def setUp(self):
astrom_data = AstromParser().parse(
self.get_abs_path("data/1616681p22.measure3.cands.astrom"))
self.source = astrom_data.get_sources()[0]
self.reading0 = self.source.get_reading(0)
self.reading1 = self.source.get_reading(1)
self.reading2 = self.source.get_reading(2)
self.undertest = TripletFocusCalculator(self.source)
