spock - 如何使用Spock测试是否从Grails 3中的另一个实例方法中调用实例方法

Question

使用Grails 3.2.8和Spock框架进行测试，给定以下控制器类：

class SomeController {
    def doSomething() {
        // do a few things, then:
        someOtherMethod()
    }

    protected void someOtherMethod() {
        // do something here, but I don't care
    }
}

如何测试doSomething()方法以确保someOtherMethod()只调用一次？

这是我失败的尝试：

@TestFor(SomeController)
class SomeControllerSpec extends Specification {
    void "Test that someOtherMethod() is called once inside doSomething()"() {
        when:
        controller.doSomething()

        then:
        1 * controller.someOtherMethod(_)
    } 
}

错误信息：

Too few invocations for:

1 * controller.someOtherMethod(_)   (0 invocations)

注意：已省略导入以关注手头的问题

Answer 1

您不能这样做，因为控制器不是模拟对象。相反，您需要像这样使用元类：

@TestFor(SomeController)
class SomeControllerSpec extends Specification {
    void "Test that someOtherMethod() is called once inside doSomething()"() {
        given:
            Integer callsToSomeOtherMethod = 0
            controller.metaClass.someOtherMethod = {
                callsToSomeOtherMethod++
            }
        when:
            controller.doSomething()

        then:
            callsToSomeOtherMethod == 1
    } 
}