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

   1 package main
   2
   3 import (
   4         "context"
   5         "io"
   6         "log/slog"
   7         "net/http"
   8         "os"
   9         "path/filepath"
  10         "strconv"
  11         "strings"
  12         "sync/atomic"
  13         "testing"
  14         "time"
  15
  16         "github.com/stretchr/testify/require"
  17 )
  18
  19 // subagentTestFullContext is the error body of a call whose input does not fit
  20 // in the context of the model.
  21 const subagentTestFullContext = `{"error": {"message": "Your input exceeds the context window of this model.", "type": "invalid_request_error", "code": "context_length_exceeded"}}`
  22
  23 func TestSpawnRunsASubagentInTheBackground(t *testing.T) {
  24         server := newModelFake(t)
  25
  26         var test *TurnTestLoop
  27
  28         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
  29                 last := subagentTestLastItem(call)
  30                 switch {
  31                 case subagentTestCall(call) && last["type"] == "function_call_output":
  32                         // The report comes after the reply of the turn of the
  33                         // spawn.
  34                         test.events.WaitFor(t, "reply", 1)
  35                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("There are 3 files.")}, 100, 0, 5))
  36                 case subagentTestCall(call):
  37                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"pwd"}`)}, 100, 0, 5))
  38                 case last["type"] == "function_call_output":
  39                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Started.")}, 100, 0, 5))
  40                 case strings.HasPrefix(subagentTestText(last), "["):
  41                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
  42                 default:
  43                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "spawn", `{"tasks":["Count the files."],"effort":null}`)}, 100, 0, 5))
  44                 }
  45         }
  46
  47         test = newTestTurnLoop(t, server)
  48         _, err := test.loop.Submit(terminalSource, "Count the files in a subagent.")
  49         require.NoError(t, err)
  50         test.events.WaitFor(t, "idle", 2)
  51
  52         name := test.events.Last("subagent")
  53         require.True(t, subagentNameValid(name), name)
  54
  55         work := filepath.Join(test.loop.runs.subagents.dir, name, "work")
  56         require.DirExists(t, work)
  57
  58         report := "[" + name + "]\nThere are 3 files.\n\nFull chat: zoom(\"" + name + "\")"
  59         require.Equal(t, []string{
  60                 "user: Count the files in a subagent.",
  61                 `tool: spawn {"tasks":["Count the files."],"effort":null}`,
  62                 "echo: Started " + name + ". Each one's report will reach you as a message when it finishes.",
  63                 "reply: Started.",
  64                 "work: " + report,
  65                 "reply: Noted.",
  66         }, test.Log(t))
  67         require.Equal(t, Event{
  68                 Kind:   "work",
  69                 ID:     4,
  70                 Text:   report,
  71                 Source: name,
  72                 Status: subagentFinished,
  73         }, test.events.LastEvent("work"))
  74         require.Equal(t, "<6>subagent started name="+name+"\n<6>subagent done name="+name+" after=0s\n", test.logs.String())
  75
  76         var first, second *ModelFakeCall
  77
  78         for n := range server.Calls() {
  79                 call := server.Call(n)
  80                 if !subagentTestCall(call) {
  81                         continue
  82                 }
  83
  84                 if first == nil {
  85                         first = &call
  86                 } else {
  87                         second = &call
  88                 }
  89         }
  90
  91         require.NotNil(t, second)
  92
  93         // The first request of the subagent holds the view, the state, and its
  94         // whole log, with its own prompt and tools.
  95         texts := turnInputTexts(t, *first)
  96         view := strings.Join(texts[:len(texts)-2], "")
  97         require.True(t, strings.HasPrefix(view, "<chat>\n0+1|user: Count the files in a subagent.\n1+1|tool: spawn"), view)
  98         require.Equal(t, "</chat>\n\nNow: Thursday 2026-01-01 12:00 +00:00", texts[len(texts)-2])
  99         require.Equal(t, "0|note: subagent\n\n1|user: Count the files.", texts[len(texts)-1])
 100
 101         instructions, err := test.agent.SubagentPrompt()
 102         require.NoError(t, err)
 103         require.Equal(t, instructions, first.body["instructions"])
 104
 105         var tools []string
 106
 107         for _, tool := range first.body["tools"].([]any) {
 108                 tools = append(tools, tool.(map[string]any)["name"].(string))
 109         }
 110
 111         require.Equal(t, []string{"zoom", "date", "shell", "read", "write", "edit"}, tools)
 112         require.Equal(t, work+"\n", subagentTestLastItem(*second)["output"])
 113
 114         subagent, err := test.loop.runs.subagents.Get(t.Context(), name)
 115         require.NoError(t, err)
 116
 117         log, err := subagent.Show()
 118         require.NoError(t, err)
 119         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)
 120
 121         var agents []string
 122
 123         for _, record := range modelReadUsage(t, test.usagePath) {
 124                 agents = append(agents, record.Agent)
 125         }
 126
 127         require.ElementsMatch(t, []string{"", "", "", name, name}, agents)
 128 }
 129
 130 func TestReportJoinsTheNextRequestOfARunningTurn(t *testing.T) {
 131         server := newModelFake(t)
 132         arrived := make(chan struct{})
 133         release := make(chan struct{})
 134         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 135                 if call.number == 0 {
 136                         close(arrived)
 137                         <-release
 138                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "date", `{"id":0}`)}, 100, 0, 5))
 139
 140                         return
 141                 }
 142
 143                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("done")}, 100, 0, 5))
 144         }
 145
 146         test := newTestTurnLoop(t, server)
 147         _, err := test.loop.Submit(terminalSource, "first")
 148         require.NoError(t, err)
 149
 150         <-arrived
 151
 152         report := subagentReport("GreenOtter", []string{"It is done."})
 153         test.loop.Report("GreenOtter", report, subagentFinished)
 154         close(release)
 155
 156         test.events.WaitFor(t, "idle", 1)
 157         require.Equal(t, report, subagentTestText(subagentTestLastItem(server.Call(1))))
 158
 159         time.Sleep(50 * time.Millisecond)
 160         require.Equal(t, 2, server.Calls())
 161         require.Equal(t, 1, test.events.Count("busy"))
 162 }
 163
 164 func TestReportOfAStoppedSubagentStartsNoTurn(t *testing.T) {
 165         server := newModelFake(t)
 166         test := newTestTurnLoop(t, server)
 167         report := subagentReport("GreenOtter", []string{"failed: context canceled"})
 168         test.loop.Report("GreenOtter", report, subagentStopped)
 169
 170         test.events.WaitFor(t, "work", 1)
 171         time.Sleep(50 * time.Millisecond)
 172         require.Equal(t, []string{"work: " + report}, test.Log(t))
 173         require.Zero(t, server.Calls())
 174         require.Zero(t, test.events.Count("busy"))
 175 }
 176
 177 func TestFullContextGivesAFailedReport(t *testing.T) {
 178         server := newModelFake(t)
 179         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 180                 if subagentTestCall(call) {
 181                         w.WriteHeader(http.StatusBadRequest)
 182
 183                         _, _ = io.WriteString(w, subagentTestFullContext)
 184
 185                         return
 186                 }
 187
 188                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("It failed.")}, 100, 0, 5))
 189         }
 190
 191         test := newTestTurnLoop(t, server)
 192         _, err := test.loop.runs.Spawn(t.Context(), []string{"Read the big file."}, nil)
 193         require.NoError(t, err)
 194         test.events.WaitFor(t, "idle", 1)
 195
 196         name := test.events.Last("subagent")
 197         require.Equal(t, []string{
 198                 "work: [" + name + "]\nfailed: create model response: model call: HTTP 400: " + subagentTestFullContext + "\n\nFull chat: zoom(\"" + name + "\")",
 199                 "reply: It failed.",
 200         }, test.Log(t))
 201         require.Equal(t, subagentFailed, test.events.LastEvent("work").Status)
 202         require.Equal(t, "<6>subagent started name="+name+"\n<3>subagent failed name="+name+" after=0s: create model response: model call: HTTP 400: "+subagentTestFullContext+"\n", test.logs.String())
 203 }
 204
 205 func TestSubagentHasItsOwnEffortAndNoSpawn(t *testing.T) {
 206         server := newModelFake(t)
 207         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 208                 if subagentTestCall(call) && subagentTestLastItem(call)["type"] != "function_call_output" {
 209                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "spawn", `{"tasks":["More."],"effort":null}`)}, 100, 0, 5))
 210
 211                         return
 212                 }
 213
 214                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("ok")}, 100, 0, 5))
 215         }
 216
 217         test := newTestTurnLoop(t, server)
 218         runs := test.loop.runs
 219         _, err := runs.Spawn(t.Context(), nil, nil)
 220         require.EqualError(t, err, "no tasks")
 221
 222         effort := "max"
 223         _, err = runs.Spawn(t.Context(), []string{"Think."}, &effort)
 224         require.EqualError(t, err, `no effort "max": one of low, medium, high, xhigh`)
 225
 226         effort = "high"
 227         _, err = runs.Spawn(t.Context(), []string{"Think hard."}, &effort)
 228         require.NoError(t, err)
 229         test.events.WaitFor(t, "idle", 1)
 230
 231         for n := range server.Calls() {
 232                 call := server.Call(n)
 233                 if subagentTestCall(call) {
 234                         require.Equal(t, "high", call.body["reasoning"].(map[string]any)["effort"])
 235                 }
 236         }
 237
 238         subagent, err := runs.subagents.Get(t.Context(), test.events.Last("subagent"))
 239         require.NoError(t, err)
 240
 241         log, err := subagent.Show()
 242         require.NoError(t, err)
 243         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)
 244
 245         entries, err := os.ReadDir(runs.subagents.dir)
 246         require.NoError(t, err)
 247         require.Len(t, entries, 1)
 248 }
 249
 250 func TestTellReachesARunningSubagentBetweenItsToolCalls(t *testing.T) {
 251         server := newModelFake(t)
 252         arrived := make(chan struct{})
 253         told := make(chan struct{})
 254         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 255                 switch {
 256                 case !subagentTestCall(call):
 257                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 258                 case call.number == 0:
 259                         close(arrived)
 260                         <-told
 261                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"true"}`)}, 100, 0, 5))
 262                 default:
 263                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Used the second disk.")}, 100, 0, 5))
 264                 }
 265         }
 266
 267         test := newTestTurnLoop(t, server)
 268         runs := test.loop.runs
 269         _, err := runs.Spawn(t.Context(), []string{"Copy the files."}, nil)
 270         require.NoError(t, err)
 271
 272         <-arrived
 273
 274         name := test.events.Last("subagent")
 275         output, err := runs.Tell(t.Context(), name, "Use the second disk.")
 276         require.NoError(t, err)
 277         require.Equal(t, "Sent. "+name+" reads it between its tool calls, and its report answers it.", output)
 278         close(told)
 279
 280         test.events.WaitFor(t, "idle", 1)
 281         require.Equal(t, "Use the second disk.", subagentTestText(subagentTestLastItem(server.Call(1))))
 282         require.Equal(t, "work: "+subagentReport(name, []string{"Used the second disk."}), test.Log(t)[0])
 283 }
 284
 285 func TestTellAfterTheFinalAnswerStartsAnotherChain(t *testing.T) {
 286         server := newModelFake(t)
 287         arrived := make(chan struct{})
 288         told := make(chan struct{})
 289         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 290                 switch {
 291                 case !subagentTestCall(call):
 292                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 293                 case call.number == 0:
 294                         close(arrived)
 295                         <-told
 296                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("First.")}, 100, 0, 5))
 297                 default:
 298                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Second.")}, 100, 0, 5))
 299                 }
 300         }
 301
 302         test := newTestTurnLoop(t, server)
 303         runs := test.loop.runs
 304         _, err := runs.Spawn(t.Context(), []string{"Count."}, nil)
 305         require.NoError(t, err)
 306
 307         <-arrived
 308
 309         name := test.events.Last("subagent")
 310         _, err = runs.Tell(t.Context(), name, "Count again.")
 311         require.NoError(t, err)
 312         close(told)
 313
 314         test.events.WaitFor(t, "idle", 1)
 315         require.Equal(t, "0|note: subagent\n\n1|user: Count.\n\n2|user: Count again.\n\n3|reply: First.", subagentTestText(subagentTestLastItem(server.Call(1))))
 316         require.Equal(t, "work: "+subagentReport(name, []string{"First.", "Second."}), test.Log(t)[0])
 317 }
 318
 319 func TestTellToAFinishedSubagentGoesOnFromItsLog(t *testing.T) {
 320         server := newModelFake(t)
 321         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 322                 text := "Noted."
 323                 if subagentTestCall(call) {
 324                         text = "Reply " + strconv.Itoa(call.number) + "."
 325                 }
 326
 327                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem(text)}, 100, 0, 5))
 328         }
 329
 330         test := newTestTurnLoop(t, server)
 331         runs := test.loop.runs
 332         effort := "high"
 333         _, err := runs.Spawn(t.Context(), []string{"Count."}, &effort)
 334         require.NoError(t, err)
 335         test.events.WaitFor(t, "idle", 1)
 336
 337         name := test.events.Last("subagent")
 338         output, err := runs.Tell(t.Context(), name, "And the hidden files?")
 339         require.NoError(t, err)
 340         require.Equal(t, "Sent. "+name+"'s reply will reach you as a message.", output)
 341         test.events.WaitFor(t, "idle", 2)
 342
 343         call := server.Call(2)
 344         require.True(t, subagentTestCall(call))
 345         require.Equal(t, "high", call.body["reasoning"].(map[string]any)["effort"])
 346         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)))
 347
 348         // The view of the new run holds the chat of now, with the first report.
 349         texts := turnInputTexts(t, call)
 350         require.Contains(t, strings.Join(texts[:len(texts)-2], ""), "work: ["+name+"]")
 351         require.Equal(t, "work: "+subagentReport(name, []string{"Reply 2."}), test.Log(t)[2])
 352
 353         _, err = runs.Tell(t.Context(), "BlueFox", "Hello.")
 354         require.EqualError(t, err, "no agent BlueFox")
 355 }
 356
 357 func TestStopEndsASubagentAndItsCommand(t *testing.T) {
 358         server := newModelFake(t)
 359         server.reply = func(w http.ResponseWriter, _ ModelFakeCall) {
 360                 modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "shell", `{"command":"touch started && sleep 30"}`)}, 100, 0, 5))
 361         }
 362
 363         test := newTestTurnLoop(t, server)
 364         runs := test.loop.runs
 365         _, err := runs.Spawn(t.Context(), []string{"Wait long."}, nil)
 366         require.NoError(t, err)
 367
 368         name := test.events.Last("subagent")
 369         subagent, err := runs.subagents.Get(t.Context(), name)
 370         require.NoError(t, err)
 371
 372         require.Eventually(t, func() bool {
 373                 _, err := os.Stat(filepath.Join(subagent.WorkDir(), "started"))
 374                 return err == nil
 375         }, 10*time.Second, time.Millisecond)
 376
 377         start := time.Now()
 378         found, err := test.loop.StopSubagent(name)
 379         require.NoError(t, err)
 380         require.True(t, found)
 381
 382         test.events.WaitFor(t, "work", 1)
 383         require.Less(t, time.Since(start), 10*time.Second)
 384         require.Equal(t, []string{
 385                 "note: Stopped by the user: " + name + ".",
 386                 "work: " + subagentReport(name, []string{"stopped"}),
 387         }, test.Log(t))
 388         require.Equal(t, subagentStopped, test.events.LastEvent("work").Status)
 389         require.Equal(t, "<6>subagent started name="+name+"\n<6>subagent stopped name="+name+" after=0s\n", test.logs.String())
 390
 391         log, err := subagent.Show()
 392         require.NoError(t, err)
 393         require.Contains(t, log, "echo: \n[interrupted]")
 394
 395         found, err = test.loop.StopSubagent(name)
 396         require.NoError(t, err)
 397         require.False(t, found)
 398
 399         time.Sleep(50 * time.Millisecond)
 400         require.Zero(t, test.events.Count("busy"))
 401 }
 402
 403 func TestCloseEndsTheSubagentsWithNoReport(t *testing.T) {
 404         server := newModelFake(t)
 405         arrived := make(chan struct{})
 406         release := make(chan struct{})
 407         t.Cleanup(func() {
 408                 close(release)
 409         })
 410
 411         server.reply = func(_ http.ResponseWriter, _ ModelFakeCall) {
 412                 close(arrived)
 413                 <-release
 414         }
 415
 416         test := newTestTurnLoop(t, server)
 417         runs := test.loop.runs
 418         _, err := runs.Spawn(t.Context(), []string{"Wait."}, nil)
 419         require.NoError(t, err)
 420
 421         <-arrived
 422         runs.Close()
 423         require.Empty(t, runs.running)
 424         require.Empty(t, test.Log(t))
 425
 426         _, err = runs.Spawn(t.Context(), []string{"Again."}, nil)
 427         require.ErrorIs(t, err, errSubagentClosed)
 428
 429         entries, err := os.ReadDir(runs.subagents.dir)
 430         require.NoError(t, err)
 431         require.Len(t, entries, 1)
 432 }
 433
 434 func TestRestartResumesTheCutSubagents(t *testing.T) {
 435         server := newModelFake(t)
 436         arrived := make(chan struct{}, 1)
 437         release := make(chan struct{})
 438         t.Cleanup(func() {
 439                 close(release)
 440         })
 441
 442         var restarted atomic.Bool
 443
 444         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 445                 switch {
 446                 case subagentTestCall(call) && !restarted.Load():
 447                         arrived <- struct{}{}
 448
 449                         <-release
 450                 case subagentTestCall(call):
 451                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Built.")}, 100, 0, 5))
 452                 default:
 453                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Noted.")}, 100, 0, 5))
 454                 }
 455         }
 456
 457         agent, err := openAgent(t.TempDir())
 458         require.NoError(t, err)
 459
 460         first := &TurnEventRecorder{}
 461         loop, _, stop := subagentTestStart(t, agent, server, first, discardLog())
 462         _, err = loop.runs.Spawn(t.Context(), []string{"Build the project."}, nil)
 463         require.NoError(t, err)
 464
 465         <-arrived
 466
 467         name := first.Last("subagent")
 468
 469         stop()
 470         require.Zero(t, first.Count("work"))
 471
 472         data, err := os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 473         require.NoError(t, err)
 474         require.JSONEq(t, `{"running": ["`+name+`"]}`, string(data))
 475
 476         restarted.Store(true)
 477
 478         second := &TurnEventRecorder{}
 479         loop, memory, stop := subagentTestStart(t, agent, server, second, discardLog())
 480         defer stop()
 481
 482         second.WaitFor(t, "idle", 1)
 483
 484         note := "The daemon restarted, cutting " + name + "; nothing was lost: go on."
 485         log := subagentTestChat(t, memory)
 486         require.Equal(t, []string{
 487                 "note: " + note,
 488                 "work: " + subagentReport(name, []string{"Built."}),
 489                 "reply: Noted.",
 490         }, log[len(log)-3:])
 491
 492         subagent, err := loop.runs.subagents.Get(t.Context(), name)
 493         require.NoError(t, err)
 494
 495         text, err := subagent.Show()
 496         require.NoError(t, err)
 497         require.Equal(t, "0|note: subagent\n\n1|user: Build the project.\n\n2|user: "+note+"\n\n3|reply: Built.", text)
 498
 499         data, err = os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 500         require.NoError(t, err)
 501         require.JSONEq(t, `{"running": []}`, string(data))
 502 }
 503
 504 func TestRestartReportsASubagentThatCannotGoOn(t *testing.T) {
 505         server := newModelFake(t)
 506         agent, err := openAgent(t.TempDir())
 507         require.NoError(t, err)
 508         require.NoError(t, os.WriteFile(filepath.Join(agent.dir, subagentWorkFileName), []byte(`{"running": ["BlueFox"]}`), 0o600))
 509
 510         events := &TurnEventRecorder{}
 511         logs := &SyncBuffer{}
 512         _, memory, stop := subagentTestStart(t, agent, server, events, daemonTestLogger(logs))
 513         defer stop()
 514
 515         events.WaitFor(t, "idle", 1)
 516         require.Equal(t, []string{
 517                 "note: The daemon restarted, cutting BlueFox; nothing was lost: go on.",
 518                 "work: " + subagentReport("BlueFox", []string{"failed: no agent BlueFox"}),
 519                 "reply: a line",
 520         }, subagentTestChat(t, memory))
 521         require.Equal(t, subagentFailed, events.LastEvent("work").Status)
 522         require.Equal(t, "<3>subagent lost at restart name=BlueFox: no agent BlueFox\n", logs.String())
 523
 524         data, err := os.ReadFile(filepath.Join(agent.dir, subagentWorkFileName))
 525         require.NoError(t, err)
 526         require.JSONEq(t, `{"running": []}`, string(data))
 527 }
 528
 529 // subagentTestStart runs a loop of agent with its memory and subagents in the
 530 // agent directory, as the daemon does. The returned function stops the loop
 531 // and closes the files.
 532 func subagentTestStart(t *testing.T, agent *Agent, server *ModelFake, events *TurnEventRecorder, logger *slog.Logger) (*TurnLoop, *Memory, func()) {
 533         t.Helper()
 534
 535         agent.config.Workdir = t.TempDir()
 536         clock := newTestClock()
 537         memory, err := openMemory(t.Context(), agent.dir, clock.Now, newFakeSummarizer(), discardLog())
 538         require.NoError(t, err)
 539
 540         subagents := newSubagents(filepath.Join(agent.dir, subagentDirName), clock.Now, subagentNameRandom)
 541         client := newModelClient(server.URL, ModelAPIKey(modelTestKey), agent.CacheKey(), filepath.Join(agent.dir, "usage.jsonl"))
 542         whatsapp, _, _ := whatsappStartTest(t, t.TempDir(), clock)
 543         loop, err := newTurnLoop(agent, memory, subagents, whatsapp, newTestSchedules(t, clock.Now), client, clock.Now, logger, events.Add)
 544         require.NoError(t, err)
 545
 546         ctx, cancel := context.WithCancel(t.Context())
 547         done := make(chan error)
 548         go func() {
 549                 done <- loop.Run(ctx)
 550         }()
 551
 552         return loop, memory, func() {
 553                 cancel()
 554                 require.ErrorIs(t, <-done, context.Canceled)
 555                 require.NoError(t, subagents.Close())
 556                 require.NoError(t, memory.Close())
 557         }
 558 }
 559
 560 // subagentTestChat returns each message of the chat in memory as
 561 // "kind: text".
 562 func subagentTestChat(t *testing.T, memory *Memory) []string {
 563         t.Helper()
 564
 565         var lines []string
 566
 567         for id := range memory.Len() {
 568                 message, err := memory.Message(id)
 569                 require.NoError(t, err)
 570
 571                 lines = append(lines, message.Kind+": "+message.Text)
 572         }
 573
 574         return lines
 575 }
 576
 577 // subagentTestCall tells if call is a call of a subagent.
 578 func subagentTestCall(call ModelFakeCall) bool {
 579         instructions, _ := call.body["instructions"].(string)
 580
 581         return strings.HasPrefix(instructions, "You are a subagent")
 582 }
 583
 584 // subagentTestLastItem returns the last input item of call.
 585 func subagentTestLastItem(call ModelFakeCall) map[string]any {
 586         input := call.body["input"].([]any)
 587
 588         return input[len(input)-1].(map[string]any)
 589 }
 590
 591 // subagentTestText returns the text of the user message item, or "" for
 592 // another item.
 593 func subagentTestText(item map[string]any) string {
 594         content, _ := item["content"].([]any)
 595
 596         var text strings.Builder
 597
 598         for _, part := range content {
 599                 value, _ := part.(map[string]any)["text"].(string)
 600                 text.WriteString(value)
 601         }
 602
 603         return text.String()
 604 }