SharedPreferences with Robolectric

TheLastSyncTimestamp.java

import android.content.SharedPreferences;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import static org.junit.Assert.assertEquals;

@RunWith(RobolectricTestRunner.class)
public class TheLastSyncTimestamp {

    private ILastSyncTimestamp tested;

    @Before
    public void beforeEachTest() {
        final SharedPreferences syncPreferences = Robolectric.application.getSharedPreferences("_sync_preferences", 0);
        tested = new LastSyncTimestamp(syncPreferences);
    }

    @Test
    public void setLastSyncTimestamp_stores_timestamp() {
        // given
        tested.setLastSyncTimestamp(1);

        // when
        final long lastTimestampOrZero = tested.getLastTimestampOrZero();

        // then
        assertEquals(1, lastTimestampOrZero);
    }

    @Test
    public void setLastSyncTimestamp_default_value() {
        // when
        final long lastTimestampOrZero = tested.getLastTimestampOrZero();

        // then
        assertEquals(0, lastTimestampOrZero);
    }
}