Add post_hooks option to YoutubeDL.py (https://github.com/ytdl-org/youtube-dl/pull/27573)

Authored by: alexmerkel

test/test_post_hooks.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+
+from __future__ import unicode_literals
+
+import os
+import sys
+import unittest
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from test.helper import get_params, try_rm
+import youtube_dl.YoutubeDL
+from youtube_dl.utils import DownloadError
+
+
+class YoutubeDL(youtube_dl.YoutubeDL):
+    def __init__(self, *args, **kwargs):
+        super(YoutubeDL, self).__init__(*args, **kwargs)
+        self.to_stderr = self.to_screen
+
+
+TEST_ID = 'gr51aVj-mLg'
+EXPECTED_NAME = 'gr51aVj-mLg'
+
+
+class TestPostHooks(unittest.TestCase):
+    def setUp(self):
+        self.stored_name_1 = None
+        self.stored_name_2 = None
+        self.params = get_params({
+            'skip_download': False,
+            'writeinfojson': False,
+            'quiet': True,
+            'verbose': False,
+            'cachedir': False,
+        })
+        self.files = []
+
+    def test_post_hooks(self):
+        self.params['post_hooks'] = [self.hook_one, self.hook_two]
+        ydl = YoutubeDL(self.params)
+        ydl.download([TEST_ID])
+        self.assertEqual(self.stored_name_1, EXPECTED_NAME, 'Not the expected name from hook 1')
+        self.assertEqual(self.stored_name_2, EXPECTED_NAME, 'Not the expected name from hook 2')
+
+    def test_post_hook_exception(self):
+        self.params['post_hooks'] = [self.hook_three]
+        ydl = YoutubeDL(self.params)
+        self.assertRaises(DownloadError, ydl.download, [TEST_ID])
+
+    def hook_one(self, filename):
+        self.stored_name_1, _ = os.path.splitext(os.path.basename(filename))
+        self.files.append(filename)
+
+    def hook_two(self, filename):
+        self.stored_name_2, _ = os.path.splitext(os.path.basename(filename))
+        self.files.append(filename)
+
+    def hook_three(self, filename):
+        self.files.append(filename)
+        raise Exception('Test exception for \'%s\'' % filename)
+
+    def tearDown(self):
+        for f in self.files:
+            try_rm(f)
+
+
+if __name__ == '__main__':
+    unittest.main()