Eu sou novo no desenvolvimento de aplicativos para Android e acabei de criar um aplicativo para anotações. Quero fazer testes de unidade para os métodos insertNote, readNote e updateNote para o banco de dados. Como faço para fazer isso? Este é o código para o meu banco de dados. Obrigado.

public class  DatabaseManager extends SQLiteOpenHelper {


public static final String Database_Name = "Notes Database";
public static final String Table_Name = "notes";

public static final String Column_id = "textId";
public static final String Column_title = "textTitle";
public static final String Column_body = "textBody";

public DatabaseManager(Context context){
    super(context, Database_Name, null, 1);
}

@Override
public void onCreate(SQLiteDatabase db){
    db.execSQL("CREATE TABLE " + Table_Name + " (" + Column_id +
            " INTEGER PRIMARY KEY AUTOINCREMENT, " + Column_title +
            " TEXT, " + Column_body + " TEXT)");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion){
    db.execSQL("DROP TABLE IF EXISTS" + Table_Name);
    onCreate(db);
}

public void insertNote(Note note){
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(Column_title, note.getTextTitle());
    values.put(Column_body, note.getTextBody());

    boolean result = db.insert(Table_Name, null, values) > 0;
    if (result == true)
        Log.d("Create", "Data Has Been Saved");
    db.close();
}

public Cursor readNote(int id){
    SQLiteDatabase db = this.getReadableDatabase();

    Cursor cursor = db.rawQuery("SELECT * FROM " + Table_Name + " WHERE _ROWID_ = " + id, null);

    if (cursor != null){
        cursor.moveToFirst();
    }

    Note myNote, = new Note();
    myNote.textId = cursor.getInt(cursor.getColumnIndex(Column_id));
    myNote.textTitle = cursor.getString(cursor.getColumnIndex(Column_title));

    return cursor;
}

public ArrayList<String> getNoteList(){
    ArrayList<String> noteList =  new ArrayList<>();
    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery("SELECT * FROM " + Table_Name, null);
    cursor.moveToFirst();

    if (cursor.moveToFirst()){
        do{
            //noteList.add(cursor.getInt(cursor.getColumnIndex(Column_id)));
            noteList.add(cursor.getString(cursor.getColumnIndex(Column_title)));
        }
        while (cursor.moveToNext());
    }

    return noteList;
}

public int updateNote(Note note){
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put("textTitle", note.getTextTitle());
    values.put("textBody", note.getTextBody());

    int update = db.update(Table_Name, values, Column_id + " = ?", new String[]{Integer.toString(note.getTextId())});
    return update;
}

public Integer deleteNote(int id){
    SQLiteDatabase db = this.getWritableDatabase();
   return db.delete(Table_Name, Column_id + " = ?", new String[]{Integer.toString(id)} );
}

public int getCount(){
    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery("SELECT * FROM " + Table_Name, null);
    cursor.close();

    return cursor.getCount();
}

}