scala - 无法在ScalMock中使用Array参数创建 stub

Question

这是我尝试实现的示例。 stub 始终将null调为零，但是如果我将Array(1L)更改为*，它就可以工作。数组参数似乎有问题。

trait Repo {
    def getState(IDs: Array[Long]): String
}


"test" should "pass" in {
    val repo = stub[Repo]
    (repo.getState _).when(Array(1L)).returns("OK")
    val result = repo.getState(Array(1L))
    assert(result == "OK")
}

Answer 1

看到这篇文章:

Why doesn't Array's == function return true for Array(1,2) == Array(1,2)?

ScalaMock工作正常，但数组相等性会阻止您期望的arg与实际的arg匹配。

例如这有效:

 "test" should "pass" in {
   val repo = stub[Repo]
   val a = Array(1L)
   (repo.getState _).when(a).returns("OK")
   val result = repo.getState(a)
   assert(result == "OK")
 }

但是，还有一种添加自定义匹配器的方法(在 org.scalamock.matchers.ArgThat中定义):

 "test" should "pass" in {
   val repo = stub[Repo]
   (repo.getState _).when(argThat[Array[_]] {
     case Array(1L) => true
     case _ => false
   }).returns("OK")
   val result = repo.getState(Array(1L))
   assert(result == "OK")
 }

更新-混合通配符，文字，argThat的示例:

 trait Repo {
   def getState(foo: String, bar: Int, IDs: Array[Long]): String
 }

 "test" should "pass" in {
   val repo = stub[Repo]
   (repo.getState _).when(*, 42, argThat[Array[_]] {
     case Array(1L) => true
     case _ => false
   }).returns("OK")
   val result = repo.getState("banana", 42, Array(1L))
   assert(result == "OK")
 }