Kotlin 我们应该在 Effect 和 Either 之间 Select 哪个作为我们业务服务的返回类型

随着箭头1.1的到来.我们有了新的Effect班.

到目前为止，我的业务类返回的目的要么是模拟返回错误或值的效果，例如:

    @Service
    class CreateDepartmentUseCaseImpl(
        private val createDepartmentsDrivenPort: CreateDepartmentsDrivenPort,
        private val getDepartmentByCodeDrivenPort: GetDepartmentByCodeDrivenPort
    ) : CreateDepartmentUseCase {
        override suspend fun execute(param: Department): Either<DomainError, Department> =
            Either.conditionally(getDepartmentByCodeDrivenPort.get(param.code) == null,
                { DepartmentAlreadyExistsError(param.code.value) },
                { createDepartmentsDrivenPort.create(param) })

    }

有了新的Effect，它可以被重构为:

    @Service
    class CreateDepartmentUseCaseImpl(
        private val createDepartmentsDrivenPort: CreateDepartmentsDrivenPort,
        private val getDepartmentByCodeDrivenPort: GetDepartmentByCodeDrivenPort
    ) : CreateDepartmentUseCase {
        override suspend fun execute(param: Department): Effect<DomainError, Department> = effect {
            ensure(getDepartmentByCodeDrivenPort.get(param.code) == null) { DepartmentAlreadyExistsError(param.code.value) }
            createDepartmentsDrivenPort.create(param)
        }
    }

在模拟测试中，更改了:

    @Test
    fun `should create department`() = runTest {
        val dep = createValidDepartment()
        val createDepartmentRequest = CreateDepartmentRequest(dep.code.value, dep.name.value, dep.description.value)
        `when`(createDepartmentsUseCase.execute(dep)).thenReturn(dep.right())

到

    @Test
    fun `should create department`() = runTest {
        val dep: Department = createValidDepartment()
        val createDepartmentRequest = CreateDepartmentRequest(dep.code.value, dep.name.value, dep.description.value)
        `when`(createDepartmentsUseCase.execute(dep)).thenReturn(effect { dep })

问题是，对新的Effect级或Either级业务服务进行建模的最佳方法是什么，为什么？