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simple-jbdd/src/test/groovy/PublisherSubscriber.groovy

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/*
* Copyright 2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import spock.lang.Specification
class Publisher {
def subscribers = []
def send(event) {
subscribers.each {
try {
it.receive(event)
} catch (Exception e) {}
}
}
}
interface Subscriber {
def receive(event)
}
class PublisherSpec extends Specification {
def pub = new Publisher()
def sub1 = Mock(Subscriber)
def sub2 = Mock(Subscriber)
def setup() {
pub.subscribers << sub1 << sub2
}
def "delivers events to all subscribers"() {
when:
pub.send("event")
then:
1 * sub1.receive("event")
1 * sub2.receive("event")
}
def "can cope with misbehaving subscribers"() {
sub1.receive(_) >> { throw new Exception() }
when:
pub.send("event1")
pub.send("event2")
then:
1 * sub2.receive("event1")
1 * sub2.receive("event2")
}
}