def test_step_9(self):
s1 = Sphere(4)
s2 = Sphere(5)
s3 = Sphere.from_diameter(8)
self.assertEqual(s1.radius, 4)
self.assertEqual(s1.diameter, 8)
self.assertEqual(s3.diameter, 8)
self.assertEqual(s3.radius, 4)
self.assertEqual(s1.area, 201.06192982974676)
self.assertEqual(s1.volume, 268.082573106329)
self.assertEqual(str(s1), "Sphere with radius: 4")
self.assertEqual(repr(s1), "Sphere(4)")
self.assertEqual(s1 + s2, Sphere(9))
self.assertEqual(s2 * 3, Sphere(15))
self.assertEqual(3 * s2, Sphere(15))
self.assertEqual(s1 > s2, False)
self.assertEqual(s1 < s2, True)
self.assertEqual(s1 == s2, False)
self.assertEqual(s1 != s2, True)
spheres = [Sphere(3), Sphere(0), Sphere(2), Sphere(1)]
spheres.sort()
expected = [Sphere(0), Sphere(1), Sphere(2), Sphere(3)]
self.assertEqual(spheres, expected)
s1 += s2
s2 *= 2
self.assertEqual(s1, Sphere(9))
self.assertEqual(s2, Circle(10))
def test_creation_sphere_diameter():
""" Test a Sphere can be created using the diameter property """
sphere = Sphere.from_diameter(6)
assert str(sphere) == "Sphere with radius: 3.0"
assert sphere.radius == 3
assert sphere.diameter == 6
assert sphere.volume == (4 / 30) * math.pi * 3**3
assert sphere.area == 4 * math.pi * 3**2
def test_sphere():
s1 = Sphere(15)
assert str(s1) == "Sphere with radius: 15.000000"
assert repr(s1) == "Sphere(15)"
assert isclose(s1.volume, 943, rel_tol=.01)
assert isclose(s1.area, 2827.43, rel_tol=.01)
s1.volume = 7
assert isclose(s1.volume, 7, rel_tol=.01)
assert isclose(s1.radius, 1.29, rel_tol=.01)
s2 = Sphere.from_diameter(18)
assert s2.radius == 9
def test_from_diameter_sphere():
c = Sphere.from_diameter(8)
assert c.diameter == 8
assert c.radius == 4
def test_alt_constructor_sphere():
s = Sphere.from_diameter(10)
assert s.diameter == 10
assert s.radius == 5
def test_sphere_from_diameter_type():
s = Sphere.from_diameter(10)
s.radius == 5
assert isinstance(s, Sphere)
