---
title: "isIdlingResourceSupported"
description: "Capability query to determine if the current ComposeUiTest implementation supports registering an IdlingResource."
type: "function"
lastmod: "2026-05-20T01:13:53.041731Z"
---
## API Reference

### isIdlingResourceSupported

> Source set: Common

```kotlin
@ExperimentalTestApi
fun ComposeUiTest.isIdlingResourceSupported(): Boolean
```

Capability query to determine if the current [ComposeUiTest](/jetpack-compose/androidx.compose.ui/ui-test/interfaces/ComposeUiTest) implementation supports registering
an [IdlingResource](/jetpack-compose/androidx.compose.ui/ui-test/interfaces/IdlingResource).

While [IdlingResource](/jetpack-compose/androidx.compose.ui/ui-test/interfaces/IdlingResource) is supported on Android and Desktop, currently it is not available on all
targets (such as Web).

#### Returns

| | |
| --- | --- |
|  | true if the implementation supports [IdlingResource](/jetpack-compose/androidx.compose.ui/ui-test/interfaces/IdlingResource) registration, false otherwise. |