hi guys, I have a function that looks like below `...

# mockk

[Timur Atakishiev]

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]

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

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

[Mattia Tommasone]

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

[Mattia Tommasone]

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

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

[Timur Atakishiev]

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 is empty

[Timur Atakishiev]

When I am using mock every { storageService.putFile(match{}) }
matcher is working fine, however, in verify section, it is not working. Strange

[Timur Atakishiev]

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?