我试图在集成测试中模拟对外部服务的调用,该服务用于 grails webflow。该服务不在流或 session 范围内,而是通过依赖注入(inject)添加的,请参阅 here .
我已经设法找到一种方法来通过使用 ExpandoMetaClass 替换它的元类来覆盖服务。这些更改仅在单独运行测试时起作用,如果在此测试之前运行另一个使用相同服务的测试,则元类更改将消失。
覆盖元类的部分:
static {
ExpandoMetaClass someService = new ExpandoMetaClass(Object, false)
someService.invokeMethod = { String name, args ->
def result = 'success'
if(name.equals('accessAnotherSystem')
{
StackTraceUtils.sanitize(new Throwable()).stackTrace.each
{
if(it.methodName.equals('test_method_I_Want_failure_in')
{
result = 'exception'
}
}
return result
}
def validMethod = SomeService.metaClass.getMetaMethod(name, args)
if (validMethod != null)
{
validMethod.invoke(delegate, args)
}
else
{
SomeService.metaClass.invokeMissingMethod(delegate, name, args)
}
}
someService.initialize()
SomeService.metaClass = someService
}
相关问题:How to change a class's metaClass per test
有没有办法保留我对测试的更改,或者有其他方法可以覆盖服务。
最佳答案
如果您想在每个测试方法的测试用例中覆盖服务,有一种更简单的方法。看一个例子:
class SomeControllerSpec extends Specification {
def someService
void "test any external method for success response"() {
given: "Mocked service method"
someService.metaClass.accessAnotherSystem = { arg1, arg2 ->
return "some success response"
}
when: "Any controller method is called which calls this service method"
// Your action which calls that service method
then: "Result will processed coming from mocked method"
// Your code
}
}
您可以对任何服务测试方法执行相同的操作。如果您想模拟您正在为其编写测试用例的同一服务的方法,那么就来吧..
class SomeServiceSpec extends Specification {
def someService
void "test external method call"() {
given: "Mocked service method"
someService.metaClass.methodA = { arg1, arg2 ->
return "some success response"
}
when: "A method is called which invokes the another method"
// Your another service method which call the same method
someService.methodB() // Where methodB() invokes the methodA() internally in your code
then: "Result will processed coming from mocked method"
// Your code
}
}
关于grails - 如何防止服务的元类被覆盖,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27623737/