@Test
  public void testNewResultSet_GetMergeCost() throws Exception {

    // Mocks
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);
    java.sql.ResultSet resultSet = mock(java.sql.ResultSet.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class))).thenReturn(connection);
    when(connection.prepareStatement(
            "SELECT COUNT(objectKey) FROM " + TABLE_NAME + " WHERE value = ?;"))
        .thenReturn(preparedStatement);
    when(preparedStatement.executeQuery()).thenReturn(resultSet);
    when(resultSet.getStatement()).thenReturn(preparedStatement);
    when(resultSet.next()).thenReturn(true);
    when(resultSet.getInt(1)).thenReturn(3);

    // Iterator
    ResultSet<Car> carsWithAbs =
        new SQLiteIndex<String, Car, Integer>(
                Car.FEATURES, OBJECT_TO_ID, ID_TO_OBJECT, connectionManager)
            .retrieve(equal(Car.FEATURES, "abs"), new QueryOptions());

    Assert.assertNotNull(carsWithAbs);
    int size = carsWithAbs.getMergeCost();

    assertEquals(3, size);
    verify(connection, times(1)).close();
  }
  @Test
  public void testInit_NonEmptyCollection() throws Exception {

    // Mock
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    Connection connection1 = mock(Connection.class);
    Statement statement = mock(Statement.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);

    when(connection1.prepareStatement("INSERT OR IGNORE INTO " + TABLE_NAME + " values(?, ?);"))
        .thenReturn(preparedStatement);
    when(connectionManager.getConnection(any(SQLiteIndex.class)))
        .thenReturn(connection)
        .thenReturn(connection1);
    when(connectionManager.isApplyUpdateForIndexEnabled(any(SQLiteIndex.class))).thenReturn(true);
    when(connection.createStatement()).thenReturn(statement);
    when(preparedStatement.executeBatch()).thenReturn(new int[] {2});

    // The objects to add
    Set<Car> initWithObjects = new HashSet<Car>(2);
    initWithObjects.add(
        new Car(1, "Ford", "Focus", Car.Color.BLUE, 5, 9000.50, Arrays.asList("abs", "gps")));
    initWithObjects.add(
        new Car(2, "Honda", "Civic", Car.Color.RED, 5, 5000.00, Arrays.asList("airbags")));

    SQLiteIndex<String, Car, Integer> carFeaturesOffHeapIndex =
        new SQLiteIndex<String, Car, Integer>(
            Car.FEATURES, OBJECT_TO_ID, ID_TO_OBJECT, connectionManager);

    carFeaturesOffHeapIndex.init(initWithObjects, new QueryOptions());

    // Verify
    verify(statement, times(1))
        .executeUpdate(
            "CREATE TABLE IF NOT EXISTS "
                + TABLE_NAME
                + " (objectKey INTEGER, value TEXT, PRIMARY KEY (objectKey, value)) WITHOUT ROWID;");
    verify(statement, times(1))
        .executeUpdate(
            "CREATE INDEX IF NOT EXISTS " + INDEX_NAME + " ON " + TABLE_NAME + " (value);");
    verify(statement, times(2)).close();
    verify(connection, times(1)).close();

    verify(preparedStatement, times(2)).setObject(1, 1);
    verify(preparedStatement, times(1)).setObject(1, 2);
    verify(preparedStatement, times(1)).setObject(2, "abs");
    verify(preparedStatement, times(1)).setObject(2, "gps");
    verify(preparedStatement, times(1)).setObject(2, "airbags");
    verify(preparedStatement, times(3)).addBatch();
    verify(preparedStatement, times(1)).executeBatch();
    verify(preparedStatement, times(1)).close();
    verify(connection1, times(1)).close();
  }
  @Test
  public void testNotifyObjectsRemoved() throws Exception {

    // Mock
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    Connection connection1 = mock(Connection.class);
    Statement statement = mock(Statement.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class)))
        .thenReturn(connection)
        .thenReturn(connection1);
    when(connectionManager.isApplyUpdateForIndexEnabled(any(SQLiteIndex.class))).thenReturn(true);
    when(connection.createStatement()).thenReturn(statement);
    when(connection1.prepareStatement("DELETE FROM " + TABLE_NAME + " WHERE objectKey = ?;"))
        .thenReturn(preparedStatement);
    when(preparedStatement.executeBatch()).thenReturn(new int[] {1});

    // The objects to add
    Set<Car> removedObjects = new HashSet<Car>(2);
    removedObjects.add(
        new Car(1, "Ford", "Focus", Car.Color.BLUE, 5, 9000.50, Arrays.asList("abs", "gps")));
    removedObjects.add(
        new Car(2, "Honda", "Civic", Car.Color.RED, 5, 5000.00, Arrays.asList("airbags")));

    @SuppressWarnings({"unchecked", "unused"})
    SQLiteIndex<String, Car, Integer> carFeaturesOffHeapIndex =
        new SQLiteIndex<String, Car, Integer>(
            Car.FEATURES, OBJECT_TO_ID, ID_TO_OBJECT, connectionManager);

    carFeaturesOffHeapIndex.removeAll(removedObjects, new QueryOptions());

    // Verify
    verify(statement, times(1))
        .executeUpdate(
            "CREATE TABLE IF NOT EXISTS "
                + TABLE_NAME
                + " (objectKey INTEGER, value TEXT, PRIMARY KEY (objectKey, value)) WITHOUT ROWID;");
    verify(statement, times(1))
        .executeUpdate(
            "CREATE INDEX IF NOT EXISTS " + INDEX_NAME + " ON " + TABLE_NAME + " (value);");
    verify(connection, times(1)).close();

    verify(preparedStatement, times(1)).setObject(1, 1);
    verify(preparedStatement, times(1)).setObject(1, 2);
    verify(preparedStatement, times(2)).addBatch();
    verify(preparedStatement, times(1)).executeBatch();
    verify(connection1, times(1)).close();
  }
  @Test
  public void testNewResultSet_Iterator_Close() throws Exception {

    QueryOptions queryOptions = new QueryOptions();

    // Mocks
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    PreparedStatement preparedStatement = mock(PreparedStatement.class);
    java.sql.ResultSet resultSet = mock(java.sql.ResultSet.class);
    @SuppressWarnings("unchecked")
    SimpleAttribute<Integer, Car> idToObject =
        (SimpleAttribute<Integer, Car>) mock(SimpleAttribute.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class))).thenReturn(connection);
    when(connection.prepareStatement(
            "SELECT DISTINCT objectKey, value FROM " + TABLE_NAME + " WHERE value = ?;"))
        .thenReturn(preparedStatement);
    when(preparedStatement.executeQuery()).thenReturn(resultSet);
    when(resultSet.getStatement()).thenReturn(preparedStatement);
    when(resultSet.next()).thenReturn(true).thenReturn(true).thenReturn(false);
    when(resultSet.getInt(1)).thenReturn(1).thenReturn(3);
    when(idToObject.getValue(1, queryOptions)).thenReturn(data.get(0));
    when(idToObject.getValue(3, queryOptions)).thenReturn(data.get(2));

    // Iterator
    ResultSet<Car> carsWithAbs =
        new SQLiteIndex<String, Car, Integer>(
                Car.FEATURES, OBJECT_TO_ID, idToObject, connectionManager)
            .retrieve(equal(Car.FEATURES, "abs"), queryOptions);

    Assert.assertNotNull(carsWithAbs);
    Iterator carsWithAbsIterator = carsWithAbs.iterator();

    assertTrue(carsWithAbsIterator.hasNext());
    Assert.assertNotNull(carsWithAbsIterator.next());
    assertTrue(carsWithAbsIterator.hasNext());
    Assert.assertNotNull(carsWithAbsIterator.next());
    assertFalse(carsWithAbsIterator.hasNext());

    // The end of the iteration should close the resources
    verify(connection, times(1)).close();
    verify(preparedStatement, times(1)).close();
    verify(resultSet, times(1)).close();
  }
  @Test
  public void testNewResultSet_Contains() throws Exception {

    // Mocks
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connectionContains = mock(Connection.class);
    Connection connectionDoNotContain = mock(Connection.class);
    PreparedStatement preparedStatementContains = mock(PreparedStatement.class);
    PreparedStatement preparedStatementDoNotContains = mock(PreparedStatement.class);
    java.sql.ResultSet resultSetContains = mock(java.sql.ResultSet.class);
    java.sql.ResultSet resultSetDoNotContain = mock(java.sql.ResultSet.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class)))
        .thenReturn(connectionContains)
        .thenReturn(connectionDoNotContain);
    when(connectionContains.prepareStatement(
            "SELECT COUNT(objectKey) FROM " + TABLE_NAME + " WHERE value = ? AND objectKey = ?;"))
        .thenReturn(preparedStatementContains);
    when(connectionDoNotContain.prepareStatement(
            "SELECT COUNT(objectKey) FROM " + TABLE_NAME + " WHERE value = ? AND objectKey = ?;"))
        .thenReturn(preparedStatementDoNotContains);
    when(preparedStatementContains.executeQuery()).thenReturn(resultSetContains);
    when(preparedStatementDoNotContains.executeQuery()).thenReturn(resultSetDoNotContain);
    when(resultSetContains.next()).thenReturn(true).thenReturn(false);
    when(resultSetContains.getInt(1)).thenReturn(1);
    when(resultSetDoNotContain.next()).thenReturn(true).thenReturn(false);
    when(resultSetDoNotContain.getInt(1)).thenReturn(0);

    // Iterator
    ResultSet<Car> carsWithAbs =
        new SQLiteIndex<String, Car, Integer>(
                Car.FEATURES, OBJECT_TO_ID, ID_TO_OBJECT, connectionManager)
            .retrieve(equal(Car.FEATURES, "abs"), new QueryOptions());

    Assert.assertNotNull(carsWithAbs);
    boolean resultContains = carsWithAbs.contains(data.get(0));
    assertTrue(resultContains);
    verify(connectionContains, times(1)).close();

    boolean resultDoNotContain = carsWithAbs.contains(data.get(1));
    assertFalse(resultDoNotContain);
    verify(connectionDoNotContain, times(1)).close();
  }
  @Test
  public void testNotifyObjectsCleared() throws Exception {

    // Mock
    ConnectionManager connectionManager = mock(ConnectionManager.class);
    Connection connection = mock(Connection.class);
    Connection connection1 = mock(Connection.class);
    Statement statement = mock(Statement.class);
    Statement statement1 = mock(Statement.class);

    // Behaviour
    when(connectionManager.getConnection(any(SQLiteIndex.class)))
        .thenReturn(connection)
        .thenReturn(connection1);
    when(connectionManager.isApplyUpdateForIndexEnabled(any(SQLiteIndex.class))).thenReturn(true);
    when(connection.createStatement()).thenReturn(statement);
    when(connection1.createStatement()).thenReturn(statement1);

    @SuppressWarnings({"unchecked", "unused"})
    SQLiteIndex<String, Car, Integer> carFeaturesOffHeapIndex =
        new SQLiteIndex<String, Car, Integer>(
            Car.FEATURES, OBJECT_TO_ID, ID_TO_OBJECT, connectionManager);

    carFeaturesOffHeapIndex.clear(new QueryOptions());

    // Verify
    verify(statement, times(1))
        .executeUpdate(
            "CREATE TABLE IF NOT EXISTS "
                + TABLE_NAME
                + " (objectKey INTEGER, value TEXT, PRIMARY KEY (objectKey, value)) WITHOUT ROWID;");
    verify(statement, times(1))
        .executeUpdate(
            "CREATE INDEX IF NOT EXISTS " + INDEX_NAME + " ON " + TABLE_NAME + " (value);");
    verify(connection, times(1)).close();

    verify(statement1, times(1)).executeUpdate("DELETE FROM " + TABLE_NAME + ";");
    verify(connection1, times(1)).close();
  }