Scala mock，MockFactory 预计会失败'Unexpected call'

Question

我正在尝试遵循此文档 - scalatest scala-mock来模拟函数并检查它是否已被调用

class AggregateSpec extends FlatSpec with Matchers with MockFactory {
 val data = Seq("This", "is", "something", "I", "would", "like", "to", "know")
"combop function" should "BE called for par collection" in {
    val mockCombop = mockFunction[Int, Int, Int]
    val parData = data.par
    val result: Int = parData.aggregate(0)(
      seqop = (acc, next) => acc + next.length,
      combop = mockCombop
    )
    result should === (31)
    mockCombop.expects(*, *).atLeastOnce()
  }
}

结果：

> [info] - should BE called for non-par collection *** FAILED *** [info]
> Unexpected call: MockFunction2-1(4, 2) [info]    [info]   Expected:
> [info]   inAnyOrder { [info]    [info]   } [info]    [info]   Actual:
> [info]     MockFunction2-1(9, 1) [info]     MockFunction2-1(2, 4)
> [info]     MockFunction2-1(4, 2) [info]     MockFunction2-1(5, 4)
> (Option.scala:121)

为什么？如何让它通过 scalatest + scala-mock ？

--

作为部门，我使用：

   libraryDependencies += "org.scalactic" %% "scalactic" % "3.0.1",
    libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.1" % "test",
    libraryDependencies += "org.scalamock" %% "scalamock-scalatest-support" % "3.5.0"

Answer 1

您需要在

调用mockCombop之前调用mockCombop.expects，而不是在以下之后：

"combop function" should "BE called for par collection" in {
  val mockCombop = mockFunction[Int, Int, Int]
  val parData = data.par
  mockCombop.expects(*, *).atLeastOnce()
  val result: Int = parData.aggregate(0)(
    seqop = (acc, next) => acc + next.length,
    combop = mockCombop
  )
  result should === (31)
}