How to write unit tests for ViewModels that have routers

[JamesSedlacek]

Can somebody create an example of how to write a unit test that has a router in it?

[SwiftfulThinking]

@JamesSedlacek What specifically are you trying to test?

[JamesSedlacek]

I just want to write unit tests for ViewModels, but I'm not sure how to handle the router property:
private let router: AnyRouter

[SwiftfulThinking]

Ok, I need to write tests for the routing itself, but you should be able to test your ViewModel independently. AnyRouter is a type-erased Router. So you can make a MockRouter that conforms to Router and then use it for testing purposes.

It would be something like:

struct MockRouter: Router {
    // Router methods
}

// For testing
let router = AnyRouter(object: MockRouter())

[JamesSedlacek]

This makes sense! I'll give it a try, thanks!