---
title: "StateRestorationTester"
description: "Helps to test the state restoration for your Composable component.

Instead of calling [ComposeUiTest.setContent] you need to use [setContent] on this object, then
change your state so there is some change to be restored, then execute [emulateSaveAndRestore]
and assert your state is restored properly.

Note that this only tests the restoration of the local state of the composable you passed to
[setContent] and it is useful for testing uses of
[rememberSaveable][androidx.compose.runtime.saveable.rememberSaveable]. It is not testing the
integration with app and/or platform specific lifecycles."
type: "class"
---

<div class='type'>Class</div>


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>


```kotlin
@ExperimentalTestApi
class StateRestorationTester(private val composeTest: ComposeUiTest)
```


Helps to test the state restoration for your Composable component.

Instead of calling `ComposeUiTest.setContent` you need to use `setContent` on this object, then
change your state so there is some change to be restored, then execute `emulateSaveAndRestore`
and assert your state is restored properly.

Note that this only tests the restoration of the local state of the composable you passed to
`setContent` and it is useful for testing uses of
`rememberSaveable`. It is not testing the
integration with app and/or platform specific lifecycles.


## Functions

```kotlin
fun setContent(composable: @Composable () -> Unit)
```


This functions is a direct replacement for `ComposeUiTest.setContent` if you are going to use
`emulateSaveAndRestore` in the test.


```kotlin
fun emulateSaveAndRestore()
```


Emulates a save and restore cycle of the current composition. First all state that is
remembered with `rememberSaveable` is
stored, then the current composition is disposed, and finally the composition is composed
again. This allows you to test how your component behaves when state restoration is
happening. Note that state stored via `remember` will be lost.