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-rw-r--r--src/mailman/testing/helpers.py11
1 files changed, 9 insertions, 2 deletions
diff --git a/src/mailman/testing/helpers.py b/src/mailman/testing/helpers.py
index 71cddd0f4..9f9ea6181 100644
--- a/src/mailman/testing/helpers.py
+++ b/src/mailman/testing/helpers.py
@@ -63,7 +63,7 @@ from mailman.utilities.mailbox import Mailbox
-def make_testable_runner(runner_class, name=None):
+def make_testable_runner(runner_class, name=None, predicate=None):
"""Create a queue runner that runs until its queue is empty.
:param runner_class: The queue runner's class.
@@ -71,6 +71,10 @@ def make_testable_runner(runner_class, name=None):
:param name: Optional queue name; if not given, it is calculated from the
class name.
:type name: string or None
+ :param predicate: Optional alternative predicate for deciding when to stop
+ the queue runner. When None (the default) it stops when the queue is
+ empty.
+ :type predicate: callable that gets one argument, the queue runner.
:return: A runner instance.
"""
@@ -90,7 +94,10 @@ def make_testable_runner(runner_class, name=None):
def _do_periodic(self):
"""Stop when the queue is empty."""
- self._stop = (len(self.switchboard.files) == 0)
+ if predicate is None:
+ self._stop = (len(self.switchboard.files) == 0)
+ else:
+ self._stop = predicate(self)
return EmptyingRunner(name)