Include Concise Bounded Description example in the tests for Graph.cbd

[aucampia]

From a brief glance at Graph.cbd I'm unsure if it will be able to reproduce the example from the Concise Bounded Description definition, but regardless this example should be included in our tests so we can be sure it passes.

[ms1901]

Hello @aucampia,
I am working on solving this.

[ghost]

From a brief glance at Graph.cbd I'm unsure if it will be able to reproduce the example from the Concise Bounded Description definition, but regardless this example should be included in our tests so we can be sure it passes.

Yes Graph.cbd() does reproduce the example (I've elided the actual RDF/XML inputgraph and expectedgraph data) as far as isomorphic is concerned ...

def testcbd_example():

    g = Graph()
    g.parse(data=inputgraph, format="xml")

    result = g.cbd(URIRef("http://example.com/aReallyGreatBook"))
    expected = Graph().parse(data=expectedgraph, format="xml")

    assert isomorphic(result, expected)

And I can confirm the test result via using my implementation of the DigitalBazaar URDNA canonicalizer:

    canonicalized_expected = expected.serialize(format="rdna")
    canonicalized_result = result.serialize(format="rdna")

    assert canonicalized_expected == canonicalized_result

So Graph.cbd() seems to be working as one would expect.