Testing Polyglot Persistence Done Right

Alex Soto @alexsotob

Bartosz Majsak@majson

●Open source advocate● lordofthejars.com curator●Father

[alex@geecon ~]$ whoami

@alexsotob lordofthejars

●Java Developer by day●Open source junkie by night●Conference speaker by passion

[bartek@geecon ~]$ whoami

@majson bartoszmajsak

FIRST things first

Fast Run more oftenIsolated Can be executed in any orderRepeatable Always return the same resultSelf-Validating Know exactly their purposeTimely Run before code

Frequently omitted rules

in Persistence tests

FAST

Fast

FAST

Network access

Long bootstrap

Humongous amount of data

FAST

HSQLDB

MongoDB (fongo)

Neo4J

Cassandra

Infinispan

HBase

Isolation

ISOLATION

public class BeerRepositoryTest {

BeerRepository beerRepository;

@Test public void should_persist_beer() { beerRepository.save(new Beer(“Mocny Full”)); }

@Test public void should_count_beers() { int beers = beerRepository.count(); assertThat(beers).isEqualTo(??); }

}

ISOLATION

DBUnit

Unitils

NoSQLUnit

Arquillian Persistence Extension

Plain Old SQL World

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FIRST ATTEMPT

FIRST ATTEMPT

FIRST ATTEMPT

FIRST ATTEMPT

<dataset> <brewery id="1" name="Brew Dog" country="Scotland" /> <beer id="1" name="End of History" price="756" alcohol="55.0" brewery_id="1" /></dataset>

We can do better

And even better

Hipster’s world of NoSQL

Trending Topic

Why NoSQL?

Why NoSQL?

Clustering from scratch

“Schemaless”

Polyglot

More Natural for Developer

Manage Lifecycle

Maintain Database State

Polyglot Persistence

Spring Data Support

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Not a single point of access

Supported Engines

MongoDB

CouchDB

Elasticsearch

Neo4j

Redis

Infinispan

HBase

Cassandra

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Starting/Stopping Databases

Manging MongoDB Lifecycle

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Seeding Database with the Known Data

Seeding Database with Known Data

Demo Time

Arquillian

TITLE Integration

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Containers

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Deployments

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@RunWith(Arquillian.class)public class FluidOunceConverterTestCase {

@Deployment public static JavaArchive createDeployment() { return ShrinkWrap.create(JavaArchive.class, "test.jar") .addClasses(FluidOunceConverter.class,

FluidOunceConverterBean.class); }

@Inject FluidOunceConverter converter;

@Test public void should_convert_fluid_ounces_to_millilitres() { // given double ouncesToConvert = 8d; double expectedMillilitres = 236.588237d;

// when double ouncesInMl = converter.convertToMillilitres(ouncesToConvert);

// then assertThat(ouncesInMl).isEqualTo(expectedMillilitres); }

}

Demo Time

●You can write your test fixtures in XML, Excel, YAML or JSON

●@UsingDataSet / @ShouldMatchDataSet

●@Cleanup / @CleanupUsingScript

●@ApplyScriptBefore / After

●@CreateSchema

●JPA 2nd level cache eviction

Demo Time

●Standalone mode

●Scriptable data sets

●Full NoSQLUnit integration

●Schema validation

FUTURE