def test_copy(self):
block = BasicBlock([Instr("NOP")])
next_block = BasicBlock()
block.next_block = next_block
self.assertEqual(block, block.copy())
self.assertIs(next_block, block.copy().next_block)
def test_slice(self):
block = BasicBlock([Instr("NOP")])
next_block = BasicBlock()
block.next_block = next_block
self.assertEqual(block, block[:])
self.assertIs(next_block, block[:].next_block)