Hi all. I'm rendering UI composables conditionally, based on UiState, however, tagging composables a...

# compose-android

[Alexandru Gheorghe]

Hi all. I'm rendering UI composables conditionally, based on UiState, however, tagging composables at the root with testTag doesn't make them findable in instrumentation tests. See error and more details in 🧵

[Alexandru Gheorghe]

Error:

java.lang.AssertionError: Failed: assertExists.
Reason: Expected exactly '1' node but could not find any node that satisfies: (TestTag = 'string')

The composable is passed as content parameter (content: @Composable () -> Unit) to another composable. The code is of the form:

ParentComposable(
    <parameters>,
    content = {
        when (uiState) {
            is UiState.Loading -> {
                LoadingScreen(
                    modifier =
 Modifier.testTag("string")
                )
            }
        }
    }
)

[Alexandru Gheorghe]

LoadingScreen composable fails to be found. I tried the execution of assertion with useUnmergedTree set to true but that fails too.

[Alexandru Gheorghe]

I'm `mockk`ing the UiState (it's stored in the ViewModel) so I'm sure I should be hitting the condition from this point of view. I even see the screen on my device and yet the test fails to find the node. Really at odds here how to fix this.

[Atul Gupta]

you can print the merged and unmerged tree and see where that test tag is coming? If it is coming in the unmerged tree you need to query in by passing the unmerged = true