From 134f3bcf0d68418dc14904cf165660c0a1d0eaca Mon Sep 17 00:00:00 2001
From: Il`ya Semyonov <Ilya@marshal.by>
Date: Sun, 21 Jun 2020 22:17:41 +0300
Subject: [PATCH] =?UTF-8?q?=D0=92=D1=81=D0=B5=20=D0=BF=D0=BE=D0=BB=D1=8F?=
 =?UTF-8?q?=20=D0=BA=D0=BB=D0=B0=D1=81=D1=81=D0=B0=20MetaData=20=D1=82?=
 =?UTF-8?q?=D0=B5=D0=BF=D0=B5=D1=80=D1=8C=20=D0=BE=D0=BF=D1=86=D0=B8=D0=BE?=
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---
 tests/test_meta_data.py         |  7 +------
 yandex_music/track/meta_data.py | 17 ++++++++---------
 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/tests/test_meta_data.py b/tests/test_meta_data.py
index a39b6ade..73987fac 100644
--- a/tests/test_meta_data.py
+++ b/tests/test_meta_data.py
@@ -19,12 +19,7 @@ def test_de_json_none(self, client):
         assert MetaData.de_json({}, client) is None
 
     def test_de_json_required(self, client):
-        json_dict = {'album': self.album, 'volume': self.volume, 'year': self.year}
-        meta_data = MetaData.de_json(json_dict, client)
-
-        assert meta_data.album == self.album
-        assert meta_data.volume == self.volume
-        assert meta_data.year == self.year
+        MetaData.de_json({}, client)
 
     def test_de_json_all(self, client):
         json_dict = {'album': self.album, 'volume': self.volume, 'year': self.year,
diff --git a/yandex_music/track/meta_data.py b/yandex_music/track/meta_data.py
index 692aaadd..1397c796 100644
--- a/yandex_music/track/meta_data.py
+++ b/yandex_music/track/meta_data.py
@@ -18,9 +18,9 @@ class MetaData(YandexMusicObject):
         client (:obj:`yandex_music.Client`): Клиент Yandex Music.
 
     Args:
-        album (:obj:`str`): Название альбома.
-        volume (:obj:`int`): Диск (раздел).
-        year (:obj:`int`): Год выхода.
+        album (:obj:`str`, optional): Название альбома.
+        volume (:obj:`int`, optional): Диск (раздел).
+        year (:obj:`int`, optional): Год выхода.
         number (:obj:`int`, optional): Позиция в альбоме.
         genre (:obj:`str`, optional): Жанр.
         client (:obj:`yandex_music.Client`, optional): Клиент Yandex Music.
@@ -28,17 +28,16 @@ class MetaData(YandexMusicObject):
     """
 
     def __init__(self,
-                 album: str,
-                 volume: int,
-                 year: int,
-                 number: int = None,
-                 genre: str = None,
+                 album: Optional[str] = None,
+                 volume: Optional[int] = None,
+                 year: Optional[int] = None,
+                 number: Optional[int] = None,
+                 genre: Optional[str] = None,
                  client: Optional['Client'] = None,
                  **kwargs) -> None:
         self.album = album
         self.volume = volume
         self.year = year
-
         self.number = number
         self.genre = genre