Unit testing | Mocking FileOutputStream using Mockk.io I need to test three things from the below mentioned method: verify output.write(any()) is called verify output.close() is called assert that fullPath is returned fun saveFile(fullPath: String, model: SomeDataModel): String? { try { val output = FileOutputStream(fullPath) output.write(Base64.decode(model.someString, Base64.DEFAULT)) output.close() } catch (e: IOException) { return null } return fullPath } Facing...