# \[ref\_impl\_eiffel\] \[970\] Add postconditions and unit test assertions demonstrating that a new minimal differential archetype was created in an invalid state .

**URL:** <https://discourse.openehr.org/t/ref-impl-eiffel-970-add-postconditions-and-unit-test-assertions-demonstrating-that-a-new-minimal-differential-archetype-was-created-in-an-invalid-state/13441>\
**Category:** Reference Implementation: Eiffel (archive)\
**Created:** [29 June 2010 01:05 UTC](https://discourse.openehr.org/t/ref-impl-eiffel-970-add-postconditions-and-unit-test-assertions-demonstrating-that-a-new-minimal-differential-archetype-was-created-in-an-invalid-state/13441 "2010-06-29T01:05:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![svn1](https://discourse.openehr.org/letter_avatar_proxy/v4/letter/s/958977/32.png) [@svn1](https://discourse.openehr.org/u/svn1)\
**Post date:** [29 June 2010 01:05 UTC](https://discourse.openehr.org/t/ref-impl-eiffel-970-add-postconditions-and-unit-test-assertions-demonstrating-that-a-new-minimal-differential-archetype-was-created-in-an-invalid-state/13441/1 "2010-06-29T01:05:20Z")

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Revision: 970  
Author: peter.gummer  
Log Message: