Testing database content with DBUnit. My experience

Can you test database layer more smart than usual?

Serhii KartashovDecember 2012SoftServe

Agenda

What’s a problem?

How we want to resolve that?

Are you professional?

Agenda

What’s a problem?

How we want to resolve that?

Are you professional?

Problem

Task:

please remove old and didn’t marked data from production!

The problem is this:

you have a SQL database, some stored procedures, and a layer of code sitting between your application and the database. How can you put tests in place to make sure your code really is reading and writing the right data from the database?

What’s the best practice? You need [multiple] databases!

Aster

SQL Oracle

MySQL

Aster

Oracle

MySQL

Aster

Oracle

MySQL

devQA (local) prodQA production

How I wanted to do that? First step: initialization test data.

con.

Prepare the data

object file network

SQL commit

First step: create the Test and call API.

How I wanted to do that? First step: initialization test data.

con

.

Actual Data

DB

SQL

Expected Data

Compare

Agenda

What’s a problem?

How we want to resolve that?

Are you professional?

Ideal schema

DB DBDB

Initialize call API Actual dataExpected

data

Compare

Step 1 Step 2 Step 3

File

File

Agenda

What’s a problem?

How we want to resolve that?

Are you professional?

DBUnit Framework

DBUnit Core Components

• IDatabaseConnection - interface representing a DbUnitconnection to a DB

• IDataSet - interface representing a collection of tables• DatabaseOperation - abstract class representing an operation

performed on the database before and after each test. Operations:

• NONE• UPDATE• INSERT• REFRESH• DELETE• DELETE_ALL• TRUNCATE_TABLE• CLEAN_INSERT (DELETE_ALL and INSERT)

IDatabaseConnection

IDataSet: database

DataBase

client_id item_id item_name

analytics_comments

client_id item_id item_name

200 01 name - #1

200 02 name - #2

200 03 name - #3

IDataSet: XML file Initialized

Expected

Database Operation: setUp()

Simple JUnit test

A bit more

Supported RDBMS

• OracleDatabase• MsSQL• MySQL• IbmDB2• IbmInformix• H2• HypersonicSQL• PostgreSQL• SybaseSQL• InterBase• OpenBase8• SapDB/MaxDB• Derby• FrontBase

Where is Aster database???

NOTE: 1. latest version of DBUnit framework doesn’t support Oracle Schemas…2. and very inert community…

Thank you!

Questions?