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下面的代码是spock测试的一个非常基本的示例。当我运行它,它提供了以下错误无法在spock中的空对象上调用方法leftshift()
Cannot invoke method leftshift() on null object
为什么和如何才能让我的代码工作?
另外,在spock中使用leftshift
和rightshift
究竟是什么。
import spock.lang.*;
class Publisher {
List <Subscriber> subscribers
void send (String message){}
}
interface Subscriber {
void receive(String message)
}
public class Test1 extends Specification {
Publisher publisher = new Publisher()
def subscriber = Mock(Subscriber)
def subscriber2 = Mock(Subscriber)
def setup() {
(publisher.subscribers) << subscriber
(publisher.subscribers) << subscriber2
}
def "should send message to subscriber"() {
when:
publisher.send("hello")
then:
1 * subscriber.receive("hello")
1 * subscriber2.receive("hello")
}
}