X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/44d5da00b520a05cd56e58b3998660f64ea59ebd..e7b967132fdbb9e2e4c4e9916530d238848ab183:/tests/test_blackd.py

diff --git a/tests/test_blackd.py b/tests/test_blackd.py
index 18b2c98..1d12113 100644
--- a/tests/test_blackd.py
+++ b/tests/test_blackd.py
@@ -167,6 +167,13 @@ class BlackDTestCase(AioHTTPTestCase):
         )
         self.assertEqual(response.status, 400)
 
+    @unittest_run_loop
+    async def test_blackd_preview(self) -> None:
+        response = await self.client.post(
+            "/", data=b'print("hello")\n', headers={blackd.PREVIEW: "true"}
+        )
+        self.assertEqual(response.status, 204)
+
     @unittest_run_loop
     async def test_blackd_response_black_version_header(self) -> None:
         response = await self.client.post("/")