[GRASS-dev] [GRASS GIS] #2269: r.univar silent instead of NaN

[GRASS GIS]

#2269: r.univar silent instead of NaN
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 Reporter:  neteler      |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  6.4.4                    
Component:  Raster       |     Version:  svn-releasebranch64      
 Keywords:  r.univar     |    Platform:  Unspecified              
      Cpu:  Unspecified  |  
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Comment(by wenzeslaus):

 The same applies for `r3.univar`.

 It is especially bad for `-g` flag where module is used as a part of
 something bigger and the caller expects valid output when module ended
 with non-zero return code. Now it can end in the best case report and
 empty output when expecting something but no better error message can be
 provided.

 See also testing framework
 ([https://trac.osgeo.org/grass/browser/grass/trunk/lib/python/gunittest/case.py?rev=61459#L154
 gunittest]) where `r.univar` and `r3.univar` are used to check map
 properties and thus some informative error messages needs to be provided
 when something is wrong. See particularly r61459.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2269#comment:3>
GRASS GIS <http://grass.osgeo.org>