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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.21
package quic
import (
"bytes"
"testing"
)
func TestConsumeVarint(t *testing.T) {
for _, test := range []struct {
b []byte
want uint64
wantLen int
}{
{[]byte{0x00}, 0, 1},
{[]byte{0x3f}, 63, 1},
{[]byte{0x40, 0x00}, 0, 2},
{[]byte{0x7f, 0xff}, 16383, 2},
{[]byte{0x80, 0x00, 0x00, 0x00}, 0, 4},
{[]byte{0xbf, 0xff, 0xff, 0xff}, 1073741823, 4},
{[]byte{0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 0, 8},
{[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, 4611686018427387903, 8},
// Example cases from https://www.rfc-editor.org/rfc/rfc9000.html#section-a.1
{[]byte{0xc2, 0x19, 0x7c, 0x5e, 0xff, 0x14, 0xe8, 0x8c}, 151288809941952652, 8},
{[]byte{0x9d, 0x7f, 0x3e, 0x7d}, 494878333, 4},
{[]byte{0x7b, 0xbd}, 15293, 2},
{[]byte{0x25}, 37, 1},
{[]byte{0x40, 0x25}, 37, 2},
} {
got, gotLen := consumeVarint(test.b)
if got != test.want || gotLen != test.wantLen {
t.Errorf("consumeVarint(%x) = %v, %v; want %v, %v", test.b, got, gotLen, test.want, test.wantLen)
}
// Extra data in the buffer is ignored.
b := append(test.b, 0)
got, gotLen = consumeVarint(b)
if got != test.want || gotLen != test.wantLen {
t.Errorf("consumeVarint(%x) = %v, %v; want %v, %v", b, got, gotLen, test.want, test.wantLen)
}
// Short buffer results in an error.
for i := 1; i <= len(test.b); i++ {
b = test.b[:len(test.b)-i]
got, gotLen = consumeVarint(b)
if got != 0 || gotLen >= 0 {
t.Errorf("consumeVarint(%x) = %v, %v; want 0, -1", b, got, gotLen)
}
}
}
}
func TestAppendVarint(t *testing.T) {
for _, test := range []struct {
v uint64
want []byte
}{
{0, []byte{0x00}},
{63, []byte{0x3f}},
{16383, []byte{0x7f, 0xff}},
{1073741823, []byte{0xbf, 0xff, 0xff, 0xff}},
{4611686018427387903, []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}},
// Example cases from https://www.rfc-editor.org/rfc/rfc9000.html#section-a.1
{151288809941952652, []byte{0xc2, 0x19, 0x7c, 0x5e, 0xff, 0x14, 0xe8, 0x8c}},
{494878333, []byte{0x9d, 0x7f, 0x3e, 0x7d}},
{15293, []byte{0x7b, 0xbd}},
{37, []byte{0x25}},
} {
got := appendVarint([]byte{}, test.v)
if !bytes.Equal(got, test.want) {
t.Errorf("AppendVarint(nil, %v) = %x, want %x", test.v, got, test.want)
}
if gotLen, wantLen := sizeVarint(test.v), len(got); gotLen != wantLen {
t.Errorf("SizeVarint(%v) = %v, want %v", test.v, gotLen, wantLen)
}
}
}
func TestConsumeUint32(t *testing.T) {
for _, test := range []struct {
b []byte
want uint32
wantLen int
}{
{[]byte{0x01, 0x02, 0x03, 0x04}, 0x01020304, 4},
{[]byte{0x01, 0x02, 0x03}, 0, -1},
} {
if got, n := consumeUint32(test.b); got != test.want || n != test.wantLen {
t.Errorf("consumeUint32(%x) = %v, %v; want %v, %v", test.b, got, n, test.want, test.wantLen)
}
}
}
func TestConsumeUint64(t *testing.T) {
for _, test := range []struct {
b []byte
want uint64
wantLen int
}{
{[]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08}, 0x0102030405060708, 8},
{[]byte{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}, 0, -1},
} {
if got, n := consumeUint64(test.b); got != test.want || n != test.wantLen {
t.Errorf("consumeUint32(%x) = %v, %v; want %v, %v", test.b, got, n, test.want, test.wantLen)
}
}
}
func TestConsumeVarintBytes(t *testing.T) {
for _, test := range []struct {
b []byte
want []byte
wantLen int
}{
{[]byte{0x00}, []byte{}, 1},
{[]byte{0x40, 0x00}, []byte{}, 2},
{[]byte{0x04, 0x01, 0x02, 0x03, 0x04}, []byte{0x01, 0x02, 0x03, 0x04}, 5},
{[]byte{0x40, 0x04, 0x01, 0x02, 0x03, 0x04}, []byte{0x01, 0x02, 0x03, 0x04}, 6},
} {
got, gotLen := consumeVarintBytes(test.b)
if !bytes.Equal(got, test.want) || gotLen != test.wantLen {
t.Errorf("consumeVarintBytes(%x) = {%x}, %v; want {%x}, %v", test.b, got, gotLen, test.want, test.wantLen)
}
// Extra data in the buffer is ignored.
b := append(test.b, 0)
got, gotLen = consumeVarintBytes(b)
if !bytes.Equal(got, test.want) || gotLen != test.wantLen {
t.Errorf("consumeVarintBytes(%x) = {%x}, %v; want {%x}, %v", b, got, gotLen, test.want, test.wantLen)
}
// Short buffer results in an error.
for i := 1; i <= len(test.b); i++ {
b = test.b[:len(test.b)-i]
got, gotLen := consumeVarintBytes(b)
if len(got) > 0 || gotLen > 0 {
t.Errorf("consumeVarintBytes(%x) = {%x}, %v; want {}, -1", b, got, gotLen)
}
}
}
}
func TestConsumeVarintBytesErrors(t *testing.T) {
for _, b := range [][]byte{
{0x01},
{0x40, 0x01},
} {
got, gotLen := consumeVarintBytes(b)
if len(got) > 0 || gotLen > 0 {
t.Errorf("consumeVarintBytes(%x) = {%x}, %v; want {}, -1", b, got, gotLen)
}
}
}
func TestConsumeUint8Bytes(t *testing.T) {
for _, test := range []struct {
b []byte
want []byte
wantLen int
}{
{[]byte{0x00}, []byte{}, 1},
{[]byte{0x01, 0x00}, []byte{0x00}, 2},
{[]byte{0x04, 0x01, 0x02, 0x03, 0x04}, []byte{0x01, 0x02, 0x03, 0x04}, 5},
} {
got, gotLen := consumeUint8Bytes(test.b)
if !bytes.Equal(got, test.want) || gotLen != test.wantLen {
t.Errorf("consumeUint8Bytes(%x) = {%x}, %v; want {%x}, %v", test.b, got, gotLen, test.want, test.wantLen)
}
// Extra data in the buffer is ignored.
b := append(test.b, 0)
got, gotLen = consumeUint8Bytes(b)
if !bytes.Equal(got, test.want) || gotLen != test.wantLen {
t.Errorf("consumeUint8Bytes(%x) = {%x}, %v; want {%x}, %v", b, got, gotLen, test.want, test.wantLen)
}
// Short buffer results in an error.
for i := 1; i <= len(test.b); i++ {
b = test.b[:len(test.b)-i]
got, gotLen := consumeUint8Bytes(b)
if len(got) > 0 || gotLen > 0 {
t.Errorf("consumeUint8Bytes(%x) = {%x}, %v; want {}, -1", b, got, gotLen)
}
}
}
}
func TestConsumeUint8BytesErrors(t *testing.T) {
for _, b := range [][]byte{
{0x01},
{0x04, 0x01, 0x02, 0x03},
} {
got, gotLen := consumeUint8Bytes(b)
if len(got) > 0 || gotLen > 0 {
t.Errorf("consumeUint8Bytes(%x) = {%x}, %v; want {}, -1", b, got, gotLen)
}
}
}
func TestAppendUint8Bytes(t *testing.T) {
var got []byte
got = appendUint8Bytes(got, []byte{})
got = appendUint8Bytes(got, []byte{0xaa, 0xbb})
want := []byte{
0x00,
0x02, 0xaa, 0xbb,
}
if !bytes.Equal(got, want) {
t.Errorf("appendUint8Bytes {}, {aabb} = {%x}; want {%x}", got, want)
}
}
func TestAppendVarintBytes(t *testing.T) {
var got []byte
got = appendVarintBytes(got, []byte{})
got = appendVarintBytes(got, []byte{0xaa, 0xbb})
want := []byte{
0x00,
0x02, 0xaa, 0xbb,
}
if !bytes.Equal(got, want) {
t.Errorf("appendVarintBytes {}, {aabb} = {%x}; want {%x}", got, want)
}
}
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