DOMEntityResolverTest0 as originally written appeared to test the parameters 
on a call to resolveResource. The document being parsed did not have any 
external resources and resource resolvers do not participate in resolving the 
document entity, so resolveResource should not and was not invoked and the 
assertions were never evaluted.

I have rewritten DOMEntityResolverTest0 so that it parses a document with an 
external entity with an resource resolver.  The resourceResolver checks the 
parameters and replaces the external resource.  The test checks the document 
after parsing to check that the resolver was effective.

DOMEntityResolverTest2 was added to test that a resource resolver is not used 
to resolve the document entity.