test: derived and unsettable of spoon.metamodel.Metamodel

[pvojtechovsky]

The values of derived and unsettable attributes of MetamodelProperties of MetamodelConcepts of spoon.metamodel.Metamodel are compared to the hardcoded expected values

It is a way how to fix #2047

[monperrus]

A) to move hardcoded metamodel from #1686 to test package and to change it manually in case of real change of spoon metamodel. This let's us write a test which checks whethere these two metamodels are equal.
B) To persist the metamodel somehow and commit the persisted representation into git. Then tests can check if metamodel is equal like persisted version

Both are fine if if have a test.

The problem in this PR is:

static class Type
static class Field

which are duplicate of MetamodelConcept and MetamodelProperty (hard to understand, hard to maintain).

Is it possible to direclty use MetamodelConcept and MetamodelProperty instead?

[pvojtechovsky]

Is it possible to direclty use MetamodelConcept and MetamodelProperty instead?

I think no. The purpose of this PR is to make a snapshot of the Metamodel state. So we need a duplicate structure, which represents that snapshot. May be we can make that test Metamodel package protected so nobody can use that duplicated structure.

[monperrus]

Now, I understand, LGTM.

• we need to revolve conflicts
• do we check that all properties are hard-coded?