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Extract postgres specific from PyQgsVectorLayerUtils test
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# -*- coding: utf-8 -*- | ||
"""QGIS Unit tests for QgsVectorLayerUtils in a Postgres database. | ||
.. note:: This program is free software; you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation; either version 2 of the License, or | ||
(at your option) any later version. | ||
""" | ||
__author__ = 'Julien Cabieces' | ||
__date__ = '22/03/2021' | ||
__copyright__ = 'Copyright 2021, The QGIS Project' | ||
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import os | ||
import qgis # NOQA | ||
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from qgis.core import (QgsVectorLayer, | ||
QgsVectorLayerUtils, | ||
QgsDefaultValue, | ||
NULL | ||
) | ||
from qgis.testing import start_app, unittest | ||
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start_app() | ||
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class TestQgsVectorLayerUtilsPostgres(unittest.TestCase): | ||
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def testCreateFeature(self): | ||
""" test creating a feature respecting unique values of postgres provider """ | ||
layer = QgsVectorLayer("Point?field=fldtxt:string&field=fldint:integer&field=flddbl:double", | ||
"addfeat", "memory") | ||
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# init connection string | ||
dbconn = 'service=qgis_test' | ||
if 'QGIS_PGTEST_DB' in os.environ: | ||
dbconn = os.environ['QGIS_PGTEST_DB'] | ||
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# create a vector layer | ||
pg_layer = QgsVectorLayer('{} table="qgis_test"."authors" sql='.format(dbconn), "authors", "postgres") | ||
self.assertTrue(pg_layer.isValid()) | ||
# check the default clause | ||
default_clause = 'nextval(\'qgis_test.authors_pk_seq\'::regclass)' | ||
self.assertEqual(pg_layer.dataProvider().defaultValueClause(0), default_clause) | ||
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# though default_clause is after the first create not unique (until save), it should fill up all the features with it | ||
pg_layer.startEditing() | ||
f = QgsVectorLayerUtils.createFeature(pg_layer) | ||
self.assertEqual(f.attributes(), [default_clause, NULL]) | ||
self.assertTrue(pg_layer.addFeatures([f])) | ||
self.assertTrue(QgsVectorLayerUtils.valueExists(pg_layer, 0, default_clause)) | ||
f = QgsVectorLayerUtils.createFeature(pg_layer) | ||
self.assertEqual(f.attributes(), [default_clause, NULL]) | ||
self.assertTrue(pg_layer.addFeatures([f])) | ||
f = QgsVectorLayerUtils.createFeature(pg_layer) | ||
self.assertEqual(f.attributes(), [default_clause, NULL]) | ||
self.assertTrue(pg_layer.addFeatures([f])) | ||
# if a unique value is passed, use it | ||
f = QgsVectorLayerUtils.createFeature(pg_layer, attributes={0: 40, 1: NULL}) | ||
self.assertEqual(f.attributes(), [40, NULL]) | ||
# and if a default value is configured use it as well | ||
pg_layer.setDefaultValueDefinition(0, QgsDefaultValue('11*4')) | ||
f = QgsVectorLayerUtils.createFeature(pg_layer) | ||
self.assertEqual(f.attributes(), [44, NULL]) | ||
pg_layer.rollBack() | ||
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if __name__ == '__main__': | ||
unittest.main() |