无法在ScalMock中使用Array参数创建存根 [英] Unable to create stub with Array argument in ScalMock

问题描述

这是我尝试实现的示例.存根始终将null调整为空，但是如果我将Array(1L)更改为*，它将起作用.数组参数似乎有问题.

Here is an example of what I try to achieve. Stub always retuns null, but if I change Array(1L) to * it works. It seems there is a problem with array arguments.

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")
}

推荐答案

查看此帖子:

为什么不使用数组==对于Array(1,2)== Array(1,2)，函数返回true吗?

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

ScalaMock is working fine, but Array equality prevents your expected arg from matching your actual arg.

例如可行:

 "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")
 }

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

However there is also a way to add a custom matcher(defined in org.scalamock.matchers.ArgThat):

 "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:

Update - example for mixed wildcards, literals, argThat:

 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")
 }

这篇关于无法在ScalMock中使用Array参数创建存根的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！