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How to mock final class with Mockito 2 on Java module in Android project?

I have Android Pure Architecture Project write in Kotlin 3 modules:

  • data (android library)
  • domaine (Java library)
  • presentation (Android application)

Each of the 3 modules has unit tests written with junit . But with Kotlin, every class is final by default. I quickly had a problem: How to mock the final class with mockito

You can now use Mockito 2

This can be done using the mockito extension engine by creating a file /mockito-extensions/org.mockito.plugins.MockMaker

containing one line:

mock-maker-inline

This solution works very well on data module (Android Library) and presentation module (Android app) , but does not work on my domaine module (Java library) .

I know this question has already been asked ( How to mock the latest class with mockito , Mock objects calling final classes static methods with Mockito ), but I didn't find the answer I'm looking for.

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By default, you can use the built-in mock method by changing the Gradle dependency from the regular Mockito dependency:

compile "org.mockito:mockito-core:$mockito_version"

... to the next:



compile "org.mockito:mockito-inline:$mockito_version"

That way, you don't have to rely on the inline mocking activation of the file-in-assets-folder method, which I sometimes found to be broken sometimes.

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Mockito MockMaker can only be used for unit tests (runs on JVM). For those having trouble with mocking Kotlin classes in instrumental tests (androidTest), try using the DexOpener library . This makes Kotlin classes, properties and methods open

, which allows them to be mocked.



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