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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/unittest.mock.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/library/unittest.mock.rst b/Doc/library/unittest.mock.rst index 3cc22fd..c6d0ec9 100644 --- a/Doc/library/unittest.mock.rst +++ b/Doc/library/unittest.mock.rst @@ -1831,6 +1831,9 @@ sentinel the same attribute will always return the same object. The objects returned have a sensible repr so that test failure messages are readable. + The ``sentinel`` attributes don't preserve their identity when they are + :mod:`copied <copy>` or :mod:`pickled <pickle>`. + Sometimes when testing you need to test that a specific object is passed as an argument to another method, or returned. It can be common to create named sentinel objects to test this. :data:`sentinel` provides a convenient way of |