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InstantTaskExecutorRule

Artifact: androidx.arch.core:core-testing

View Source

Added in 2.0.0

Kotlin |Java

public class InstantTaskExecutorRule extends TestWatcher

java.lang.Object
	org.junit.rules.TestWatcher
		androidx.arch.core.executor.testing.InstantTaskExecutorRule

A JUnit Test Rule that swaps the background executor used by the Architecture Components with a different one which executes each task synchronously.

You can use this rule for your host side tests that use Architecture Components.

Summary

Public constructors
`InstantTaskExecutorRule()`

Protected methods
`void`	`finished(Description description)`
`void`	`starting(Description description)`

Inherited methods

From org.junit.rules.TestWatcher

`Statement`	`apply(Statement base, Description description)`
`void`	`failed(Throwable e, Description description)`
`void`	`skipped(AssumptionViolatedException e, Description description)`
`void`	`succeeded(Description description)`

Public constructors

InstantTaskExecutorRule

Added in 2.0.0

public InstantTaskExecutorRule()

Protected methods

finished

protected void finished(Description description)

starting

protected void starting(Description description)

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Last updated 2026-06-24 UTC.

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