]> git.giacomolli.uk - onechat/blobdiff - whatsapp_test.go
Give the WhatsApp group names their own type
[onechat] / whatsapp_test.go
index e0018e5ba2a744d99f6130ed03b269dd366ebfc1..791e3ca9d41e7f80f001478fd51c2bf6f14dd588 100644 (file)
@@ -1,7 +1,11 @@
 package main
 
 import (
+       "crypto/sha256"
+       "encoding/hex"
        "errors"
+       "fmt"
+       "net/http"
        "os"
        "path/filepath"
        "strings"
@@ -10,6 +14,8 @@ import (
 
        "github.com/stretchr/testify/require"
        "go.mau.fi/whatsmeow"
+       "go.mau.fi/whatsmeow/proto/waE2E"
+       "go.mau.fi/whatsmeow/proto/waWeb"
        "go.mau.fi/whatsmeow/types"
        "go.mau.fi/whatsmeow/types/events"
 )
@@ -134,6 +140,14 @@ func TestWhatsAppPairsWithACode(t *testing.T) {
        items <- whatsmeow.QRChannelSuccess
        asking.WaitFor(t, "WhatsApp is linked to +15550001111.")
 
+       // The library connects again after the link with the context of the
+       // connection, so the end of the pairing must not end it.
+       connections := fake.Connections()
+       require.Len(t, connections, 1)
+       require.Never(t, func() bool {
+               return connections[0].Err() != nil
+       }, 200*time.Millisecond, time.Millisecond)
+
        require.Equal(t, []string{whatsappTestNumber}, fake.Phones())
        require.Equal(t, "WhatsApp is linked and not connected yet.", whatsapp.Status())
        require.Equal(t, "[connected to OneChat]\n", other.Output())
@@ -314,7 +328,7 @@ func TestWhatsAppLongDisconnectionGivesOneNotice(t *testing.T) {
        whatsappTestSession(t, dir, true)
        clock := newTestClock()
        whatsapp, fake, _ := whatsappStartTest(t, dir, clock)
-       whatsapp.noticeDelay = 50 * time.Millisecond
+       whatsapp.noticeDelay = 300 * time.Millisecond
        socket, _ := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
        client := terminalStartTestClient(t, socket)
        client.WaitFor(t, "[connected to OneChat]")
@@ -323,7 +337,7 @@ func TestWhatsAppLongDisconnectionGivesOneNotice(t *testing.T) {
        require.True(t, fake.Emit(&events.Connected{}))
        require.True(t, fake.Emit(&events.Disconnected{}))
        require.True(t, fake.Emit(&events.Connected{}))
-       time.Sleep(100 * time.Millisecond)
+       time.Sleep(400 * time.Millisecond)
        require.Equal(t, "[connected to OneChat]\n", client.Output())
 
        clock.now = clock.now.Add(time.Hour)
@@ -331,7 +345,7 @@ func TestWhatsAppLongDisconnectionGivesOneNotice(t *testing.T) {
        require.True(t, fake.Emit(&events.Disconnected{}))
        client.WaitFor(t, "WhatsApp is disconnected since 2026-01-01 13:00. OneChat tries again.\n")
        require.True(t, fake.Emit(&events.Disconnected{}))
-       time.Sleep(100 * time.Millisecond)
+       time.Sleep(400 * time.Millisecond)
 
        require.True(t, fake.Emit(&events.Connected{}))
        client.WaitFor(t, "WhatsApp is connected again.\n")
@@ -467,3 +481,612 @@ func whatsappTestLogTexts(t *testing.T, memory *Memory) []string {
 
        return texts
 }
+
+func TestWhatsAppPrivateBatchStartsATurnWithAnEmptyReply(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       require.NoError(t, whatsapp.device.Contacts.PutContactName(t.Context(), whatsappTestAna, "Ana", "Ana Souza"))
+
+       server := newModelFake(t)
+       server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
+               modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("")}, 100, 0, 5))
+       }
+
+       telegram := newTelegramFake(t)
+       bot, _ := telegramStartTestBot(t, telegram)
+       socket, memory := daemonStartTestWithWhatsApp(t, server, bot, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       client.WaitFor(t, "[connected to OneChat]")
+       <-fake.connects
+
+       // The catch-up holds the batch open until its end, so the two messages
+       // form one batch also on a slow machine.
+       require.True(t, fake.Emit(&events.Connected{}))
+       at := time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC)
+       require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "Are you at home?", at)))
+       require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestOwn, "m2", "Yes", at)))
+       require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
+
+       text := "[WhatsApp] Ana Souza, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n12:00 Ana Souza: Are you at home?\n12:00 You: Yes\n" + whatsappBatchEmptyReply
+       client.WaitFor(t, text+"\n[working]\n[done]\n")
+       require.Equal(t, 1, server.Calls())
+       require.Contains(t, string(server.Call(0).raw), "Are you at home?")
+       require.Equal(t, []string{text}, whatsappTestLogTexts(t, memory))
+       require.Empty(t, telegram.Sent())
+       require.Eventually(t, func() bool {
+               return len(whatsapp.state.Closed()) == 0
+       }, 10*time.Second, time.Millisecond)
+}
+
+func TestWhatsAppGroupTurns(t *testing.T) {
+       testCases := []struct {
+               name    string
+               message func(event *events.Message)
+               line    string
+               turn    bool
+       }{
+               {
+                       name: "plain",
+                       message: func(event *events.Message) {
+                       },
+                       line: "12:00 Bruno Lima: Who brings the cake?",
+               },
+               {
+                       name: "mention",
+                       message: func(event *events.Message) {
+                               event.Message = &waE2E.Message{
+                                       ExtendedTextMessage: &waE2E.ExtendedTextMessage{
+                                               Text: new("@" + whatsappTestLID + " can you bring the cake? Call " + whatsappTestNumber + "."),
+                                               ContextInfo: &waE2E.ContextInfo{
+                                                       MentionedJID: []string{whatsappTestLID + "@lid"},
+                                               },
+                                       },
+                               }
+                       },
+                       line: "12:00 Bruno Lima (mentions you): @you can you bring the cake? Call OWN.",
+                       turn: true,
+               },
+               {
+                       name: "reply",
+                       message: func(event *events.Message) {
+                               event.Message = &waE2E.Message{
+                                       ExtendedTextMessage: &waE2E.ExtendedTextMessage{
+                                               Text: new("Who brings the cake?"),
+                                               ContextInfo: &waE2E.ContextInfo{
+                                                       Participant: new(whatsappTestOwn.String()),
+                                               },
+                                       },
+                               }
+                       },
+                       line: "12:00 Bruno Lima (replies to you): Who brings the cake?",
+                       turn: true,
+               },
+       }
+
+       for _, tc := range testCases {
+               t.Run(tc.name, func(t *testing.T) {
+                       whatsapp, fake := whatsappStartTestLinked(t)
+                       fake.groups = []*types.GroupInfo{
+                               {
+                                       JID: whatsappTestFamily,
+                                       GroupName: types.GroupName{
+                                               Name: "Family",
+                                       },
+                               },
+                       }
+
+                       server := newModelFake(t)
+                       socket, memory := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
+                       client := terminalStartTestClient(t, socket)
+                       client.WaitFor(t, "[connected to OneChat]")
+                       whatsappTestConnect(t, fake)
+
+                       event := whatsappTestMessage(whatsappTestFamily, whatsappTestBruno, "m1", "Who brings the cake?", time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC))
+                       event.Info.PushName = "Bruno Lima"
+                       tc.message(event)
+                       require.True(t, fake.Emit(event))
+
+                       text := "[WhatsApp] Family, group 120363000000000001@g.us, Thursday 2026-01-01\n" + tc.line
+                       if tc.turn {
+                               text += "\n" + whatsappBatchEmptyReply
+                               client.WaitFor(t, "[done]")
+                               require.Equal(t, 1, server.Calls())
+                       } else {
+                               client.WaitFor(t, text)
+                               time.Sleep(100 * time.Millisecond)
+                               require.Zero(t, server.Calls())
+                       }
+
+                       require.Equal(t, text, whatsappTestLogTexts(t, memory)[0])
+               })
+       }
+}
+
+func TestWhatsAppTakesOnlyText(t *testing.T) {
+       at := time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC)
+       testCases := []struct {
+               name   string
+               change func(event *events.Message)
+       }{
+               {
+                       name: "an edit",
+                       change: func(event *events.Message) {
+                               event.IsEdit = true
+                       },
+               },
+               {
+                       name: "old history",
+                       change: func(event *events.Message) {
+                               event.SourceWebMsg = &waWeb.WebMessageInfo{}
+                       },
+               },
+               {
+                       name: "a view-once message",
+                       change: func(event *events.Message) {
+                               event.IsViewOnce = true
+                       },
+               },
+               {
+                       name: "a disappearing message",
+                       change: func(event *events.Message) {
+                               event.IsEphemeral = true
+                       },
+               },
+               {
+                       name: "the chat of the user with itself",
+                       change: func(event *events.Message) {
+                               event.Info.Chat = whatsappTestOwn
+                       },
+               },
+               {
+                       name: "a status broadcast",
+                       change: func(event *events.Message) {
+                               event.Info.Chat = types.StatusBroadcastJID
+                       },
+               },
+               {
+                       name: "a photo with a caption",
+                       change: func(event *events.Message) {
+                               event.Message = &waE2E.Message{
+                                       ImageMessage: &waE2E.ImageMessage{
+                                               Caption: new("look"),
+                                       },
+                               }
+                       },
+               },
+               {
+                       name: "a text of spaces",
+                       change: func(event *events.Message) {
+                               event.Message.Conversation = new("  ")
+                       },
+               },
+       }
+
+       for _, tc := range testCases {
+               t.Run(tc.name, func(t *testing.T) {
+                       whatsapp, _ := whatsappStartTestLinked(t)
+                       event := whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "hi", at)
+                       tc.change(event)
+                       require.True(t, whatsapp.handle(event))
+                       require.NoError(t, whatsapp.state.CloseAll())
+                       require.Empty(t, whatsapp.state.Closed())
+               })
+       }
+}
+
+// whatsappStartTestLinked opens a WhatsApp with a linked device in a temporary
+// directory, with a quiet time of 50 ms for its batches.
+func whatsappStartTestLinked(t *testing.T) (*WhatsApp, *WhatsAppFake) {
+       t.Helper()
+
+       dir := t.TempDir()
+       whatsappTestSession(t, dir, true)
+       whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
+       whatsapp.state.quiet = 50 * time.Millisecond
+
+       return whatsapp, fake
+}
+
+func TestWhatsAppCatchupGivesOneTurn(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       server := newModelFake(t)
+       socket, memory := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       client.WaitFor(t, "[connected to OneChat]")
+       <-fake.connects
+
+       require.True(t, fake.Emit(&events.Connected{}))
+       at := time.Date(2026, 1, 1, 8, 0, 0, 0, time.UTC)
+       for index, event := range []*events.Message{
+               whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m1", "Good morning", at),
+               whatsappTestMessage(whatsappTestBruno, whatsappTestBruno, "m2", "Call me", at.Add(time.Hour)),
+               whatsappTestMessage(whatsappTestAna, whatsappTestAna, "m3", "Are you there?", at.Add(2*time.Hour)),
+       } {
+               event.Info.PushName = []string{"Ana", "Bruno", "Ana"}[index]
+               require.True(t, fake.Emit(event))
+       }
+
+       time.Sleep(100 * time.Millisecond)
+       require.Zero(t, memory.Len())
+
+       require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
+       client.WaitFor(t, "[done]")
+       require.Equal(t, []string{
+               "[WhatsApp] Ana, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n08:00 Ana: Good morning\n" + whatsappBatchEmptyReply,
+               "[WhatsApp] Bruno, private chat 15550003333@s.whatsapp.net, Thursday 2026-01-01\n09:00 Bruno: Call me\n" + whatsappBatchEmptyReply,
+               "[WhatsApp] Ana, private chat 15550002222@s.whatsapp.net, Thursday 2026-01-01\n10:00 Ana: Are you there?\n" + whatsappBatchEmptyReply,
+       }, whatsappTestLogTexts(t, memory)[:3])
+
+       time.Sleep(100 * time.Millisecond)
+       require.Equal(t, 1, server.Calls())
+       for _, text := range []string{"Good morning", "Call me", "Are you there?"} {
+               require.Contains(t, string(server.Call(0).raw), text)
+       }
+}
+
+func TestWhatsAppCatchupEndsAfterItsLimit(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       whatsapp.catchupLimit = 100 * time.Millisecond
+       socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       client.WaitFor(t, "[connected to OneChat]")
+       <-fake.connects
+
+       require.True(t, fake.Emit(&events.Connected{}))
+       require.True(t, fake.Emit(whatsappTestMessage(whatsappTestAna, whatsappTestOwn, "m1", "On my way.", time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC))))
+       client.WaitFor(t, "12:00 You: On my way.")
+       require.Len(t, whatsappTestLogTexts(t, memory), 1)
+}
+
+func TestWhatsAppStateOfTheStateFileWaitForTheCatchup(t *testing.T) {
+       dir := t.TempDir()
+       whatsappTestSession(t, dir, true)
+       before, _, _ := whatsappStartTest(t, dir, newTestClock())
+       _, err := before.state.Add(whatsappTestChat, WhatsAppMessage{
+               ID:     "m1",
+               Sender: "Ana Souza",
+               Time:   time.Date(2026, 1, 1, 12, 0, 0, 0, time.UTC),
+               Text:   "Did you see my message?",
+       }, time.Now().Add(-time.Hour))
+       require.NoError(t, err)
+
+       whatsapp, fake, _ := whatsappStartTest(t, dir, newTestClock())
+       socket, memory := daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       client.WaitFor(t, "[connected to OneChat]")
+       <-fake.connects
+
+       time.Sleep(100 * time.Millisecond)
+       require.Zero(t, memory.Len())
+
+       require.True(t, fake.Emit(&events.Connected{}))
+       require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
+       client.WaitFor(t, "12:00 Ana Souza: Did you see my message?")
+       client.WaitFor(t, "[done]")
+}
+
+// whatsappTestConnect waits for the connection of the daemon and gives it the
+// events of a connection with an empty catch-up.
+func whatsappTestConnect(t *testing.T, fake *WhatsAppFake) {
+       t.Helper()
+
+       <-fake.connects
+       require.True(t, fake.Emit(&events.Connected{}))
+       require.True(t, fake.Emit(&events.OfflineSyncCompleted{}))
+}
+
+func TestWhatsAppFindMatchesNamesWithNoRegardToCaseAndAccents(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       fake.groups = []*types.GroupInfo{
+               {
+                       JID: whatsappTestFamily,
+                       GroupName: types.GroupName{
+                               Name: "Família Souza",
+                       },
+               },
+       }
+
+       whatsappTestContacts(t, whatsapp)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       testCases := []struct {
+               name   string
+               query  string
+               answer string
+       }{
+               {
+                       name:   "no accent finds an accent",
+                       query:  "joao",
+                       answer: "15550004444@s.whatsapp.net | João Silva | contact",
+               },
+               {
+                       name:   "a part of a name finds contacts and groups",
+                       query:  "SOUZA",
+                       answer: "15550002222@s.whatsapp.net | Ana Souza | contact\n120363000000000001@g.us | Família Souza | group",
+               },
+               {
+                       name:   "a business name",
+                       query:  "bakery",
+                       answer: "15550005555@s.whatsapp.net | Corner Bakery | contact",
+               },
+               {
+                       name:   "no match",
+                       query:  "Zed",
+                       answer: "No contact or group has a name with \"Zed\".",
+               },
+       }
+
+       for _, tc := range testCases {
+               t.Run(tc.name, func(t *testing.T) {
+                       answer, err := whatsapp.Find(t.Context(), tc.query)
+                       require.NoError(t, err)
+                       require.Equal(t, tc.answer, answer)
+               })
+       }
+}
+
+func TestWhatsAppFindGivesAtMostTwentyMatches(t *testing.T) {
+       whatsapp, _ := whatsappStartTestLinked(t)
+       for index := range 25 {
+               jid := types.NewJID(fmt.Sprintf("1555001%04d", index), types.DefaultUserServer)
+               require.NoError(t, whatsapp.device.Contacts.PutContactName(t.Context(), jid, "", fmt.Sprintf("Member %02d", index)))
+       }
+
+       answer, err := whatsapp.Find(t.Context(), "member")
+       require.NoError(t, err)
+
+       lines := strings.Split(answer, "\n")
+       require.Len(t, lines, 22)
+       require.Equal(t, "15550010000@s.whatsapp.net | Member 00 | contact", lines[0])
+       require.Equal(t, "5 more: give a longer part of the name.", lines[20])
+       require.Equal(t, "The groups are not in this answer, because WhatsApp is disconnected.", lines[21])
+}
+
+func TestWhatsAppFindBeforeTheNamesArrive(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       answer, err := whatsapp.Find(t.Context(), "ana")
+       require.NoError(t, err)
+       require.Equal(t, whatsappNamesNotReady, answer)
+}
+
+func TestWhatsAppFindWithoutALink(t *testing.T) {
+       whatsapp, _, _ := whatsappStartTest(t, t.TempDir(), newTestClock())
+
+       answer, err := whatsapp.Find(t.Context(), "ana")
+       require.NoError(t, err)
+       require.Equal(t, whatsappNotLinked, answer)
+}
+
+func TestAgentFindsAWhatsAppContact(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       whatsappTestContacts(t, whatsapp)
+       server := newModelFake(t)
+       server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
+               if call.number == 0 {
+                       modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "whatsapp_find", `{"name":"ana"}`)}, 100, 0, 5))
+                       return
+               }
+
+               modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Found Ana.")}, 100, 0, 5))
+       }
+
+       socket, _ := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       whatsappTestConnect(t, fake)
+
+       client.Type("Find Ana on WhatsApp.")
+       client.WaitFor(t, "[result] 15550002222@s.whatsapp.net | Ana Souza | contact\nFound Ana.\n[done]")
+}
+
+func TestSubagentHasNoWhatsAppTools(t *testing.T) {
+       box := &Toolbox{}
+       require.Equal(t, `error: unknown tool "whatsapp_find"`, box.run(t.Context(), "whatsapp_find", `{"name":"ana"}`))
+       require.Equal(t, `error: unknown tool "whatsapp_send"`, box.run(t.Context(), "whatsapp_send", `{"id":"a","chat":"15550002222@s.whatsapp.net","text":"hi"}`))
+}
+
+// whatsappTestContacts puts the contacts of the tests into the session of
+// whatsapp: Ana Souza, Joao Silva with an accent, a business, and the user.
+func whatsappTestContacts(t *testing.T, whatsapp *WhatsApp) {
+       t.Helper()
+
+       contacts := whatsapp.device.Contacts
+       require.NoError(t, contacts.PutContactName(t.Context(), whatsappTestAna, "Ana", "Ana Souza"))
+       require.NoError(t, contacts.PutContactName(t.Context(), types.NewJID("15550004444", types.DefaultUserServer), "João", "João Silva"))
+       _, _, err := contacts.PutBusinessName(t.Context(), types.NewJID("15550005555", types.DefaultUserServer), "Corner Bakery")
+       require.NoError(t, err)
+       require.NoError(t, contacts.PutContactName(t.Context(), whatsappTestOwn, "Me", "Me Souza"))
+}
+
+func TestWhatsAppSendSendsOnceForEachID(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       whatsappTestContacts(t, whatsapp)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       answer, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "The keys are under the mat.")
+       require.NoError(t, err)
+       require.Equal(t, "Sent to Ana Souza at 12:05.", answer)
+
+       answer, err = whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "The keys are under the mat.")
+       require.NoError(t, err)
+       require.Equal(t, "Sent to Ana Souza at 12:05. This is the answer of the first call with this id: nothing was sent again.", answer)
+
+       _, err = whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "Another text.")
+       require.EqualError(t, err, "the id keys belongs to another message: give a new id for each message")
+
+       require.Equal(t, []WhatsAppFakeSend{
+               {
+                       to:   whatsappTestAna.String(),
+                       text: "The keys are under the mat.",
+                       id:   "MSG1",
+               },
+       }, fake.Sent())
+
+       again, err := openWhatsAppState(filepath.Join(whatsapp.dir, whatsappStateFileName), whatsappBatchQuiet, whatsappBatchWindow)
+       require.NoError(t, err)
+
+       record, found := again.Send("keys")
+       require.True(t, found)
+       require.Equal(t, whatsappSent, record.State)
+       require.Equal(t, "MSG1", record.MessageID)
+}
+
+func TestWhatsAppSendToAGroup(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       fake.groups = []*types.GroupInfo{
+               {
+                       JID: whatsappTestFamily,
+                       GroupName: types.GroupName{
+                               Name: "Family",
+                       },
+               },
+       }
+
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       answer, err := whatsapp.Send(t.Context(), "cake", whatsappTestFamily.String(), "I bring the cake.")
+       require.NoError(t, err)
+       require.Equal(t, "Sent to Family at 12:05.", answer)
+}
+
+func TestWhatsAppSendThatFails(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       fake.sendErr = errors.New("server error for " + whatsappTestNumber)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       for range 2 {
+               answer, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "hi")
+               require.NoError(t, err)
+               require.True(t, strings.HasPrefix(answer, "The send failed: server error for OWN."), answer)
+       }
+
+       require.Len(t, fake.Sent(), 1)
+}
+
+func TestWhatsAppSendCutByAStop(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       digest := sha256.Sum256([]byte("hi"))
+       require.NoError(t, whatsapp.state.PutSend(WhatsAppSend{
+               ID:     "keys",
+               Chat:   whatsappTestAna.String(),
+               Digest: hex.EncodeToString(digest[:]),
+               State:  whatsappSending,
+       }))
+
+       answer, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "hi")
+       require.NoError(t, err)
+       require.Contains(t, answer, "its result is unknown")
+       require.Empty(t, fake.Sent())
+}
+
+func TestWhatsAppSendRefuses(t *testing.T) {
+       testCases := []struct {
+               name string
+               id   string
+               chat string
+               text string
+               err  string
+       }{
+               {
+                       name: "no id",
+                       id:   " ",
+                       chat: whatsappTestAna.String(),
+                       text: "hi",
+                       err:  "the id must have 1 to 100 bytes",
+               },
+               {
+                       name: "no text",
+                       id:   "a",
+                       chat: whatsappTestAna.String(),
+                       text: "",
+                       err:  "the text must have 1 to 65536 bytes",
+               },
+               {
+                       name: "a name for a chat",
+                       id:   "a",
+                       chat: "Ana Souza",
+                       text: "hi",
+                       err:  `"Ana Souza" is not the ID of a WhatsApp chat: find the ID with whatsapp_find`,
+               },
+               {
+                       name: "a status broadcast",
+                       id:   "a",
+                       chat: types.StatusBroadcastJID.String(),
+                       text: "hi",
+                       err:  `"status@broadcast" is not a private chat or a group`,
+               },
+               {
+                       name: "the chat of the user",
+                       id:   "a",
+                       chat: whatsappTestOwn.String(),
+                       text: "hi",
+                       err:  "this is the chat of the user with itself: send to another chat",
+               },
+       }
+
+       whatsapp, fake := whatsappStartTestLinked(t)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+
+       for _, tc := range testCases {
+               t.Run(tc.name, func(t *testing.T) {
+                       _, err := whatsapp.Send(t.Context(), tc.id, tc.chat, tc.text)
+                       require.EqualError(t, err, tc.err)
+               })
+       }
+
+       require.Empty(t, fake.Sent())
+}
+
+func TestWhatsAppSendWhileDisconnected(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       daemonStartTestWithWhatsApp(t, newModelFake(t), nil, whatsapp)
+       whatsappTestConnect(t, fake)
+       require.True(t, fake.Emit(&events.Disconnected{}))
+
+       _, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "hi")
+       require.EqualError(t, err, "WhatsApp is disconnected, so nothing was sent: try again later")
+
+       require.True(t, fake.Emit(&events.Connected{}))
+       answer, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "hi")
+       require.NoError(t, err)
+       require.Equal(t, "Sent to +15550002222 at 12:05.", answer)
+}
+
+func TestWhatsAppSendWithoutALink(t *testing.T) {
+       whatsapp, _, _ := whatsappStartTest(t, t.TempDir(), newTestClock())
+
+       answer, err := whatsapp.Send(t.Context(), "keys", whatsappTestAna.String(), "hi")
+       require.NoError(t, err)
+       require.Equal(t, whatsappNotLinked, answer)
+}
+
+func TestAgentSendsAWhatsAppMessage(t *testing.T) {
+       whatsapp, fake := whatsappStartTestLinked(t)
+       whatsappTestContacts(t, whatsapp)
+       server := newModelFake(t)
+       server.reply = func(w http.ResponseWriter, call ModelFakeCall) {
+               if call.number == 0 {
+                       modelWriteEvents(w, modelCompletedEvent([]any{modelFunctionCallItem("fc_1", "call_1", "whatsapp_send", `{"id":"keys","chat":"15550002222@s.whatsapp.net","text":"The keys are under the mat."}`)}, 100, 0, 5))
+                       return
+               }
+
+               modelWriteEvents(w, modelCompletedEvent([]any{modelMessageItem("Sent.")}, 100, 0, 5))
+       }
+
+       socket, _ := daemonStartTestWithWhatsApp(t, server, nil, whatsapp)
+       client := terminalStartTestClient(t, socket)
+       whatsappTestConnect(t, fake)
+
+       client.Type("Tell Ana that the keys are under the mat.")
+       client.WaitFor(t, "[result] Sent to Ana Souza at 12:05.\nSent.\n[done]")
+       require.Len(t, fake.Sent(), 1)
+}