Simplify (junit) testing in cayenne
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Key: CAY-862
URL: https://issues.apache.org/cayenne/browse/CAY-862
Project: Cayenne
Issue Type: New Feature
Components: Cayenne Core Library
Affects Versions: 3.0
Environment: All
Reporter: Marcin Skladaniec
Assignee: Andrus Adamchik
Junit tests are becoming very important once the project reaches a certain point. Cayenne has dozens of junit tests but writing a junit test for cayenne based application is not easy at all.
For me the main trouble is when there is no need to fetch or commit something (like testing GUI or lifecycle events). I tried to reproduce the tests found in cayenne,but always ended up with problems with mocking up the context, datachannel, entityResolver, altering the configuration to point to different db etc.
To solve that my idea was that one might specify a package in the CayenneModeler, this package will than be populated with generated a set of _MockupXXX extends XXX (like _MockupArtist extends Artist, _MockupPainting extends Painting etc.) and a MockupDataContext etc. There could be a second set of _MockupEntities for ROP client.
Another thing is to specify the testing environment with ease. I think there should be also a possibility to create a "testing" DataNode pointing to a different database than deployment, and for the DataMap could be related to the real or testing DataNode at the same time. To choose the testing environment a system param like -Dcayenne.testing=TRUE could be utilised.
I might have missed something here: is there a simply way of having two DataNodes for one DataMap ?
I think that simplified testcase writing feature would be a great advantage for Cayenne over any other ORM.
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