Investigate automated test suite generation based on JSON

[behrtam]

Shouldn't be that complicated to write an automated test suite generator which uses the *.json file from the x-common repo. This could make the initial work for implementing new exercises easier.

See https://github.com/exercism/todo/issues/8

[kytrinyx]

The tricky thing is that the format isn't necessarily consistent yet (and we don't know if it should be). But there might be a small handful of formats, which would definitely help.

[behrtam]

The inconsistent format should be a thing of the past: exercism/problem-specifications#602

[stale]

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