斯卡拉模擬，MockFactory預計將失敗，並「意外來電」

Question

我試圖按照this doc - scalatest與scala-mock嘲笑功能並檢查它是否已被稱爲

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() 

    } 
} 

至於結果：

> [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) 

爲什麼？如何使它通過scalatest + scala-mock？

-

由於DEPS我用：

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

你需要調用mockCombop.expectsmockCombop之前被調用，而不是之後：

"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) 
}