Android Studio - Unit Tests Simulate App Restart

Hello I would like to use Unit Tests to see if my Data Save Structe is working the problem is, that I have no Idea how to Simulate a Restart programmatically.

Here is a Example Unit Test.

(AppData is just a Class to save various Things like a Shopping List with multiple Entries.)

@Test
    public void getDataAfterRestart(){
        //Save a Entry
        AppData appData = new AppData();
        appData.addShoppingEntry(new ShoppingEntry("Bread"));
        appData.save();


        //************************
        //Restart the Application*
        //************************


        //After the App reopend it self check if the Entry is still here
        int entries = appData.getShoppingEntries().size();

        assertEquals(1,entries);
}

What are some good practices, to deal with problems like this?

Thank you in advance!