Issues with test cases

[chrdebru]

• 0000 relies on a UUID function, but that always yields a different result
• Tests still rely on old representations of sources
• should the rml:constant "name" ; in 0002 not be changed to rml:reference "name" ; The test description states that it tests whether the "false reference" is caught, but the test uses a constant and I do not see what is wrong with this mapping. The spec does not specify that constant expression maps are not allowed for input value maps.
• Is id-lab:toUpperCaseURL a good function for test case 0004? It is underspecified and it does not play nicely with the usual behavior of trying to generate an absolute IRI. I would have understood it the test data contained a IRI, but the test case now assumes that the values is put next to http://
• http://VENUS is not a valid absolute IRI
• Ibid for 0005
• 0006 -> the function adds http:\\ (lower case) when it is missing, but transforms http:// into HTTP:// when it is provided.
• We should have a variant with rml:return other than the nested function call. Maybe 0001?

[chrdebru]

I proposed a PR for the second issue.

[bjdmeest]

I fixed the third issue in #37

[bjdmeest]

Added a suggestion for the first issue in #38 , but in this stage I prefer not to replace existing test cases but rather create more if it's an alternative instead of a bugfix, hence the 0000b

[bjdmeest]

made a suggestion for the 4th and 5th issue in #39

[bjdmeest]

made a suggestion for the 6th issue in #40

[bjdmeest]

made a suggestion for 7th issue in #41

[bjdmeest]

added test case 0010 for last issue in #42

[chrdebru]

All looks good. There is just one problem with 0010 --> it fails the shape files.

        rml:objectMap [
            rml:functionExecution <#Execution> ;
            rml:returnMap [
                rml:constant fns:domainOutput
            ]
        ]

But:

Node=_:B2b96fcbd08ae031e639d8d104ab45f88
  Path=(((<http://w3id.org/rml/template>|<http://w3id.org/rml/constant>)|<http://w3id.org/rml/reference>)|<http://w3id.org/rml/returnMap>)|<http://w3id.org/rml/functionExecution>
  Message: 
        Exactly one rml:template, one rml:constant, one rml:reference,
        one rml:returnMap, or one rml:functionExecution is required.

And this one has both a returnMap and rml:FunctionExecution.