[PATCH] msxml3/tests: Add mxwriter DOMDocument test.

[Nikolay Sivov]

On 1/20/21 2:15 AM, Jefferson Carpenter wrote:
> Let me know what you think about this test.
>
> I could add a double for loop to check over the whole Cartesian
> product of CLSID_MXXMLWriter* and CLSID_DOMDocument* structs.
>
> P.S. We'll see what Marvin has to say about this.  (If Marvin rejects
> it, which he probably will, I'll check support data).
I think the question is whether MXWriter explicitly supports document
for output, or if it's simply a case of document not exposing IStream,
see [1].

[1] https://bugs.winehq.org/show_bug.cgi?id=4811
<https://bugs.winehq.org/show_bug.cgi?id=4811>