hi guys I have a function that looks like below ```interface kotlinlang #mockk

Timur Atakishiev

12/05/2020, 10:42 AM

hi guys, I have a function that looks like below

interface StorageService {
    fun upload(inputStream: InputStream): String
}

class LocalStorageService: StorageService {

    override upload(inputStream: InputStream): String {
        //Some uploading logic
    }
}

I want to verify that the function was called with the following code

verify {
    storageService.putFile(
        inputStream = withArg { assertEquals("Hello, World!".toByteArray(),it.readBytes())}
    )
}

and I got an error, that my inputStreams byteArray is empty, can anyone help me please

Mattia Tommasone

12/06/2020, 9:58 PM

i think what you want to do can be achieved by doing

verify {
    storageService.putFile(match {
        it.readBytes() == "Hello, World!".toByteArray()
    })
}

or, in an even clearer way, by using a slot

val inputStreamSlot = slot<InputStream>()
verify {
    storageService.putFile(capture(inputStreamSlot))
}

assertEquals("Hello, World!".toByteArray(), inputStreamSlot.captured.readBytes())

Timur Atakishiev

12/07/2020, 5:37 AM

Thank you for an answer, but both of the variants are not working. In the first one tells that the bytes of

Hello, World!

and bytes of an inputStream are not equal. Second one(with the

slot

) tells that the

inputStreamSlot.captured.readBytes

When I am using mock

every { storageService.putFile(match{}) }

matcher is working fine, however, in verify section, it is not working. Strange

finally, I do something like

verify {storageService.upload(inputStream = matcher{it.reset and then it.readBytes() contentEquals "Hello, wordl".toByteArray()}

What do you think is it okay variant?