[test] Skip source address tests if the address cannot be bound to (#8900)

Fixes https://github.com/yt-dlp/yt-dlp/issues/8890

Authored by: coletdjnz

1 files changed, 6 insertions, 1 deletions

diff --git a/test/helper.py b/test/helper.py
index e5ace8fe2..4aca47025 100644
--- a/test/helper.py
+++ b/test/helper.py
@@ -10,7 +10,7 @@ import types
 import yt_dlp.extractor
 from yt_dlp import YoutubeDL
 from yt_dlp.compat import compat_os_name
-from yt_dlp.utils import preferredencoding, try_call, write_string
+from yt_dlp.utils import preferredencoding, try_call, write_string, find_available_port
 
 if 'pytest' in sys.modules:
     import pytest
@@ -329,3 +329,8 @@ def http_server_port(httpd):
     else:
         sock = httpd.socket
     return sock.getsockname()[1]
+
+
+def verify_address_availability(address):
+    if find_available_port(address) is None:
+        pytest.skip(f'Unable to bind to source address {address} (address may not exist)')