def test_overlap(self):
'''
Test overlap between circles and rectangles.
'''
new_rect1 = Rectangle(100, 100)
new_rect2 = Rectangle(50, 150, 50, 50)
circ1 = Circle(25)
circ2 = Circle(30, 0, -5)
self.assertEqual(-50, new_rect1.get_overlap(new_rect2))
self.assertEqual(new_rect1.get_overlap(new_rect2),
new_rect2.get_overlap(new_rect1))
self.assertEqual(-50, circ1.get_overlap(new_rect1))
self.assertEqual(circ1.get_overlap(new_rect1),
new_rect1.get_overlap(circ1))
self.assertAlmostEqual(math.sqrt(2)*25 - 25,
circ1.get_overlap(new_rect2))
self.assertEqual(circ1.get_overlap(new_rect2),
new_rect2.get_overlap(circ1))
self.assertEqual(-50, circ1.get_overlap(circ2))
self.assertEqual(circ1.get_overlap(circ2),
circ2.get_overlap(circ1))
circ1.set_position(80, 50)
self.assertEqual(-20, circ1.get_overlap(new_rect2))
self.assertEqual(circ1.get_overlap(new_rect2),
new_rect2.get_overlap(circ1))
def test_circle_distance_from_frame(self):
'''
Test overlap between circles and frame.
'''
new_circle = Circle(20)
new_circle.set_position(160, 160)
self.assertAlmostEqual(200 - math.sqrt(2)*20 - 20,
new_circle.get_distance_from_frame(200), 2)
new_circle.set_position(420, 180)
self.assertAlmostEqual(-60, new_circle.get_distance_from_frame(200), 2)
new_circle.set_position(180 + 1 / math.sqrt(2) * 180,
180 + 1 / math.sqrt(2) * 180)
self.assertAlmostEqual(0, new_circle.get_distance_from_frame(200), 2)
