unit-testing - Controller 测试中的 Grails 4.0 模拟服务方法

Question

我有一个这样的 Controller :

class NotificationApiController {

    def countService

    def getCount() {
        def results = countService.getCount()

        render results as JSON
    }
}

Controller 测试如下:

Closure doWithSpring() {{ ->
        countService(CountService)
    }}

CountService countService

def setup() {
}

def cleanup() {
}

void "test getCount method"() {
        given:
        def countService = Mock(CountService) {
            1 * getCount(_) >> [count: 2]
        }
        when:
        def y = controller.getCount()

        then:
        y == [count: 2]
    }

看来它总是调用在 Closure doWithSpring() 中注入(inject)的实际 CountService，而不是我的模拟 countService，但没有 Closure doWithSpring() 的定义...，我会收到此错误

Cannot invoke method getCount() on null object
java.lang.NullPointerException: Cannot invoke method getCount() on null object

4.0 中的单元测试文档非常有限，我不确定我应该如何做。我在 Grails 2.3 或 3.3 中看到了一些示例。版本，但它们似乎都不适合我，主要是由于我猜 Spock 和 Mixin 框架的差异。关于如何做到这一点的任何建议？

Answer 1

您省略了一些可能会影响推荐的细节，但项目位于 https://github.com/jeffbrown/chrisjiunittest显示了解决此问题的 1 种方法。

https://github.com/jeffbrown/chrisjiunittest/blob/a59a58e3b6ed6b47e1a8104f3e4d3bdb138abacc/src/test/groovy/chrisjiunittest/NotificationApiControllerSpec.groovy

package chrisjiunittest

import grails.testing.web.controllers.ControllerUnitTest
import spock.lang.Specification

class NotificationApiControllerSpec extends Specification implements ControllerUnitTest<NotificationApiController> {

    void "test something"() {
        setup:
        // whether or not this is the right thing to do
        // depends on some other factors, but this is
        // an example of one approach...
        controller.countService = Mock(CountService) {
            getCount() >> [count: 2]
        }

        when:
        controller.getCount()

        then:
        response.json == [count: 2]
    }
}

另外一个选项:

package chrisjiunittest

import grails.testing.web.controllers.ControllerUnitTest
import spock.lang.Specification

class NotificationApiControllerSpec extends Specification implements ControllerUnitTest<NotificationApiController> {

    Closure doWithSpring() {
        // whether or not this is the right thing to do
        // depends on some other factors, but this is
        // an example of one approach...
        { ->
            countService MockCountService
        }
    }

    void "test something"() {
        when:
        controller.getCount()

        then:
        response.json == [count: 2]
    }
}

class MockCountService {
    Map getCount() {
        [count: 2]
    }
}