Skip unit tests which require optional dependencies (#9031)

If we are lacking an optional dependency, skip the tests that rely on it.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/rest/media/v1/test_url_preview.py b/tests/rest/media/v1/test_url_preview.py

index 83d728b4a4..6968502433 100644
--- a/tests/rest/media/v1/test_url_preview.py
+++ b/tests/rest/media/v1/test_url_preview.py
@@ -26,8 +26,15 @@ from twisted.test.proto_helpers import AccumulatingProtocol
 from tests import unittest
 from tests.server import FakeTransport
 
+try:
+    import lxml
+except ImportError:
+    lxml = None
+
 
 class URLPreviewTests(unittest.HomeserverTestCase):
+    if not lxml:
+        skip = "url preview feature requires lxml"
 
     hijack_auth = True
     user_id = "@test:user"