Can't find parent for StyleData when using Robolectric in Android Studio with AppCompat

Question

I have an Android project which uses:

• Android Studio Gradle structure
• Android AppCompat library
• Robolectric for testing

Testing without involving any Activity (e.g. just asserting 1 == 1), works fine. But, when I use activity creates the following error:

java.lang.RuntimeException: huh? can't find parent for StyleData{name='Theme_Sanactbar', parent='@style/Theme_AppCompat_Light_DarkActionBar'}
    at org.robolectric.shadows.ShadowAssetManager$StyleResolver.getParent(ShadowAssetManager.java:365)
    at org.robolectric.shadows.ShadowAssetManager$StyleResolver.getAttrValue(ShadowAssetManager.java:350)

I tried https://github.com/robolectric/robolectric/issues/979 but it creates the same result.

---

FYI:

This is my PROJECT/build.gradle

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

buildscript {
    repositories {
        mavenCentral()
        // For Robolectric
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
        maven { url 'https://github.com/rockerhieu/mvn-repo/raw/master/' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.11.+'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.2+'
        classpath 'org.robolectric.gradle:gradle-android-test-plugin:0.10.1-SNAPSHOT'
    }
}

allprojects {
    repositories {
        mavenCentral()
        // For Robolectric
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
    }
}

And this is my PROJECT/app/build.gradle

apply plugin: 'android'
apply plugin: 'android-apt'
apply plugin: 'android-test' // Robolectric

repositories {
    mavenLocal()
}

android {
    compileSdkVersion 19
    buildToolsVersion "19.1.0"

    defaultConfig {
        applicationId "id.web.michsan.helloworld"
        minSdkVersion 8
        targetSdkVersion 19
        versionCode 6
        versionName "1.1.1"
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
    if (System.getenv("KEYSTORE") != null) {
        signingConfigs {
            release {
                storeFile file(System.getenv("KEYSTORE"))
                storePassword System.getenv("KEYSTORE_PASSWORD")
                keyAlias System.getenv("KEY_ALIAS")
                keyPassword System.getenv("KEY_PASSWORD")
            }
        }
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
            if (System.getenv("KEYSTORE") != null) {
                signingConfig signingConfigs.release
            }
        }
    }
    /* For the sake of butterknife */
    lintOptions {
        disable 'InvalidPackage'
    }

    sourceSets {
        androidTest.setRoot('src/test') // For Robolectric
    }
}

ext {
    androidApiVersion = '19.1.0'
    butterknifeVersion = '4.0.1'
    robotiumVersion = '5.0.1'
}
dependencies {
    compile 'com.android.support:appcompat-v7:' + androidApiVersion
    compile 'com.android.support:support-v4:' + androidApiVersion
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile(project(':core')) {
        exclude group: 'org.apache.httpcomponents'
        exclude group: 'org.json'
    }
    compile fileTree(dir: '../core/libs', include: ['*.jar'])
    apt 'com.jakewharton:butterknife:' + butterknifeVersion
    compile 'com.jakewharton:butterknife:' + butterknifeVersion
    androidTestCompile 'com.jayway.android.robotium:robotium-solo:' + robotiumVersion

    // For Robolectric
    androidTestCompile 'junit:junit:4.11'
    androidTestCompile 'org.robolectric:robolectric:2.3'

    compile 'com.mopub.mobileads:mopub-android:+@aar'
}


// Robolectric: Add this definition in order to only include files that are suffixed with Test.class and set the max heap size
androidTest {
    include '**/*Test.class'
    maxHeapSize = "2048m"
}

Answer 1

After debugging the Robolectric source, I know that I need to create project.properties file.

Assuming you're using Android Studio project structure, location of the file is PROJECT_X/app/src/main/project.properties

The content is

android.library.reference.1=/../../../build/intermediates/exploded-aar/com.android.support/appcompat-v7/19.1.0

This is because Robolectric's AndroidManifest.getBaseDir() gives you /path/into/AndroidStudioProjects/PROJECT_X/app/src/main.

So, this base directory is appended with the reference location. On this case, I can ensure that /path/into/AndroidStudioProjects/PROJECT_X/app/src/main + /../../../build/intermediates/exploded-aar/com.android.support/appcompat-v7/19.1.0 gives me a directory which contains AndroidManifest.xml of the appcompat library.