Why can't I import AndroidJUnit4 and ActivityTestRule into my unit test class?

Question

I\'m having trouble importing some of the Android UI testing framework classes - I just can\'t figure out what is going wrong!

This is my class:

@Run         


        

Answer 1

There are two different types of tests you can set up in Android

Unit Tests

• These run directly on the JVM and do not have access to the Android framework classes.
• They are kept in the test/java package
• Dependencies need to added in the build.gradle file with the command testCompile
• You generally use Mockito, Robolectric & JUnit for these tests

Instrumentation Tests

• These run on an Android emulator and have full access to all the Android classes
• They are kept in the androidTest/java package
• Dependencies need to be added to build.gradle with androidTestCompile
• You generally use Espresso and JUnit for these tests

From what I can tell you are trying to write instrumentation tests with Espresso but have your test in the test/java package which is for unit tests. In that case you need to move your test class to the androidTest/java package.

Answer 2

Add dependency.

androidTestCompile 'com.android.support.test:rules:0.5'
androidTestCompile 'com.android.support.test:runner:0.5'

Answer 3

Adding:

androidTestImplementation 'com.android.support.test:rules:1.0.2'

solves problem, but don't forget to sync the project with gradle files. Only then the changes will take effect.

Answer 4

need this add dependencies

 testCompile 'com.android.support.test:rules:0.5'
 testCompile 'com.android.support.test:runner:0.5'

Answer 5

For writing UI tests((tests that run on Android Device/Emulator)) in Android, make sure that

1. The Test classes are in androidTest package rather that test package.

2. Make sure you make the following dependencies in build.gradle

androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test:rules:1.2.0'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
testImplementation 'junit:junit:4.13'

For Unit Testing(tests that run on JVM) make sure

1.Test classes are in test package

2.Make sure you make the following dependencies in build.gradle

testImplementation 'junit:junit:4.13'
testImplementation 'org.mockito:mockito-core:2.23.0'

Answer 6

Add these in the newer version:

androidTestImplementation 'com.android.support.test:rules:1.0.2'
androidTestImplementation 'com.android.support.test:runner:1.0.2'