package buf_test import ( "bytes" "crypto/rand" "io" "os" "testing" "github.com/google/go-cmp/cmp" "github.com/v2fly/v2ray-core/v5/common" . "github.com/v2fly/v2ray-core/v5/common/buf" ) func TestMultiBufferRead(t *testing.T) { b1 := New() common.Must2(b1.WriteString("ab")) b2 := New() common.Must2(b2.WriteString("cd")) mb := MultiBuffer{b1, b2} bs := make([]byte, 32) _, nBytes := SplitBytes(mb, bs) if nBytes != 4 { t.Error("expect 4 bytes split, but got ", nBytes) } if r := cmp.Diff(bs[:nBytes], []byte("abcd")); r != "" { t.Error(r) } } func TestMultiBufferAppend(t *testing.T) { var mb MultiBuffer b := New() common.Must2(b.WriteString("ab")) mb = append(mb, b) if mb.Len() != 2 { t.Error("expected length 2, but got ", mb.Len()) } } func TestMultiBufferSliceBySizeLarge(t *testing.T) { lb := make([]byte, 8*1024) common.Must2(io.ReadFull(rand.Reader, lb)) mb := MergeBytes(nil, lb) mb, mb2 := SplitSize(mb, 1024) if mb2.Len() != 1024 { t.Error("expect length 1024, but got ", mb2.Len()) } if mb.Len() != 7*1024 { t.Error("expect length 7*1024, but got ", mb.Len()) } mb, mb3 := SplitSize(mb, 7*1024) if mb3.Len() != 7*1024 { t.Error("expect length 7*1024, but got", mb.Len()) } if !mb.IsEmpty() { t.Error("expect empty buffer, but got ", mb.Len()) } } func TestMultiBufferSplitFirst(t *testing.T) { b1 := New() b1.WriteString("b1") b2 := New() b2.WriteString("b2") b3 := New() b3.WriteString("b3") var mb MultiBuffer mb = append(mb, b1, b2, b3) mb, c1 := SplitFirst(mb) if diff := cmp.Diff(b1.String(), c1.String()); diff != "" { t.Error(diff) } mb, c2 := SplitFirst(mb) if diff := cmp.Diff(b2.String(), c2.String()); diff != "" { t.Error(diff) } mb, c3 := SplitFirst(mb) if diff := cmp.Diff(b3.String(), c3.String()); diff != "" { t.Error(diff) } if !mb.IsEmpty() { t.Error("expect empty buffer, but got ", mb.String()) } } func TestMultiBufferReadAllToByte(t *testing.T) { { lb := make([]byte, 8*1024) common.Must2(io.ReadFull(rand.Reader, lb)) rd := bytes.NewBuffer(lb) b, err := ReadAllToBytes(rd) common.Must(err) if l := len(b); l != 8*1024 { t.Error("unexpected length from ReadAllToBytes", l) } } { const dat = "data/test_MultiBufferReadAllToByte.dat" f, err := os.Open(dat) common.Must(err) buf2, err := ReadAllToBytes(f) common.Must(err) f.Close() cnt, err := os.ReadFile(dat) common.Must(err) if d := cmp.Diff(buf2, cnt); d != "" { t.Error("fail to read from file: ", d) } } } func TestMultiBufferCopy(t *testing.T) { lb := make([]byte, 8*1024) common.Must2(io.ReadFull(rand.Reader, lb)) reader := bytes.NewBuffer(lb) mb, err := ReadFrom(reader) common.Must(err) lbdst := make([]byte, 8*1024) mb.Copy(lbdst) if d := cmp.Diff(lb, lbdst); d != "" { t.Error("unexpected different from MultiBufferCopy ", d) } } func TestSplitFirstBytes(t *testing.T) { a := New() common.Must2(a.WriteString("ab")) b := New() common.Must2(b.WriteString("bc")) mb := MultiBuffer{a, b} o := make([]byte, 2) _, cnt := SplitFirstBytes(mb, o) if cnt != 2 { t.Error("unexpected cnt from SplitFirstBytes ", cnt) } if d := cmp.Diff(string(o), "ab"); d != "" { t.Error("unexpected splited result from SplitFirstBytes ", d) } } func TestCompact(t *testing.T) { a := New() common.Must2(a.WriteString("ab")) b := New() common.Must2(b.WriteString("bc")) mb := MultiBuffer{a, b} cmb := Compact(mb) if w := cmb.String(); w != "abbc" { t.Error("unexpected Compact result ", w) } } func BenchmarkSplitBytes(b *testing.B) { var mb MultiBuffer raw := make([]byte, Size) b.ResetTimer() for i := 0; i < b.N; i++ { buffer := StackNew() buffer.Extend(Size) mb = append(mb, &buffer) mb, _ = SplitBytes(mb, raw) } }