skip     int
	n        int
	expected string
	err      error
}{
	{"", 0, 0, "", nil},
	{"aaa", 0, 3, "aaa", nil},
	{"foobar", 0, 2, "fo", nil},
	{"a", 0, 2, "a", io.EOF},
	{"helloworld", 4, 3, "owo", nil},
	{"helloworld", 5, 5, "world", nil},
	{"helloworld", 5, 6, "world", io.EOF},
	{"helloworld", 10, 1, "", io.EOF},
}

func TestPeek(t *testing.T) {
	for _, test := range peekTests {