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

   1 package main
   2
   3 import (
   4         "log"
   5         "net/http"
   6         "os"
   7         "path/filepath"
   8         "slices"
   9         "strconv"
  10         "strings"
  11         "testing"
  12         "time"
  13
  14         "github.com/stretchr/testify/require"
  15 )
  16
  17 func TestOwnerTalksToTheAgentThroughTelegram(t *testing.T) {
  18         server := newModelFake(t)
  19         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
  20                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Hello from the agent.")}, 100, 0, 5))
  21         }
  22
  23         telegram := newTelegramFake(t)
  24         bot, _ := telegramStartTestBot(t, telegram)
  25         socket := daemonStartTestWithBot(t, server, bot)
  26         terminal := terminalStartTestClient(t, socket)
  27         terminal.WaitFor(t, "[connected to OneChat]")
  28
  29         telegram.Add(TelegramUpdate{
  30                 UpdateID: 1,
  31                 Message:  telegramOwnerMessage("hi from the phone"),
  32         })
  33
  34         terminal.WaitFor(t, "[telegram] hi from the phone\n[working]\nHello from the agent.\n[done]")
  35         telegramWaitForSent(t, telegram, "Hello from the agent.")
  36         require.True(t, slices.ContainsFunc(telegram.Calls(), func(call TelegramFakeCall) bool {
  37                 return call.method == "sendChatAction" && call.params["action"] == "typing"
  38         }))
  39
  40         terminal.Type("hi from the desk")
  41         require.Equal(t, []string{"Hello from the agent.", "[terminal] hi from the desk", "Hello from the agent."}, telegramWaitForSent(t, telegram, "Hello from the agent.", "[terminal] hi from the desk", "Hello from the agent."))
  42 }
  43
  44 func TestBotIgnoresEveryoneButTheOwner(t *testing.T) {
  45         telegram := newTelegramFake(t)
  46         bot, logs := telegramStartTestBot(t, telegram)
  47         socket := daemonStartTestWithBot(t, newModelFake(t), bot)
  48         terminal := terminalStartTestClient(t, socket)
  49         terminal.WaitFor(t, "[connected to OneChat]")
  50
  51         group := telegramOwnerMessage("secret in a group")
  52         group.Chat = TelegramChat{
  53                 ID:   -100,
  54                 Type: "group",
  55         }
  56
  57         stranger := telegramOwnerMessage("secret of a stranger")
  58         stranger.Chat.ID = 77
  59         stranger.From.ID = 77
  60
  61         unsigned := telegramOwnerMessage("secret with no sender")
  62         unsigned.From = nil
  63
  64         for id, message := range []*TelegramMessage{group, stranger, unsigned, nil} {
  65                 telegram.Add(TelegramUpdate{
  66                         UpdateID: int64(10 + id),
  67                         Message:  message,
  68                 })
  69         }
  70
  71         require.Eventually(t, func() bool {
  72                 offset, err := telegramLoadOffset(bot.offsetPath)
  73                 return err == nil && offset == 14
  74         }, 10*time.Second, time.Millisecond)
  75
  76         require.Empty(t, telegram.Sent())
  77         require.NotContains(t, terminal.Output(), "secret")
  78         require.NotContains(t, logs.String(), "secret")
  79         require.Contains(t, logs.String(), "message ignored")
  80 }
  81
  82 func TestBotAnswersThatOnlyTextIsSupported(t *testing.T) {
  83         telegram := newTelegramFake(t)
  84         bot, _ := telegramStartTestBot(t, telegram)
  85         daemonStartTestWithBot(t, newModelFake(t), bot)
  86
  87         telegram.Add(TelegramUpdate{
  88                 UpdateID: 1,
  89                 Message:  telegramOwnerMessage(""),
  90         })
  91
  92         telegramWaitForSent(t, telegram, telegramTextOnly)
  93 }
  94
  95 func TestStopFromTelegramInterruptsTheTurn(t *testing.T) {
  96         server := newModelFake(t)
  97         arrived := make(chan struct{})
  98         release := make(chan struct{})
  99         t.Cleanup(func() {
 100                 close(release)
 101         })
 102
 103         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 104                 close(arrived)
 105                 <-release
 106         }
 107
 108         telegram := newTelegramFake(t)
 109         bot, _ := telegramStartTestBot(t, telegram)
 110         daemonStartTestWithBot(t, server, bot)
 111
 112         telegram.Add(TelegramUpdate{
 113                 UpdateID: 1,
 114                 Message:  telegramOwnerMessage("a long task"),
 115         })
 116
 117         <-arrived
 118         telegram.Add(TelegramUpdate{
 119                 UpdateID: 2,
 120                 Message:  telegramOwnerMessage(stopCommand),
 121         })
 122
 123         telegramWaitForSent(t, telegram, "Error: interrupted")
 124
 125         telegram.Add(TelegramUpdate{
 126                 UpdateID: 3,
 127                 Message:  telegramOwnerMessage(stopCommand),
 128         })
 129
 130         telegramWaitForSent(t, telegram, "Error: interrupted", "No turn runs.")
 131
 132         telegram.Add(TelegramUpdate{
 133                 UpdateID: 4,
 134                 Message:  telegramOwnerMessage(stopCommand + " BlueFox"),
 135         })
 136
 137         telegramWaitForSent(t, telegram, "No turn runs.", "No subagent BlueFox runs.")
 138 }
 139
 140 func TestBotShowsOnlyTheStartAndTheEndOfASubagent(t *testing.T) {
 141         telegram := newTelegramFake(t)
 142         server := newModelFake(t)
 143         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 144                 last := subagentTestLastItem(call)
 145                 switch {
 146                 case subagentTestCall(call):
 147                         // The report comes after the reply of the turn of the spawn.
 148                         require.Eventually(t, func() bool {
 149                                 return slices.Contains(telegram.Sent(), "Started.")
 150                         }, 10*time.Second, time.Millisecond)
 151                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("There are 3 files.")}, 100, 0, 5))
 152                 case last["type"] == "function_call_output":
 153                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Started.")}, 100, 0, 5))
 154                 case strings.HasPrefix(subagentTestText(last), "["):
 155                         modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("It counted 3 files.")}, 100, 0, 5))
 156                 default:
 157                         modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "spawn", `{"tasks":["Count the files."],"effort":null}`)}, 100, 0, 5))
 158                 }
 159         }
 160
 161         bot, _ := telegramStartTestBot(t, telegram)
 162         daemonStartTestWithBot(t, server, bot)
 163         telegram.Add(TelegramUpdate{
 164                 UpdateID: 1,
 165                 Message:  telegramOwnerMessage("Count the files in a subagent."),
 166         })
 167
 168         require.Eventually(t, func() bool {
 169                 return slices.Contains(telegram.Sent(), "It counted 3 files.")
 170         }, 10*time.Second, time.Millisecond)
 171
 172         sent := telegram.Sent()
 173         name := strings.TrimSuffix(strings.TrimPrefix(sent[0], "["), "] started")
 174         require.True(t, subagentNameValid(name), sent[0])
 175         require.Equal(t, []string{
 176                 "[" + name + "] started",
 177                 "Started.",
 178                 "[" + name + "] finished",
 179                 "It counted 3 files.",
 180         }, sent)
 181 }
 182
 183 func TestBotSkipsTheWorkOfWhatsAppAndTheSchedules(t *testing.T) {
 184         bot := &TelegramBot{
 185                 ready: make(chan struct{}, 1),
 186         }
 187
 188         bot.Notify(Event{
 189                 Kind:   "work",
 190                 Source: whatsappSource,
 191                 Text:   "[WhatsApp] Ana Souza",
 192         })
 193         bot.Notify(Event{
 194                 Kind:   "work",
 195                 Source: scheduleSource,
 196                 Text:   "[Schedule 1] Sunday 2026-11-08 20:05 -03:00, once",
 197         })
 198         require.Empty(t, bot.queue)
 199 }
 200
 201 func TestBotStartsAtTheStoredOffset(t *testing.T) {
 202         server := newModelFake(t)
 203         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 204                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("ok")}, 100, 0, 5))
 205         }
 206
 207         telegram := newTelegramFake(t)
 208         bot, _ := telegramStartTestBot(t, telegram)
 209         require.NoError(t, telegramSaveOffset(bot.offsetPath, 10))
 210
 211         telegram.Add(TelegramUpdate{
 212                 UpdateID: 9,
 213                 Message:  telegramOwnerMessage("handled before the restart"),
 214         })
 215
 216         telegram.Add(TelegramUpdate{
 217                 UpdateID: 10,
 218                 Message:  telegramOwnerMessage("new after the restart"),
 219         })
 220
 221         socket := daemonStartTestWithBot(t, server, bot)
 222         terminal := terminalStartTestClient(t, socket)
 223         terminal.WaitFor(t, "[connected to OneChat]")
 224         telegramWaitForSent(t, telegram, "ok")
 225
 226         require.InDelta(t, float64(10), telegram.Calls()[0].params["offset"], 0)
 227         require.NotContains(t, terminal.Output(), "handled before the restart")
 228
 229         require.Eventually(t, func() bool {
 230                 offset, err := telegramLoadOffset(bot.offsetPath)
 231                 return err == nil && offset == 11
 232         }, 10*time.Second, time.Millisecond)
 233 }
 234
 235 func TestBotTriesAgainAfterFailures(t *testing.T) {
 236         server := newModelFake(t)
 237         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 238                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("ok")}, 100, 0, 5))
 239         }
 240
 241         telegram := newTelegramFake(t)
 242         failures := map[string]int{
 243                 "getUpdates":      2,
 244                 "sendRichMessage": 1,
 245         }
 246
 247         telegram.fail = func(call TelegramFakeCall) (int, string) {
 248                 if failures[call.method] == 0 {
 249                         return 0, ""
 250                 }
 251
 252                 failures[call.method]--
 253                 if call.method == "sendRichMessage" {
 254                         return http.StatusTooManyRequests, "Too Many Requests: retry after 1"
 255                 }
 256
 257                 return http.StatusBadGateway, "Bad Gateway"
 258         }
 259
 260         bot, logs := telegramStartTestBot(t, telegram)
 261         daemonStartTestWithBot(t, server, bot)
 262
 263         telegram.Add(TelegramUpdate{
 264                 UpdateID: 1,
 265                 Message:  telegramOwnerMessage("hello"),
 266         })
 267
 268         telegramWaitForSent(t, telegram, "ok")
 269         require.Contains(t, logs.String(), "502")
 270         require.Contains(t, logs.String(), "429")
 271         require.NotContains(t, logs.String(), telegramTestToken)
 272 }
 273
 274 func TestDeliverTriesAgainAfterATimeout(t *testing.T) {
 275         telegram := newTelegramFake(t)
 276         stalls := 1
 277         telegram.stall = func(call TelegramFakeCall) bool {
 278                 if call.method != "sendMessage" || stalls == 0 {
 279                         return false
 280                 }
 281
 282                 stalls--
 283
 284                 return true
 285         }
 286
 287         bot, logs := telegramStartTestBot(t, telegram)
 288         bot.api.sendTimeout = 50 * time.Millisecond
 289         bot.deliver(t.Context(), TelegramPart{
 290                 text: "hello",
 291         })
 292
 293         require.Equal(t, []string{"hello"}, telegram.Sent())
 294         require.Len(t, telegram.Calls(), 2)
 295         require.Contains(t, logs.String(), "send failed: no answer in 50ms (retry in 1ms)\n")
 296         require.Contains(t, logs.String(), "send back after ")
 297         require.Equal(t, 2, strings.Count(logs.String(), "\n"))
 298         require.NotContains(t, logs.String(), telegramTestToken)
 299 }
 300
 301 func TestRepliesGoAsRichMessages(t *testing.T) {
 302         reply := "**Done.** The table:\n\n| Name | Size |\n|:-----|-----:|\n| `a.go` | 10 |\n\n- one\n- two\n\n```go\nx := 1\n```"
 303         server := newModelFake(t)
 304         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 305                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem(reply)}, 100, 0, 5))
 306         }
 307
 308         telegram := newTelegramFake(t)
 309         bot, _ := telegramStartTestBot(t, telegram)
 310         socket := daemonStartTestWithBot(t, server, bot)
 311         terminal := terminalStartTestClient(t, socket)
 312         terminal.WaitFor(t, "[connected to OneChat]")
 313
 314         terminal.Type("make **it** so")
 315         telegramWaitForSent(t, telegram, "[terminal] make **it** so", reply)
 316
 317         telegram.Add(TelegramUpdate{
 318                 UpdateID: 1,
 319                 Message:  telegramOwnerMessage(""),
 320         })
 321
 322         telegramWaitForSent(t, telegram, telegramTextOnly)
 323
 324         var sends []TelegramFakeCall
 325         for _, call := range telegram.Calls() {
 326                 if call.method == "sendMessage" || call.method == "sendRichMessage" {
 327                         sends = append(sends, call)
 328                 }
 329         }
 330
 331         require.Equal(t, []TelegramFakeCall{
 332                 {
 333                         method: "sendMessage",
 334                         params: map[string]any{
 335                                 "chat_id": float64(telegramTestOwner),
 336                                 "text":    "[terminal] make **it** so",
 337                         },
 338                         ok: true,
 339                 },
 340                 {
 341                         method: "sendRichMessage",
 342                         params: map[string]any{
 343                                 "chat_id": float64(telegramTestOwner),
 344                                 "rich_message": map[string]any{
 345                                         "markdown": reply,
 346                                 },
 347                         },
 348                         ok: true,
 349                 },
 350                 {
 351                         method: "sendMessage",
 352                         params: map[string]any{
 353                                 "chat_id": float64(telegramTestOwner),
 354                                 "text":    telegramTextOnly,
 355                         },
 356                         ok: true,
 357                 },
 358         }, sends)
 359 }
 360
 361 func TestRichMessageFailures(t *testing.T) {
 362         testCases := []struct {
 363                 name    string
 364                 status  int
 365                 always  bool
 366                 methods []string
 367                 sent    []string
 368                 lines   int
 369                 logText string
 370         }{
 371                 {
 372                         name:    "bad request sends the reply once with entities",
 373                         status:  http.StatusBadRequest,
 374                         always:  true,
 375                         methods: []string{"sendRichMessage", "sendMessage"},
 376                         sent:    []string{"a secret word"},
 377                         lines:   1,
 378                         logText: "reply sent with simple formatting",
 379                 },
 380                 {
 381                         name:    "unknown method sends the reply once with entities",
 382                         status:  http.StatusNotFound,
 383                         always:  true,
 384                         methods: []string{"sendRichMessage", "sendMessage"},
 385                         sent:    []string{"a secret word"},
 386                         lines:   1,
 387                         logText: "reply sent with simple formatting",
 388                 },
 389                 {
 390                         name:    "rate limit tries the rich message again",
 391                         status:  http.StatusTooManyRequests,
 392                         methods: []string{"sendRichMessage", "sendRichMessage"},
 393                         sent:    []string{"a **secret** word"},
 394                         lines:   2,
 395                         logText: "send failed: 429",
 396                 },
 397                 {
 398                         name:    "server error tries the rich message again",
 399                         status:  http.StatusInternalServerError,
 400                         methods: []string{"sendRichMessage", "sendRichMessage"},
 401                         sent:    []string{"a **secret** word"},
 402                         lines:   2,
 403                         logText: "send failed: 500",
 404                 },
 405                 {
 406                         name:    "other refusal drops the reply",
 407                         status:  http.StatusForbidden,
 408                         always:  true,
 409                         methods: []string{"sendRichMessage"},
 410                         lines:   1,
 411                         logText: "reply lost: 403",
 412                 },
 413         }
 414
 415         for _, tc := range testCases {
 416                 t.Run(tc.name, func(t *testing.T) {
 417                         telegram := newTelegramFake(t)
 418                         failed := false
 419                         telegram.fail = func(call TelegramFakeCall) (int, string) {
 420                                 if call.method != "sendRichMessage" || failed && !tc.always {
 421                                         return 0, ""
 422                                 }
 423
 424                                 failed = true
 425
 426                                 return tc.status, "refused for bot" + telegramTestToken
 427                         }
 428
 429                         bot, logs := telegramStartTestBot(t, telegram)
 430                         bot.post(t.Context(), Event{
 431                                 Kind: "reply",
 432                                 Text: "a **secret** word",
 433                         })
 434
 435                         var methods []string
 436                         for _, call := range telegram.Calls() {
 437                                 methods = append(methods, call.method)
 438                         }
 439
 440                         require.Equal(t, tc.methods, methods)
 441                         require.Equal(t, tc.sent, telegram.Sent())
 442                         require.Equal(t, tc.lines, strings.Count(logs.String(), "\n"))
 443                         require.Contains(t, logs.String(), tc.logText)
 444                         require.NotContains(t, logs.String(), telegramTestToken)
 445                         require.NotContains(t, logs.String(), "secret word")
 446
 447                         calls := telegram.Calls()
 448                         if calls[len(calls)-1].method == "sendMessage" {
 449                                 require.NotNil(t, calls[len(calls)-1].params["entities"])
 450                         }
 451                 })
 452         }
 453 }
 454
 455 func TestLongReplyGoesAsRichMessagesSplitBetweenBlocks(t *testing.T) {
 456         paragraphs := strings.Repeat("A paragraph of the reply.\n\n", telegramRichBytes/len("A paragraph of the reply.\n\n"))
 457         table := "| a | b |\n|---|---|\n| 1 | 2 |\n"
 458         reply := paragraphs + table
 459
 460         telegram := newTelegramFake(t)
 461         bot, _ := telegramStartTestBot(t, telegram)
 462         bot.post(t.Context(), Event{
 463                 Kind: "reply",
 464                 Text: reply,
 465         })
 466
 467         require.Equal(t, []string{paragraphs, table}, telegram.Sent())
 468 }
 469
 470 func TestReplyTagsGoAsText(t *testing.T) {
 471         testCases := []struct {
 472                 name   string
 473                 status int
 474                 sent   []string
 475         }{
 476                 {
 477                         name: "rich message escapes the tag outside code",
 478                         sent: []string{"a &lt;details> &amp; tag and `<b>`"},
 479                 },
 480                 {
 481                         name:   "entity fallback shows the tag as written",
 482                         status: http.StatusBadRequest,
 483                         sent:   []string{"a <details> & tag and <b>"},
 484                 },
 485         }
 486
 487         for _, tc := range testCases {
 488                 t.Run(tc.name, func(t *testing.T) {
 489                         telegram := newTelegramFake(t)
 490                         telegram.fail = func(call TelegramFakeCall) (int, string) {
 491                                 if call.method != "sendRichMessage" {
 492                                         return 0, ""
 493                                 }
 494
 495                                 return tc.status, "Bad Request"
 496                         }
 497
 498                         bot, _ := telegramStartTestBot(t, telegram)
 499                         bot.post(t.Context(), Event{
 500                                 Kind: "reply",
 501                                 Text: "a <details> & tag and `<b>`",
 502                         })
 503
 504                         require.Equal(t, tc.sent, telegram.Sent())
 505                 })
 506         }
 507 }
 508
 509 func TestLongReplySplitCountsTheEscapedTags(t *testing.T) {
 510         paragraph := "A <b> tag.\n\n"
 511         count := telegramRichBytes / len(paragraph)
 512         reply := strings.Repeat(paragraph, count)
 513         require.LessOrEqual(t, len(reply), telegramRichBytes)
 514
 515         telegram := newTelegramFake(t)
 516         bot, _ := telegramStartTestBot(t, telegram)
 517         bot.post(t.Context(), Event{
 518                 Kind: "reply",
 519                 Text: reply,
 520         })
 521
 522         sent := telegram.Sent()
 523         require.Len(t, sent, 2)
 524         require.Equal(t, telegramEscapeTags(reply), strings.Join(sent, ""))
 525
 526         for _, markdown := range sent {
 527                 require.LessOrEqual(t, len(markdown), telegramRichBytes)
 528         }
 529 }
 530
 531 func TestRefusedRichPartGoesWithTheTextAsWritten(t *testing.T) {
 532         paragraph := "A <b> & c.\n\n"
 533         reply := strings.Repeat(paragraph, telegramRichBytes/len(paragraph))
 534
 535         telegram := newTelegramFake(t)
 536         refused := false
 537         telegram.fail = func(call TelegramFakeCall) (int, string) {
 538                 if call.method != "sendRichMessage" || refused {
 539                         return 0, ""
 540                 }
 541
 542                 refused = true
 543
 544                 return http.StatusBadRequest, "Bad Request"
 545         }
 546
 547         bot, _ := telegramStartTestBot(t, telegram)
 548         bot.post(t.Context(), Event{
 549                 Kind: "reply",
 550                 Text: reply,
 551         })
 552
 553         var fallback, rich []string
 554         for _, call := range telegram.Calls() {
 555                 switch {
 556                 case !call.ok:
 557                 case call.method == "sendMessage":
 558                         fallback = append(fallback, call.params["text"].(string))
 559                 case call.method == "sendRichMessage":
 560                         rich = append(rich, call.params["rich_message"].(map[string]any)["markdown"].(string))
 561                 }
 562         }
 563
 564         require.Greater(t, len(fallback), 1)
 565         require.Len(t, rich, 1)
 566         require.True(t, strings.HasPrefix(reply, strings.Join(fallback, "")), "fallback text is not the reply as written")
 567
 568         for _, text := range fallback {
 569                 require.LessOrEqual(t, telegramUTF16Units(text), telegramMessageUnits)
 570         }
 571
 572         require.Equal(t, reply, strings.Join(fallback, "")+telegramUnescapeTags(rich[0]), "reply is not sent once and whole")
 573 }
 574
 575 func TestRefusedEntitiesGoAgainAsPlainText(t *testing.T) {
 576         telegram := newTelegramFake(t)
 577         telegram.fail = func(call TelegramFakeCall) (int, string) {
 578                 if call.params["entities"] == nil {
 579                         return 0, ""
 580                 }
 581
 582                 return http.StatusBadRequest, "Bad Request: can't parse entities of bot" + telegramTestToken
 583         }
 584
 585         bot, logs := telegramStartTestBot(t, telegram)
 586         text, entities := telegramMarkdownEntities("a **secret** word")
 587         bot.deliver(t.Context(), TelegramPart{
 588                 text:     text,
 589                 entities: entities,
 590         })
 591
 592         calls := telegram.Calls()
 593         require.Len(t, calls, 2)
 594         require.NotNil(t, calls[0].params["entities"])
 595         require.Nil(t, calls[1].params["entities"])
 596         require.Equal(t, []string{"a secret word"}, telegram.Sent())
 597         require.Equal(t, 1, strings.Count(logs.String(), "\n"))
 598         require.Contains(t, logs.String(), "reply sent as plain text")
 599         require.NotContains(t, logs.String(), telegramTestToken)
 600         require.NotContains(t, logs.String(), "secret word")
 601 }
 602
 603 func TestBotLogsNoTokenWhenTheNetworkFails(t *testing.T) {
 604         telegram := newTelegramFake(t)
 605         telegram.Close()
 606
 607         bot, logs := telegramStartTestBot(t, telegram)
 608         daemonStartTestWithBot(t, newModelFake(t), bot)
 609
 610         require.Eventually(t, func() bool {
 611                 return strings.Contains(logs.String(), "receive failed: no answer: ")
 612         }, 10*time.Second, time.Millisecond)
 613         require.NotContains(t, logs.String(), telegramTestToken)
 614 }
 615
 616 func TestBotLogsAnOutageOnlyAtItsStartAndEnd(t *testing.T) {
 617         server := newModelFake(t)
 618         server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
 619                 modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("ok")}, 100, 0, 5))
 620         }
 621
 622         telegram := newTelegramFake(t)
 623         failures := 5
 624         telegram.fail = func(call TelegramFakeCall) (int, string) {
 625                 if call.method != "getUpdates" || failures == 0 {
 626                         return 0, ""
 627                 }
 628
 629                 failures--
 630
 631                 return http.StatusBadGateway, "Bad Gateway"
 632         }
 633
 634         bot, logs := telegramStartTestBot(t, telegram)
 635         daemonStartTestWithBot(t, server, bot)
 636
 637         telegram.Add(TelegramUpdate{
 638                 UpdateID: 1,
 639                 Message:  telegramOwnerMessage("a secret word"),
 640         })
 641
 642         telegramWaitForSent(t, telegram, "ok")
 643         lines := strings.Split(strings.TrimSuffix(logs.String(), "\n"), "\n")
 644         require.Len(t, lines, 2)
 645         require.Equal(t, "receive failed: 502 Bad Gateway (retry in 1ms)", lines[0])
 646         require.Regexp(t, `^receive back after [0-9]+m?s$`, lines[1])
 647         require.NotContains(t, logs.String(), "secret word")
 648         require.NotContains(t, logs.String(), strconv.FormatInt(telegramTestOwner, 10))
 649 }
 650
 651 func TestSplitMessage(t *testing.T) {
 652         testCases := []struct {
 653                 name  string
 654                 text  string
 655                 limit int
 656                 parts []string
 657         }{
 658                 {
 659                         name:  "short text stays whole",
 660                         text:  "one two",
 661                         limit: 10,
 662                         parts: []string{"one two"},
 663                 },
 664                 {
 665                         name:  "cut after the last line break",
 666                         text:  "first line\nsecond line",
 667                         limit: 16,
 668                         parts: []string{"first line\n", "second line"},
 669                 },
 670                 {
 671                         name:  "cut after the last space without a line break",
 672                         text:  "aaaa bbbb cccc",
 673                         limit: 12,
 674                         parts: []string{"aaaa bbbb ", "cccc"},
 675                 },
 676                 {
 677                         name:  "hard cut of one long word",
 678                         text:  "abcdefghij",
 679                         limit: 4,
 680                         parts: []string{"abcd", "efgh", "ij"},
 681                 },
 682                 {
 683                         name:  "a character outside the BMP counts two units and is not cut",
 684                         text:  "ab\U0001F600cd",
 685                         limit: 3,
 686                         parts: []string{"ab", "\U0001F600c", "d"},
 687                 },
 688         }
 689
 690         for _, tc := range testCases {
 691                 t.Run(tc.name, func(t *testing.T) {
 692                         require.Equal(t, tc.parts, telegramSplitMessage(tc.text, tc.limit))
 693                 })
 694         }
 695
 696         long := strings.Repeat("word ", 2000)
 697         parts := telegramSplitMessage(long, telegramMessageUnits)
 698         require.Len(t, parts, 3)
 699         require.Equal(t, long, strings.Join(parts, ""))
 700 }
 701
 702 func TestSplitEntitiesCutsAnEntityAcrossASplit(t *testing.T) {
 703         parts := telegramSplitEntities("aabbbbcc", []TelegramEntity{
 704                 {
 705                         Type:   "bold",
 706                         Offset: 2,
 707                         Length: 4,
 708                 },
 709                 {
 710                         Type:   "italic",
 711                         Offset: 6,
 712                         Length: 2,
 713                 },
 714         }, 5)
 715
 716         require.Equal(t, []TelegramPart{
 717                 {
 718                         text: "aabbb",
 719                         entities: []TelegramEntity{
 720                                 {
 721                                         Type:   "bold",
 722                                         Offset: 2,
 723                                         Length: 3,
 724                                 },
 725                         },
 726                 },
 727                 {
 728                         text: "bcc",
 729                         entities: []TelegramEntity{
 730                                 {
 731                                         Type:   "bold",
 732                                         Offset: 0,
 733                                         Length: 1,
 734                                 },
 735                                 {
 736                                         Type:   "italic",
 737                                         Offset: 1,
 738                                         Length: 2,
 739                                 },
 740                         },
 741                 },
 742         }, parts)
 743 }
 744
 745 func TestSplitRich(t *testing.T) {
 746         testCases := []struct {
 747                 name     string
 748                 markdown string
 749                 limit    int
 750                 parts    []string
 751         }{
 752                 {
 753                         name:     "short reply stays whole",
 754                         markdown: "| a | b |",
 755                         limit:    100,
 756                         parts:    []string{"| a | b |"},
 757                 },
 758                 {
 759                         name:     "cut after a blank line keeps a table whole",
 760                         markdown: "Intro.\n\n| a | b |\n|---|---|\n| 1 | 2 |\n",
 761                         limit:    30,
 762                         parts:    []string{"Intro.\n\n", "| a | b |\n|---|---|\n| 1 | 2 |\n"},
 763                 },
 764                 {
 765                         name:     "blank line in a code block is not a cut",
 766                         markdown: "Text.\n\n```go\nx\n\ny\n```\n\nEnd.\n",
 767                         limit:    20,
 768                         parts:    []string{"Text.\n\n", "```go\nx\n\ny\n```\n\n", "End.\n"},
 769                 },
 770                 {
 771                         name:     "paragraph with no blank line is cut after a line",
 772                         markdown: "aaa\nbbb\nccc\n",
 773                         limit:    9,
 774                         parts:    []string{"aaa\nbbb\n", "ccc\n"},
 775                 },
 776                 {
 777                         name:     "long code block is closed and opened again",
 778                         markdown: "```sh\none\ntwo\nthree\n```\n",
 779                         limit:    16,
 780                         parts:    []string{"```sh\none\n```\n", "```sh\ntwo\n```\n", "```sh\nthree\n```\n"},
 781                 },
 782                 {
 783                         name:     "long line is cut at the limit and not inside a character",
 784                         markdown: "ab\u00e9cd",
 785                         limit:    3,
 786                         parts:    []string{"ab", "\u00e9c", "d"},
 787                 },
 788                 {
 789                         name:     "long line is not cut inside an entity",
 790                         markdown: "abc&amp;def",
 791                         limit:    6,
 792                         parts:    []string{"abc", "&amp;d", "ef"},
 793                 },
 794         }
 795
 796         for _, tc := range testCases {
 797                 t.Run(tc.name, func(t *testing.T) {
 798                         require.Equal(t, tc.parts, telegramSplitRich(tc.markdown, tc.limit))
 799                 })
 800         }
 801
 802         long := strings.Repeat("A paragraph of the reply.\n\n", 2000)
 803         parts := telegramSplitRich(long, telegramRichBytes)
 804         require.Len(t, parts, 2)
 805         require.Len(t, parts[0], telegramRichBytes-telegramRichBytes%len("A paragraph of the reply.\n\n"))
 806         require.Equal(t, long, strings.Join(parts, ""))
 807 }
 808
 809 func TestLoadBotConfig(t *testing.T) {
 810         testCases := []struct {
 811                 name      string
 812                 content   string
 813                 mode      os.FileMode
 814                 errorText string
 815         }{
 816                 {
 817                         name:    "owner file is read",
 818                         content: `{"token": "` + telegramTestToken + `", "owner": 4242}`,
 819                         mode:    0o600,
 820                 },
 821                 {
 822                         name:      "file that others can read is refused",
 823                         content:   `{"token": "` + telegramTestToken + `", "owner": 4242}`,
 824                         mode:      0o640,
 825                         errorText: "mode must be 0600",
 826                 },
 827                 {
 828                         name:      "token with a path character is refused",
 829                         content:   `{"token": "123:abc/../x", "owner": 4242}`,
 830                         mode:      0o600,
 831                         errorText: "form of a bot token",
 832                 },
 833                 {
 834                         name:      "missing owner is refused",
 835                         content:   `{"token": "` + telegramTestToken + `"}`,
 836                         mode:      0o600,
 837                         errorText: "numeric Telegram user ID",
 838                 },
 839                 {
 840                         name:      "unknown field is refused",
 841                         content:   `{"token": "` + telegramTestToken + `", "owner": 4242, "chat": 1}`,
 842                         mode:      0o600,
 843                         errorText: "not valid JSON",
 844                 },
 845         }
 846
 847         for _, tc := range testCases {
 848                 t.Run(tc.name, func(t *testing.T) {
 849                         dir := t.TempDir()
 850                         path := filepath.Join(dir, telegramConfigFileName)
 851                         require.NoError(t, os.WriteFile(path, []byte(tc.content), tc.mode))
 852                         require.NoError(t, os.Chmod(path, tc.mode))
 853
 854                         config, found, err := loadTelegramConfig(dir)
 855                         if tc.errorText != "" {
 856                                 require.ErrorContains(t, err, tc.errorText)
 857                                 require.NotContains(t, err.Error(), telegramTestToken)
 858
 859                                 return
 860                         }
 861
 862                         require.NoError(t, err)
 863                         require.True(t, found)
 864                         require.Equal(t, TelegramConfig{
 865                                 Token: telegramTestToken,
 866                                 Owner: telegramTestOwner,
 867                         }, config)
 868                 })
 869         }
 870
 871         _, found, err := loadTelegramConfig(t.TempDir())
 872         require.NoError(t, err)
 873         require.False(t, found)
 874 }
 875
 876 // telegramStartTestBot returns a bot of telegramTestOwner on server, with its
 877 // offset file in a temporary directory and short waits, and the buffer of its
 878 // log.
 879 func telegramStartTestBot(t *testing.T, server *TelegramFake) (*TelegramBot, *SyncBuffer) {
 880         t.Helper()
 881
 882         logs := &SyncBuffer{}
 883         bot := newTelegramBot(newTelegramAPI(server.URL, telegramTestToken), telegramTestOwner, filepath.Join(t.TempDir(), telegramOffsetFileName), log.New(logs, "", 0))
 884         bot.minWait = time.Millisecond
 885         bot.maxWait = 10 * time.Millisecond
 886
 887         return bot, logs
 888 }
 889
 890 // telegramWaitForSent waits until the bot sent the texts in order, and returns
 891 // them.
 892 func telegramWaitForSent(t *testing.T, server *TelegramFake, texts ...string) []string {
 893         t.Helper()
 894
 895         require.Eventually(t, func() bool {
 896                 sent := server.Sent()
 897                 return len(sent) >= len(texts) && slices.Equal(sent[len(sent)-len(texts):], texts)
 898         }, 10*time.Second, time.Millisecond, "sent so far: %q", server.Sent())
 899
 900         return server.Sent()
 901 }