I’m having trouble mocking `ActivityInfo.exported`...

# android

[Ellen Spertus]

I’m having trouble mocking ActivityInfo.exported with Mockito. Here’s the relevant part of my code:

private fun makeResolveInfo(appName: String, packageName: String, exported: Boolean = true) : ResolveInfo {
    val activityInfo = mock(ActivityInfo::class.java)
    `when`(activityInfo.exported).thenReturn(exported)
    // code omitted
}

The error is:

org.mockito.exceptions.misusing.MissingMethodInvocationException: 
when() requires an argument which has to be 'a method call on a mock'.
For example:
    when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
   Those methods *cannot* be stubbed/verified.
   Mocking methods declared on non-public parent classes is not supported.
2. inside when() you don't call method on mock but on some other object.

Here is the javadoc for the exported getter (which is in ComponentInfo, which ActivityInfo extends): https://developer.android.com/reference/android/content/pm/ComponentInfo#exported

[mattinger]

Have you tried mockito-kotlin library? I've found it handles kotlin code infinitely better than straight up mockito. In addition, they use whenever instead of having to escape when

[Ellen Spertus]

Thanks, @mattinger! I’d been wondering just today if there was a way of avoiding escaping when.

[mattinger]

escaping when isn't hard to do to be honest, you can just make a top level function for the syntax above, or an extension function to OngoingStubbing for the doXXX().when() type syntax

[mattinger]

it's just not necessary if you use mockito-kotlin as it already contains all that along with other kotlin goodies such as a proper re-ified any() function

[Ellen Spertus]

@mattinger I checked with my employer (Mozilla), and they’ve been switching to MockK, so I’ll probably do that. https://mockk.io/

[Ellen Spertus]

(I’m the only Android programmer on my team, which is why I ask most of my questions here, rather than on the work Slack.)

[mattinger]

that would be a huge undertaking for us. We're heavily vested in things like mockito and dagger mock. not even sure if dagger mock supports mockk

[Ellen Spertus]

@mattinger May I ask where you work?

[mattinger]

Comcast

[Ellen Spertus]

@mattinger Thanks for keeping Internet access up.