You can mock static "things", such as extension functions, top-level functions and objects using mockkStatic. Let's look at an example on how to mock a top-level function with MockK. If the method being matched is written in Java then.
This is because it can return void and this is not assignable to a non-nullable parameter. If you have a method written in kotlin that does not take a nullable parameter then we cannot match with it using Mockito.any (). Dependencies mockito-core, There are maybe transitive dependencies mockito-kotlin from group 2 (version. I'll first demonstrate a working sample and name some alternative approaches afterwards. Getting matchers to work with Kotlin can be a problem. However, you need to know the name of the underlying class created, which hints that probably this approach should only be used very rarely and with caution. Mockito is an incredible lib to make unit tests really awesome and you can use it in Kotlin testCompile org.mockito:mockito-core:1.+ But It’s not all a bed of roses If you try to mock. Use a mocking framework, such as Mockito, which basically mocks the Android SDK components so that you can use them without any device or emulator, just like. Similar to extension functions, for top-level functions, Kotlin creates a class containing static functions under the hood as well, which in turn can be mocked. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors. It lets you write beautiful tests with a clean & simple API. Indeed io.mockk:mockk supports to mock top-level functions in Kotlin. Mockito has been around since the early days of Android development and eventually became the de-facto mocking library for writing unit tests. Mockito is a mocking framework that tastes really good.
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