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Copy pathforce_stop_test.go
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420 lines (403 loc) · 11.5 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
package copilot_test
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net"
"runtime"
"strconv"
"strings"
"sync"
"testing"
"time"
copilot "github.com/github/copilot-sdk/go"
)
type responseRetirementPeer struct {
listener net.Listener
mu sync.Mutex
conn net.Conn
writeMu sync.Mutex
sent chan struct{}
done chan error
}
func newResponseRetirementPeer(t *testing.T, expectedSends int) *responseRetirementPeer {
t.Helper()
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatal(err)
}
peer := &responseRetirementPeer{
listener: listener,
sent: make(chan struct{}),
done: make(chan error, 1),
}
t.Cleanup(func() {
if err := listener.Close(); err != nil && !errors.Is(err, net.ErrClosed) {
t.Error("close peer listener:", err)
}
peer.mu.Lock()
conn := peer.conn
peer.mu.Unlock()
if conn != nil {
if err := conn.Close(); err != nil && !errors.Is(err, net.ErrClosed) {
t.Error("close peer connection:", err)
}
}
select {
case err := <-peer.done:
if err != nil {
t.Error("TCP peer:", err)
}
case <-time.After(5 * time.Second):
t.Error("TCP peer did not exit")
}
})
go func() { peer.done <- peer.serve(expectedSends) }()
return peer
}
func (p *responseRetirementPeer) serve(expectedSends int) error {
conn, err := p.listener.Accept()
if err != nil {
if errors.Is(err, net.ErrClosed) {
return nil
}
return err
}
p.mu.Lock()
p.conn = conn
p.mu.Unlock()
defer conn.Close()
reader := bufio.NewReader(conn)
sends := 0
for {
frame, err := readRetirementFrame(reader)
if err != nil {
if errors.Is(err, io.EOF) || errors.Is(err, net.ErrClosed) {
return nil
}
return err
}
var request struct {
ID json.RawMessage `json:"id"`
Method string `json:"method"`
}
if err := json.Unmarshal(frame, &request); err != nil {
return err
}
var result any
switch request.Method {
case "connect":
result = map[string]any{"ok": true, "protocolVersion": copilot.SDKProtocolVersion, "version": "force-stop-test"}
case "session.create":
result = map[string]any{"sessionId": "retirement-session"}
case "session.sendAndWait":
if err := p.write(map[string]any{
"jsonrpc": "2.0", "id": request.ID,
"error": map[string]any{"code": -32601, "message": "Method not found"},
}); err != nil {
return err
}
continue
case "session.send":
sends++
result = map[string]any{"messageId": fmt.Sprintf("message-%d", sends)}
case "ping":
result = map[string]any{"message": "pong", "timestamp": "2026-01-01T00:00:00Z", "protocolVersion": copilot.SDKProtocolVersion}
default:
return fmt.Errorf("unexpected RPC: %s", request.Method)
}
if err := p.write(map[string]any{"jsonrpc": "2.0", "id": request.ID, "result": result}); err != nil {
return err
}
if request.Method == "session.send" && sends == expectedSends {
close(p.sent)
}
}
}
func readRetirementFrame(reader *bufio.Reader) ([]byte, error) {
length := -1
for {
line, err := reader.ReadString('\n')
if err != nil {
if errors.Is(err, io.EOF) && line == "" && length == -1 {
return nil, io.EOF
}
return nil, fmt.Errorf("read frame header: %w", err)
}
if line == "\r\n" {
break
}
name, value, ok := strings.Cut(line, ":")
if !ok {
return nil, fmt.Errorf("invalid frame header: %q", line)
}
if strings.EqualFold(name, "Content-Length") {
if length != -1 {
return nil, errors.New("duplicate Content-Length")
}
length, err = strconv.Atoi(strings.TrimSpace(value))
if err != nil {
return nil, err
}
}
}
if length <= 0 || length > 128*1024 {
return nil, fmt.Errorf("invalid frame length: %d", length)
}
body := make([]byte, length)
if _, err := io.ReadFull(reader, body); err != nil {
return nil, err
}
return body, nil
}
func (p *responseRetirementPeer) write(message any) error {
body, err := json.Marshal(message)
if err != nil {
return err
}
p.writeMu.Lock()
defer p.writeMu.Unlock()
p.mu.Lock()
conn := p.conn
p.mu.Unlock()
_, err = fmt.Fprintf(conn, "Content-Length: %d\r\n\r\n%s", len(body), body)
return err
}
type responseRetirementCapture struct {
data [64]byte
}
func capturedRetirementHandler() (copilot.SessionEventHandler, <-chan struct{}) {
capture := &responseRetirementCapture{data: [64]byte{1}}
collected := make(chan struct{})
runtime.AddCleanup(capture, func(done chan struct{}) { close(done) }, collected)
return func(copilot.SessionEvent) { runtime.KeepAlive(capture) }, collected
}
func awaitRetirementCapture(t *testing.T, collected <-chan struct{}) {
t.Helper()
deadline := time.Now().Add(5 * time.Second)
for {
runtime.GC()
select {
case <-collected:
return
default:
}
if time.Now().After(deadline) {
t.Fatal("force-stopped retained session still roots an unadmitted callback capture")
}
runtime.Gosched()
}
}
func TestForceStopReleasesRetainedEventCallbacks(t *testing.T) {
for _, blockedHandler := range []bool{false, true} {
t.Run(fmt.Sprintf("blocked handler=%t", blockedHandler), func(t *testing.T) {
t.Parallel()
peer := newResponseRetirementPeer(t, 0)
client := copilot.NewClient(&copilot.ClientOptions{
Connection: copilot.URIConnection{URL: peer.listener.Addr().String()},
})
t.Cleanup(client.ForceStop)
ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)
defer cancel()
if err := client.Start(ctx); err != nil {
t.Fatal("start:", err)
}
session, err := client.CreateSession(ctx, &copilot.SessionConfig{
SessionID: "retirement-session", OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
})
if err != nil {
t.Fatal("create:", err)
}
entered := make(chan struct{})
release := make(chan struct{})
exited := make(chan struct{})
admitted := false
releaseHandler := sync.OnceFunc(func() { close(release) })
t.Cleanup(func() {
client.ForceStop()
releaseHandler()
if admitted {
select {
case <-exited:
case <-time.After(5 * time.Second):
t.Error("admitted event handler did not finish")
}
}
})
if blockedHandler {
session.On(func(copilot.SessionEvent) {
close(entered)
<-release
close(exited)
})
}
handler, collected := capturedRetirementHandler()
unsubscribe := session.On(handler)
if blockedHandler {
if err := peer.write(map[string]any{
"jsonrpc": "2.0", "method": "session.event",
"params": map[string]any{
"sessionId": session.SessionID,
"event": map[string]any{
"id": "00000000-0000-4000-8000-000000000002", "parentId": nil,
"timestamp": "2026-01-01T00:00:00Z", "type": "session.idle",
"ephemeral": true, "data": map[string]any{},
},
},
}); err != nil {
t.Fatal("notify:", err)
}
select {
case <-entered:
admitted = true
case <-ctx.Done():
t.Fatal("event handler did not enter:", ctx.Err())
}
}
client.ForceStop()
awaitRetirementCapture(t, collected)
runtime.KeepAlive(session)
runtime.KeepAlive(unsubscribe)
})
}
}
func createRetirementHookSession(t *testing.T, ctx context.Context, client *copilot.Client) (*copilot.Session, <-chan struct{}) {
t.Helper()
capture := &responseRetirementCapture{data: [64]byte{2}}
collected := make(chan struct{})
runtime.AddCleanup(capture, func(done chan struct{}) { close(done) }, collected)
session, err := client.CreateSession(ctx, &copilot.SessionConfig{
SessionID: "retirement-session", OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
Hooks: &copilot.SessionHooks{
OnSessionEnd: func(copilot.SessionEndHookInput, copilot.HookInvocation) (*copilot.SessionEndHookOutput, error) {
runtime.KeepAlive(capture)
return nil, nil
},
},
})
if err != nil {
t.Fatal("create:", err)
}
return session, collected
}
func TestForceStopReleasesRetainedHookCallbacks(t *testing.T) {
peer := newResponseRetirementPeer(t, 0)
client := copilot.NewClient(&copilot.ClientOptions{
Connection: copilot.URIConnection{URL: peer.listener.Addr().String()},
})
t.Cleanup(client.ForceStop)
ctx, cancel := context.WithTimeout(t.Context(), 10*time.Second)
defer cancel()
if err := client.Start(ctx); err != nil {
t.Fatal("start:", err)
}
session, collected := createRetirementHookSession(t, ctx, client)
client.ForceStop()
awaitRetirementCapture(t, collected)
runtime.KeepAlive(session)
}
func TestForceStopRejectsAcknowledgedPlainResponseWaits(t *testing.T) {
for _, count := range []int{1, 2} {
for _, blockedHandler := range []bool{false, true} {
t.Run(fmt.Sprintf("%d waits/blocked handler=%t", count, blockedHandler), func(t *testing.T) {
t.Parallel()
peer := newResponseRetirementPeer(t, count)
client := copilot.NewClient(&copilot.ClientOptions{
Connection: copilot.URIConnection{URL: peer.listener.Addr().String()},
})
t.Cleanup(client.ForceStop)
operationCtx, cancelOperation := context.WithTimeout(t.Context(), 10*time.Second)
defer cancelOperation()
if err := client.Start(operationCtx); err != nil {
t.Fatal("start:", err)
}
session, err := client.CreateSession(operationCtx, &copilot.SessionConfig{
SessionID: "retirement-session", OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
})
if err != nil {
t.Fatal("create session:", err)
}
entered := make(chan struct{})
release := make(chan struct{})
releaseHandler := sync.OnceFunc(func() { close(release) })
t.Cleanup(releaseHandler)
if blockedHandler {
session.On(func(copilot.SessionEvent) {
close(entered)
<-release
})
}
waitCtx, cancelWait := context.WithCancel(t.Context())
results := make(chan error, count)
var waits sync.WaitGroup
t.Cleanup(func() {
cancelWait()
releaseHandler()
waits.Wait()
})
for range count {
waits.Add(1)
go func() {
defer waits.Done()
_, err := session.SendAndWait(waitCtx, copilot.MessageOptions{Prompt: "hold the response"})
results <- err
}()
}
select {
case <-peer.sent:
case <-operationCtx.Done():
t.Fatal("send acknowledgments:", operationCtx.Err())
}
// This later reply proves every preceding send acknowledgment reached the transport.
if _, err := client.Ping(operationCtx, "barrier"); err != nil {
t.Fatal("ping:", err)
}
if blockedHandler {
err := peer.write(map[string]any{
"jsonrpc": "2.0", "method": "session.event",
"params": map[string]any{
"sessionId": session.SessionID,
"event": map[string]any{
"id": "00000000-0000-4000-8000-000000000001", "parentId": nil,
"timestamp": "2026-01-01T00:00:00Z", "type": "session.idle",
"ephemeral": true, "data": map[string]any{},
},
},
})
if err != nil {
t.Fatal("notify:", err)
}
select {
case <-entered:
case <-operationCtx.Done():
t.Fatal("event handler did not enter:", operationCtx.Err())
}
}
stopped := make(chan struct{})
go func() {
client.ForceStop()
close(stopped)
}()
select {
case <-stopped:
case <-operationCtx.Done():
t.Fatal("force stop joined the admitted handler:", operationCtx.Err())
}
for range count {
select {
case err := <-results:
if err == nil || !strings.Contains(err.Error(), "session closed before response completed") {
t.Fatalf("expected response retirement error, got %v", err)
}
case <-time.After(5 * time.Second):
t.Fatal("acknowledged response wait remained blocked after force stop")
}
}
})
}
}
}
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