def test_avg_returns_zero_after_filterd_list_is_empty():
c = Calc()
res = c.avg([1, 2, 3], lower=2, upper=3)
assert res == 0
def test_avg_correct_average():
c = Calc()
res = c.avg([2, 5, 12, 98])
assert res == 29.25
def test_avg_returns_zero_for_empty_list():
c = Calc()
res = c.avg([])
assert res == 0
def test_avg_removes_with_both_bounds():
c = Calc()
res = c.avg([2, 3, 3, 4, 5], lower=2, upper=5)
assert res == pytest.approx(3.333333)
def test_avg_removes_lower_outlier_at_border():
c = Calc()
res = c.avg([2, 3, 3, 4], lower=2)
assert res == pytest.approx(3.333333)
def test_avg_removes_upper_outlier_at_border():
c = Calc()
res = c.avg([3, 3, 4, 5], upper=5)
assert res == pytest.approx(3.333333)
def test_avg_removes_upper_outliers():
c = Calc()
res = c.avg([3, 3, 4, 98, 101], upper=10)
assert res == pytest.approx(3.333333)