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"""QGIS Unit tests for Processing CheckValidity algorithm.
.. 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"
from qgis.PyQt.QtCore import QCoreApplication, QVariant
from qgis.core import (
QgsFeature,
QgsGeometry,
QgsApplication,
QgsMemoryProviderUtils,
QgsWkbTypes,
QgsField,
QgsFields,
QgsProcessingContext,
QgsProcessingFeedback,
QgsCoordinateReferenceSystem,
QgsProject,
QgsProcessingException,
QgsProcessingUtils,
QgsSettings,
)
from processing.core.Processing import Processing
from processing.gui.AlgorithmExecutor import execute
import unittest
from qgis.testing import start_app, QgisTestCase
from qgis.PyQt.QtTest import QSignalSpy
from qgis.analysis import QgsNativeAlgorithms
start_app()
class ConsoleFeedBack(QgsProcessingFeedback):
def reportError(self, error, fatalError=False):
print(error)
class TestQgsProcessingCheckValidity(QgisTestCase):
@classmethod
def setUpClass(cls):
"""Run before all tests"""
super().setUpClass()
QCoreApplication.setOrganizationName("QGIS_Test")
QCoreApplication.setOrganizationDomain(
"QGIS_TestPyQgsProcessingCheckValidity.com"
)
QCoreApplication.setApplicationName("QGIS_TestPyQgsProcessingCheckValidity")
QgsSettings().clear()
Processing.initialize()
cls.registry = QgsApplication.instance().processingRegistry()
def _make_layer(self, layer_wkb_name):
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("EPSG:4326"),
)
self.assertTrue(layer.isValid())
self.assertEqual(layer.wkbType(), wkb_type)
return layer
def test_check_validity(self):
"""Test that the output invalid contains the error reason"""
polygon_layer = self._make_layer("Polygon")
self.assertTrue(polygon_layer.startEditing())
f = QgsFeature(polygon_layer.fields())
f.setAttributes([1])
# Flake!
f.setGeometry(QgsGeometry.fromWkt("POLYGON ((0 0, 2 2, 0 2, 2 0, 0 0))"))
self.assertTrue(f.isValid())
f2 = QgsFeature(polygon_layer.fields())
f2.setAttributes([1])
f2.setGeometry(
QgsGeometry.fromWkt(
"POLYGON((1.1 1.1, 1.1 2.1, 2.1 2.1, 2.1 1.1, 1.1 1.1))"
)
)
self.assertTrue(f2.isValid())
self.assertTrue(polygon_layer.addFeatures([f, f2]))
polygon_layer.commitChanges()
polygon_layer.rollBack()
self.assertEqual(polygon_layer.featureCount(), 2)
QgsProject.instance().addMapLayers([polygon_layer])
alg = self.registry.createAlgorithmById("qgis:checkvalidity")
context = QgsProcessingContext()
context.setProject(QgsProject.instance())
feedback = ConsoleFeedBack()
self.assertIsNotNone(alg)
parameters = {}
parameters["INPUT_LAYER"] = polygon_layer.id()
parameters["VALID_OUTPUT"] = "memory:"
parameters["INVALID_OUTPUT"] = "memory:"
parameters["ERROR_OUTPUT"] = "memory:"
# QGIS method
parameters["METHOD"] = 1
ok, results = execute(alg, parameters, context=context, feedback=feedback)
self.assertTrue(ok)
invalid_layer = QgsProcessingUtils.mapLayerFromString(
results["INVALID_OUTPUT"], context
)
self.assertEqual(invalid_layer.fields().names()[-1], "_errors")
self.assertEqual(invalid_layer.featureCount(), 1)
f = next(invalid_layer.getFeatures())
self.assertEqual(
f.attributes(), [1, "segments 0 and 2 of line 0 intersect at 1, 1"]
)
# GEOS method
parameters["METHOD"] = 2
ok, results = execute(alg, parameters, context=context, feedback=feedback)
self.assertTrue(ok)
invalid_layer = QgsProcessingUtils.mapLayerFromString(
results["INVALID_OUTPUT"], context
)
self.assertEqual(invalid_layer.fields().names()[-1], "_errors")
self.assertEqual(invalid_layer.featureCount(), 1)
f = next(invalid_layer.getFeatures())
self.assertEqual(f.attributes(), [1, "Self-intersection"])
if __name__ == "__main__":
unittest.main()
|
