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test_provider_memory.py
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test_provider_memory.py
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# -*- coding: utf-8 -*-
"""QGIS Unit tests for the memory layer provider.
.. 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__ = 'Matthias Kuhn'
__date__ = '2015-04-23'
__copyright__ = 'Copyright 2015, The QGIS Project'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from qgis.core import (
QGis,
QgsField,
QgsPoint,
QgsMapLayer,
QgsVectorLayer,
QgsFeatureRequest,
QgsFeature,
QgsGeometry,
NULL
)
from qgis.testing import (
start_app,
unittest
)
from utilities import (
unitTestDataPath,
compareWkt
)
from providertestbase import ProviderTestCase
from PyQt.QtCore import QVariant
start_app()
TEST_DATA_DIR = unitTestDataPath()
class TestPyQgsMemoryProvider(unittest.TestCase, ProviderTestCase):
@classmethod
def setUpClass(cls):
"""Run before all tests"""
# Create test layer
cls.vl = QgsVectorLayer(u'Point?crs=epsg:4326&field=pk:integer&field=cnt:integer&field=name:string(0)&field=name2:string(0)&field=num_char:string&key=pk',
u'test', u'memory')
assert (cls.vl.isValid())
cls.provider = cls.vl.dataProvider()
f1 = QgsFeature()
f1.setAttributes([5, -200, NULL, 'NuLl', '5'])
f1.setGeometry(QgsGeometry.fromWkt('Point (-71.123 78.23)'))
f2 = QgsFeature()
f2.setAttributes([3, 300, 'Pear', 'PEaR', '3'])
f3 = QgsFeature()
f3.setAttributes([1, 100, 'Orange', 'oranGe', '1'])
f3.setGeometry(QgsGeometry.fromWkt('Point (-70.332 66.33)'))
f4 = QgsFeature()
f4.setAttributes([2, 200, 'Apple', 'Apple', '2'])
f4.setGeometry(QgsGeometry.fromWkt('Point (-68.2 70.8)'))
f5 = QgsFeature()
f5.setAttributes([4, 400, 'Honey', 'Honey', '4'])
f5.setGeometry(QgsGeometry.fromWkt('Point (-65.32 78.3)'))
cls.provider.addFeatures([f1, f2, f3, f4, f5])
# poly layer
cls.poly_vl = QgsVectorLayer(u'Polygon?crs=epsg:4326&field=pk:integer&key=pk',
u'test', u'memory')
assert (cls.poly_vl.isValid())
cls.poly_provider = cls.poly_vl.dataProvider()
f1 = QgsFeature()
f1.setAttributes([1])
f1.setGeometry(QgsGeometry.fromWkt('Polygon ((-69.03664108 81.35818902, -69.09237722 80.24346619, -73.718477 80.1319939, -73.718477 76.28620011, -74.88893598 76.34193625, -74.83319983 81.35818902, -69.03664108 81.35818902))'))
f2 = QgsFeature()
f2.setAttributes([2])
f2.setGeometry(QgsGeometry.fromWkt('Polygon ((-67.58750139 81.1909806, -66.30557012 81.24671674, -66.30557012 76.89929767, -67.58750139 76.89929767, -67.58750139 81.1909806))'))
f3 = QgsFeature()
f3.setAttributes([3])
f3.setGeometry(QgsGeometry.fromWkt('Polygon ((-68.36780737 75.78457483, -67.53176524 72.60761475, -68.64648808 73.66660144, -70.20710006 72.9420316, -68.36780737 75.78457483))'))
f4 = QgsFeature()
f4.setAttributes([4])
cls.poly_provider.addFeatures([f1, f2, f3, f4])
@classmethod
def tearDownClass(cls):
"""Run after all tests"""
def testGetFeaturesSubsetAttributes2(self):
""" Override and skip this test for memory provider, as it's actually more efficient for the memory provider to return
its features as direct copies (due to implicit sharing of QgsFeature)
"""
pass
def testGetFeaturesNoGeometry(self):
""" Override and skip this test for memory provider, as it's actually more efficient for the memory provider to return
its features as direct copies (due to implicit sharing of QgsFeature)
"""
pass
def testCtors(self):
testVectors = ["Point", "LineString", "Polygon", "MultiPoint", "MultiLineString", "MultiPolygon", "None"]
for v in testVectors:
layer = QgsVectorLayer(v, "test", "memory")
assert layer.isValid(), "Failed to create valid %s memory layer" % (v)
def testLayerGeometry(self):
testVectors = [("Point", QGis.Point, QGis.WKBPoint),
("LineString", QGis.Line, QGis.WKBLineString),
("Polygon", QGis.Polygon, QGis.WKBPolygon),
("MultiPoint", QGis.Point, QGis.WKBMultiPoint),
("MultiLineString", QGis.Line, QGis.WKBMultiLineString),
("MultiPolygon", QGis.Polygon, QGis.WKBMultiPolygon),
("None", QGis.NoGeometry, QGis.WKBNoGeometry)]
for v in testVectors:
layer = QgsVectorLayer(v[0], "test", "memory")
myMessage = ('Expected: %s\nGot: %s\n' %
(v[1], layer.geometryType()))
assert layer.geometryType() == v[1], myMessage
myMessage = ('Expected: %s\nGot: %s\n' %
(v[2], layer.wkbType()))
assert layer.wkbType() == v[2], myMessage
def testAddFeatures(self):
layer = QgsVectorLayer("Point", "test", "memory")
provider = layer.dataProvider()
res = provider.addAttributes([QgsField("name", QVariant.String, ),
QgsField("age", QVariant.Int),
QgsField("size", QVariant.Double)])
assert res, "Failed to add attributes"
myMessage = ('Expected: %s\nGot: %s\n' %
(3, len(provider.fields())))
assert len(provider.fields()) == 3, myMessage
ft = QgsFeature()
ft.setGeometry(QgsGeometry.fromPoint(QgsPoint(10, 10)))
ft.setAttributes(["Johny",
20,
0.3])
res, t = provider.addFeatures([ft])
assert res, "Failed to add feature"
myMessage = ('Expected: %s\nGot: %s\n' %
(1, provider.featureCount()))
assert provider.featureCount() == 1, myMessage
for f in provider.getFeatures(QgsFeatureRequest()):
myMessage = ('Expected: %s\nGot: %s\n' %
("Johny", f[0]))
assert f[0] == "Johny", myMessage
myMessage = ('Expected: %s\nGot: %s\n' %
(20, f[1]))
assert f[1] == 20, myMessage
myMessage = ('Expected: %s\nGot: %s\n' %
(0.3, f[2]))
assert (f[2] - 0.3) < 0.0000001, myMessage
geom = f.geometry()
myMessage = ('Expected: %s\nGot: %s\n' %
("Point (10 10)", str(geom.exportToWkt())))
assert compareWkt(str(geom.exportToWkt()), "Point (10 10)"), myMessage
def testGetFields(self):
layer = QgsVectorLayer("Point", "test", "memory")
provider = layer.dataProvider()
provider.addAttributes([QgsField("name", QVariant.String, ),
QgsField("age", QVariant.Int),
QgsField("size", QVariant.Double)])
myMessage = ('Expected: %s\nGot: %s\n' %
(3, len(provider.fields())))
assert len(provider.fields()) == 3, myMessage
ft = QgsFeature()
ft.setGeometry(QgsGeometry.fromPoint(QgsPoint(10, 10)))
ft.setAttributes(["Johny",
20,
0.3])
provider.addFeatures([ft])
for f in provider.getFeatures(QgsFeatureRequest()):
myMessage = ('Expected: %s\nGot: %s\n' %
("Johny", f['name']))
self.assertEqual(f["name"], "Johny", myMessage)
def testFromUri(self):
"""Test we can construct the mem provider from a uri"""
myMemoryLayer = QgsVectorLayer(
('Point?crs=epsg:4326&field=name:string(20)&'
'field=age:integer&field=size:double&index=yes'),
'test',
'memory')
assert myMemoryLayer is not None, 'Provider not initialized'
myProvider = myMemoryLayer.dataProvider()
assert myProvider is not None
def testSaveFields(self):
# Create a new memory layer with no fields
myMemoryLayer = QgsVectorLayer(
('Point?crs=epsg:4326&index=yes'),
'test',
'memory')
# Add some fields to the layer
myFields = [QgsField('TestInt', QVariant.Int, 'integer', 2, 0),
QgsField('TestLong', QVariant.LongLong, 'long', -1, 0),
QgsField('TestDbl', QVariant.Double, 'double', 8, 6),
QgsField('TestString', QVariant.String, 'string', 50, 0),
QgsField('TestDate', QVariant.Date, 'date'),
QgsField('TestTime', QVariant.Time, 'time'),
QgsField('TestDateTime', QVariant.DateTime, 'datetime')]
assert myMemoryLayer.startEditing()
for f in myFields:
assert myMemoryLayer.addAttribute(f)
assert myMemoryLayer.commitChanges()
myMemoryLayer.updateFields()
# Export the layer to a layer-definition-XML
qlr = QgsMapLayer.asLayerDefinition([myMemoryLayer])
assert qlr is not None
# Import the layer from the layer-definition-XML
layers = QgsMapLayer.fromLayerDefinition(qlr)
assert layers is not None
myImportedLayer = layers[0]
assert myImportedLayer is not None
# Check for the presence of the fields
importedFields = myImportedLayer.fields()
assert importedFields is not None
for f in myFields:
assert f == importedFields.field(f.name())
class TestPyQgsMemoryProviderIndexed(unittest.TestCase, ProviderTestCase):
"""Runs the provider test suite against an indexed memory layer"""
@classmethod
def setUpClass(cls):
"""Run before all tests"""
# Create test layer
cls.vl = QgsVectorLayer(u'Point?crs=epsg:4326&index=yes&field=pk:integer&field=cnt:int8&field=name:string(0)&field=name2:string(0)&field=num_char:string&key=pk',
u'test', u'memory')
assert (cls.vl.isValid())
cls.provider = cls.vl.dataProvider()
f1 = QgsFeature()
f1.setAttributes([5, -200, NULL, 'NuLl', '5'])
f1.setGeometry(QgsGeometry.fromWkt('Point (-71.123 78.23)'))
f2 = QgsFeature()
f2.setAttributes([3, 300, 'Pear', 'PEaR', '3'])
f3 = QgsFeature()
f3.setAttributes([1, 100, 'Orange', 'oranGe', '1'])
f3.setGeometry(QgsGeometry.fromWkt('Point (-70.332 66.33)'))
f4 = QgsFeature()
f4.setAttributes([2, 200, 'Apple', 'Apple', '2'])
f4.setGeometry(QgsGeometry.fromWkt('Point (-68.2 70.8)'))
f5 = QgsFeature()
f5.setAttributes([4, 400, 'Honey', 'Honey', '4'])
f5.setGeometry(QgsGeometry.fromWkt('Point (-65.32 78.3)'))
cls.provider.addFeatures([f1, f2, f3, f4, f5])
# poly layer
cls.poly_vl = QgsVectorLayer(u'Polygon?crs=epsg:4326&index=yes&field=pk:integer&key=pk',
u'test', u'memory')
assert (cls.poly_vl.isValid())
cls.poly_provider = cls.poly_vl.dataProvider()
f1 = QgsFeature()
f1.setAttributes([1])
f1.setGeometry(QgsGeometry.fromWkt('Polygon ((-69.0 81.4, -69.0 80.2, -73.7 80.2, -73.7 76.3, -74.9 76.3, -74.9 81.4, -69.0 81.4))'))
f2 = QgsFeature()
f2.setAttributes([2])
f2.setGeometry(QgsGeometry.fromWkt('Polygon ((-67.6 81.2, -66.3 81.2, -66.3 76.9, -67.6 76.9, -67.6 81.2))'))
f3 = QgsFeature()
f3.setAttributes([3])
f3.setGeometry(QgsGeometry.fromWkt('Polygon ((-68.4 75.8, -67.5 72.6, -68.6 73.7, -70.2 72.9, -68.4 75.8))'))
f4 = QgsFeature()
f4.setAttributes([4])
cls.poly_provider.addFeatures([f1, f2, f3, f4])
@classmethod
def tearDownClass(cls):
"""Run after all tests"""
def testGetFeaturesSubsetAttributes2(self):
""" Override and skip this test for memory provider, as it's actually more efficient for the memory provider to return
its features as direct copies (due to implicit sharing of QgsFeature)
"""
pass
def testGetFeaturesNoGeometry(self):
""" Override and skip this test for memory provider, as it's actually more efficient for the memory provider to return
its features as direct copies (due to implicit sharing of QgsFeature)
"""
pass
if __name__ == '__main__':
unittest.main()