Mutation testing with Pitest

by GarciaPL on Saturday, 2 July 2016

Some of you might be interested in presentation which I made recently for internal training purpose. Topic is "Mutation testing with Pitest".

Face Slim - light Facebook for Android phones

by GarciaPL on Saturday, 18 June 2016

If you are trying to speed up your Android phone, you should consider uninstalling Facebook! You can read more about that phenomenon for instance here : To be honest my phone is much faster after removing Facebook.

After uninstalling Facebook, you might looking for replacement. There is a application called Face Slim [1]. Maybe it is not perfect, but if you only view posts on Facebook and put comment occasionally, it might be totally fine.

Recently I installed this application on Samsung Galaxy S3. After running it, I found that I am not able to login due to bad rendering of login screen [2]. Only what you need to do, is clearing UA (User Agent) settings in application.

Reference :

Guava Enum Mapper

by GarciaPL on Monday, 23 May 2016

Have you ever wondered how to map enums from one to another ? Did you use switch statement to make it work ? Now you can use method immutableEnumMap from class Maps which is part of Guava. Below you can find an example.

public class EnumSourceMapper {

    static ImmutableMap<EnumSource, EnumDestination> mapper;

    static {
        mapper = Maps.immutableEnumMap(ImmutableMap.<EnumSource, EnumDestination>builder()
                .put(EnumSource.SUCCESS,                  EnumDestination.SUCCESS)
                .put(EnumSource.INCOMPLETE,               EnumDestination.ERROR)
                .put(EnumSource.FAIL,                     EnumDestination.ERROR)

    public EnumDestination getEnumDestination(EnumSource enumSource) {
        return mapper.get(enumSource);


EuroMonitor - get email notification about currency

by GarciaPL on Monday, 9 May 2016

Recently I was trying to convert some cash in EUR currency, but I did not have time to watch currency graph all the time. So, I have created small tool which will let me know via email when currency will get more expensive above some concrete level. You can put below script in cron to execute it with some time interval. I used Sparkpost as a email provider.

import urllib2
import json
from sparkpost import SparkPost

sp = SparkPost('YOUR_API_KEY')

def currencyConverter(currency_from,currency_to):
    yql_base_url = ""
    yql_query = 'select%20*"'+currency_from+currency_to+'")'
    yql_query_url = yql_base_url + "?q=" + yql_query + "&format=json&"
        yql_response = urllib2.urlopen(yql_query_url)
            yql_json = json.loads(
            currency_output = 1 * float(yql_json['query']['results']['rate']['Rate'])
            return currency_output
        except (ValueError, KeyError, TypeError):
            return "JSON format error"

    except IOError, e:
        if hasattr(e, 'code'):
            return e.code
        elif hasattr(e, 'reason'):
            return e.reason

currency_from = "EUR" # currency codes :
currency_to = "PLN"
direction_rate = 4.44

rate = currencyConverter(currency_from,currency_to)
print rate

if rate > direction_rate:
 response = sp.transmissions.send(
     html='Rate of ' + currency_from + currency_to + ' equals ' + str(round(rate, 2)) + '
', from_email='', subject='EuroMonitor' ) print(response) else: print "Rate too low"

Reference :
[1] EuroMonitor Source Code

Spring Test DBUnit - Table already exists

by GarciaPL on Saturday, 16 April 2016

I had a chance to work with Spring Test DBUnit [1] (integration between Spring testing framework and DBUnit) with few tests related with Spring Integration. Most of them use the same common text context which contains embedded database H2. Funny thing was that some tests failed, because of some tables already exist. The issue is that embedded database is not cleared between tests and it is reused within the same context. That's why you should use @DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS) with @TestExecutionListeners({DependencyInjectionTestExecutionListener.class, DirtiesContextTestExecutionListener.class}) like below :

@TestExecutionListeners({DependencyInjectionTestExecutionListener.class, DirtiesContextTestExecutionListener.class})
@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS)
public class YourTest {


Reference :
[1] Spring Test DBUnit

[2] Spring Framework - DirtiesContext


by GarciaPL on Thursday, 31 March 2016

I would like to announce that new Android app has been released recently times by me. This time application is called PerlJobs. This application helps you as a Perl developer to find new job opportunities across the globe. Job offers are divided into sections : Standard, Mod, Catalyst, Mason, Telecommute and By Country. The main source of all jobs is website :