Compose runtime does not work in Paparazzi/JVM screenshot tests

[sebastian-gallese-speak]

Description

The new Compose runtime path (rememberRiveWorker(), rememberRiveFile(), Rive(...)) does not work in Paparazzi/JVM screenshot tests.

This makes it hard to add screenshot coverage for Compose screens that use Rive. Today we have to replace Rive with placeholders/static stand-ins in Paparazzi instead of rendering the actual animation output.

This seems related to Rive's broader Compose testing support, but different from #444:

• Rive composable causes ComposeNotIdleException in Espresso/Compose UI tests due to infinite withFrameNanos loop #444 = Compose UI test / Espresso idleness once the runtime is already running
• this issue = the runtime fails during initialization in a JVM screenshot-test environment

Minimal repro

@Test
fun riveCompose_screenshot() {
    paparazzi.snapshot {
        MaterialTheme {
            NativeThumbsUpRive(modifier = Modifier.size(96.dp))
        }
    }
}

@Composable
private fun NativeThumbsUpRive(modifier: Modifier = Modifier) {
    val worker = rememberRiveWorker()
    when (val fileResult = rememberRiveFile(RiveFileSource.RawRes.from(R.raw.thumbs_up), worker)) {
        is Result.Success -> {
            Rive(
                file = fileResult.value,
                modifier = modifier,
                playing = true,
            )
        }
        else -> Unit
    }
}

Actual result

The runtime fails to initialize:

app.rive.RiveInitializationException: Failed to create Rive worker
Caused by: java.lang.RuntimeException: Method eglGetDisplay in android.opengl.EGL14 not mocked.
See https://developer.android.com/r/studio-ui/build/not-mocked for details.

at android.opengl.EGL14.eglGetDisplay(EGL14.java)
at app.rive.core.RenderContextGL$Companion.createDisplay(RenderContext.kt:125)
at app.rive.core.RenderContextGL.<init>(RenderContext.kt:105)
at app.rive.core.CommandQueue.<init>(CommandQueue.kt:137)
at app.rive.RememberRiveWorkerKt.createRiveWorker(rememberRiveWorker.kt:157)
at app.rive.RememberRiveWorkerKt.rememberRiveWorker(rememberRiveWorker.kt:57)

Expected result

Either:

1. the Compose runtime should work in Paparazzi/layoutlib/JVM screenshot tests, or
2. this environment should be documented as unsupported

Why this matters

Paparazzi is a common screenshot-test stack for Android Compose UI. Without support for this environment, teams using the new Compose runtime cannot verify actual Rive output in screenshot tests and have to fall back to placeholders or device-only coverage.

Related

• Rive composable causes ComposeNotIdleException in Espresso/Compose UI tests due to infinite withFrameNanos loop #444 — Compose UI test / Espresso idleness with the Compose runtime
• java.lang.UnsatisfiedLinkError: No implementation found for long app.rive.runtime.kotlin.core.FileAssetLoader.constructor #316 — historical test-environment failure on an older runtime path

Versions

• observed on rive-android 11.6.1 and 11.7.0
• Compose runtime path only (rememberRiveWorker() + rememberRiveFile() + Rive(...))