Adding new tests using unit test module

Music/Downloader.py

@@ -57,6 +57,9 @@ class Downloader():
 
     @run_async
     def extract_info(self, url: str) -> List[dict]:
+        if url == '':
+            return []
+
         if Utils.is_url(url):  # If Url
             options = Downloader.__YDL_OPTIONS_EXTRACT
             with YoutubeDL(options) as ydl:

Music/Song.py

@@ -11,7 +11,7 @@ class Song:
             self.destroy()
             return None
 
-        self.__usefull_keys = ['duration',
+        self.__useful_keys = ['duration',
                               'title', 'webpage_url',
                               'channel', 'id', 'uploader',
                               'thumbnail', 'original_url']
@@ -24,7 +24,7 @@ class Song:
                 print(f'DEVELOPER NOTE -> {key} not found in info of music: {self.identifier}')
                 self.destroy()
 
-        for key in self.__usefull_keys:
+        for key in self.__useful_keys:
             if key in info.keys():
                 self.__info[key] = info[key]
 

Tests/TestsDownload.py

@@ -0,0 +1,59 @@
+import asyncio
+from typing import List
+import unittest
+from Music.Downloader import Downloader
+from Music.Playlist import Playlist
+from Music.Song import Song
+from Tests.TestsHelper import TestsConstants
+
+
+def myAsyncTest(coro):
+    def wrapper(*args, **kwargs):
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(None)
+        try:
+            return loop.run_until_complete(coro(*args, **kwargs))
+        finally:
+            loop.close()
+    return wrapper
+
+
+class TestDownloader(unittest.IsolatedAsyncioTestCase):
+    def __init__(self, methodName: str = ...) -> None:
+        self.downloader = Downloader()
+        self.constants = TestsConstants()
+        super().__init__(methodName)
+
+    @myAsyncTest
+    async def test_emptyString(self):
+        musicsList = await self.downloader.extract_info('')
+
+        self.assertEqual(musicsList, [], self.constants.EMPTY_STRING_ERROR_MSG)
+
+    @myAsyncTest
+    async def test_YoutubeMusicUrl(self) -> None:
+        musicInfo = await self.downloader.extract_info(self.constants.YOUTUBE_MUSIC_URL)
+
+        self.assertTrue(self.__infoExtractedSuccessfully(musicInfo))
+
+    def test_musicTitle(self):
+        playlist = Playlist()
+        song = Song(self.constants.MUSIC_TITLE_STRING, playlist, '')
+        playlist.add_song(song)
+
+        self.downloader.finish_one_song(song)
+        self.assertFalse(song.problematic)
+
+    def __downloadSucceeded(self, downloadReturn: List[dict]) -> bool:
+        # print(downloadReturn)
+        return True
+
+    def __infoExtractedSuccessfully(self, info: List[dict]) -> bool:
+        if len(info) > 0:
+            return True
+        else:
+            return False
+
+
+if __name__ == 'main':
+    unittest.main()

Tests/TestsHelper.py

@@ -0,0 +1,10 @@
+from Config.Configs import Singleton
+
+
+class TestsConstants(Singleton):
+    def __init__(self) -> None:
+        if not super().created:
+            self.EMPTY_STRING_ERROR_MSG = 'Downloader with Empty String should be empty list.'
+            self.SPOTIFY_TRACK_URL = 'https://open.spotify.com/track/7wpnz7hje4FbnjZuWQtJHP'
+            self.MUSIC_TITLE_STRING = 'Experience || AMV || Anime Mix'
+            self.YOUTUBE_MUSIC_URL = 'https://www.youtube.com/watch?v=MvJoiv842mk'