Add test to cover when unable to replace magics (#2471)

[etc/vim.git] / src / black / handle_ipynb_magics.py

diff --git a/src/black/handle_ipynb_magics.py b/src/black/handle_ipynb_magics.py
index b18f8629136e2af1713a7f2fa72c4be50ea53935..63c8aafe35b70e4d16b7d59f349feeb6f392601a 100644 (file)
--- a/src/black/handle_ipynb_magics.py
+++ b/src/black/handle_ipynb_magics.py
@@ -53,6 +53,7 @@ NON_PYTHON_CELL_MAGICS = frozenset(
         "%%writefile",
     )
 )
+TOKEN_HEX = secrets.token_hex
 
 
 @dataclasses.dataclass(frozen=True)
@@ -188,10 +189,10 @@ def get_token(src: str, magic: str) -> str:
     """
     assert magic
     nbytes = max(len(magic) // 2 - 1, 1)
-    token = secrets.token_hex(nbytes)
+    token = TOKEN_HEX(nbytes)
     counter = 0
-    while token in src:  # pragma: nocover
-        token = secrets.token_hex(nbytes)
+    while token in src:
+        token = TOKEN_HEX(nbytes)
         counter += 1
         if counter > 100:
             raise AssertionError(