test_unit.py 文件源码

def test_and(self):
        code = "(and (do (print \"a\") 1) (do (print \"b\") 0) (do (print \"c\") 1))"
        tree = self.parser.parse_line(code)
        io = StringIO()
        sys.stdout = io
        result = self.runner.evaluate(tree[0])
        sys.stdout = sys.__stdout__
        self.assertEqual(result, 0)
        self.assertEqual(io.getvalue(), "a\nb\n")
        code = "(and True False True)"
        tree = self.parser.parse_line(code)
        result = self.runner.evaluate(tree[0])
        self.assertEqual(result, False)
        code = "(and True 1 4)"
        tree = self.parser.parse_line(code)
        result = self.runner.evaluate(tree[0])
        self.assertEqual(result, 4)