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Usually QObjects must subclass and override methods like focusOutEvent to handle focus events. Using this class as an event filter avoids the need to subclass objects and the focus events can be directly caught using the emitted signals.
QGIS unit tests
Build tests
Make sure that you have enabled building of tests in CMake.
cmake -DENABLE_TESTS=ON ..
Run tests
You can run all tests using make check.
Individual tests can be run using ctest.
For example if the output of make check ends like this:
The following tests FAILED:
77 - PyQgsLocalServer (Failed)
You could re-run the failing test with:
ctest -V -R PyQgsLocalServer
The parameter -V enables verbose mode and -R takes a regular expression as
parameter and will only run matching tests.
Advanced configuration
Postgres
Make sure that you have enabled building of postgres test in CMake.
cmake -DENABLE_PGTEST=ON ..
To test the postgres provider you will need to have a database available to which the postgres provider can connect. The server will need to have postgis support enabled.
By default the test uses the following connection string:
dbname=qgis_test
If this does not match your setup you can set the environment variable
QGIS_PGTEST_DB to the desired connection string, or you can rely
on standard libpq environment variables to tweak host, port user and
password (PGHOST, PGPORT, PGUSER, PGPASSWORD).
Please note that the database needs to be initialized using the sql-scripts:
tests/testdata/provider/testdata_pg*.sql
They take care of activating postgis for the test database and create some tables containing test data.
For convenience, a shell script is provided to create the database and initialize it as needed:
tests/testdata/provider/testdata_pg.sh