Hi,
I am having trouble with integration tests that I am writing in a Python
plugin. The tests run correctly one at a time, but when I run them together
only the first test works correctly. It seems that changes it makes to the
database are still present in the later tests. How can I make sure that the
vector layer / database is fully reset between tests?
My tests are based on unittest.TestCase. The QGIS app is started with
QGISAPP.initQGIS() as in the main QGIS tests and a Mock iface is used.
In the setUp, I make a temporary copy of a template spatialite file and run an
SQL script on it to add features and other data. I connect to the database and
store a reference to it (self.db). Then I load one of the tables as a
QgsVectorLayer and store a reference to it (self.esu).
The first test uses self.esu.dataProvider().deleteFeatures() to remove
features, the second uses self.esu.dataProvider().addFeatures() to add
features. They check that the features have been added and that other database
changes have been made.
The teardown contains the following:
if self.db: # Just in case self.db doesn't get set
self.db.close()
del self.db
QSqlDatabase.removeDatabase('integration_testing')
self.esu = None
reg = QgsMapLayerRegistry.instance()
reg.removeAllMapLayers()
reg.clearAllLayerCaches()
if os.path.exists(self.test_db_path):
os.remove(self.test_db_path)
I thought that this would be enough to reset any references to the vector
layer, but if I delete a feature in the first test, it is still gone when I run
the second test. Is QGIS holding any other references to the layers that I
have missed?
Cheers
John
John Stevenson
Senior Developer
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