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test_qgsprocessinginplace.py
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test_qgsprocessinginplace.py
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# -*- coding: utf-8 -*-
"""QGIS Unit tests for Processing In-Place algorithms.
.. 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__ = 'Alessandro Pasotti'
__date__ = '2018-09'
__copyright__ = 'Copyright 2018, The QGIS Project'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from qgis.PyQt.QtCore import QCoreApplication, QVariant
from qgis.core import (
QgsFeature, QgsGeometry, QgsSettings, QgsApplication, QgsMemoryProviderUtils, QgsWkbTypes, QgsField, QgsFields, QgsProcessingFeatureSourceDefinition, QgsProcessingContext, QgsProcessingFeedback, QgsCoordinateReferenceSystem, QgsProject, QgsProcessingException
)
from processing.core.Processing import Processing
from processing.gui.AlgorithmExecutor import execute_in_place_run, make_features_compatible
from qgis.testing import start_app, unittest
from qgis.PyQt.QtTest import QSignalSpy
from qgis.analysis import QgsNativeAlgorithms
start_app()
class TestQgsProcessingInPlace(unittest.TestCase):
@classmethod
def setUpClass(cls):
"""Run before all tests"""
QCoreApplication.setOrganizationName("QGIS_Test")
QCoreApplication.setOrganizationDomain(
"QGIS_TestPyQgsProcessingInPlace.com")
QCoreApplication.setApplicationName("QGIS_TestPyQgsProcessingInPlace")
QgsSettings().clear()
Processing.initialize()
QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
cls.registry = QgsApplication.instance().processingRegistry()
fields = QgsFields()
fields.append(QgsField('int_f', QVariant.Int))
cls.vl = QgsMemoryProviderUtils.createMemoryLayer(
'mylayer', fields, QgsWkbTypes.Point, QgsCoordinateReferenceSystem(4326))
f1 = QgsFeature(cls.vl.fields())
f1['int_f'] = 1
f1.setGeometry(QgsGeometry.fromWkt('Point(9 45)'))
f2 = QgsFeature(cls.vl.fields())
f2['int_f'] = 2
f2.setGeometry(QgsGeometry.fromWkt('Point(9.5 45.6)'))
cls.vl.dataProvider().addFeatures([f1, f2])
assert cls.vl.isValid()
assert cls.vl.featureCount() == 2
# Multipolygon layer
cls.multipoly_vl = QgsMemoryProviderUtils.createMemoryLayer(
'mymultiplayer', fields, QgsWkbTypes.MultiPolygon, QgsCoordinateReferenceSystem(4326))
f3 = QgsFeature(cls.multipoly_vl.fields())
f3.setGeometry(QgsGeometry.fromWkt('MultiPolygon (((2.81856297539240419 41.98170998812887689, 2.81874467773035464 41.98167537995160359, 2.81879535908157752 41.98154066615795443, 2.81866433873670452 41.98144056064155905, 2.81848263699778379 41.98147516865246587, 2.81843195500470811 41.98160988234612034, 2.81856297539240419 41.98170998812887689)),((2.81898589063455907 41.9815711567298635, 2.81892080450418803 41.9816030048432367, 2.81884192631866437 41.98143737613141724, 2.8190679469505846 41.98142270931093378, 2.81898589063455907 41.9815711567298635)))'))
f4 = QgsFeature(cls.multipoly_vl.fields())
f4.setGeometry(QgsGeometry.fromWkt('MultiPolygon (((2.81823679385631332 41.98133290154246566, 2.81830770255185703 41.98123540208609228, 2.81825871989355159 41.98112524362621656, 2.81813882853970243 41.98111258462271422, 2.81806791984415872 41.98121008407908761, 2.81811690250246416 41.98132024253896333, 2.81823679385631332 41.98133290154246566)),((2.81835835162010895 41.98123286963267731, 2.8183127674586852 41.98108725356146209, 2.8184520523963692 41.98115436357689134, 2.81835835162010895 41.98123286963267731)))'))
cls.multipoly_vl.dataProvider().addFeatures([f3, f4])
assert cls.multipoly_vl.isValid()
assert cls.multipoly_vl.featureCount() == 2
QgsProject.instance().addMapLayers([cls.vl, cls.multipoly_vl])
def _alg_tester(self, alg_name, input_layer, parameters):
alg = self.registry.createAlgorithmById(alg_name)
self.assertIsNotNone(alg)
parameters['INPUT'] = QgsProcessingFeatureSourceDefinition(
input_layer.id(), True)
parameters['OUTPUT'] = 'memory:'
old_features = [f for f in input_layer.getFeatures()]
input_layer.selectByIds([old_features[0].id()])
# Check selected
self.assertEqual(input_layer.selectedFeatureIds(), [old_features[0].id()], alg_name)
context = QgsProcessingContext()
context.setProject(QgsProject.instance())
feedback = QgsProcessingFeedback()
input_layer.rollBack()
with self.assertRaises(QgsProcessingException) as cm:
execute_in_place_run(
alg, input_layer, parameters, context=context, feedback=feedback, raise_exceptions=True)
ok = False
input_layer.startEditing()
ok, _ = execute_in_place_run(
alg, input_layer, parameters, context=context, feedback=feedback, raise_exceptions=True)
new_features = [f for f in input_layer.getFeatures()]
# Check ret values
self.assertTrue(ok, alg_name)
# Check geometry types (drop Z or M)
self.assertEqual(new_features[0].geometry().wkbType(), old_features[0].geometry().wkbType())
return old_features, new_features
def test_execute_in_place_run(self):
"""Test the execution in place"""
self.vl.rollBack()
old_features, new_features = self._alg_tester(
'native:translategeometry',
self.vl,
{
'DELTA_X': 1.1,
'DELTA_Y': 1.1,
}
)
# First feature was selected and modified
self.assertEqual(new_features[0].id(), old_features[0].id())
self.assertAlmostEqual(new_features[0].geometry().asPoint().x(), old_features[0].geometry().asPoint().x() + 1.1, delta=0.01)
self.assertAlmostEqual(new_features[0].geometry().asPoint().y(), old_features[0].geometry().asPoint().y() + 1.1, delta=0.01)
# Second feature was not selected and not modified
self.assertEqual(new_features[1].id(), old_features[1].id())
self.assertEqual(new_features[1].geometry().asPoint().x(), old_features[1].geometry().asPoint().x())
self.assertEqual(new_features[1].geometry().asPoint().y(), old_features[1].geometry().asPoint().y())
# Check selected
self.assertEqual(self.vl.selectedFeatureIds(), [old_features[0].id()])
# Check that if the only change is Z or M then we should fail
with self.assertRaises(QgsProcessingException) as cm:
self._alg_tester(
'native:translategeometry',
self.vl,
{
'DELTA_Z': 1.1,
}
)
self.vl.rollBack()
# Check that if the only change is Z or M then we should fail
with self.assertRaises(QgsProcessingException) as cm:
self._alg_tester(
'native:translategeometry',
self.vl,
{
'DELTA_M': 1.1,
}
)
self.vl.rollBack()
old_features, new_features = self._alg_tester(
'native:translategeometry',
self.vl,
{
'DELTA_X': 1.1,
'DELTA_Z': 1.1,
}
)
def test_multi_to_single(self):
"""Check that the geometry type is still multi after the alg is run"""
old_features, new_features = self._alg_tester(
'native:multiparttosingleparts',
self.multipoly_vl,
{
}
)
self.assertEqual(len(new_features), 3)
# Check selected
self.assertEqual(len(self.multipoly_vl.selectedFeatureIds()), 2)
def test_arrayfeatures(self):
"""Check that this runs correctly and additional attributes are dropped"""
old_count = self.vl.featureCount()
old_features, new_features = self._alg_tester(
'native:arrayfeatures',
self.vl,
{
'COUNT': 2,
'DELTA_X': 1.1,
'DELTA_Z': 1.1,
}
)
self.assertEqual(len(new_features), old_count + 2)
# Check selected
self.assertEqual(len(self.vl.selectedFeatureIds()), 3)
def test_reprojectlayer(self):
"""Check that this runs correctly"""
old_count = self.vl.featureCount()
old_features, new_features = self._alg_tester(
'native:reprojectlayer',
self.vl,
{
'TARGET_CRS': 'EPSG:3857',
}
)
g = [f.geometry() for f in new_features][0]
self.assertAlmostEqual(g.get().x(), 1001875.4, 1)
self.assertAlmostEqual(g.get().y(), 5621521.5, 1)
# Check selected
self.assertEqual(self.vl.selectedFeatureIds(), [1])
def _make_compatible_tester(self, feature_wkt, layer_wkb_name, attrs=[1], old_feature=None):
fields = QgsFields()
wkb_type = getattr(QgsWkbTypes, layer_wkb_name)
fields.append(QgsField('int_f', QVariant.Int))
layer = QgsMemoryProviderUtils.createMemoryLayer(
'%s_layer' % layer_wkb_name, fields, wkb_type, QgsCoordinateReferenceSystem(4326))
self.assertTrue(layer.isValid())
self.assertEqual(layer.wkbType(), wkb_type)
layer.startEditing()
f = QgsFeature(layer.fields())
f.setAttributes(attrs)
f.setGeometry(QgsGeometry.fromWkt(feature_wkt))
self.assertTrue(f.isValid())
# Fix it!
new_features = make_features_compatible([f], layer, old_feature)
self.assertEqual(f.geometry().wkbType(), wkb_type)
self.assertTrue(layer.addFeatures(new_features), "Fail: %s - %s - %s" % (feature_wkt, attrs, layer_wkb_name))
return layer, new_features[0]
def test_make_features_compatible(self):
"""Test fixer function"""
# Test failure
with self.assertRaises(AssertionError):
self._make_compatible_tester('LineString (1 1, 2 2, 3 3)', 'Point')
self._make_compatible_tester('Point(1 1)', 'Point')
self._make_compatible_tester('Point(1 1)', 'Point', [1, 'nope'])
self._make_compatible_tester('Point z (1 1 3)', 'Point')
self._make_compatible_tester('Point z (1 1 3)', 'PointZ')
# Adding Z back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('Point z (1 1 3)'))
l, f = self._make_compatible_tester('Point (1 1)', 'PointZ', old_feature=old_feature)
self.assertEqual(f.geometry().get().z(), 0)
# Adding M back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('Point m (1 1 3)'))
l, f = self._make_compatible_tester('Point (1 1)', 'PointM', old_feature=old_feature)
self.assertEqual(f.geometry().get().m(), 0)
self._make_compatible_tester('Point m (1 1 3)', 'Point')
self._make_compatible_tester('Point(1 3)', 'MultiPoint')
self._make_compatible_tester('MultiPoint((1 3), (2 2))', 'MultiPoint')
self._make_compatible_tester('Polygon((1 1, 2 2, 3 3, 1 1))', 'Polygon')
self._make_compatible_tester('Polygon((1 1, 2 2, 3 3, 1 1)', 'Polygon', [1, 'nope'])
self._make_compatible_tester('Polygon z ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'Polygon')
self._make_compatible_tester('Polygon z ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'PolygonZ')
# Adding Z back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('Polygon z ((1 1 1, 2 2 2, 3 3 3 , 1 1 1))'))
l, f = self._make_compatible_tester('Polygon ((1 1, 2 2, 3 3, 1 1))', 'PolygonZ', old_feature=old_feature)
g = f.geometry()
g2 = g.get()
for v in g2.vertices():
self.assertEqual(v.z(), 0)
# Adding M back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('Polygon m ((1 1 1, 2 2 2, 3 3 3 , 1 1 1))'))
l, f = self._make_compatible_tester('Polygon ((1 1, 2 2, 3 3, 1 1))', 'PolygonM', old_feature=old_feature)
g = f.geometry()
g2 = g.get()
for v in g2.vertices():
self.assertEqual(v.m(), 0)
self._make_compatible_tester('Polygon m ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'Polygon')
self._make_compatible_tester('Polygon m ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'PolygonM')
self._make_compatible_tester('Polygon((1 1, 2 2, 3 3, 1 1))', 'MultiPolygon')
self._make_compatible_tester('MultiPolygon(((1 1, 2 2, 3 3, 1 1)), ((1 1, 2 2, 3 3, 1 1)))', 'MultiPolygon')
self._make_compatible_tester('LineString((1 1, 2 2, 3 3, 1 1))', 'LineString')
self._make_compatible_tester('LineString((1 1, 2 2, 3 3, 1 1)', 'LineString', [1, 'nope'])
self._make_compatible_tester('LineString z ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'LineString')
self._make_compatible_tester('LineString z ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'LineStringZ')
self._make_compatible_tester('LineString m ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'LineString')
self._make_compatible_tester('LineString m ((1 1 1, 2 2 2, 3 3 3, 1 1 1))', 'LineStringM')
# Adding Z back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('LineString z ((1 1 1, 2 2 2, 3 3 3 , 1 1 1))'))
l, f = self._make_compatible_tester('LineString ((1 1, 2 2, 3 3, 1 1))', 'LineStringZ', old_feature=old_feature)
g = f.geometry()
g2 = g.get()
for v in g2.vertices():
self.assertEqual(v.z(), 0)
# Adding M back
old_feature = QgsFeature(self.vl.fields())
old_feature.setAttributes([1])
old_feature.setGeometry(QgsGeometry.fromWkt('LineString m ((1 1 1, 2 2 2, 3 3 3 , 1 1 1))'))
l, f = self._make_compatible_tester('LineString ((1 1, 2 2, 3 3, 1 1))', 'LineStringM', old_feature=old_feature)
g = f.geometry()
g2 = g.get()
for v in g2.vertices():
self.assertEqual(v.m(), 0)
self._make_compatible_tester('LineString((1 1, 2 2, 3 3, 1 1))', 'MultiLineString')
self._make_compatible_tester('MultiLineString(((1 1, 2 2, 3 3, 1 1)), ((1 1, 2 2, 3 3, 1 1)))', 'MultiLineString')
if __name__ == '__main__':
unittest.main()