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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() |