我在控制器中使用服务。我正在为控制器编写单元测试,但我无法在控制器中实例化服务。它总是null
。
如果我在Controller测试类中使用new
运算符实例化服务。服务类中的服务未实例化。
如何在测试类中实例化服务?
答案 0 :(得分:7)
你可以让Spring为你做。
依赖于服务的控制器:
// grails-app/controllers/demo/DemoController.groovy
package demo
class DemoController {
def helperService
def index() {
def answer = helperService.theAnswer
render "The answer is ${answer}"
}
}
服务:
// grails-app/services/demo/HelperService.groovy
package demo
class HelperService {
def getTheAnswer() {
42
}
}
注入服务的单元测试:
// src/test/groovy/demo/DemoControllerSpec.groovy
package demo
import grails.test.mixin.TestFor
import spock.lang.Specification
@TestFor(DemoController)
class DemoControllerSpec extends Specification {
static doWithSpring = {
helperService HelperService
}
void "test service injection"() {
when:
controller.index()
then:
response.text == 'The answer is 42'
}
}
单元测试,注入虚假版本的服务:
// src/test/groovy/demo/AnotherDemoControllerSpec.groovy
package demo
import grails.test.mixin.TestFor
import spock.lang.Specification
@TestFor(DemoController)
class AnotherDemoControllerSpec extends Specification {
static doWithSpring = {
helperService DummyHelper
}
void "test service injection"() {
when:
controller.index()
then:
response.text == 'The answer is 2112'
}
}
class DummyHelper {
def getTheAnswer() {
2112
}
}