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/tdsync/reset_ready_test.go

@@ -0,0 +1,109 @@
+package tdsync
+
+import (
+	"sync"
+	"testing"
+)
+
+func TestResetReady(t *testing.T) {
+	t.Run("Ready", func(t *testing.T) {
+		r := NewResetReady()
+
+		wait := make(chan struct{})
+		wg := &sync.WaitGroup{}
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			<-r.Ready()
+			<-r.Ready()
+			close(wait)
+		}()
+
+		// Check that Ready can be called multiple times
+		// from different threads.
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			<-r.Ready()
+			<-r.Ready()
+		}()
+
+		// Check that Signal can be called multiple times
+		// from different threads.
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			<-wait
+			r.Signal()
+		}()
+
+		// Check Signal call logic.
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			r.Signal()
+			r.Signal()
+			<-wait
+		}()
+
+		wg.Wait()
+	})
+
+	checkNoSignal := func(t *testing.T, r *ResetReady) {
+		select {
+		case <-r.Ready():
+			t.Error("unexpected signal")
+		default:
+		}
+	}
+
+	t.Run("Reset", func(t *testing.T) {
+		t.Run("Zero", func(t *testing.T) {
+			r := NewResetReady()
+			checkNoSignal(t, r)
+
+			acquire := make(chan struct{})
+			release := make(chan struct{})
+			go func() {
+				close(acquire)
+				<-r.Ready()
+				close(release)
+			}()
+
+			<-acquire
+			r.Reset()
+			<-release
+			checkNoSignal(t, r)
+		})
+
+		t.Run("NoSignal", func(t *testing.T) {
+			r := NewResetReady()
+			checkNoSignal(t, r)
+			r.Reset()
+			checkNoSignal(t, r)
+		})
+
+		t.Run("Signal", func(t *testing.T) {
+			r := NewResetReady()
+
+			wait := make(chan struct{})
+			wg := &sync.WaitGroup{}
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				<-r.Ready()
+				close(wait)
+			}()
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				r.Signal()
+				<-wait
+			}()
+
+			wg.Wait()
+			r.Reset()
+			checkNoSignal(t, r)
+		})
+	})
+}