# MediaRouterTestHelper

Artifact: [androidx.mediarouter:mediarouter-testing](https://developer.android.com/jetpack/androidx/releases/mediarouter) [View Source](https://cs.android.com/search?q=file:androidx/mediarouter/testing/MediaRouterTestHelper.java+class:androidx.mediarouter.testing.MediaRouterTestHelper) Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/mediarouter#1.3.0)

*** ** * ** ***


```
public class MediaRouterTestHelper
```

<br />

*** ** * ** ***

A helper class for testing usages of `https://developer.android.com/reference/androidx/mediarouter/media/MediaRouter`.

## Summary

| ### Public methods |
|---|---|
| `static void` | `@https://developer.android.com/reference/androidx/annotation/MainThread https://developer.android.com/reference/androidx/mediarouter/testing/MediaRouterTestHelper#resetMediaRouter()()` Resets all internal state of `https://developer.android.com/reference/androidx/mediarouter/media/MediaRouter` for testing. |

## Public methods

### resetMediaRouter

Added in [1.3.0](https://developer.android.com/jetpack/androidx/releases/mediarouter#1.3.0)

```
@MainThread
public static void resetMediaRouter()
```

Resets all internal state of `https://developer.android.com/reference/androidx/mediarouter/media/MediaRouter` for testing. Should be only used for testing purpose.

After calling this method, the caller should stop using the existing media router instances. Instead, the caller should create a new media router instance again by calling `https://developer.android.com/reference/androidx/mediarouter/media/MediaRouter#getInstance(android.content.Context)`.

Note that the following classes' instances need to be recreated after calling this method, as these classes store the media router instance on their constructor:

- `https://developer.android.com/reference/androidx/mediarouter/app/MediaRouteActionProvider`
- `https://developer.android.com/reference/androidx/mediarouter/app/MediaRouteButton`
- `https://developer.android.com/reference/androidx/mediarouter/app/MediaRouteChooserDialog`
- `https://developer.android.com/reference/androidx/mediarouter/app/MediaRouteControllerDialog`
- `https://developer.android.com/reference/androidx/mediarouter/app/MediaRouteDiscoveryFragment`
Please make sure this is called in the main thread.