java - Can't select Test class in Edit Configuration -

i have created espresso/uiautomator unit test. however, when try run it, android studio won't recognize it. button select testlogin.java greyed out. i'm using android studio 2.0 preview 5.

package com.greenrobot.yesorno.test.testlogin  import android.support.test.rule.activitytestrule; import android.support.test.runner.androidjunit4; import android.test.suitebuilder.annotation.largetest;  import org.junit.rule; import org.junit.test; import org.junit1.runner.runwith; import android.support.test.espresso.*;   /**  * created andytriboletti on 1/15/16.  */ @runwith(androidjunit4.class) @largetest public class testlogin extends activityinstrumentationtestcase2<startactivity> {     public testlogin(class<startactivity> activityclass) {         super(activityclass);     }     private uidevice mdevice;      @rule     public activitytestrule<home> mactivityrule = new activitytestrule(home.class);      @test     public void testlogin() {         mdevice = uidevice.getinstance(instrumentationregistry.getinstrumentation());          // start home screen         mdevice.presshome();         onview(withtext("hello world!")).check(matches(isdisplayed()));          onview(withid(r.id.changetextbt)).perform(click());      } 

my build.gradle:

   buildscript {     repositories {         maven { url 'https://maven.fabric.io/public' }     }      dependencies {         classpath 'io.fabric.tools:gradle:1.+'     } } apply plugin: 'com.android.application' apply plugin: 'io.fabric'     android {     aaptoptions.setproperty("cruncherenabled", false)      sourcesets {          androidtest {             java.srcdirs = ['androidtest/java']         }     }      lintoptions {         // set true turn off analysis progress reporting lint         quiet true         // if true, stop gradle build if errors found         abortonerror false         // if true, report errors         ignorewarnings true     }      productflavors {         // actual application flavor         production {             minsdkversion 15         }         // test application flavor uiautomatior tests         mytest {             minsdkversion 18         }     }     compilesdkversion 23     buildtoolsversion "23.0.2"      defaultconfig {         applicationid "com.greenrobot.yesorno"         minsdkversion 15         targetsdkversion 22         multidexenabled = true         testinstrumentationrunner "android.support.test.runner.androidjunitrunner"     }      buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.txt'         }     }     packagingoptions {         exclude 'meta-inf/asl2.0'         exclude 'meta-inf/license'         exclude 'meta-inf/maven/com.google.guava/guava/pom.properties'         exclude 'meta-inf/maven/com.google.guava/guava/pom.xml'     } }  repositories {     mavencentral()     maven { url 'https://maven.fabric.io/public' } }  repositories {     maven { url "http://jzaccone.github.io/slidingmenu-aar" }  } repositories {     maven { url "http://dl.bintray.com/populov/maven" }  }    dependencies {     compile 'com.squareup.picasso:picasso:2.5.2'     compile 'com.android.support:multidex:1.0.1'     compile 'com.robbypond:mopub-android-sdk:3.9.0'     compile 'com.facebook.android:facebook-android-sdk:4.7.0'     compile 'com.jeremyfeinstein.slidingmenu:library:1.3@aar'     compile 'com.android.support:support-v4:23.1.1'     compile files('libs/flurryagent.jar')     compile files('libs/autobahn-android-0.5.2-snapshot.jar')     compile 'com.actionbarsherlock:actionbarsherlock:4.4.0@aar'     compile project(':viewpagerindicator')     compile files('libs/gcm.jar')     compile 'com.jakewharton.timber:timber:3.1.0'     compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') {         transitive = true;     }     compile 'com.squareup.okhttp3:okhttp:3.0.1'       compile 'com.android.support:support-annotations:23.1.1'     compile 'com.google.guava:guava:18.0'      // testing-only dependencies     androidtestcompile 'com.android.support:support-annotations:23.1.1'     androidtestcompile 'com.android.support.test:runner:0.4.1'     androidtestcompile 'com.android.support.test:rules:0.4.1'     androidtestcompile 'com.android.support.test.espresso:espresso-core:2.2.1'     androidtestcompile 'com.android.support.test.uiautomator:uiautomator-v18:2.0.0' } 

edit: here's picture of android studio.

edit2: enable test artifacts (unit testing , instrumentation test) enabled.

add 1 more package name test that: com.greenrobot.yesorno.test. put testlogin test inside it. should solve problem.

also: activityinstrumentationtestcase2 deprecated , can't used activitytestrule. leave activitytestrule , remove extends part , constructor. i'd suggest add setup() method @before annotation , instantiate mdevice there, available each test you'll have in test class.

update: remove this, sync , clean:

 androidtest {      java.srcdirs = ['androidtest/java']  }