def test_area():
c = Circle(2)
assert c.area == 12.566370614359172
s = Sphere(2)
assert s.area == 50.26548245743669
s = Sphere(4)
assert round(s.area, 5) == 201.06193
with pytest.raises(AttributeError):
c.area = 42
s.area = 42
def test_sphere_area():
s = Sphere(3)
assert s.area == 4 * pi * (3 ** 2)
# Suface area should not be able to be set
try:
s.area = 10
except AttributeError:
pass
else:
assert False
def test_area():
s = Sphere(2)
assert s.area == approx(50.2654824)
with pytest.raises(AttributeError):
s.area = 42
def test_sphere_area():
s = Sphere(4)
with pytest.raises(NotImplementedError):
s.area()
def test_sphere_volume_set():
""" Verify sphere volume cannot be set by user """
a_sphere = Sphere(5)
with pytest.raises(AttributeError):
a_sphere.area = 25