1 files changed, 17 insertions, 0 deletions
diff --git a/test/helper.py b/test/helper.py
index 777119ea5..d7bf7a828 100644
--- a/test/helper.py
+++ b/test/helper.py
@@ -5,9 +5,11 @@ import json
 import os.path
 import re
 import types
+import sys
 
 import youtube_dl.extractor
 from youtube_dl import YoutubeDL
+from youtube_dl.utils import preferredencoding
 
 
 def global_setup():
@@ -33,6 +35,21 @@ def try_rm(filename):
             raise
 
 
+def report_warning(message):
+    '''
+    Print the message to stderr, it will be prefixed with 'WARNING:'
+    If stderr is a tty file the 'WARNING:' will be colored
+    '''
+    if sys.stderr.isatty() and os.name != 'nt':
+        _msg_header = u'\033[0;33mWARNING:\033[0m'
+    else:
+        _msg_header = u'WARNING:'
+    output = u'%s %s\n' % (_msg_header, message)
+    if 'b' in getattr(sys.stderr, 'mode', '') or sys.version_info[0] < 3:
+        output = output.encode(preferredencoding())
+    sys.stderr.write(output)
+
+
 class FakeYDL(YoutubeDL):
     def __init__(self, override=None):
         # Different instances of the downloader can't share the same dictionary