layout	title	folder	permalink	categories	language	tags
pattern	Object Mother	object-mother	/patterns/object-mother/	Creational	en	Instantiation

Object Mother

Define a factory of immutable content with separated builder and factory interfaces.

Class diagram

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 to the stackoverflow question: What is an ObjectMother?
• c2wiki - Object Mother
• Nat Pryce - Test Data Builders: an alternative to the Object Mother pattern