[utils] Allow None in remove_{start,end}

[youtube-dl] / test / test_utils.py

diff --git a/test/test_utils.py b/test/test_utils.py
index 26f66bff644589d04381339260aa64718d9390d4..a697232a8b8da8b45ca54338338a1c67dbf8977d 100644 (file)
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -50,6 +50,8 @@ from youtube_dl.utils import (
     sanitize_path,
     prepend_extension,
     replace_extension,
+    remove_start,
+    remove_end,
     remove_quotes,
     shell_quote,
     smuggle_url,
@@ -215,6 +217,16 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(replace_extension('.abc', 'temp'), '.abc.temp')
         self.assertEqual(replace_extension('.abc.ext', 'temp'), '.abc.temp')
 
+    def test_remove_start(self):
+        self.assertEqual(remove_start(None, 'A - '), None)
+        self.assertEqual(remove_start('A - B', 'A - '), 'B')
+        self.assertEqual(remove_start('B - A', 'A - '), 'B - A')
+
+    def test_remove_end(self):
+        self.assertEqual(remove_end(None, ' - B'), None)
+        self.assertEqual(remove_end('A - B', ' - B'), 'A')
+        self.assertEqual(remove_end('B - A', ' - B'), 'B - A')
+
     def test_remove_quotes(self):
         self.assertEqual(remove_quotes(None), None)
         self.assertEqual(remove_quotes('"'), '"')
@@ -670,7 +682,6 @@ class TestUtil(unittest.TestCase):
         on = js_to_json('{42:42}')
         self.assertEqual(json.loads(on), {'42': 42})
 
-
     def test_extract_attributes(self):
         self.assertEqual(extract_attributes('<e x="y">'), {'x': 'y'})
         self.assertEqual(extract_attributes("<e x='y'>"), {'x': 'y'})