move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/query/photos/iter_test.go

@@ -0,0 +1,84 @@
+package photos
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgmock"
+)
+
+func generatePhotos(count int) []tg.PhotoClass {
+	r := make([]tg.PhotoClass, 0, count)
+
+	for i := 0; i < count; i++ {
+		r = append(r, &tg.Photo{
+			ID:            int64(i + 1),
+			AccessHash:    int64(i + 1),
+			FileReference: []uint8{uint8(i)},
+		})
+	}
+
+	return r
+}
+
+func result(r []tg.PhotoClass, count int) tg.PhotosPhotosClass {
+	return &tg.PhotosPhotosSlice{
+		Photos: r,
+		Count:  count,
+	}
+}
+
+func TestIterator(t *testing.T) {
+	ctx := context.Background()
+	mock := tgmock.NewRequire(t)
+	limit := 10
+	totalRecords := 3 * limit
+	expected := generatePhotos(totalRecords)
+	raw := tg.NewClient(mock)
+
+	mock.ExpectCall(&tg.PhotosGetUserPhotosRequest{
+		UserID: &tg.InputUserSelf{},
+		Offset: 0,
+		Limit:  limit,
+	}).ThenResult(result(expected[0:limit], totalRecords))
+	mock.ExpectCall(&tg.PhotosGetUserPhotosRequest{
+		UserID: &tg.InputUserSelf{},
+		Offset: limit,
+		Limit:  limit,
+	}).ThenResult(result(expected[limit:2*limit], totalRecords))
+	mock.ExpectCall(&tg.PhotosGetUserPhotosRequest{
+		UserID: &tg.InputUserSelf{},
+		Offset: 2 * limit,
+		Limit:  limit,
+	}).ThenResult(result(expected[2*limit:3*limit], totalRecords))
+	mock.ExpectCall(&tg.PhotosGetUserPhotosRequest{
+		UserID: &tg.InputUserSelf{},
+		Offset: 3 * limit,
+		Limit:  limit,
+	}).ThenResult(result(expected[3*limit:], totalRecords))
+
+	iter := NewQueryBuilder(raw).GetUserPhotos(&tg.InputUserSelf{}).BatchSize(10).Iter()
+	i := 0
+	for iter.Next(ctx) {
+		require.Equal(t, expected[i], iter.Value().Photo)
+		i++
+	}
+	require.NoError(t, iter.Err())
+	require.Equal(t, totalRecords, i)
+
+	total, err := iter.Total(ctx)
+	require.NoError(t, err)
+	require.Equal(t, totalRecords, total)
+
+	mock.ExpectCall(&tg.PhotosGetUserPhotosRequest{
+		UserID: &tg.InputUserSelf{},
+		Offset: 0,
+		Limit:  1,
+	}).ThenResult(result(expected[:0], totalRecords))
+	total, err = iter.FetchTotal(ctx)
+	require.NoError(t, err)
+	require.Equal(t, totalRecords, total)
+}