[Qgis-developer] rendering tests, what's the latest approach ?

[Nyall Dawson]

On 13 November 2015 at 02:42, Matthias Kuhn <matthias at opengis.ch> wrote:
> Simple answer: don't use rendering tests and find other means to check
> it ;-)

Hmm... for something like this (testing rendering of a line style), I
think a rendering test is perfectly acceptable! It's only when
rendering tests are used for things like checking geometry operations
that it's an issue IMO.

Nyall


>
> If you still need, use the MultiRenderChecker, it is based on the
> RenderChecker but adds more possibilities for anomalies. At least that's
> the latest state of rendering tests I'm aware of...
>
> Best
>
> On 11/12/2015 04:37 PM, Sandro Santilli wrote:
>> I've found a bug in rendering line-offsetted marker line symbols [1]
>> and wondering what's the currently recommended way to add a testcase.
>>
>> [1] http://hub.qgis.org/issues/13811 or
>>     https://github.com/qgis/QGIS/pull/2442
>>
>> Looking around I see many test files using the QgsRenderChecker
>> class in tests/src/core but the rationale is not clear to me.
>>
>> Here's the list:
>>
>>    regression992.cpp
>>    testqgsblendmodes.cpp
>>    testqgscomposerobject.cpp
>>    testqgscomposerutils.cpp
>>    testqgsdiagram.cpp
>>    testqgsgeometry.cpp
>>    testqgsgradients.cpp
>>    testqgsimageoperation.cpp
>>    testqgsinvertedpolygonrenderer.cpp
>>    testqgslabelingenginev2.cpp
>>    testqgslegendrenderer.cpp
>>    testqgslinefillsymbol.cpp
>>    testqgsmaprenderer.cpp
>>    testqgsmaprotation.cpp
>>    testqgspainteffect.cpp
>>    testqgspointpatternfillsymbol.cpp
>>    testqgsrasterfill.cpp
>>    testqgsrasterlayer.cpp
>>  * testqgsrenderers.cpp
>>    testqgsshapeburst.cpp
>>
>> Then other files use the QgsMultiRenderChecker class instead:
>>
>>    qgscompositionchecker.cpp
>>    testqgsblendmodes.cpp
>>    testqgsdiagram.cpp
>>    testqgsinvertedpolygonrenderer.cpp
>>    testqgspainteffect.cpp
>>    testqgsrasterfill.cpp
>>    testqgsrenderers.cpp
>>    testqgsshapeburst.cpp
>>  * testqgsstylev2.cpp
>>  * testqgssymbolv2.cpp
>>
>> What's the difference between the two classes ?  Which one should I use ?
>> Should I put the new case in any existing file ?
>> (I've tagged the possible candidates with a star)
>>
>> --strk;
>>
>>   ()   Free GIS & Flash consultant/developer
>>   /\   http://strk.keybit.net/services.html
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>
> --
> Matthias Kuhn
> OPENGIS.ch - https://www.opengis.ch
> Spatial • (Q)GIS • PostGIS • Open Source
>
>
>
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