def testFieldValueConverter(self):
"""test no crash when fieldValueConverter is used"""
self.layer = self.createLayer()
options = QgsVectorFileWriter.SaveVectorOptions()
converter = QgsVectorFileWriter.FieldValueConverter()
options.fieldValueConverter = converter
tmp = create_temp_filename('converter.shp')
task = QgsVectorFileWriterTask(self.layer, tmp, options)
task.writeComplete.connect(self.onSuccess)
task.errorOccurred.connect(self.onFail)
del converter
QgsApplication.taskManager().addTask(task)
while not self.success and not self.fail:
QCoreApplication.processEvents()
self.assertTrue(self.success)
self.assertFalse(self.fail)
