- for algorithms that produce directory output, it is possible to test
that directory contents are exactly the same (recursively)
- added possibility to have a project file loaded before an algorithm is run
- documented the new additions (+ few existing ones)
This is useful when an algorithm returns features in no particular order
and sorting features by attributes does not help because there may be
features with the same attributes, giving non-unique sorting orders.
This is useful with geometry algorithms when the order of the coordinates of produced
geometries does not need to be exactly the same every time, but the output is still
topologically equivalent.
The GML format often requires extra 'hand holding' in order to
get QGIS to detect it's CRS (e.g. GML files created directly
in GDAL will not have an autodetected CRS when pulled into
QGIS). This needs fixing, but as a workaround to allow
processing algorithm porting to continue we can now skip
the crs check for these layers.
processing tests
Some algorithms will return results in different orders, e.g.
due to the use of dicts or other methods which do not guarantee
a fixed return order.
Using a primary key to do the feature match allows us to flexibly
handle these situations and provide tests for these algorithms.
All pointer based methods have been removed.
Now we have only:
void setGeometry( const QgsGeometry& geom )
and
QgsGeometry geometry() const
Benefits include avoiding a whole lot of tricky pointer lifetime
issues, potential memory leaks, and finally closing #777, which
has survived for over 9 years!...
Impacts on PyQGIS code:
- no more need for the messy
g = QgsGeometry( feature.geometry() )
workaround, just use g = feature.geometry() instead
- IMPORTANT: you can no longer test whether a feature has geometry
using `if f.geometry():`, since QgsFeature::geometry() will
*always* return an object. Instead, use
`if not f.geometry().isEmpty():`, or preferably the new method
`if not f.hasGeometry():`
Fix#777
