By default, JMock’s “context” is not thread safe. All bets are off if you access the
Mockery from multiple threads. Happily, since JMock 2.6.0, you can set a threading policy per mockery.
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Synchroniser forces serialisation of each mocked method call using
synchronized. Use it when you’re running multi-threaded style tests using JMock. The default behaviour will warn you if a mockery is being used like this.
the Mockery is not thread-safe: use a Synchroniser to ensure thread safety