def testNecklace(self):
testMetal: str = "platinum"
testGem: str = "ruby"
testSize: int = 8
ring = Ring(metal=testMetal, gem=testGem, size=testSize)
self.assertEqual(ring.gem, "ruby")
self.assertEqual(ring.metal, "platinum")
ring.gem = "pearl"
ring.metal = "titanium"
ring.size = 7
self.assertEqual(ring.gem, "pearl")
self.assertEqual(ring.metal, "titanium")
ring.wear()
self.assertEqual(ring.polished, False)
ring.polish()
self.assertEqual(ring.polished, True)
