More tests and custom datatypes

[enikao]

Added Sorted variants of SerializedNode et al. to make comparison easier in tests.

Added more tests:

• JSON <-> M3
• JSON <-> SLanguage

Should fix #42, #43

[enikao]

@woppa684 Does this address your issues?

[enikao]

@ftomassetti Maybe we want to move the Sorted classes to LW-Java?

[woppa684]

@woppa684 Does this address your issues?

Hard to tell, I don't really know how to review these changes. Any suggestions?

[enikao]

@woppa684 Does this address your issues?

Hard to tell, I don't really know how to review these changes. Any suggestions?

Check out the branch locally, or look at the serialized examples (e.g. https://github.com/LIonWeb-org/lioncore-mps/pull/49/files#diff-6941bbdb05685ade5b0849ee331d4c20c14de0e2c0f88bdd2d119a04b8b16029 )

[ftomassetti]

@ftomassetti Maybe we want to move the Sorted classes to LW-Java?

Do you mean SortedSerializedNode and the siblings?
Are they used to facilitate comparisons? Or for something else?

If they are use to facilitate comparisons, for that I have a class to perform comparison (ModelComparator) but I do that at the node level, not at the SerializedNode level.
Why do we need to do that to the SerializedNode level?

[enikao]

If they are use to facilitate comparisons, for that I have a class to perform comparison (ModelComparator) but I do that at the node level, not at the SerializedNode level. Why do we need to do that to the SerializedNode level?

Fits better how I handle stuff inside MPS -- I mostly work with SerializedNodes.