def testStringToTransformId(self):
"""
Test converting proj strings to corresponding datum IDs
"""
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId(''), -1)
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId('not'), -1)
test_string = '+towgs84=-403,684,41'
id = QgsCoordinateTransform.projStringToDatumTransformId(test_string)
self.assertNotEqual(id, -1)
string = QgsCoordinateTransform.datumTransformToProj(id)
self.assertEqual(string, test_string)
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId(
test_string.upper()), id)
