Add validation tests

[TG1999]

Add tests for validating each PURL type.

• Fixes: purl-next: Extend syntax validation for PURL aboutcode-org/purl-spec#47

[pombredanne]

@TG1999 Thanks! these should be combined in each of the existing JSON files... for instance, for tests/types/conda-validation-tests.json, merge these in https://github.com/package-url/purl-spec/blob/main/tests/types/conda-test.json

And when doing so, please make sure there is no duplicate... you also need to conform to the new schema.

[matt-phylum]

Are implementations really expected to produce exactly these text messages?

[pombredanne]

@matt-phylum re:

Are implementations really expected to produce exactly these text messages?

good point. I have mixed feeling on that alright. One part of me says it would be really nice to have the same validation error messages everywhere. One part of me says it is not critical and may put too much burden on authors. What is your preference?

[pombredanne]

@TG1999 Thanks! see comments for your review.

[mjherzog]

@pombredanne @TG1999 We should have an issue to discuss and approve the change to purl-test-schema.json before we apply any other changes. I will draft an Issue based on the limited information in this PR.