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[relations] Add method to manager to retrieve relations by name
Also - Begin unit tests for QgsRelationManager - Make project optional when constructing QgsRelationManager
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# -*- coding: utf-8 -*- | |||
"""QGIS Unit tests for QgsRelationManager. | |||
.. 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__ = '17/05/2016' | |||
__copyright__ = 'Copyright 2016, 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.core import (QgsVectorLayer, | |||
QgsRelation, | |||
QgsRelationManager, | |||
QgsMapLayerRegistry | |||
) | |||
from qgis.testing import start_app, unittest | |||
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start_app() | |||
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def createReferencingLayer(): | |||
layer = QgsVectorLayer("Point?field=fldtxt:string&field=foreignkey:integer", | |||
"referencinglayer", "memory") | |||
return layer | |||
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def createReferencedLayer(): | |||
layer = QgsVectorLayer( | |||
"Point?field=x:string&field=y:integer&field=z:integer", | |||
"referencedlayer", "memory") | |||
return layer | |||
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class TestQgsRelationManager(unittest.TestCase): | |||
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def setUp(self): | |||
self.referencedLayer = createReferencedLayer() | |||
self.referencingLayer = createReferencingLayer() | |||
QgsMapLayerRegistry.instance().addMapLayers([self.referencedLayer, self.referencingLayer]) | |||
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def tearDown(self): | |||
QgsMapLayerRegistry.instance().removeAllMapLayers() | |||
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def createRelation(self): | |||
rel = QgsRelation() | |||
rel.setReferencingLayer(self.referencingLayer.id()) | |||
rel.setReferencedLayer(self.referencedLayer.id()) | |||
rel.addFieldPair('foreignkey', 'y') | |||
return rel | |||
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def test_addRelation(self): | |||
""" test adding relations to a manager """ | |||
manager = QgsRelationManager() | |||
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relations = manager.relations() | |||
self.assertEqual(len(relations), 0) | |||
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rel = self.createRelation() | |||
rel.setRelationId('rel1') | |||
rel.setRelationName('Relation Number One') | |||
assert rel.isValid() | |||
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manager.addRelation(rel) | |||
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relations = manager.relations() | |||
self.assertEqual(len(relations), 1) | |||
self.assertEqual(relations['rel1'].id(), 'rel1') | |||
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rel = self.createRelation() | |||
rel.setRelationId('rel2') | |||
rel.setRelationName('Relation Number Two') | |||
assert rel.isValid() | |||
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manager.addRelation(rel) | |||
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relations = manager.relations() | |||
self.assertEqual(len(relations), 2) | |||
ids = [r.id() for r in relations.values()] | |||
self.assertEqual(set(ids), set(['rel1', 'rel2'])) | |||
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def test_relationById(self): | |||
""" test retrieving relation by id""" | |||
manager = QgsRelationManager() | |||
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rel = manager.relation('does not exist') | |||
self.assertFalse(rel.isValid()) | |||
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# add two relations | |||
rel = self.createRelation() | |||
rel.setRelationId('rel1') | |||
rel.setRelationName('Relation Number One') | |||
assert rel.isValid() | |||
manager.addRelation(rel) | |||
rel = self.createRelation() | |||
rel.setRelationId('rel2') | |||
rel.setRelationName('Relation Number Two') | |||
assert rel.isValid() | |||
manager.addRelation(rel) | |||
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rel = manager.relation('does not exist') | |||
self.assertFalse(rel.isValid()) | |||
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rel = manager.relation('rel1') | |||
self.assertEqual(rel.id(), 'rel1') | |||
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rel = manager.relation('rel2') | |||
self.assertEqual(rel.id(), 'rel2') | |||
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def test_relationByName(self): | |||
""" test retrieving relations by name""" | |||
manager = QgsRelationManager() | |||
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rels = manager.relationsByName('does not exist') | |||
self.assertEqual(rels, []) | |||
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# add some relations | |||
rel = self.createRelation() | |||
rel.setRelationId('rel1') | |||
rel.setRelationName('my relation') | |||
assert rel.isValid() | |||
manager.addRelation(rel) | |||
rel = self.createRelation() | |||
rel.setRelationId('rel2') | |||
rel.setRelationName('dupe name') | |||
assert rel.isValid() | |||
manager.addRelation(rel) | |||
rel = self.createRelation() | |||
rel.setRelationId('rel3') | |||
rel.setRelationName('dupe name') | |||
assert rel.isValid() | |||
manager.addRelation(rel) | |||
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rels = manager.relationsByName('does not exist') | |||
self.assertEqual(rels, []) | |||
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rels = manager.relationsByName('my relation') | |||
ids = [r.id() for r in rels] | |||
self.assertEqual(set(ids), set(['rel1'])) | |||
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# case insensitive | |||
rels = manager.relationsByName('My RelAtion') | |||
ids = [r.id() for r in rels] | |||
self.assertEqual(set(ids), set(['rel1'])) | |||
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# multiple results | |||
rels = manager.relationsByName('dupe name') | |||
ids = [r.id() for r in rels] | |||
self.assertEqual(set(ids), set(['rel2', 'rel3'])) | |||
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if __name__ == '__main__': | |||
unittest.main() |