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package botapi

import (

"context"

"testing"

"github.com/gotd/td/bin"

"github.com/gotd/td/tg"

)

// broadcastInvoker returns a mock invoker whose channel resolution yields a

// broadcast channel, so messages addressed to it convert to channel posts.

func broadcastInvoker() *mockInvoker {

inv := newMockInvoker()

inv.handle(tg.ChannelsGetChannelsRequestTypeID, func(*bin.Buffer) (bin.Encoder, error) {

return &tg.MessagesChats{Chats: []tg.ChatClass{

&tg.Channel{ID: 50, AccessHash: 1, Title: "ch", Broadcast: true, Photo: &tg.ChatPhotoEmpty{}},

}}, nil

})

return inv

}

// TestDispatchMessageRouting drives every routing branch of dispatchMessage.

func TestDispatchMessageRouting(t *testing.T) {

b := newMockBot(broadcastInvoker())

ctx := context.Background()

var fired []string

b.OnMessage(func(c *Context) error { fired = append(fired, "message"); return nil })

b.OnEditedMessage(func(c *Context) error { fired = append(fired, "edited"); return nil })

b.OnChannelPost(func(c *Context) error { fired = append(fired, "channel"); return nil })

regular := &tg.Message{ID: 1, Message: "x", PeerID: &tg.PeerUser{UserID: 10}}

regular.SetFromID(&tg.PeerUser{UserID: 10})

e := tg.Entities{}

b.dispatchMessage(ctx, e, regular, false)

b.dispatchMessage(ctx, e, regular, true)

channelMsg := &tg.Message{ID: 2, Message: "x", PeerID: &tg.PeerChannel{ChannelID: 50}}

b.dispatchMessage(ctx, e, channelMsg, false)

b.dispatchMessage(ctx, e, channelMsg, true) // edited channel post (no registrar; exercises the switch)

// A service message converts to nil and routes nothing.

b.dispatchMessage(ctx, e, &tg.MessageService{ID: 3, PeerID: &tg.PeerUser{UserID: 10}}, false)

want := []string{"message", "edited", "channel"}

if len(fired) != len(want) {

t.Fatalf("fired = %v, want %v", fired, want)

}

for i := range want {

if fired[i] != want[i] {

t.Fatalf("fired = %v, want %v", fired, want)

}

}

}

// TestInstallHandlers wires the dispatcher and feeds it a new-message update,

// covering the installHandlers callbacks.

func TestInstallHandlers(t *testing.T) {

b := newMockBot(newMockInvoker())

b.installHandlers()

fired := false

b.OnMessage(func(c *Context) error { fired = true; return nil })

msg := &tg.Message{ID: 1, Message: "hi", PeerID: &tg.PeerUser{UserID: 10}}

msg.SetFromID(&tg.PeerUser{UserID: 10})

if err := b.disp.Handle(context.Background(), &tg.Updates{

Updates: []tg.UpdateClass{&tg.UpdateNewMessage{Message: msg}},

Users: []tg.UserClass{&tg.User{ID: 10, AccessHash: 20}},

}); err != nil {

t.Fatalf("Handle: %v", err)

}

if !fired {

t.Fatal("new-message handler did not fire through the dispatcher")

}

}

// TestPollFromTgQuiz covers the quiz, correct-option and solution branches of

// pollFromTg.

func TestPollFromTgQuiz(t *testing.T) {

poll := &tg.Poll{

ID: 7,

Closed: true,

Quiz: true,

Question: tg.TextWithEntities{Text: "2+2?"},

Answers: []tg.PollAnswerClass{

&tg.PollAnswer{Text: tg.TextWithEntities{Text: "3"}, Option: []byte{0}},

&tg.PollAnswer{Text: tg.TextWithEntities{Text: "4"}, Option: []byte{1}},

},

}

results := &tg.PollResults{

TotalVoters: 5,

Results: []tg.PollAnswerVoters{

{Option: []byte{0}, Voters: 2},

{Option: []byte{1}, Voters: 3, Correct: true},

},

}

results.SetSolution("two plus two")

out := pollFromTg(poll, results)

if out.Type != PollQuiz || !out.IsClosed || out.CorrectOptionID != 1 {

t.Fatalf("poll = %#v", out)

}

if out.Explanation != "two plus two" || out.TotalVoterCount != 5 {

t.Fatalf("poll explanation/total = %#v", out)

}

}

// TestChatPhotoBranches covers the non-upload and private-chat rejection paths

// of SetChatPhoto/DeleteChatPhoto.

func TestChatPhotoBranches(t *testing.T) {

b := newMockBot(newMockInvoker())

ctx := context.Background()

if err := b.SetChatPhoto(ctx, userRef(10, 20), FileID("x")); err == nil {

t.Fatal("SetChatPhoto with non-upload file should fail")

}

if err := b.SetChatPhoto(ctx, userRef(10, 20), FileFromBytes("p.jpg", []byte("img"))); err == nil {

t.Fatal("SetChatPhoto on a private chat should fail")

}

if err := b.DeleteChatPhoto(ctx, userRef(10, 20)); err == nil {

t.Fatal("DeleteChatPhoto on a private chat should fail")

}

}