Mocking and Lists

Mocking

Mocking interfaces is extremely easy in Spock. Simply use the Mock method, as shown in the following example (where Subscriber is an interface):

class APublisher extends Specification {
 def publisher = new Publisher()
 def subscriber = Mock(Subscriber)

Now subscriber is a mocked object. We can implement methods simply using the overloaded operator >> as shown below.

def "can cope with misbehaving subscribers"() {
 subscriber.receive(_) >> { throw new Exception() }

 when:
 publisher.send("event")
 publisher.send("event")

 then:

...