def test_mul_by_zero_raises_exception():
c = Calc()
with pytest.raises(ValueError):
c.mul(3, 0)
def test_div_two_numbers_float():
c = Calc()
res = c.div(13, 2)
assert res == 6.5
def test_dev_by_zero_returns_inf():
c = Calc()
res = c.div(5, 0)
assert res == "inf"
def test_mul_two_numbers():
c = Calc()
res = c.mul(6, 4)
assert res == 24
def test_mul_many_numbers():
s = range(1, 10)
assert Calc.mul(*s) == 362880
def test_avg_uppper_threshold_is_included():
c = Calc()
res = c.avg([2, 5, 12, 98], ut=98)
assert res == 29.25
def test_subtract_two_numbers():
c = Calc()
res = c.sub(10, 3)
assert res == 7
def test_add_two_numbers():
c = Calc()
res = c.add(4, 5)
assert res == 9
def test_add_three_numbers():
c = Calc()
res = c.add(4, 5, 6)
assert res == 15
def test_avg_manages_zero_value_lower_outlier():
c = Calc()
res = c.avg([-1, 0, 1], lt=0)
assert res == 0.5
def test_avg_manages_zero_value_upper_outlier():
c = Calc()
res = c.avg([-1, 0, 1], ut=0)
assert res == -0.5
def test_avg_manages_empty_list_before_outlier_removal():
c = Calc()
res = c.avg([], lt=15, ut=90)
assert res == 0
def test_avg_empty_list():
c = Calc()
res = c.avg([])
assert res == 0
def test_avg_lower_threshold_is_included():
c = Calc()
res = c.avg([2, 5, 12, 98], lt=2)
assert res == 29.25
def test_avg_correct_average():
c = Calc()
res = c.avg([2, 5, 12, 98])
assert res == 29.25
def test_add_many_numbers():
s = range(100)
assert Calc().add(*s) == 4950
def test_avg_removes_upper_outliners():
c = Calc()
res = c.avg([2, 5, 12, 98], ut=90)
assert res == pytest.approx(6.333333)
def test_acg_removes_lower_outliers():
c = Calc()
res = c.avg([2, 5, 12, 98], lt=10)
assert res == pytest.approx(55)