XMLRPCTestTransport appears to be broken

[mgedmin]

I noticed this while reading the source code while working on #14, so this is a purely theoretical bug report: XMLRPCTestTransport.request() has this line of code in it:

response = http(request, handle_errors=self.handleErrors)

but the http() function defined at the top level of the same module has this signature:

def http(wsgi_app, string, handle_errors=True):

Thus XMLRPCTestTransport cannot possibly work.

[icemac]

In 262d9b9 the signature of http() was changed. I used to get the wsgi_app from the WSGILayer before. But this was a too tight coupling.

[icemac]

After thinking the issue over: I'd suggest to delete the XMLRPC support code here and use the one from zope.app.publisher which also defines the XMLRPC view ZCML directive. I see no way to add tests here without adding a dependency on zope.app.publisher.

[icemac]

This is already prepared in zopefoundation/zope.app.publisher#8, but still has to be used here.