bug(youtube.dl): Fix crash on zero downloads #375

tests/site_downloaders/test_youtube.py

@@ -5,6 +5,7 @@ from unittest.mock import MagicMock
 
 import pytest
 
+from bdfr.exceptions import NotADownloadableLinkError
 from bdfr.resource import Resource
 from bdfr.site_downloaders.youtube import Youtube
 
@@ -15,7 +16,7 @@ from bdfr.site_downloaders.youtube import Youtube
     ('https://www.youtube.com/watch?v=uSm2VDgRIUs', 'f70b704b4b78b9bb5cd032bfc26e4971'),
     ('https://www.youtube.com/watch?v=m-tKnjFwleU', '30314930d853afff8ebc7d8c36a5b833'),
 ))
-def test_find_resources(test_url: str, expected_hash: str):
+def test_find_resources_good(test_url: str, expected_hash: str):
     test_submission = MagicMock()
     test_submission.url = test_url
     downloader = Youtube(test_submission)
@@ -24,3 +25,16 @@ def test_find_resources(test_url: str, expected_hash: str):
     assert isinstance(resources[0], Resource)
     resources[0].download(120)
     assert resources[0].hash.hexdigest() == expected_hash
+
+
+@pytest.mark.online
+@pytest.mark.slow
+@pytest.mark.parametrize(('test_url'), (
+    ('https://www.polygon.com/disney-plus/2020/5/14/21249881/gargoyles-animated-series-disney-plus-greg-weisman-interview-oj-simpson-goliath-chronicles'),
+))
+def test_find_resources_bad(test_url: str):
+    test_submission = MagicMock()
+    test_submission.url = test_url
+    downloader = Youtube(test_submission)
+    with pytest.raises(NotADownloadableLinkError):
+        downloader.find_resources()