Java – Android data binding test failed in module NoClassDefFoundError

I cannot run local unit tests in a module that uses the Android data binding library

First, let me talk about how to configure the project structure

project
      | app
           -MainLauncherActivity
      | myLibrary
            -CommonModuleActivity

I created a new project and then added a new module "MyLibrary"

The main "app" depends on the "MyLibrary" module I added an activity in "MyLibrary" that supports data binding I called a module specific activity from the main "app" activity when I clicked the button It just works and can run applications

However, when I add test cases for module activities, I get the following error

AndroidStudio：2.3

Gradle build tools version 2.3.0 -->
Error:java.lang.NoClassDefFoundError: android/databinding/DataBinderMapper


Gradle build tools version 2.2.3 -->
Error:java.lang.NoClassDefFoundError: android/databinding/ViewDataBinding

PROJECT IDE SCREENSHOT

Project root gradle file:

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        //classpath 'com.android.tools.build:gradle:2.3.0'
        classpath 'com.android.tools.build:gradle:2.2.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Here is "app" build gradle：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
    defaultConfig {
        applicationId "com.example.bindingtest"
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        }
    }

    dataBinding {
        enabled true
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:25.1.0'
    //compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
    testCompile 'junit:junit:4.12'
    compile project(':mylibrary')
}

In MyLibrary build Below gradle:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.2"

    defaultConfig {
        minSdkVersion 21
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        }
    }
    dataBinding {
        enabled 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.android.support:appcompat-v7:25.1.0'
    testCompile 'junit:junit:4.12'
    testCompile "org.mockito:mockito-core:1.10.19"
}

LibraryActivity：

public class MyLibraryActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMyLibraryBinding binding = DataBindingUtil.setContentView(this,R.layout.activity_my_library);
        //set data to binding
    }
}

The corresponding test cases can be found in the attached screenshot

Someone can tell me what I did wrong here to test it

App works normally, only the unit test fails!

Solution

I think this is a known problem, you can check here I have been following this issue since February It doesn't seem to have been repaired