def testExportFeatureCrs(self):
""" Test CRS transform when exporting features """
exporter = QgsJSONExporter()
self.assertFalse(exporter.sourceCrs().isValid())
#test layer
layer = QgsVectorLayer("Point?crs=epsg:3111&field=fldtxt:string",
"parent", "memory")
exporter = QgsJSONExporter(layer)
self.assertTrue(exporter.sourceCrs().isValid())
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')
exporter.setSourceCrs(
QgsCoordinateReferenceSystem(
3857, QgsCoordinateReferenceSystem.EpsgCrsId))
self.assertTrue(exporter.sourceCrs().isValid())
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3857')
# vector layer CRS should override
exporter.setVectorLayer(layer)
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')
# test that exported feature is reprojected
feature = QgsFeature(layer.fields(), 5)
feature.setGeometry(QgsGeometry(QgsPointV2(2502577, 2403869)))
feature.setAttributes(['test point'])
# low precision, only need rough coordinate to check and don't want to deal with rounding errors
exporter.setPrecision(1)
expected = """{
"type":"Feature",
"id":5,
"geometry":
{"type": "Point", "coordinates": [145, -37.9]},
"properties":{
"fldtxt":"test point"
}
}"""
self.assertEqual(exporter.exportFeature(feature), expected)
def testExportFeatureCrs(self):
""" Test CRS transform when exporting features """
exporter = QgsJSONExporter()
self.assertFalse(exporter.sourceCrs().isValid())
#test layer
layer = QgsVectorLayer("Point?crs=epsg:3111&field=fldtxt:string",
"parent", "memory")
exporter = QgsJSONExporter(layer)
self.assertTrue(exporter.sourceCrs().isValid())
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')
exporter.setSourceCrs(QgsCoordinateReferenceSystem(3857, QgsCoordinateReferenceSystem.EpsgCrsId))
self.assertTrue(exporter.sourceCrs().isValid())
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3857')
# vector layer CRS should override
exporter.setVectorLayer(layer)
self.assertEqual(exporter.sourceCrs().authid(), 'EPSG:3111')
# test that exported feature is reprojected
feature = QgsFeature(layer.fields(), 5)
feature.setGeometry(QgsGeometry(QgsPointV2(2502577, 2403869)))
feature.setAttributes(['test point'])
# low precision, only need rough coordinate to check and don't want to deal with rounding errors
exporter.setPrecision(1)
expected = """{
"type":"Feature",
"id":5,
"geometry":
{"type": "Point", "coordinates": [145, -37.9]},
"properties":{
"fldtxt":"test point"
}
}"""
self.assertEqual(exporter.exportFeature(feature), expected)
