[on hold] Trying to add unit test for sparql-update

[michielbdejong]

This PR adds a unit test that fails. The error seems to come from: https://github.com/linkeddata/rdflib.js/blob/master/src/n3parser.js#L810

Followed by: https://github.com/linkeddata/rdflib.js/blob/master/src/patch-parser.js#L70

res2[0] there is an IndexedFormula containing the triple that was inserted, but it's being used as the object in a triple of the form <query> snqs:insert [IndexedFormula]. I think the intention of this code must have been to insert a list or a collection or a blank node or something there.

I'll delve into the git history because I'm pretty sure this did work last year.

[michielbdejong]

The error

Object {<https://example.com/#s> <https://example.com/#p> <https://example.com/#o> .} is not an object type

is probably thrown from https://github.com/linkeddata/rdflib.js/blob/master/src/store.ts#L433

[michielbdejong]

Indeed, if you update NSS to the latest RDFLib.js, it breaks 85 tests, including:

21) PATCH
       with insert
         on a non-existing file
           has "Patch applied successfully" in the response:
     AssertionError: expected 'Patch document syntax error: Error: Error: Object {<https://tim.localhost:7777/x> <https://tim.localhost:7777/y> <https://tim.localhost:7777/z> .} is not an object type while trying to parse <https://tim.localhost:7777/new.ttl#patch-9f1fb311b57c6601db19f09bc4bb597f> as text/n3\n' to include 'Patch applied successfully'
      at Function.assert.include (node_modules/chai/lib/chai/interface/assert.js:843:45)
      at Context.<anonymous> (test/integration/patch-test.js:462:16)
      at processImmediate (internal/timers.js:439:21)

[michielbdejong]

So is this valid in NT?

{
  <https://example.com/#query>
  <http://www.w3.org/ns/pim/patch#insert> {
    <https://example.com/#s>
    <https://example.com/#p>
    <https://example.com/#o> .
  } .
}

Because it's what the sparlqUpdateParser tries to add to the store in https://github.com/linkeddata/rdflib.js/blob/master/src/patch-parser.js#L70, and the store chokes on it at https://github.com/linkeddata/rdflib.js/blob/master/src/store.ts#L433.