Android studio - androidTest folder is missing

Question

I'm working on automation test using Espresso.

The folder in which Instrumentation test classes can be written is missing

Screenshot of the project

I tried by adding

android{    
        sourceSets{
        main { java.srcDirs = ['src/main/java'] }
        test { java.srcDirs = ['src/test/java'] }
        androidTest { java.srcDirs = ['src/androidTest/java'] }
    }

}

inside build.gradle but didn't work.

Tried to generate by using other solutions provided in this question still doesn't work

Answer 1

The quickest way is to auto-generate the folder and record an espresso test. On the top menu bar of Android Studio, click on "Run" then -> "Record Espresso Test".

This will start your emulator and also open up the recorder dialog. Then just perform a few actions on your emulator and then click "ok" on the recorder dialog. Android Studio will generate the test as well as the missing folder. You will basically have a template test setup for you to start editing as you wish.

Answer 2

1. Create your androidTest folder like any other folder. Put it under app/src. You can event create this folder outside Android Studio if you want.

2. Put the right dependencies in your build.gradle file. Something like this:

   testImplementation 'junit:junit:4.12'
   testImplementation 'androidx.arch.core:core-testing:2.0.1'
   
   androidTestImplementation 'androidx.test:rules:1.1.1'
   androidTestImplementation 'androidx.test:runner:1.1.2-alpha02'
   androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0-alpha02'
   androidTestImplementation 'androidx.test.ext:junit:1.1.0'
   androidTestImplementation 'androidx.test.espresso:espresso-intents:3.1.1'
   

3. Put the testInstrumentationRunner setting in your build.gradle file:

   android {
      defaultConfig {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
      }
   }
   

4. And in your test class, which you will save under app/src/androidTest/[your namespace here], will look something like this:

   import android.content.Context;
   import android.support.test.InstrumentationRegistry;
   import android.support.test.runner.AndroidJUnit4;
   
   import org.junit.Test;
   import org.junit.runner.RunWith;
   
   import static org.junit.Assert.assertEquals;
   
   @RunWith(AndroidJUnit4.class)
   public class PrincipalTest {
   
       @Test
       public void testAppContext() {
           Context context = InstrumentationRegistry.getTargetContext();
           assertEquals("my.package.name", context.getPackageName());
       }
   
   }
   

Answer 3

Right click to your src folder and add a new directory then click androidTest\java