test for proxy install

pytube/cipher.py

@@ -274,7 +274,11 @@ def get_signature(js: str, ciphered_signature: str) -> str:
         name, argument = parse_function(js_func)
         signature = transform_map[name](signature, argument)
         logger.debug(
-            "applied transform function\noutput: %s\njs_function: %s\nargument: %d\nfunction: %s",
+            "applied transform function\n"
+            "output: %s\n"
+            "js_function: %s\n"
+            "argument: %d\n"
+            "function: %s",
             "".join(signature),
             name,
             argument,

tests/test_main.py

@@ -10,3 +10,10 @@ def test_prefetch_deferred(MockYouTube):
     instance.prefetch_descramble.return_value = None
     YouTube("https://www.youtube.com/watch?v=9bZkp7q19f0", True)
     assert not instance.prefetch_descramble.called
+
+
+@mock.patch("urllib.request.install_opener")
+def test_install_proxy(opener):
+    proxies = {'http': 'http://www.example.com:3128/'}
+    YouTube("https://www.youtube.com/watch?v=9bZkp7q19f0", defer_prefetch_init=True, proxies=proxies)
+    opener.assert_called()

tests/test_streams.py

@@ -125,23 +125,27 @@ def test_thumbnail_when_not_in_details(cipher_signature):
 
 def test_repr_for_audio_streams(cipher_signature):
     stream = str(cipher_signature.streams.filter(only_audio=True).first())
-    expected = '<Stream: itag="140" mime_type="audio/mp4" abr="128kbps" acodec="mp4a.40.2" progressive="False" type="audio">'
+    expected = '<Stream: itag="140" mime_type="audio/mp4" abr="128kbps" acodec="mp4a.40.2" ' \
+               'progressive="False" type="audio">'
     assert stream == expected
 
 
 def test_repr_for_video_streams(cipher_signature):
     stream = str(cipher_signature.streams.filter(only_video=True).first())
-    expected = '<Stream: itag="137" mime_type="video/mp4" res="1080p" fps="30fps" vcodec="avc1.640028" progressive="False" type="video">'
+    expected = '<Stream: itag="137" mime_type="video/mp4" res="1080p" fps="30fps" vcodec="avc1.640028" ' \
+               'progressive="False" type="video">'
     assert stream == expected
 
 
 def test_repr_for_progressive_streams(cipher_signature):
     stream = str(cipher_signature.streams.filter(progressive=True).first())
-    expected = '<Stream: itag="18" mime_type="video/mp4" res="360p" fps="30fps" vcodec="avc1.42001E" acodec="mp4a.40.2" progressive="True" type="video">'
+    expected = '<Stream: itag="18" mime_type="video/mp4" res="360p" fps="30fps" vcodec="avc1.42001E" ' \
+               'acodec="mp4a.40.2" progressive="True" type="video">'
     assert stream == expected
 
 
 def test_repr_for_adaptive_streams(cipher_signature):
     stream = str(cipher_signature.streams.filter(adaptive=True).first())
-    expected = '<Stream: itag="137" mime_type="video/mp4" res="1080p" fps="30fps" vcodec="avc1.640028" progressive="False" type="video">'
+    expected = '<Stream: itag="137" mime_type="video/mp4" res="1080p" fps="30fps" vcodec="avc1.640028" ' \
+               'progressive="False" type="video">'
     assert stream == expected