def METHOD_NAME(establish_connection):
    conn, db = establish_connection
    result = conn.execute("RETURN BLOB('\\\\xAA\\\\xBB\\\\xCD\\\\x1A')")
    assert result.has_next()
    result_blob = result.get_next()[0]
    assert len(result_blob) == 4
    assert result_blob[0] == 0xAA
    assert result_blob[1] == 0xBB
    assert result_blob[2] == 0xCD
    assert result_blob[3] == 0x1A
    assert not result.has_next()
    result.close()