Package org.robolectric.junit.rules

Class BackgroundTestRule

java.lang.Object

org.robolectric.junit.rules.BackgroundTestRule

All Implemented Interfaces:

org.junit.rules.TestRule

public final class BackgroundTestRule
extends Object
implements org.junit.rules.TestRule

Let tests to run on background thread, if it has annotation BackgroundTestRule.BackgroundTest.

This is useful for testing logic that explicitly forbids being called on the main thread.

Example usage:

 @Rule public final BackgroundTestRule backgroundTestRule = new BackgroundTestRule();

 @Test
 @BackgroundTest
 public void testInBackground() {
   assertThat(Looper.myLooper()).isNotEqualTo(Looper.getMainLooper());
 }

 @Test
 public void testInForeground() throws Exception {
   assertThat(Looper.myLooper()).isEqualTo(Looper.getMainLooper());
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	BackgroundTestRule.BackgroundTest	Annotation for test methods that need to be executed in a background thread.

Constructor Summary

Constructors

Constructor	Description
BackgroundTestRule()

Method Summary

Modifier and Type	Method	Description
org.junit.runners.model.Statement	apply(org.junit.runners.model.Statement base, org.junit.runner.Description description)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BackgroundTestRule

public BackgroundTestRule()

Method Details

apply

public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement base, org.junit.runner.Description description)

Specified by:

apply in interface org.junit.rules.TestRule