igeligel 3a9d1684fd Initial commit of the object mother #498
Add a simple king and queen classes which implement the behaviour of the
royalty interface. Also wrote the object mother of royalty objects which
is final so you can just call the static methods in it to create objects
with a specific state to use them fast in tests. The tests are already
created for testing the behaviour and the type of the objects which are
created by the object mother.
I also created the UML diagrams via object aid and updated the readme.
2016-10-04 22:33:06 +02:00

31 lines
953 B
Markdown

---
layout: pattern
title: Object Mother
folder: object-mother
permalink: /patterns/object-mother/
pumlid:
categories: Creational
tags:
- Java
- Difficulty-Beginner
---
## Object Mother
Define a factory of immutable content with separated builder and factory interfaces.
![alt text](./etc/object-mother.png "Object Mother")
## Applicability
Use the Object Mother pattern when
* You want consistent objects over several tests
* you want to reduce code for creation of objects in tests
* every test should run with fresh data
## Credits
* [Answer by David Brown](http://stackoverflow.com/questions/923319/what-is-an-objectmother) to the stackoverflow question: [What is an ObjectMother?](http://stackoverflow.com/questions/923319/what-is-an-objectmother)
* [c2wiki - Object Mother](http://c2.com/cgi/wiki?ObjectMother)
* [Nat Pryce - Test Data Builders: an alternative to the Object Mother pattern](http://www.natpryce.com/articles/000714.html)