def METHOD_NAME(self):
    self.layer_settings[Tags.STRUCTURE_START_MM] = [0, 0, 1.2]
    self.layer_settings[Tags.STRUCTURE_END_MM] = [0, 0, 2.0]
    ls = HorizontalLayerStructure(self.global_settings, self.layer_settings)
    self.assert_values(ls.geometrical_volume, [0, 0.8, 0, 0, 0, 0])
    self.layer_settings[Tags.STRUCTURE_START_MM] = [0, 0, 1.0]
    self.layer_settings[Tags.STRUCTURE_END_MM] = [0, 0, 1.8]
    ls = HorizontalLayerStructure(self.global_settings, self.layer_settings)
    self.assert_values(ls.geometrical_volume, [0, 0.8, 0, 0, 0, 0])