Mockito matchers, scala value class and NullPointerException

Question

I\'m using mockito with scalatest. I have following problem when using matcher with value class.

import org.scalat         


        

Answer 1

This works for all kinds of extends AnyVal value classes and doesn't need special matchers either:

    given(mockedClass.someMethods(FirstId(anyString), SecondId(org.mockito.Matchers.eq(secondId.value)))).willReturn(3)

Answer 2

The newest version of mockito-scala (0.0.9) supports this out of the box, you can do something like

when(myObj.myMethod(anyVal[MyValueClass]) thenReturn "something"

myObj.myMethod(MyValueClass(456)) shouldBe "something"

verify(myObj).myMethod(eqToVal[MyValueClass](456))

Disclaimer: I'm a developer of that library

Answer 3

The proper solution is:

case class StringValue(val text: String) extends AnyVal
case class LongValue(val value: Long) extends AnyVal

val eqFirst: StringValue = StringValue(org.mockito.Matchers.eq("first"))
val anySecond: StringValue = StringValue(org.mockito.Matchers.any[String])

val eqFirst: LongValue = LongValue(org.mockito.Matchers.eq(1L))
val anySecond: LongValue = LongValue(org.mockito.Matchers.any[Long])

Answer 4

If you have shapeless in your dependencies you could consider my little helper method: https://gist.github.com/Fristi/bbc9d0e04557278f8d19976188a0b733

Instead of writing

UserId(is(context.userId.value))

You can write

isAnyVal(context.userId)

Which is a bit more convenient :-)

Answer 5

I found solution:

val anyFirstId: FirstId = any[String].asInstanceOf[FirstId]
val eqSecondId: SecondId = org.mockito.Matchers.eq[String](secondId.value).asInstanceOf[SecondId]
given(mockedClass.someMethods(anyFirstId, eqSecondId)).willReturn(3)

Answer 6

My class also extended AnyVal

case class ApplicationKey(value: String) extends AnyVal {
  override def toString: String = value
}

and this worked for me:

   when(waterfallLogicEventWriter.writeAuctionEvents(            
     Eq(waterfallRequest.auctionId), Eq(waterfallRequest.ip),
     ApplicationKey(any[String]),                                
     any()).thenReturn(waterfallEvents)