def checkCalcDistance(self): print("Checking calcDistance...") p1 = Planet(1.0, 1.0, 3.0, 4.0, 5.0, "jupiter.gif") p2 = Planet(2.0, 1.0, 3.0, 4.0, 5.0, "jupiter.gif") p3 = Planet(4.0, 5.0, 3.0, 4.0, 5.0, "jupiter.gif") self.checkEquals(p1.calcDistance(p2), 1.0, "calcDistance()", 0.01) self.checkEquals(p1.calcDistance(p3), 5.0, "calcDistance()", 0.01)