feat(yandextv): add yandextv schedule api

tests/test_yandextv_api.py

@@ -0,0 +1,26 @@
+import datetime
+
+import pytest
+
+from gallery.painting.yandextv.api import YandexTvApi
+from gallery.painting.yandextv.mock import YANDEXTV_MOCK_DATA
+from gallery.sketch.schedule.model import ChannelId
+
+
+@pytest.fixture(name="yandextv_api", scope="module")
+def yandextv_api_fixture() -> YandexTvApi:
+    class MockSource:
+        async def request(self, endpoint: str):
+            return YANDEXTV_MOCK_DATA.get_html(endpoint.split("/")[1].split("?")[0])
+
+    api = YandexTvApi()
+    api.SOURCE = MockSource()
+    return api
+
+
+async def test_channel(yandextv_api: YandexTvApi):
+    result = await yandextv_api.get_channel_schedule(
+        ChannelId.TEST, datetime.date.today()
+    )
+    assert result is not None
+    assert len(result.values) > 0