Hi Konsist community! :wave: I have recently start...

# konsist

[Ivan Varga]

Hi Konsist community! 👋
I have recently started working with Konsist and loving it!
However, I've stumbled upon one issue I cannot figure out so any help is very much appreciated.

I have a ViewModel defined as:

class MyViewModel(
    private val a: A?,
    backgroundCoroutineScope: BackgroundCoroutineScope,
) : ViewModel(viewModelScope = backgroundCoroutineScope.scope)

and a Unit test with Konsist:

Konsist.scopeFromProject()
            .classes()
            .withParentOf(ViewModel::class)
            .withName { it.equals("MyViewModel", ignoreCase = true) }
            .withPrimaryConstructor()
            .properties()
            .print()

The print statement you see above, prints only a, but not backgroundCoroutineScope.
I assume this is due to the backgroundCoroutineScope not being a var nor a val.
Is there a way I can verify that this constructor property exists?
Thank you 🙏

[Ivan Varga]

Additionally, is there a way to verify that a value from the primary constructor of my class is passed in to the super class constructor?
In this case backgroundCoroutineScope is passed in to the ViewModel constructor.

[Vidmantas Kerbelis]

This would find all of the fields that you need:

Konsist.scopeFromProject()
    .classes()
    .withParentOf(ViewModel::class)
    .withName { it.equals("MyViewModel", ignoreCase = true) }
    .mapNotNull { it.primaryConstructor }
    .forEach {
        println("${it.parameters}")
    }

Result: [a, backgroundCoroutineScope]

[Vidmantas Kerbelis]

For your other question - I did not find a good solution myself, but for my own needs, I just used the raw text field of the declaration and parsed + asserted what I needed using String manipulation.

[Ivan Varga]

Thank you, it works! 🦠
I'll try your other suggestion as well.

[Vidmantas Kerbelis]

But that other suggestion is very cumbersome and unstable 😄
E.g. in this case you'd get this whole line as a String:

) : ViewModel(viewModelScope = backgroundCoroutineScope.scope)

And check appropriately.
Even if you get it working:

) : ViewModel(
    viewModelScope = backgroundCoroutineScope.scope)
)

Such formatting becomes an issue immediately.

[Ivan Varga]

Maybe using a regex would help? 😬
But yeah, I can see this solution being fragile