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https://github.com/openlibrecommunity/olcrtc.git
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76026c5452
handshake and control duplicated the same 4-byte BE length + body framing with independent ErrFrameTooLarge constants. Centralize in internal/framing and have both callers delegate. ErrFrameTooLarge is re-exported so existing errors.Is checks keep working. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
78 lines
1.8 KiB
Go
78 lines
1.8 KiB
Go
package framing_test
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import (
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"bytes"
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"errors"
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"io"
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"strings"
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"testing"
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"github.com/openlibrecommunity/olcrtc/internal/framing"
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)
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func TestRoundTripJSON(t *testing.T) {
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var buf bytes.Buffer
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type msg struct {
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Type string `json:"type"`
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N int `json:"n"`
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}
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in := msg{Type: "ping", N: 7}
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if err := framing.WriteJSON(&buf, in, 1024); err != nil {
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t.Fatalf("write: %v", err)
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}
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body, err := framing.ReadBytes(&buf, 1024)
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if err != nil {
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t.Fatalf("read: %v", err)
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}
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want := `{"type":"ping","n":7}`
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if string(body) != want {
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t.Fatalf("body=%q want=%q", body, want)
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}
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}
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func TestWriteTooLarge(t *testing.T) {
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var buf bytes.Buffer
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err := framing.WriteBytes(&buf, []byte(strings.Repeat("x", 10)), 5)
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if !errors.Is(err, framing.ErrFrameTooLarge) {
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t.Fatalf("want ErrFrameTooLarge, got %v", err)
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}
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}
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func TestReadTooLarge(t *testing.T) {
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var buf bytes.Buffer
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// Manually craft an oversized header.
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buf.Write([]byte{0x00, 0x00, 0x10, 0x00}) // 4096
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_, err := framing.ReadBytes(&buf, 1024)
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if !errors.Is(err, framing.ErrFrameTooLarge) {
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t.Fatalf("want ErrFrameTooLarge, got %v", err)
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}
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}
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func TestReadTruncated(t *testing.T) {
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var buf bytes.Buffer
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buf.Write([]byte{0x00, 0x00, 0x00, 0x04})
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buf.WriteByte(0x41) // only 1 of 4 body bytes
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_, err := framing.ReadBytes(&buf, 1024)
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if err == nil || errors.Is(err, framing.ErrFrameTooLarge) {
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t.Fatalf("want EOF/unexpected, got %v", err)
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}
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if !errors.Is(err, io.ErrUnexpectedEOF) {
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t.Fatalf("want UnexpectedEOF, got %v", err)
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}
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}
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func TestZeroMaxAllowsAnything(t *testing.T) {
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var buf bytes.Buffer
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big := bytes.Repeat([]byte{0xAA}, 100_000)
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if err := framing.WriteBytes(&buf, big, 0); err != nil {
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t.Fatalf("write: %v", err)
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}
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got, err := framing.ReadBytes(&buf, 0)
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if err != nil {
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t.Fatalf("read: %v", err)
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}
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if !bytes.Equal(got, big) {
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t.Fatalf("roundtrip mismatch")
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}
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}
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