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

[Matthias Kuhn]

Simple answer: don't use rendering tests and find other means to check
it ;-)

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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