("3", "bbb", array[1]);

	{"123", "", 17, []string{"1", "2", "3"}},
	{"bT", "T", math.MaxInt / 4, []string{"b", ""}},
	{"\xff-\xff", "", -1, []string{"\xff", "-", "\xff"}},
	{"\xff-\xff", "-", -1, []string{"\xff", "\xff"}},
}

func TestSplit(t *testing.T) {
	for _, tt := range splittests {
		a := SplitN([]byte(tt.s), []byte(tt.sep), tt.n)

		// Appending to the results should not change future results.
		var x []byte
		for _, v := range a {