def test_diameter(self):
radius = randint(1,100)
diameter = radius * 2
obj = Circle(radius)
self.assertEquals(obj.diameter(), diameter)
def test_area(self):
radius = randint(1,100)
area = pi * (radius ** 2)
obj = Circle(radius)
self.assertEquals(obj.area(), area)
def test_circumference(self):
radius = randint(1,100)
circumference = 2 * pi * radius
obj = Circle(radius)
self.assertEquals(obj.circumference(), circumference)
