def test_that_gets_None_for_empty_roi_files(self):
# Arrange
command_iface.Clean()
command_iface.SANS2D()
# Act
result = command_iface.GetTransmissionROI()
# Assert
self.assertEqual(None, result, 'The transmission roi should be None')
def test_that_gets_non_empty_roi_files(self):
# Arrange
trans_roi_files = ['roi_file1.xml', 'roi_file2.xml']
command_iface.Clean()
command_iface.SANS2D()
ReductionSingleton().transmission_calculator.roi_files = trans_roi_files
# Act
result = command_iface.GetTransmissionROI()
# Assert
self.assertEqual(trans_roi_files, result, 'The transmission roi should have two entries')
