Function assert_checkpoints

src/trio/testing/_checkpoints.py:32–49

Use as a context manager to check that the code inside the ``with`` block either exits with an exception or executes at least one :ref:`checkpoint `. Raises: AssertionError: if no checkpoint was executed. Example: Check that :func:`trio.sleep` is a checkpoi

()

def assert_checkpoints() -> AbstractContextManager[None]:
    """Use as a context manager to check that the code inside the ``with``
    block either exits with an exception or executes at least one
    :ref:`checkpoint <checkpoints>`.

    Raises:
      AssertionError: if no checkpoint was executed.

    Example:
      Check that :func:`trio.sleep` is a checkpoint, even if it doesn&#x27;t
      block::

         with trio.testing.assert_checkpoints():
             await trio.sleep(0)

    """
    __tracebackhide__ = True
    return _assert_yields_or_not(True)


def assert_no_checkpoints() -> AbstractContextManager[None]: