git.giacomolli.uk - onechat/blob - subagent_run_test.go

   1 package main
   2
   3 import (
   4         "context"
   5         "io"
   6         "net/http"
   7         "os"
   8         "path/filepath"
   9         "strconv"
  10         "strings"
  11         "sync/atomic"
  12         "testing"
  13         "time"
  14
  15         "github.com/stretchr/testify/require"
  16 )
  17
  18 // subagentTestFullContext is the error body of a call whose input does not fit
  19 // in the context of the model.
  20 const subagentTestFullContext = `{"error": {"message": "Your input exceeds the context window of this model.", "type": "invalid_request_error", "code": "context_length_exceeded"}}`
  21
  22 func TestSpawnRunsASubagentInTheBackground(t *testing.T) {
  23         server := newModelFake(t)
  24         var test *TurnTestLoop
  25         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
  26                 last := subagentTestLastItem(call)
  27                 switch {
  28                 case subagentTestCall(call) && last["type"] == "function_call_output":
  29                         // The report comes after the reply of the turn of the spawn.
  30                         test.events.WaitFor(t, "reply", 1)
  31                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("There are 3 files.")}, 100, 0, 5))
  32                 case subagentTestCall(call):
  33                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"pwd"}`)}, 100, 0, 5))
  34                 case last["type"] == "function_call_output":
  35                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Started.")}, 100, 0, 5))
  36                 case strings.HasPrefix(subagentTestText(last), "["):
  37                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
  38                 default:
  39                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "spawn", `{"tasks":["Count the files."],"effort":null}`)}, 100, 0, 5))
  40                 }
  41         }
  42
  43         test = newTestTurnLoop(t, server)
  44         _, err := test.loop.Submit(terminalSource, "Count the files in a subagent.")
  45         require.NoError(t, err)
  46         test.events.WaitFor(t, "idle", 2)
  47
  48         name := test.events.Last("subagent")
  49         require.True(t, subagentNameValid(name), name)
  50         work := filepath.Join(test.loop.runs.subagents.dir, name, "work")
  51         require.DirExists(t, work)
  52
  53         report := "[" + name + "]\nThere are 3 files.\n\nFull chat: zoom(\"" + name + "\")"
  54         require.Equal(t, []string{
  55                 "user: Count the files in a subagent.",
  56                 `tool: spawn {"tasks":["Count the files."],"effort":null}`,
  57                 "echo: Started " + name + ". Each one's report will reach you as a message when it finishes.",
  58                 "reply: Started.",
  59                 "work: " + report,
  60                 "reply: Noted.",
  61         }, test.Log(t))
  62         require.Equal(t, Event{
  63                 Kind:   "work",
  64                 ID:     4,
  65                 Text:   report,
  66                 Source: name,
  67                 Status: subagentFinished,
  68         }, test.events.LastEvent("work"))
  69         require.Equal(t, "subagent "+name+" done\n", test.logs.String())
  70
  71         var first, second *ModelFakeCall
  72         for n := range server.Calls() {
  73                 call := server.Call(n)
  74                 if !subagentTestCall(call) {
  75                         continue
  76                 }
  77
  78                 if first == nil {
  79                         first = &call
  80                 } else {
  81                         second = &call
  82                 }
  83         }
  84
  85         require.NotNil(t, second)
  86
  87         // The first request of the subagent holds the view, the state, and its
  88         // whole log, with its own prompt and tools.
  89         texts := turnInputTexts(t, *first)
  90         view := strings.Join(texts[:len(texts)-2], "")
  91         require.True(t, strings.HasPrefix(view, "<chat>\n0+1|user: Count the files in a subagent.\n1+1|tool: spawn"), view)
  92         require.Equal(t, "</chat>\n\nNow: Thursday 2026-01-01 12:00 +00:00", texts[len(texts)-2])
  93         require.Equal(t, "0|note: subagent\n\n1|user: Count the files.", texts[len(texts)-1])
  94
  95         instructions, err := test.agent.SubagentPrompt()
  96         require.NoError(t, err)
  97         require.Equal(t, instructions, first.body["instructions"])
  98
  99         var tools []string
 100         for _, tool := range first.body["tools"].([]any) {
 101                 tools = append(tools, tool.(map[string]any)["name"].(string))
 102         }
 103
 104         require.Equal(t, []string{"zoom", "date", "shell", "read", "write", "edit"}, tools)
 105         require.Equal(t, work+"\n", subagentTestLastItem(*second)["output"])
 106
 107         subagent, err := test.loop.runs.subagents.Get(t.Context(), name)
 108         require.NoError(t, err)
 109
 110         log, err := subagent.Show()
 111         require.NoError(t, err)
 112         require.Equal(t, "0|note: subagent\n\n1|user: Count the files.\n\n2|tool: shell {\"command\":\"pwd\"}\n\n3|echo: "+work+"\n\n\n4|reply: There are 3 files.", log)
 113
 114         var agents []string
 115         for _, record := range modelReadUsage(t, test.usagePath) {
 116                 agents = append(agents, record.Agent)
 117         }
 118
 119         require.ElementsMatch(t, []string{"", "", "", name, name}, agents)
 120 }
 121
 122 func TestReportJoinsTheNextRequestOfARunningTurn(t *testing.T) {
 123         server := newModelFake(t)
 124         arrived := make(chan struct{})
 125         release := make(chan struct{})
 126         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 127                 if call.number == 0 {
 128                         close(arrived)
 129                         <-release
 130                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "date", `{"id":0}`)}, 100, 0, 5))
 131
 132                         return
 133                 }
 134
 135                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("done")}, 100, 0, 5))
 136         }
 137
 138         test := newTestTurnLoop(t, server)
 139         _, err := test.loop.Submit(terminalSource, "first")
 140         require.NoError(t, err)
 141
 142         <-arrived
 143         report := subagentReport("GreenOtter", []string{"It is done."})
 144         test.loop.Report("GreenOtter", report, subagentFinished)
 145         close(release)
 146
 147         test.events.WaitFor(t, "idle", 1)
 148         require.Equal(t, report, subagentTestText(subagentTestLastItem(server.Call(1))))
 149
 150         time.Sleep(50 * time.Millisecond)
 151         require.Equal(t, 2, server.Calls())
 152         require.Equal(t, 1, test.events.Count("busy"))
 153 }
 154
 155 func TestReportOfAStoppedSubagentStartsNoTurn(t *testing.T) {
 156         server := newModelFake(t)
 157         test := newTestTurnLoop(t, server)
 158         report := subagentReport("GreenOtter", []string{"failed: context canceled"})
 159         test.loop.Report("GreenOtter", report, subagentStopped)
 160
 161         test.events.WaitFor(t, "work", 1)
 162         time.Sleep(50 * time.Millisecond)
 163         require.Equal(t, []string{"work: " + report}, test.Log(t))
 164         require.Zero(t, server.Calls())
 165         require.Zero(t, test.events.Count("busy"))
 166 }
 167
 168 func TestFullContextGivesAFailedReport(t *testing.T) {
 169         server := newModelFake(t)
 170         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 171                 if subagentTestCall(call) {
 172                         w.WriteHeader(http.StatusBadRequest)
 173                         _, _ = io.WriteString(w, subagentTestFullContext)
 174
 175                         return
 176                 }
 177
 178                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("It failed.")}, 100, 0, 5))
 179         }
 180
 181         test := newTestTurnLoop(t, server)
 182         _, err := test.loop.runs.Spawn(t.Context(), []string{"Read the big file."}, nil)
 183         require.NoError(t, err)
 184         test.events.WaitFor(t, "idle", 1)
 185
 186         name := test.events.Last("subagent")
 187         require.Equal(t, []string{
 188                 "work: [" + name + "]\nfailed: model call: HTTP 400: " + subagentTestFullContext + "\n\nFull chat: zoom(\"" + name + "\")",
 189                 "reply: It failed.",
 190         }, test.Log(t))
 191         require.Equal(t, subagentFailed, test.events.LastEvent("work").Status)
 192         require.Equal(t, "subagent "+name+" failed: model call: HTTP 400: "+subagentTestFullContext+"\n", test.logs.String())
 193 }
 194
 195 func TestSubagentHasItsOwnEffortAndNoSpawn(t *testing.T) {
 196         server := newModelFake(t)
 197         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 198                 if subagentTestCall(call) && subagentTestLastItem(call)["type"] != "function_call_output" {
 199                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "spawn", `{"tasks":["More."],"effort":null}`)}, 100, 0, 5))
 200
 201                         return
 202                 }
 203
 204                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("ok")}, 100, 0, 5))
 205         }
 206
 207         test := newTestTurnLoop(t, server)
 208         runs := test.loop.runs
 209         _, err := runs.Spawn(t.Context(), nil, nil)
 210         require.EqualError(t, err, "no tasks")
 211
 212         effort := "max"
 213         _, err = runs.Spawn(t.Context(), []string{"Think."}, &effort)
 214         require.EqualError(t, err, `no effort "max": one of low, medium, high, xhigh`)
 215
 216         effort = "high"
 217         _, err = runs.Spawn(t.Context(), []string{"Think hard."}, &effort)
 218         require.NoError(t, err)
 219         test.events.WaitFor(t, "idle", 1)
 220
 221         for n := range server.Calls() {
 222                 call := server.Call(n)
 223                 if subagentTestCall(call) {
 224                         require.Equal(t, "high", call.body["reasoning"].(map[string]any)["effort"])
 225                 }
 226         }
 227
 228         subagent, err := runs.subagents.Get(t.Context(), test.events.Last("subagent"))
 229         require.NoError(t, err)
 230
 231         log, err := subagent.Show()
 232         require.NoError(t, err)
 233         require.Equal(t, "0|note: subagent at effort high\n\n1|user: Think hard.\n\n2|tool: spawn {\"tasks\":[\"More.\"],\"effort\":null}\n\n3|echo: error: unknown tool \"spawn\"\n\n4|reply: ok", log)
 234
 235         entries, err := os.ReadDir(runs.subagents.dir)
 236         require.NoError(t, err)
 237         require.Len(t, entries, 1)
 238 }
 239
 240 func TestTellReachesARunningSubagentBetweenItsToolCalls(t *testing.T) {
 241         server := newModelFake(t)
 242         arrived := make(chan struct{})
 243         told := make(chan struct{})
 244         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 245                 switch {
 246                 case !subagentTestCall(call):
 247                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 248                 case call.number == 0:
 249                         close(arrived)
 250                         <-told
 251                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"true"}`)}, 100, 0, 5))
 252                 default:
 253                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Used the second disk.")}, 100, 0, 5))
 254                 }
 255         }
 256
 257         test := newTestTurnLoop(t, server)
 258         runs := test.loop.runs
 259         _, err := runs.Spawn(t.Context(), []string{"Copy the files."}, nil)
 260         require.NoError(t, err)
 261
 262         <-arrived
 263         name := test.events.Last("subagent")
 264         output, err := runs.Tell(t.Context(), name, "Use the second disk.")
 265         require.NoError(t, err)
 266         require.Equal(t, "Sent. "+name+" reads it between its tool calls, and its report answers it.", output)
 267         close(told)
 268
 269         test.events.WaitFor(t, "idle", 1)
 270         require.Equal(t, "Use the second disk.", subagentTestText(subagentTestLastItem(server.Call(1))))
 271         require.Equal(t, "work: "+subagentReport(name, []string{"Used the second disk."}), test.Log(t)[0])
 272 }
 273
 274 func TestTellAfterTheFinalAnswerStartsAnotherChain(t *testing.T) {
 275         server := newModelFake(t)
 276         arrived := make(chan struct{})
 277         told := make(chan struct{})
 278         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 279                 switch {
 280                 case !subagentTestCall(call):
 281                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 282                 case call.number == 0:
 283                         close(arrived)
 284                         <-told
 285                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("First.")}, 100, 0, 5))
 286                 default:
 287                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Second.")}, 100, 0, 5))
 288                 }
 289         }
 290
 291         test := newTestTurnLoop(t, server)
 292         runs := test.loop.runs
 293         _, err := runs.Spawn(t.Context(), []string{"Count."}, nil)
 294         require.NoError(t, err)
 295
 296         <-arrived
 297         name := test.events.Last("subagent")
 298         _, err = runs.Tell(t.Context(), name, "Count again.")
 299         require.NoError(t, err)
 300         close(told)
 301
 302         test.events.WaitFor(t, "idle", 1)
 303         require.Equal(t, "0|note: subagent\n\n1|user: Count.\n\n2|user: Count again.\n\n3|reply: First.", subagentTestText(subagentTestLastItem(server.Call(1))))
 304         require.Equal(t, "work: "+subagentReport(name, []string{"First.", "Second."}), test.Log(t)[0])
 305 }
 306
 307 func TestTellToAFinishedSubagentGoesOnFromItsLog(t *testing.T) {
 308         server := newModelFake(t)
 309         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 310                 text := "Noted."
 311                 if subagentTestCall(call) {
 312                         text = "Reply " + strconv.Itoa(call.number) + "."
 313                 }
 314
 315                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem(text)}, 100, 0, 5))
 316         }
 317
 318         test := newTestTurnLoop(t, server)
 319         runs := test.loop.runs
 320         effort := "high"
 321         _, err := runs.Spawn(t.Context(), []string{"Count."}, &effort)
 322         require.NoError(t, err)
 323         test.events.WaitFor(t, "idle", 1)
 324
 325         name := test.events.Last("subagent")
 326         output, err := runs.Tell(t.Context(), name, "And the hidden files?")
 327         require.NoError(t, err)
 328         require.Equal(t, "Sent. "+name+"'s reply will reach you as a message.", output)
 329         test.events.WaitFor(t, "idle", 2)
 330
 331         call := server.Call(2)
 332         require.True(t, subagentTestCall(call))
 333         require.Equal(t, "high", call.body["reasoning"].(map[string]any)["effort"])
 334         require.Equal(t, "0|note: subagent at effort high\n\n1|user: Count.\n\n2|reply: Reply 0.\n\n3|user: And the hidden files?", subagentTestText(subagentTestLastItem(call)))
 335
 336         // The view of the new run holds the chat of now, with the first report.
 337         texts := turnInputTexts(t, call)
 338         require.Contains(t, strings.Join(texts[:len(texts)-2], ""), "work: ["+name+"]")
 339         require.Equal(t, "work: "+subagentReport(name, []string{"Reply 2."}), test.Log(t)[2])
 340
 341         _, err = runs.Tell(t.Context(), "BlueFox", "Hello.")
 342         require.EqualError(t, err, "no agent BlueFox")
 343 }
 344
 345 func TestStopEndsASubagentAndItsCommand(t *testing.T) {
 346         server := newModelFake(t)
 347         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 348                 modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"touch started && sleep 30"}`)}, 100, 0, 5))
 349         }
 350
 351         test := newTestTurnLoop(t, server)
 352         runs := test.loop.runs
 353         _, err := runs.Spawn(t.Context(), []string{"Wait long."}, nil)
 354         require.NoError(t, err)
 355
 356         name := test.events.Last("subagent")
 357         subagent, err := runs.subagents.Get(t.Context(), name)
 358         require.NoError(t, err)
 359
 360         require.Eventually(t, func() bool {
 361                 _, err := os.Stat(filepath.Join(subagent.WorkDir(), "started"))
 362                 return err == nil
 363         }, 10*time.Second, time.Millisecond)
 364
 365         start := time.Now()
 366         found, err := test.loop.StopSubagent(name)
 367         require.NoError(t, err)
 368         require.True(t, found)
 369
 370         test.events.WaitFor(t, "work", 1)
 371         require.Less(t, time.Since(start), 10*time.Second)
 372         require.Equal(t, []string{
 373                 "note: Stopped by the user: " + name + ".",
 374                 "work: " + subagentReport(name, []string{"stopped"}),
 375         }, test.Log(t))
 376         require.Equal(t, subagentStopped, test.events.LastEvent("work").Status)
 377         require.Equal(t, "subagent "+name+" stopped\n", test.logs.String())
 378
 379         log, err := subagent.Show()
 380         require.NoError(t, err)
 381         require.Contains(t, log, "echo: \n[interrupted]")
 382
 383         found, err = test.loop.StopSubagent(name)
 384         require.NoError(t, err)
 385         require.False(t, found)
 386
 387         time.Sleep(50 * time.Millisecond)
 388         require.Zero(t, test.events.Count("busy"))
 389 }
 390
 391 func TestCloseEndsTheSubagentsWithNoReport(t *testing.T) {
 392         server := newModelFake(t)
 393         arrived := make(chan struct{})
 394         release := make(chan struct{})
 395         t.Cleanup(func() {
 396                 close(release)
 397         })
 398
 399         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 400                 close(arrived)
 401                 <-release
 402         }
 403
 404         test := newTestTurnLoop(t, server)
 405         runs := test.loop.runs
 406         _, err := runs.Spawn(t.Context(), []string{"Wait."}, nil)
 407         require.NoError(t, err)
 408
 409         <-arrived
 410         runs.Close()
 411         require.Empty(t, runs.running)
 412         require.Empty(t, test.Log(t))
 413
 414         _, err = runs.Spawn(t.Context(), []string{"Again."}, nil)
 415         require.ErrorIs(t, err, errSubagentClosed)
 416
 417         entries, err := os.ReadDir(runs.subagents.dir)
 418         require.NoError(t, err)
 419         require.Len(t, entries, 1)
 420 }
 421
 422 func TestRestartResumesTheCutSubagents(t *testing.T) {
 423         server := newModelFake(t)
 424         arrived := make(chan struct{}, 1)
 425         release := make(chan struct{})
 426         t.Cleanup(func() {
 427                 close(release)
 428         })
 429
 430         var restarted atomic.Bool
 431         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 432                 switch {
 433                 case subagentTestCall(call) && !restarted.Load():
 434                         arrived <- struct{}{}
 435                         <-release
 436                 case subagentTestCall(call):
 437                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Built.")}, 100, 0, 5))
 438                 default:
 439                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 440                 }
 441         }
 442
 443         agent, err := openAgent(t.TempDir())
 444         require.NoError(t, err)
 445
 446         first := &TurnEventRecorder{}
 447         loop, _, stop := subagentTestStart(t, agent, server, first)
 448         _, err = loop.runs.Spawn(t.Context(), []string{"Build the project."}, nil)
 449         require.NoError(t, err)
 450
 451         <-arrived
 452         name := first.Last("subagent")
 453         stop()
 454         require.Zero(t, first.Count("work"))
 455
 456         data, err := os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 457         require.NoError(t, err)
 458         require.JSONEq(t, `{"running": ["`+name+`"]}`, string(data))
 459
 460         restarted.Store(true)
 461         second := &TurnEventRecorder{}
 462         loop, memory, stop := subagentTestStart(t, agent, server, second)
 463         defer stop()
 464
 465         second.WaitFor(t, "idle", 1)
 466         note := "The daemon restarted, cutting " + name + "; nothing was lost: go on."
 467         log := subagentTestChat(t, memory)
 468         require.Equal(t, []string{
 469                 "note: " + note,
 470                 "work: " + subagentReport(name, []string{"Built."}),
 471                 "reply: Noted.",
 472         }, log[len(log)-3:])
 473
 474         subagent, err := loop.runs.subagents.Get(t.Context(), name)
 475         require.NoError(t, err)
 476
 477         text, err := subagent.Show()
 478         require.NoError(t, err)
 479         require.Equal(t, "0|note: subagent\n\n1|user: Build the project.\n\n2|user: "+note+"\n\n3|reply: Built.", text)
 480
 481         data, err = os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 482         require.NoError(t, err)
 483         require.JSONEq(t, `{"running": []}`, string(data))
 484 }
 485
 486 func TestRestartReportsASubagentThatCannotGoOn(t *testing.T) {
 487         server := newModelFake(t)
 488         agent, err := openAgent(t.TempDir())
 489         require.NoError(t, err)
 490         require.NoError(t, os.WriteFile(filepath.Join(agent.dir, subagentWorkFileName), []byte(`{"running": ["BlueFox"]}`), 0o600))
 491
 492         events := &TurnEventRecorder{}
 493         _, memory, stop := subagentTestStart(t, agent, server, events)
 494         defer stop()
 495
 496         events.WaitFor(t, "idle", 1)
 497         require.Equal(t, []string{
 498                 "note: The daemon restarted, cutting BlueFox; nothing was lost: go on.",
 499                 "work: " + subagentReport("BlueFox", []string{"failed: no agent BlueFox"}),
 500                 "reply: a line",
 501         }, subagentTestChat(t, memory))
 502         require.Equal(t, subagentFailed, events.LastEvent("work").Status)
 503
 504         data, err := os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 505         require.NoError(t, err)
 506         require.JSONEq(t, `{"running": []}`, string(data))
 507 }
 508
 509 // subagentTestStart runs a loop of agent with its memory and subagents in the
 510 // agent directory, as the daemon does. The returned function stops the loop
 511 // and closes the files.
 512 func subagentTestStart(t *testing.T, agent *Agent, server *ModelFake, events *TurnEventRecorder) (*TurnLoop, *Memory, func()) {
 513         t.Helper()
 514
 515         agent.config.Workdir = t.TempDir()
 516         clock := newTestClock()
 517         memory, err := openMemory(t.Context(), agent.dir, clock.Now, newFakeSummarizer(), discardLog())
 518         require.NoError(t, err)
 519
 520         subagents := newSubagents(filepath.Join(agent.dir, subagentDirName), clock.Now, subagentNameRandom)
 521         client := newModelClient(server.URL, ModelAPIKey(modelTestKey), agent.CacheKey(), filepath.Join(agent.dir, "usage.jsonl"))
 522         whatsapp, _, _ := whatsappStartTest(t, t.TempDir(), clock)
 523         loop, err := newTurnLoop(agent, memory, subagents, whatsapp, newTestSchedules(t, clock.Now), client, clock.Now, discardLog(), events.Add)
 524         require.NoError(t, err)
 525
 526         ctx, cancel := context.WithCancel(t.Context())
 527         done := make(chan error)
 528         go func() {
 529                 done <- loop.Run(ctx)
 530         }()
 531
 532         return loop, memory, func() {
 533                 cancel()
 534                 require.ErrorIs(t, <-done, context.Canceled)
 535                 require.NoError(t, subagents.Close())
 536                 require.NoError(t, memory.Close())
 537         }
 538 }
 539
 540 // subagentTestChat returns each message of the chat in memory as
 541 // "kind: text".
 542 func subagentTestChat(t *testing.T, memory *Memory) []string {
 543         t.Helper()
 544
 545         var lines []string
 546         for id := range memory.Len() {
 547                 message, err := memory.Message(id)
 548                 require.NoError(t, err)
 549
 550                 lines = append(lines, message.Kind+": "+message.Text)
 551         }
 552
 553         return lines
 554 }
 555
 556 // subagentTestCall tells if call is a call of a subagent.
 557 func subagentTestCall(call ModelFakeCall) bool {
 558         instructions, _ := call.body["instructions"].(string)
 559
 560         return strings.HasPrefix(instructions, "You are a subagent")
 561 }
 562
 563 // subagentTestLastItem returns the last input item of call.
 564 func subagentTestLastItem(call ModelFakeCall) map[string]any {
 565         input := call.body["input"].([]any)
 566
 567         return input[len(input)-1].(map[string]any)
 568 }
 569
 570 // subagentTestText returns the text of the user message item, or "" for
 571 // another item.
 572 func subagentTestText(item map[string]any) string {
 573         content, _ := item["content"].([]any)
 574         var text strings.Builder
 575         for _, part := range content {
 576                 value, _ := part.(map[string]any)["text"].(string)
 577                 text.WriteString(value)
 578         }
 579
 580         return text.String()
 581 }