public void CaulculateTimeForTrip_CorrectDistanceTest() { Drone drone = new Drone(new Coordinates(0, 0, 5)); Coordinates newPosition = new Coordinates(200, 0, 5); double expected = 18.333333; double actual = drone.CaulculateTimeForTrip(newPosition); double roundingError = 0.000001; //0,0036 seconds Assert.IsTrue(Math.Abs(expected - actual) < roundingError); }