Ability to specify a x:context for a x:call

[GoogleCodeExporter]

In my XSLT I have an xsl:key declaration at a global level. This key is built 
from the source document.

I later have a recursive named function which call's key() which I would like 
to test. I need to be able to set an x:context so that I can mock the data that 
the xsl:key is built from.

I can use x:call to call my function, but also using x:context in combination 
x:call is prohibited by XSpec. I think this needs to be relaxed.

Original issue reported on code.google.com by [email protected] on 25 Feb 2014 at 3:38

[yamahito]

+1 duplicated in #66 ?

[markdunnoup]

Not a duplicate of #66 - the key is created (or fails to be created) before the context is set.
It needs something similar to how XSpec deals with global variables, i.e. overriding them with <x:param>