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public final class TestNavigationEventDispatcherOwner implements NavigationEventDispatcherOwner
A test implementation of NavigationEventDispatcherOwner for verifying NavigationEventDispatcher interactions.
Use this class in tests to confirm that back-press fallbacks and callback status changes are invoked as expected. It tracks the number of times these events occur via public counters.
Summary
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Last updated 2025-08-27 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-27 UTC."],[],[],null,["# TestNavigationEventDispatcherOwner\n==================================\n\nArtifact: [androidx.navigationevent:navigationevent-testing](/jetpack/androidx/releases/navigationevent) \n[View Source](https://cs.android.com/search?q=file:androidx/navigationevent/testing/TestNavigationDispatcherOwner.kt+class:androidx.navigationevent.testing.TestNavigationEventDispatcherOwner) \nAdded in [1.0.0-alpha06](/jetpack/androidx/releases/navigationevent#1.0.0-alpha06)\n\n*** ** * ** ***\n\n[Kotlin](/reference/kotlin/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner \"View this page in Kotlin\") \\|Java\n\n\n```\npublic final class TestNavigationEventDispatcherOwner implements NavigationEventDispatcherOwner\n```\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nA test implementation of [NavigationEventDispatcherOwner](/reference/androidx/navigationevent/NavigationEventDispatcherOwner) for verifying [NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) interactions.\n\nUse this class in tests to confirm that back-press fallbacks and callback status changes are invoked as expected. It tracks the number of times these events occur via public counters.\n\nSummary\n-------\n\n| ### Public constructors |\n|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [TestNavigationEventDispatcherOwner](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner#TestNavigationEventDispatcherOwner(kotlin.Function1,kotlin.Function1))`(` ` @`[NonNull](/reference/androidx/annotation/NonNull)` Function1\u003c@`[NonNull](/reference/androidx/annotation/NonNull)` `[TestNavigationEventDispatcherOwner](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner)`, `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html)`\u003e fallbackOnBackPressed,` ` @`[NonNull](/reference/androidx/annotation/NonNull)` Function1\u003c@`[NonNull](/reference/androidx/annotation/NonNull)` `[TestNavigationEventDispatcherOwner](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner)`, `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html)`\u003e onHasEnabledCallbacksChanged` `)` |\n\n| ### Public methods |\n|---------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `final int` | [getFallbackOnBackPressedInvocations](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner#getFallbackOnBackPressedInvocations())`()` The number of times [NavigationEventDispatcher.fallbackOnBackPressed](/reference/androidx/navigationevent/NavigationEventDispatcher#fallbackOnBackPressed()) has been invoked. |\n| `@`[NonNull](/reference/androidx/annotation/NonNull)` `[NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) | [getNavigationEventDispatcher](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner#getNavigationEventDispatcher())`()` The [NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) that should handle the navigation events. |\n| `final int` | [getOnHasEnabledCallbacksChangedInvocations](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner#getOnHasEnabledCallbacksChangedInvocations())`()` The number of times [NavigationEventDispatcher.onHasEnabledCallbacksChanged](/reference/androidx/navigationevent/NavigationEventDispatcher#onHasEnabledCallbacksChanged()) has been invoked. |\n\nPublic constructors\n-------------------\n\n### TestNavigationEventDispatcherOwner\n\nAdded in [1.0.0-alpha06](/jetpack/androidx/releases/navigationevent#1.0.0-alpha06) \n\n```\npublic TestNavigationEventDispatcherOwner(\n @NonNull Function1\u003c@NonNull TestNavigationEventDispatcherOwner, Unit\u003e fallbackOnBackPressed,\n @NonNull Function1\u003c@NonNull TestNavigationEventDispatcherOwner, Unit\u003e onHasEnabledCallbacksChanged\n)\n``` \n\n| Parameters |\n|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `@`[NonNull](/reference/androidx/annotation/NonNull)` Function1\u003c@`[NonNull](/reference/androidx/annotation/NonNull)` `[TestNavigationEventDispatcherOwner](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner)`, `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html)`\u003e fallbackOnBackPressed` | A lambda invoked by the [NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) when a back press occurs and no other callbacks handle it. |\n| `@`[NonNull](/reference/androidx/annotation/NonNull)` Function1\u003c@`[NonNull](/reference/androidx/annotation/NonNull)` `[TestNavigationEventDispatcherOwner](/reference/androidx/navigationevent/testing/TestNavigationEventDispatcherOwner)`, `[Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html)`\u003e onHasEnabledCallbacksChanged` | A lambda invoked by the [NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) when its [NavigationEventDispatcher.hasEnabledCallbacks](/reference/androidx/navigationevent/NavigationEventDispatcher#hasEnabledCallbacks()) status changes. |\n\nPublic methods\n--------------\n\n### getFallbackOnBackPressedInvocations\n\nAdded in [1.0.0-alpha06](/jetpack/androidx/releases/navigationevent#1.0.0-alpha06) \n\n```\npublic final int getFallbackOnBackPressedInvocations()\n```\n\nThe number of times [NavigationEventDispatcher.fallbackOnBackPressed](/reference/androidx/navigationevent/NavigationEventDispatcher#fallbackOnBackPressed()) has been invoked. \n\n### getNavigationEventDispatcher\n\nAdded in [1.0.0-alpha06](/jetpack/androidx/releases/navigationevent#1.0.0-alpha06) \n\n```\npublic @NonNull NavigationEventDispatcher getNavigationEventDispatcher()\n```\n\nThe [NavigationEventDispatcher](/reference/androidx/navigationevent/NavigationEventDispatcher) that should handle the navigation events. \n\n### getOnHasEnabledCallbacksChangedInvocations\n\nAdded in [1.0.0-alpha06](/jetpack/androidx/releases/navigationevent#1.0.0-alpha06) \n\n```\npublic final int getOnHasEnabledCallbacksChangedInvocations()\n```\n\nThe number of times [NavigationEventDispatcher.onHasEnabledCallbacksChanged](/reference/androidx/navigationevent/NavigationEventDispatcher#onHasEnabledCallbacksChanged()) has been invoked."]]
