382 lines
14 KiB
Go
382 lines
14 KiB
Go
package bits
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
|
|
"github.com/lyoshenka/bencode"
|
|
)
|
|
|
|
func TestBitmap(t *testing.T) {
|
|
a := Bitmap{
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
|
|
24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
|
|
36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
|
|
}
|
|
b := Bitmap{
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
|
|
24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
|
|
36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 47, 46,
|
|
}
|
|
c := Bitmap{
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1,
|
|
}
|
|
|
|
if !a.Equals(a) {
|
|
t.Error("bitmap does not equal itself")
|
|
}
|
|
if a.Equals(b) {
|
|
t.Error("bitmap equals another bitmap with different id")
|
|
}
|
|
|
|
if !a.Xor(b).Equals(c) {
|
|
t.Error(a.Xor(b))
|
|
}
|
|
|
|
if c.PrefixLen() != 375 {
|
|
t.Error(c.PrefixLen())
|
|
}
|
|
|
|
if b.Less(a) {
|
|
t.Error("bitmap fails lessThan test")
|
|
}
|
|
|
|
id := "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
|
|
if FromHexP(id).Hex() != id {
|
|
t.Error(FromHexP(id).Hex())
|
|
}
|
|
}
|
|
|
|
func TestBitmap_GetBit(t *testing.T) {
|
|
tt := []struct {
|
|
bit int
|
|
expected bool
|
|
panic bool
|
|
}{
|
|
{bit: 383, expected: false, panic: false},
|
|
{bit: 382, expected: true, panic: false},
|
|
{bit: 381, expected: false, panic: false},
|
|
{bit: 380, expected: true, panic: false},
|
|
}
|
|
|
|
b := FromShortHexP("a")
|
|
|
|
for _, test := range tt {
|
|
actual := getBit(b[:], test.bit)
|
|
if test.expected != actual {
|
|
t.Errorf("getting bit %d of %s: expected %t, got %t", test.bit, b.HexSimplified(), test.expected, actual)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_SetBit(t *testing.T) {
|
|
tt := []struct {
|
|
hex string
|
|
bit int
|
|
one bool
|
|
expected string
|
|
panic bool
|
|
}{
|
|
{hex: "0", bit: 383, one: true, expected: "1", panic: false},
|
|
{hex: "0", bit: 382, one: true, expected: "2", panic: false},
|
|
{hex: "0", bit: 381, one: true, expected: "4", panic: false},
|
|
{hex: "0", bit: 385, one: true, expected: "1", panic: true},
|
|
{hex: "0", bit: 384, one: true, expected: "1", panic: true},
|
|
}
|
|
|
|
for _, test := range tt {
|
|
expected := FromShortHexP(test.expected)
|
|
actual := FromShortHexP(test.hex)
|
|
if test.panic {
|
|
assertPanic(t, fmt.Sprintf("setting bit %d to %t", test.bit, test.one), func() { setBit(actual[:], test.bit, test.one) })
|
|
} else {
|
|
setBit(actual[:], test.bit, test.one)
|
|
if !expected.Equals(actual) {
|
|
t.Errorf("setting bit %d to %t: expected %s, got %s", test.bit, test.one, test.expected, actual.HexSimplified())
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_FromHexShort(t *testing.T) {
|
|
tt := []struct {
|
|
short string
|
|
long string
|
|
}{
|
|
{short: "", long: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{short: "0", long: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{short: "00000", long: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{short: "9473745bc", long: "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000009473745bc"},
|
|
{short: "09473745bc", long: "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000009473745bc"},
|
|
{short: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef",
|
|
long: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"},
|
|
}
|
|
|
|
for _, test := range tt {
|
|
short := FromShortHexP(test.short)
|
|
long := FromHexP(test.long)
|
|
if !short.Equals(long) {
|
|
t.Errorf("short hex %s: expected %s, got %s", test.short, long.Hex(), short.Hex())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmapMarshal(t *testing.T) {
|
|
b := FromStringP("123456789012345678901234567890123456789012345678")
|
|
encoded, err := bencode.EncodeBytes(b)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if string(encoded) != "48:123456789012345678901234567890123456789012345678" {
|
|
t.Error("encoding does not match expected")
|
|
}
|
|
}
|
|
|
|
func TestBitmapMarshalEmbedded(t *testing.T) {
|
|
e := struct {
|
|
A string
|
|
B Bitmap
|
|
C int
|
|
}{
|
|
A: "1",
|
|
B: FromStringP("222222222222222222222222222222222222222222222222"),
|
|
C: 3,
|
|
}
|
|
|
|
encoded, err := bencode.EncodeBytes(e)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if string(encoded) != "d1:A1:11:B48:2222222222222222222222222222222222222222222222221:Ci3ee" {
|
|
t.Error("encoding does not match expected")
|
|
}
|
|
}
|
|
|
|
func TestBitmapMarshalEmbedded2(t *testing.T) {
|
|
encoded, err := bencode.EncodeBytes([]interface{}{
|
|
FromStringP("333333333333333333333333333333333333333333333333"),
|
|
})
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if string(encoded) != "l48:333333333333333333333333333333333333333333333333e" {
|
|
t.Error("encoding does not match expected")
|
|
}
|
|
}
|
|
|
|
func TestBitmap_PrefixLen(t *testing.T) {
|
|
tt := []struct {
|
|
hex string
|
|
len int
|
|
}{
|
|
{len: 0, hex: "F00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{len: 0, hex: "800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{len: 1, hex: "700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{len: 1, hex: "400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{len: 384, hex: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{len: 383, hex: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"},
|
|
{len: 382, hex: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"},
|
|
{len: 382, hex: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"},
|
|
}
|
|
|
|
for _, test := range tt {
|
|
len := FromHexP(test.hex).PrefixLen()
|
|
if len != test.len {
|
|
t.Errorf("got prefix len %d; expected %d for %s", len, test.len, test.hex)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_Prefix(t *testing.T) {
|
|
allOne := FromHexP("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")
|
|
|
|
zerosTT := []struct {
|
|
zeros int
|
|
expected string
|
|
}{
|
|
{zeros: -123, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 0, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 1, expected: "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 69, expected: "000000000000000007ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 383, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"},
|
|
{zeros: 384, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{zeros: 400, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
}
|
|
|
|
for _, test := range zerosTT {
|
|
expected := FromHexP(test.expected)
|
|
actual := allOne.Prefix(test.zeros, false)
|
|
if !actual.Equals(expected) {
|
|
t.Errorf("%d zeros: got %s; expected %s", test.zeros, actual.Hex(), expected.Hex())
|
|
}
|
|
}
|
|
|
|
for i := 0; i < NumBits; i++ {
|
|
b := allOne.Prefix(i, false)
|
|
if b.PrefixLen() != i {
|
|
t.Errorf("got prefix len %d; expected %d for %s", b.PrefixLen(), i, b.Hex())
|
|
}
|
|
}
|
|
|
|
allZero := FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
|
|
|
|
onesTT := []struct {
|
|
ones int
|
|
expected string
|
|
}{
|
|
{ones: -123, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 0, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 1, expected: "800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 69, expected: "fffffffffffffffff8000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 383, expected: "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe"},
|
|
{ones: 384, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{ones: 400, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
}
|
|
|
|
for _, test := range onesTT {
|
|
expected := FromHexP(test.expected)
|
|
actual := allZero.Prefix(test.ones, true)
|
|
if !actual.Equals(expected) {
|
|
t.Errorf("%d ones: got %s; expected %s", test.ones, actual.Hex(), expected.Hex())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_Suffix(t *testing.T) {
|
|
allOne := FromHexP("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")
|
|
|
|
zerosTT := []struct {
|
|
zeros int
|
|
expected string
|
|
}{
|
|
{zeros: -123, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 0, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{zeros: 1, expected: "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe"},
|
|
{zeros: 69, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe00000000000000000"},
|
|
{zeros: 383, expected: "800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{zeros: 384, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{zeros: 400, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
}
|
|
|
|
for _, test := range zerosTT {
|
|
expected := FromHexP(test.expected)
|
|
actual := allOne.Suffix(test.zeros, false)
|
|
if !actual.Equals(expected) {
|
|
t.Errorf("%d zeros: got %s; expected %s", test.zeros, actual.Hex(), expected.Hex())
|
|
}
|
|
}
|
|
|
|
for i := 0; i < NumBits; i++ {
|
|
b := allOne.Prefix(i, false)
|
|
if b.PrefixLen() != i {
|
|
t.Errorf("got prefix len %d; expected %d for %s", b.PrefixLen(), i, b.Hex())
|
|
}
|
|
}
|
|
|
|
allZero := FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
|
|
|
|
onesTT := []struct {
|
|
ones int
|
|
expected string
|
|
}{
|
|
{ones: -123, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 0, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"},
|
|
{ones: 1, expected: "000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"},
|
|
{ones: 69, expected: "0000000000000000000000000000000000000000000000000000000000000000000000000000001fffffffffffffffff"},
|
|
{ones: 383, expected: "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{ones: 384, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
{ones: 400, expected: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"},
|
|
}
|
|
|
|
for _, test := range onesTT {
|
|
expected := FromHexP(test.expected)
|
|
actual := allZero.Suffix(test.ones, true)
|
|
if !actual.Equals(expected) {
|
|
t.Errorf("%d ones: got %s; expected %s", test.ones, actual.Hex(), expected.Hex())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_Add(t *testing.T) {
|
|
tt := []struct {
|
|
a, b, sum string
|
|
panic bool
|
|
}{
|
|
{"0", "0", "0", false},
|
|
{"0", "1", "1", false},
|
|
{"1", "0", "1", false},
|
|
{"1", "1", "2", false},
|
|
{"8", "4", "c", false},
|
|
{"1000", "0010", "1010", false},
|
|
{"1111", "1111", "2222", false},
|
|
{"ffff", "1", "10000", false},
|
|
{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0", "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", false},
|
|
{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "1", "", true},
|
|
}
|
|
|
|
for _, test := range tt {
|
|
a := FromShortHexP(test.a)
|
|
b := FromShortHexP(test.b)
|
|
expected := FromShortHexP(test.sum)
|
|
if test.panic {
|
|
assertPanic(t, fmt.Sprintf("adding %s and %s", test.a, test.b), func() { a.Add(b) })
|
|
} else {
|
|
actual := a.Add(b)
|
|
if !expected.Equals(actual) {
|
|
t.Errorf("adding %s and %s; expected %s, got %s", test.a, test.b, test.sum, actual.HexSimplified())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBitmap_Sub(t *testing.T) {
|
|
tt := []struct {
|
|
a, b, sum string
|
|
panic bool
|
|
}{
|
|
{"0", "0", "0", false},
|
|
{"1", "0", "1", false},
|
|
{"1", "1", "0", false},
|
|
{"8", "4", "4", false},
|
|
{"f", "9", "6", false},
|
|
{"f", "e", "1", false},
|
|
{"10", "f", "1", false},
|
|
{"2222", "1111", "1111", false},
|
|
{"ffff", "1", "fffe", false},
|
|
{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0", "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", false},
|
|
{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0", false},
|
|
{"0", "1", "", true},
|
|
}
|
|
|
|
for _, test := range tt {
|
|
a := FromShortHexP(test.a)
|
|
b := FromShortHexP(test.b)
|
|
expected := FromShortHexP(test.sum)
|
|
if test.panic {
|
|
assertPanic(t, fmt.Sprintf("subtracting %s - %s", test.a, test.b), func() { a.Sub(b) })
|
|
} else {
|
|
actual := a.Sub(b)
|
|
if !expected.Equals(actual) {
|
|
t.Errorf("subtracting %s - %s; expected %s, got %s", test.a, test.b, test.sum, actual.HexSimplified())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func assertPanic(t *testing.T, text string, f func()) {
|
|
defer func() {
|
|
if r := recover(); r == nil {
|
|
t.Errorf("%s: did not panic as expected", text)
|
|
}
|
|
}()
|
|
f()
|
|
}
|