def test_print_task_name():
out = io.StringIO()
task = Mock()
task.__wrapped__ = Mock()
task._coro.__name__ = 'foo'
print_task_name(task, file=out)
assert out.getvalue()
task._coro.__name__ = None
task.__wrapped__ = None
print_task_name(task, file=out)
assert out.getvalue()
