Getting error while generating test cases for espr

Question

I am following these two links 1 and 2 for espresso test report but getting error while running ./gradlew createDebugCoverageReport. The error will be shown in image given below. Please help me, I am not able to generated report for espresso and ui automation test cases. Now trying to use jacoco but not able to find any solution.

Build.Gradle

apply plugin: 'com.android.application'
android {
    compileSdkVersion 24
    buildToolsVersion '25.0.0'
    defaultConfig {
        applicationId "com.example.project"
        minSdkVersion 18
        targetSdkVersion 24
        versionCode 27
        versionName "1.5"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            testCoverageEnabled true
        }
        debug{
            testCoverageEnabled true
        }
    }
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.github.barteksc:android-pdf-viewer:2.0.3'
    compile 'com.google.code.gson:gson:2.8.0'
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.android.support:design:24.2.1'
    compile 'com.android.support:recyclerview-v7:24.2.1'
    compile 'com.android.support:cardview-v7:24.2.1'
    compile 'com.android.volley:volley:1.0.0'
    compile 'com.android.support:support-v4:24.2.1'
    compile 'com.google.firebase:firebase-messaging:10.0.1'
    compile 'com.google.firebase:firebase-core:10.0.1'
    compile 'com.google.firebase:firebase-crash:10.0.1'
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:support-annotations:24.2.0'
    androidTestCompile 'com.android.support.test:runner:0.2'
    androidTestCompile 'com.android.support.test:rules:0.2'
    androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.0'
    androidTestCompile 'com.android.support:support-annotations:24.2.1'
    androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2') {
        exclude group: 'com.android.support', module: 'appcompat'
        exclude group: 'com.android.support', module: 'support-v4'
        exclude group: 'com.android.support', module: 'support-v7'
        exclude group: 'com.android.support', module: 'design'
        exclude module: 'support-annotations'
        exclude module: 'recyclerview-v7'



    }
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
    androidTestCompile "com.android.support.test.espresso:espresso-intents:2.2.2"
}

apply plugin: 'com.google.gms.google-services'
apply plugin: 'jacoco'

task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest', 'createDebugCoverageReport']) {

    reports {
        xml.enabled = true
        html.enabled = true
    }

    def fileFilter = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*', 'android/**/*.*']
    def debugTree = fileTree(dir: "${buildDir}/intermediates/classes/debug", excludes: fileFilter)
    def mainSrc = "${project.projectDir}/src/main/java"

    sourceDirectories = files([mainSrc])
    classDirectories = files([debugTree])
    executionData = fileTree(dir: "$buildDir", includes: [
            "jacoco/testDebugUnitTest.exec",
            "outputs/code-coverage/connected/*coverage.ec"
    ])
}

Answer 1

A few things that got this running:

1. Make sure that all the requisites are checked, per this other thread: https://stackoverflow.com/a/25525390/3195307
2. Make sure there is a connected device ready to execute your tests. Emulator, physical device, or cloud device. It should show in 'Select Deployment Target' under 'connected devices' if you play your tests in IDE.
3. Run Gradlew (project gradle wrapper) from the project directory like so: ./gradlew :app:createDebugCoverageReport