Spock可以模拟一个Java构造函数 [英] Can Spock Mock a Java constructor
问题描述
pre $ private私人MyConfigurator ,
new OnReconnect(){
@Override
public void command(){。。。}
});
$ b $SolrZkClient来自第三方(Apache)Java库。由于它试图连接到ZooKeeper,我想嘲笑这个单元测试(而不是在内部作为单元测试的一部分运行)。
我的测试毫无困难地到达了构造函数,但是我无法超越那个ctor:
$ $ $
MyConfigurator.staticMethodName('hostName:2181')
then:
// assertions $ p $ def'my test'(){
when:
b $ b}
有没有办法做到这一点?
MyConfigurator
类的实现,以使其更具可测性。例如,您可以添加第二个构造函数和/或静态方法,以允许传递 SolrZkClient
(或基础接口,如果有的话)的实例。然后你可以轻松地通过模拟。 Trying to broaden the appeal of Spock at work and run into this issue. Actually trying to write Unit Tests for a Groovy class, but one that calls out to Java. A static method calls a private constructor. The code looks like:
private MyConfigurator(String zkConnectionString){
solrZkClient = new SolrZkClient(zkConnectionString, 30000, 30000,
new OnReconnect() {
@Override
public void command() { . . . }
});
}
"SolrZkClient" is from third party (Apache) Java library. Since it tries to connect to ZooKeeper, I would like to mock that out for this Unit Test (rather than running one internally as part of the unit test).
My test gets to the constructor without difficulty, but I can't get past that ctor:
def 'my test'() {
when:
MyConfigurator.staticMethodName('hostName:2181')
then:
// assertions
}
Is there anyway to do this?
Since the class under test is written in Groovy, you should be able to mock the constructor call by way of a global Groovy Mock/Stub/Spy (see Mocking Constructors in the Spock Reference Documentation). However, a better solution is to decouple the implementation of the MyConfigurator
class, in order to make it more testable. For example, you could add a second constructor and/or static method that allows to pass an instance of SolrZkClient
(or a base interface, if there is one). Then you can easily pass in a mock.
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