def testJSONExporter(self): """ test converting features to GeoJSON """ fields = QgsFields() fields.append(QgsField("name", QVariant.String)) fields.append(QgsField("cost", QVariant.Double)) fields.append(QgsField("population", QVariant.Int)) feature = QgsFeature(fields, 5) feature.setGeometry(QgsGeometry(QgsPointV2(5, 6))) feature.setAttributes(['Valsier Peninsula', 6.8, 198]) exporter = QgsJSONExporter() expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) # test with linestring for bbox inclusion l = QgsLineString() l.setPoints([QgsPointV2(5, 6), QgsPointV2(15, 16)]) feature.setGeometry(QgsGeometry(QgsLineString(l))) expected = """{ "type":"Feature", "id":5, "bbox":[5, 6, 15, 16], "geometry": {"type": "LineString", "coordinates": [ [5, 6], [15, 16]]}, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) # test that precision is respected feature.setGeometry(QgsGeometry(QgsPointV2(5.444444444, 6.333333333))) exporter.setPrecision(3) self.assertEqual(exporter.precision(), 3) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5.444, 6.333]}, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) feature.setGeometry(QgsGeometry(QgsPointV2(5, 6))) exporter.setPrecision(17) # test that attribute subset is respected exporter.setAttributes([0, 2]) self.assertEqual(exporter.attributes(), [0, 2]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "name":"Valsier Peninsula", "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setAttributes([1]) self.assertEqual(exporter.attributes(), [1]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "cost":6.8 } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setAttributes([]) # text excluding attributes exporter.setExcludedAttributes([1]) self.assertEqual(exporter.excludedAttributes(), [1]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "name":"Valsier Peninsula", "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setExcludedAttributes([1, 2]) self.assertEqual(exporter.excludedAttributes(), [1, 2]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "name":"Valsier Peninsula" } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setExcludedAttributes([0, 1, 2]) self.assertEqual(exporter.excludedAttributes(), [0, 1, 2]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":null }""" self.assertEqual(exporter.exportFeature(feature), expected) # test that excluded attributes take precedence over included exporter.setAttributes([1, 2]) exporter.setExcludedAttributes([0, 1]) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":{ "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setAttributes([]) exporter.setExcludedAttributes([]) # test excluding geometry exporter.setIncludeGeometry(False) self.assertEqual(exporter.includeGeometry(), False) feature.setGeometry(QgsGeometry(QgsLineString(l))) expected = """{ "type":"Feature", "id":5, "geometry":null, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198 } }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setIncludeGeometry(True) feature.setGeometry(QgsGeometry(QgsPointV2(5, 6))) # test excluding attributes exporter.setIncludeAttributes(False) self.assertEqual(exporter.includeAttributes(), False) expected = """{ "type":"Feature", "id":5, "geometry": {"type": "Point", "coordinates": [5, 6]}, "properties":null }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setIncludeGeometry(False) expected = """{ "type":"Feature", "id":5, "geometry":null, "properties":null }""" self.assertEqual(exporter.exportFeature(feature), expected) exporter.setIncludeAttributes(True) # test overriding ID expected = """{ "type":"Feature", "id":29, "geometry":null, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198 } }""" self.assertEqual(exporter.exportFeature(feature, id=29), expected) # test injecting extra attributes expected = """{ "type":"Feature", "id":5, "geometry":null, "properties":{ "name":"Valsier Peninsula", "cost":6.8, "population":198, "extra":"val1", "extra2":2 } }""" self.assertEqual(exporter.exportFeature(feature, extraProperties={"extra": "val1", "extra2": 2}), expected) exporter.setIncludeAttributes(False) expected = """{ "type":"Feature", "id":5, "geometry":null, "properties":{ "extra":"val1", "extra2":{"nested_map":5, "nested_map2":"val"}, "extra3":[1,2,3] } }""" self.assertEqual(exporter.exportFeature(feature, extraProperties={"extra": "val1", "extra2": {"nested_map": 5, "nested_map2": "val"}, "extra3": [1, 2, 3]}), expected) exporter.setIncludeGeometry(True)