Grails 4.0 控制器测试中的模拟服务方法

Question

我有一个这样的控制器：

class NotificationApiController {
def countService
def getCount() {
def results = countService.getCount()
render results as JSON
}
}

控制器测试是这样的：

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]
}

看起来它总是调用注入在 Closure doWithSpring((中的实际 CountService，而不是我的模拟 countService，但没有 Closure doWithSpring((...的定义，我会得到这个错误

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

4.0 中有关单元测试的文档非常有限，我不确定我应该如何做到这一点。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

您省略了一些可能影响建议的详细信息，但 https://github.com/jeffbrown/chrisjiunittest 的项目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]
}
}

另一种选择：

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]
}
}