advapi32/tests: Add tests for RegSetValueExW and RegQueryValueExW.

[Alexandre Julliard]

Jactry Zeng <jactry92 at gmail.com> writes:

> 2017-07-10 17:32 GMT+08:00 Alexandre Julliard <julliard at winehq.org>:
>>
>>
>> That's also tested already, in test_hkey_main_Value_A/W.
>>
> Aha! Yes, you are right. That was tested.
> So RegQueryValueExW will not add a NULL terminator all the time, 
> and setting a length with NULL terminator for RegSetValueExW is necessary
> when using a same buffer for many RegQueryValueExW call.

In general it would be more robust to check the length from
RegQueryValueExW. Fixing the setting side doesn't guarantee anything
since it could be changed by some other piece of code.

-- 
Alexandre Julliard
julliard at winehq.org