Export test function

[rom1504]

Would be interesting to somehow export the test functions to make it easy to add tests for protodef users (to add tests for https://github.com/PrismarineJS/node-minecraft-protocol/blob/master/src/datatypes/minecraft.js )

follows #54

[rom1504]

I see 2 ways to do this:

1. put the test function in its own package (and repo I guess)
2. add jsonschema as a dependency to protodef (it's pretty small and has no dependencies) and add the test function in lib/ and expose it as part of protodef

The second way seems simpler. I might use jsonschema to provide validation functionality anyway (#46 (comment) )

[rom1504]

I think stuff would be clearer if an other implementation would be started (#59) because it would requires to depend on an interlanguage repo containing the json tests.

Is it okay for an implementation to provide its own test suite or should it be independent ?

[rom1504]

I like the way this org is organized https://github.com/JSONScript/jsonscript-test-suite

[rom1504]

well this is long done.