+__test__ = False
+
+if __name__ == '__main__':
+ import warnings
+ from eventlet import tpool
+ g = [False]
+
+ def do():
+ g[0] = True
+
+ with warnings.catch_warnings(record=True) as ws:
+ warnings.simplefilter('always')
+
+ tpool.execute(do)
+
+ assert len(ws) == 1
+ msg = str(ws[0].message)
+ assert 'Zero threads in tpool' in msg
+ assert 'EVENTLET_THREADPOOL_SIZE' in msg
+
+ assert g[0]
+ print('pass')