X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/3500e1cda5bef73ddc7eaf79be6c67c918738936..96bd428524763fc443ac1729e7254ccbe872d5ca:/tests/util.py

diff --git a/tests/util.py b/tests/util.py
index 84e98bb..8755111 100644
--- a/tests/util.py
+++ b/tests/util.py
@@ -9,7 +9,7 @@ from typing import Any, Iterator, List, Optional, Tuple
 import black
 from black.debug import DebugVisitor
 from black.mode import TargetVersion
-from black.output import err, out
+from black.output import diff, err, out
 
 THIS_DIR = Path(__file__).parent
 DATA_DIR = THIS_DIR / "data"
@@ -47,6 +47,9 @@ def _assert_format_equal(expected: str, actual: str) -> None:
         except Exception as ve:
             err(str(ve))
 
+    if actual != expected:
+        out(diff(expected, actual, "expected", "actual"))
+
     assert actual == expected