Context manager to allow to run scheduled tasks "synced" during tests. The calls will run just when leaving the "with" statement.

django_q_sync_scheduled_tasks.py

from unittest import mock

class SyncScheduledTasks:
    patch = None
    calls = None

    def __init__(self):
        self.calls = []
        self.patch = None

    def __enter__(self):
        # noinspection PyUnusedLocal
        def schedule(func_name, *args, **kwargs):
            # noinspection PyProtectedMember
            self.calls.append(
                (
                    mock._importer(func_name),
                    args,
                )
            )
        self.patch = mock.patch('django_q.tasks.schedule', new=schedule)
        self.patch.start()

    def __exit__(self, exc_type, exc_val, exc_tb):
        try:
            if not len(self.calls):
                raise AssertionError("'django_q.tasks.schedule' was not called")
            for func, args in self.calls:
                func(*args)
        finally:
            self.patch.stop()