如何模拟一个 uuid 生成器,它 return 不同的调用有不同的值?

How to mock a uuid generator which return different values for different calls?

我有一个 uuid 生成器,例如:

class NewUuid {
    def apply: String = UUID.randomUUID().toString.replace("-", "")
}

其他class可以使用:

class Dialog {
    val newUuid = new NewUuid
    def newButtons(): Seq[Button] = Seq(new Button(newUuid()), new Button(newUuid()))
}

现在我想测试 Dialog 并模拟 newUuid:

val dialog = new Dialog {
    val newUuid = mock[NewUuid]
    newUuid.apply returns "uuid1"
}
dialog.newButtons().map(_.text) === Seq("uuid1", "uuid1")

您可以看到 returned uuid 始终是 uuid1

是否可以让newUuid到return不同的调用取不同的值?例如第一次调用 returns uuid1,第二次调用 returns uuid2,等等

newUuid.apply returns "uudi1" thenReturns "uuid2"

https://etorreborre.github.io/specs2/guide/SPECS2-3.5/org.specs2.guide.UseMockito.html

使用迭代器生成您的 UUID

def newUuid() = UUID.randomUUID().toString.replace("-", "")

val defaultUuidSource = Iterator continually newUuid()

class Dialog(uuids: Iterator[String] = defaultUuidSource) {
  def newButtons() = Seq(
    Button(uuids.next()),
    Button(uuids.next())
  )
}

然后提供一个不同的测试:

val testUuidSource = Iterator from 1 map {"uuid" + _}
new Dialog(testUuidSource)