'android.support.test.espresso does not exist' when I want to use it to individual apk test

Question

I need to do some auto testing jobs to an Android application without its source code. I found both robotium and espresso can do this job, I decided to use espresso because its Google support.

I would like to sign both the target apk and espresso test apk with the same signature, the target apk is the same as this sample.

When I start to coding the espresso test apk, I did the following jobs.

The build.gradle in Module:app:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "tk.deedog.i01test"
        minSdkVersion 15
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'

    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.0'
    androidTestCompile 'com.android.support.test:testing-support-lib:0.1'
}

The source code of my I01Test.java:

package tk.deedog.i01test;

import android.app.Activity;
import android.test.ActivityInstrumentationTestCase2;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.matcher.ViewMatchers.withText;


public class I01Test extends ActivityInstrumentationTestCase2 {
    private static final String LAUNCHER_ACTIVITY_FULL_CLASSNAME = "tk.tubabe.instrustmen101.Instruments101";
    private static Class<?> launcherActivityClass;
    Activity i101Acitvity;

    static {
        try {
            launcherActivityClass = Class.forName(LAUNCHER_ACTIVITY_FULL_CLASSNAME);
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }

    public I01Test() {
        super(launcherActivityClass);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        i101Acitvity = getActivity();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    public void testButtonClick() {
        onView(withText("Send")).perform(click());
    }
}

When I tried to run this program, Android studio told me that Error:(6, 44) error: package android.support.test.espresso does not exist.

Answer 1

I had this same issue, one thing that was ruining my test build is the following line:

main { java.srcDirs = ['src/main/java', 'src/AndroidTests', 'src/AndroidTest/java'] }

Remove test code from srcDirs:

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

Answer 2

I think you'd be better off not defining custom sourceSets. I just comment

sourceSets

from my build.gradle and its working fine.

Answer 3

On my app build.gradle this dependency was missing:
androidTestImplementation 'com.android.support.test:rules:1.0.2'