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kotlinlang

I’m trying to test an object that has some Rx stuff during its `onBind`

```disposables.add(dao.subscribeToVehicle(Consumer { updateView() }))```

In writing tests around this object, I’m mocking `dao` using Mockito, which then requires me to stub the `subscribeToVehicle(consumer: Consumer&lt;Boolean&gt;)` so that it doesn’t return `null`. However, when I stub the method call

```Mockito.`when`(dao.subscribeToVehicle(any())).thenReturn(mock(Disposable::class.java))```

Since `any()` returns `null`, it fails at runtime with `java.lang.IllegalStateException: any() must not be null`. Am I doing something wrong? It feels like this isn’t a problem with Spek or Kotlin, but I’ve scoured all the solutions related to this in Java and tangentially related in Kotlin, but nothing seems to fix my problem.

This link looked like it was a solution to my problem, but the solution isn’t working and the only difference is that I’m using Spek: <http://stackoverflow.com/a/30308199/981242>

Any help would be greatly appreciated.