def test_zoom_out_adds_1_10th_on_each_side(self):
time_period = TimePeriod(ATimeType(), ATime(10), ATime(20))
self.assertEquals(
time_period.zoom(-1),
TimePeriod(ATimeType(), ATime(9), ATime(21)))
def test_zoom_out_adds_1_10th_on_each_side(self):
time_period = TimePeriod(ATimeType(), ATime(10), ATime(20))
self.assertEquals(time_period.zoom(-1),
TimePeriod(ATimeType(), ATime(9), ATime(21)))
def test_zoom_in_removes_1_10th_on_each_side(self):
time_period = TimePeriod(ATimeType(), ATime(10), ATime(20))
self.assertEquals(
time_period.zoom(1),
TimePeriod(ATimeType(), ATime(11), ATime(19)))
def test_zoom_in_removes_1_10th_on_each_side(self):
time_period = TimePeriod(ATimeType(), ATime(10), ATime(20))
self.assertEquals(time_period.zoom(1),
TimePeriod(ATimeType(), ATime(11), ATime(19)))
