Robolectric Tips And Tricks to add to android project

Robolectric Tips And Tricks

##### dependencies to add for robolectric + fest-android

--> in top-level build.gradle

dependencies {
    ...
    classpath 'org.robolectric:robolectric-gradle-plugin:0.12.+'
}

--> in build.gradle

{
...
apply plugin: 'robolectric'
...
dependencies {
...
androidTestCompile 'org.hamcrest:hamcrest-integration:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-core:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-library:1.1'

    androidTestCompile 'com.squareup:fest-android:1.0.+'

    androidTestCompile('junit:junit:4.+') {
        exclude module: 'hamcrest-core'
    }
    androidTestCompile('org.robolectric:robolectric:2.3') {
        exclude module: 'classworlds'
        exclude module: 'commons-logging'
        exclude module: 'httpclient'
        exclude module: 'maven-artifact'
        exclude module: 'maven-artifact-manager'
        exclude module: 'maven-error-diagnostics'
        exclude module: 'maven-model'
        exclude module: 'maven-project'
        exclude module: 'maven-settings'
        exclude module: 'plexus-container-default'
        exclude module: 'plexus-interpolation'
        exclude module: 'plexus-utils'
        exclude module: 'support-v4'
        exclude module: 'wagon-file'
        exclude module: 'wagon-http-lightweight'
        exclude module: 'wagon-provider-api'
    }
...
}
}

##### Add test folder sitting next to the main folder of Android application, under the src/ folder

src/
|------androidTest/java/com.bla.myapp.test
|------main/java/com.bla.myapp
|------main/res/stuff/bla.jpeg
|------AndroidManifest.xml

##### Need custom runner to generate AndroidManifest on the fly with targat API 18 as Robolectric doesn't support above

public class GenyRobolectricTestRunner extends RobolectricTestRunner {
    private static final int MAX_SDK_SUPPORTED_BY_ROBOLECTRIC = 18;

    public GenyRobolectricTestRunner(Class<?> testClass) throws InitializationError {
        super(testClass);
    }

    @Override
    protected AndroidManifest getAppManifest(Config config) {
        String manifestProperty = System.getProperty("android.manifest");
        if (config.manifest().equals(Config.DEFAULT) && manifestProperty != null) {
            String resProperty = System.getProperty("android.resources");
            String assetsProperty = System.getProperty("android.assets");
            return new AndroidManifest(Fs.fileFromPath(manifestProperty), Fs.fileFromPath(resProperty),
                    Fs.fileFromPath(assetsProperty)){
                @Override
                public int getTargetSdkVersion() {
                    return MAX_SDK_SUPPORTED_BY_ROBOLECTRIC;
                }
            };
        }
        AndroidManifest appManifest = super.getAppManifest(config);
        return appManifest;
    }

}