Fix mtsender enqueuer and complete test

client/tests/mtsender_test.py

@@ -4,6 +4,7 @@ import logging
 from pytest import LogCaptureFixture
 from telethon._impl.mtproto.transport.full import Full
 from telethon._impl.mtsender.sender import connect
+from telethon._impl.tl import LAYER, abcs, functions, types
 
 TELEGRAM_TEST_DC_2 = "149.154.167.40:443"
 
@@ -25,7 +26,29 @@ def test_invoke_encrypted_method(caplog: LogCaptureFixture) -> None:
             connect(Full(), TELEGRAM_DEFAULT_TEST_DC), timeout()
         )
 
-        # TODO test enqueuer
-        sender, enqueuer
+        rx = enqueuer.enqueue(
+            functions.invoke_with_layer(
+                layer=LAYER,
+                query=functions.init_connection(
+                    api_id=1,
+                    device_model="Test",
+                    system_version="0.1",
+                    app_version="0.1",
+                    system_lang_code="en",
+                    lang_pack="",
+                    lang_code="",
+                    proxy=None,
+                    params=None,
+                    query=functions.help.get_nearest_dc(),
+                ),
+            )
+        )
+
+        while True:
+            await asyncio.wait_for(sender.step(), timeout=timeout())
+            if rx.done():
+                nearest = abcs.NearestDc.from_bytes(rx.result())
+                assert isinstance(nearest, types.NearestDc)
+                break
 
     asyncio.run(func())