Robolectric Unit Testing Sugar ORM

I'm new with unit testing, even newer with Robolectric. Now, I'm trying to run Robolectric testing with Sugar ORM, but keep getting this message

objc[535]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/bin/java and /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
Connected to the target VM, address: '127.0.0.1:61500', transport: 'socket'
No such manifest file: /Users/virginia/Documents/Android%20Developer/ravnandroid_v5/app/build/intermediates/manifests/full/debug/AndroidManifest.xml
meta data -> {}
java.lang.NullPointerException: SugarContext has not been initialized properly. Call SugarContext.init(Context) in your Application.onCreate() method and SugarContext.terminate() in your Application.onTerminate() method.

    at com.orm.SugarContext.getSugarContext(SugarContext.java:24)
    at com.orm.SugarRecord.save(SugarRecord.java:360)
    at com.orm.TestSugarApp.insertUserTest(TestSugarApp.java:53)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [...]

Disconnected from the target VM, address: '127.0.0.1:61500', transport: 'socket'

Process finished with exit code 255

This is my graddle dependency:

compile group: 'com.google.guava', name: 'guava', version: '19.0'
testCompile 'junit:junit:4.12'
testCompile "org.robolectric:robolectric:3.1.2"

Test Class

package com.orm;

@RunWith(CustomRoboelectricGradleTestRunner.class)
@Config( constants = BuildConfig.class, sdk = 23)
public class TestSugarApp {

    @Test
    public void startEverTestSugarAppAsFirst() {
        assertEquals(4, 2 + 2);
    }

    @Test
    public void insertUserTest() {
        DBRavnUser user = new DBRavnUser("8099999999", "Sample User");
        long id = user.save();
        assertEquals(id > 0, id);
    }
}

This, my RobolectricGradleTestRunner extension:

public class CustomRoboelectricGradleTestRunner extends RobolectricGradleTestRunner {
    public CustomRoboelectricGradleTestRunner(Class<?> testClass) throws InitializationError {
        super(testClass);
        String buildVariant = (BuildConfig.FLAVOR.isEmpty()
                ? "" : BuildConfig.FLAVOR+ "/") + BuildConfig.BUILD_TYPE;
        String intermediatesPath = BuildConfig.class.getResource("")
                .toString().replace("file:", "");
        intermediatesPath = intermediatesPath.substring(0, intermediatesPath.indexOf("/classes"));

        System.setProperty("android.package",
                BuildConfig.APPLICATION_ID);
        System.setProperty("android.manifest",
                intermediatesPath + "/manifests/full/" + buildVariant + "/AndroidManifest.xml");
        System.setProperty("android.resources", intermediatesPath + "/res/merged/" + buildVariant);
        System.setProperty("android.assets", intermediatesPath + "/assets/" + buildVariant);
    }

    @Override
    protected AndroidManifest getAppManifest(Config config) {

        String manifestProperty = System.getProperty("android.manifest");
        String resProperty = System.getProperty("android.resources");
        String assetsProperty = System.getProperty("android.assets");
        AndroidManifest manifest = new AndroidManifest(
                Fs.fileFromPath(manifestProperty),
                Fs.fileFromPath(resProperty),
                Fs.fileFromPath(assetsProperty)) {

            @Override
            public Map<String, Object> getApplicationMetaData() {
                Map<String, Object> metadata =  super.getApplicationMetaData();
                metadata.put("DATABASE", "rcn.db");
                metadata.put("VERSION", "16");
                metadata.put("QUERY_LOG", "false");
                metadata.put("DOMAIN_PACKAGE_NAME", BuildConfig.APPLICATION_ID);
                return metadata;
            }
        };
        manifest.setPackageName(BuildConfig.APPLICATION_ID);
        return manifest;
    }
}

As you see here, I'm overriding getApplicationMetaData to setup SugarORM metadata info.

Any help in the correct direction will be appreciated.

Regards.