[cairo] [PATCH] test: Always use DejaVu Sans as default font

[Lawrence D'Oliveiro]

On Mon, 6 Jul 2015 14:24:54 -0700, Bryce Harrington wrote:

> On Thu, Jul 02, 2015 at 11:52:15AM +0200, Andrea Canciani wrote:
>
>> On Thu, Jul 2, 2015 at 12:05 AM, Lawrence D'Oliveiro <
>> ldo at geek-central.gen.nz> wrote:
>> 
>>> On Wed,  1 Jul 2015 12:00:49 +0200, Andrea Canciani wrote:
>>>
>>>> This change should not affect Linux environments, assuming that
>>>> the default font is already set to "DejaVu Sans".
>>>
>>> On Linux environments, I would expect to see Fontconfig in use.
>>> This can take a generic name like “Sans Serif” and map it to
>>> whatever font the user desires.
>> 
>> Yes, but (for the test suite) if this happens you are likely already
>> getting failures when you test cairo, because unless the
>> user-chosen font glyphs have the same shape as the DejaVu Sans
>> ones, the output of the test cases will not match the reference.
>> Please notice that most tests already set the font to
>> CAIRO_TEST_FONT_FAMILY " ...".
> 
> Right, for the test suite, there is no user to have desires.  :-)
> Goal is to just make sure results match up to the references.

However, even a specific-sounding name like “DejaVu Sans” can be
remapped by Fontconfig. If a test suite can be led astray by vagaries
of user configuration, then isn’t that a bug in the test suite?

If you want to depend on a specific font in the test suite, then the
font needs to be included in the test suite.