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Last updated 2025-05-15 UTC.
[null,null,["Last updated 2025-05-15 UTC."],[],[],null,["# androidx.test.ext.junit.rules\n=============================\n\n*** ** * ** ***\n\n[Kotlin](/reference/kotlin/androidx/test/ext/junit/rules/package-summary \"View this page in Kotlin\") \\|Java\n\nClasses\n-------\n\n|---------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [ActivityScenarioRule](/reference/androidx/test/ext/junit/rules/ActivityScenarioRule) | ActivityScenarioRule launches a given activity before the test starts and closes after the test. |\n| [ActivityScenarioRuleKt](/reference/androidx/test/ext/junit/rules/ActivityScenarioRuleKt) | |\n| [AppComponentFactoryRule](/reference/androidx/test/ext/junit/rules/AppComponentFactoryRule) | JUnit [Rule](https://junit.org/junit4/javadoc/4.12/org/junit/Rule.html) that let you define a [AppComponentFactory](https://developer.android.com/reference/android/app/AppComponentFactory.html) before the tests starts and clean-up the factory after the test. |\n| [DeleteFilesRule](/reference/androidx/test/ext/junit/rules/DeleteFilesRule) | Deletes files recursively in Android storage directories after each test. |"]]
