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Merge pull request #4943 from nyalldawson/exp_layer_rel
Add items for project map layers and relations to expression builder
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{ | ||
"name": "Map Layers", | ||
"type": "group", | ||
"description": "Contains a list of map layers available in the current project." | ||
} |
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{ | ||
"name": "Relations", | ||
"type": "group", | ||
"description": "Contains a list of relations available in the current project." | ||
} |
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# -*- coding: utf-8 -*- | ||
"""QGIS Unit tests for QgsExpressionBuilderWidget | ||
.. 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__ = 'Nyall Dawson' | ||
__date__ = '30/07/2017' | ||
__copyright__ = 'Copyright 2017, The QGIS Project' | ||
# This will get replaced with a git SHA1 when you do a git archive | ||
__revision__ = '$Format:%H$' | ||
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import qgis # NOQA | ||
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from qgis.PyQt.QtCore import Qt | ||
from qgis.testing import start_app, unittest | ||
from qgis.gui import QgsExpressionBuilderWidget | ||
from qgis.core import (QgsExpressionContext, | ||
QgsExpressionContextScope, | ||
QgsProject, | ||
QgsVectorLayer, | ||
QgsRelation, | ||
QgsFeature, | ||
QgsGeometry) | ||
start_app() | ||
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def createReferencingLayer(): | ||
layer = QgsVectorLayer("Point?field=fldtxt:string&field=foreignkey:integer", | ||
"referencinglayer", "memory") | ||
pr = layer.dataProvider() | ||
f1 = QgsFeature() | ||
f1.setFields(layer.pendingFields()) | ||
f1.setAttributes(["test1", 123]) | ||
f2 = QgsFeature() | ||
f2.setFields(layer.pendingFields()) | ||
f2.setAttributes(["test2", 123]) | ||
f3 = QgsFeature() | ||
f3.setFields(layer.pendingFields()) | ||
f3.setAttributes(["foobar'bar", 124]) | ||
assert pr.addFeatures([f1, f2, f3]) | ||
return layer | ||
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def createReferencedLayer(): | ||
layer = QgsVectorLayer( | ||
"Point?field=x:string&field=y:integer&field=z:integer", | ||
"referencedlayer", "memory") | ||
pr = layer.dataProvider() | ||
f1 = QgsFeature() | ||
f1.setFields(layer.pendingFields()) | ||
f1.setAttributes(["foo", 123, 321]) | ||
f2 = QgsFeature() | ||
f2.setFields(layer.pendingFields()) | ||
f2.setAttributes(["bar", 456, 654]) | ||
f3 = QgsFeature() | ||
f3.setFields(layer.pendingFields()) | ||
f3.setAttributes(["foobar'bar", 789, 554]) | ||
assert pr.addFeatures([f1, f2, f3]) | ||
return layer | ||
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class TestQgsExpressionBuilderWidget(unittest.TestCase): | ||
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def setUp(self): | ||
self.referencedLayer = createReferencedLayer() | ||
self.referencingLayer = createReferencingLayer() | ||
QgsProject.instance().addMapLayers([self.referencedLayer, self.referencingLayer]) | ||
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def testFunctionPresent(self): | ||
""" check through widget model to ensure it is initially populated with functions """ | ||
w = QgsExpressionBuilderWidget() | ||
m = w.model() | ||
# check that some standard expression functions are shown | ||
items = m.findItems('lower', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('upper', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('asdasdasda#$@#$', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 0) | ||
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def testVariables(self): | ||
""" check through widget model to ensure it is populated with variables """ | ||
w = QgsExpressionBuilderWidget() | ||
m = w.model() | ||
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s = QgsExpressionContextScope() | ||
s.setVariable('my_var1', 'x') | ||
s.setVariable('my_var2', 'y') | ||
c = QgsExpressionContext() | ||
c.appendScope(s) | ||
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# check that variables are added when setting context | ||
w.setExpressionContext(c) | ||
items = m.findItems('my_var1', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('my_var2', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('not_my_var', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 0) | ||
# double check that functions are still only there once | ||
items = m.findItems('lower', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('upper', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
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def testLayers(self): | ||
""" check that layers are shown in widget model""" | ||
p = QgsProject.instance() | ||
layer = QgsVectorLayer("Point", "layer1", "memory") | ||
layer2 = QgsVectorLayer("Point", "layer2", "memory") | ||
p.addMapLayers([layer, layer2]) | ||
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w = QgsExpressionBuilderWidget() | ||
m = w.model() | ||
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# check that layers are shown | ||
items = m.findItems('layer1', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('layer2', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
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# change project | ||
p2 = QgsProject() | ||
layer3 = QgsVectorLayer("Point", "layer3", "memory") | ||
p2.addMapLayers([layer3]) | ||
w.setProject(p2) | ||
m = w.model() | ||
items = m.findItems('layer1', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 0) | ||
items = m.findItems('layer2', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 0) | ||
items = m.findItems('layer3', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
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def testRelations(self): | ||
""" check that layers are shown in widget model""" | ||
p = QgsProject.instance() | ||
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# not valid, but doesn't matter for test.... | ||
rel = QgsRelation() | ||
rel.setId('rel1') | ||
rel.setName('Relation Number One') | ||
rel.setReferencingLayer(self.referencingLayer.id()) | ||
rel.setReferencedLayer(self.referencedLayer.id()) | ||
rel.addFieldPair('foreignkey', 'y') | ||
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rel2 = QgsRelation() | ||
rel2.setId('rel2') | ||
rel2.setName('Relation Number Two') | ||
rel2.setReferencingLayer(self.referencingLayer.id()) | ||
rel2.setReferencedLayer(self.referencedLayer.id()) | ||
rel2.addFieldPair('foreignkey', 'y') | ||
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p.relationManager().addRelation(rel) | ||
p.relationManager().addRelation(rel2) | ||
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w = QgsExpressionBuilderWidget() | ||
m = w.model() | ||
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# check that relations are shown | ||
items = m.findItems('Relation Number One', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
items = m.findItems('Relation Number Two', Qt.MatchRecursive) | ||
self.assertEqual(len(items), 1) | ||
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if __name__ == '__main__': | ||
unittest.main() |