20170928-2 单元测试，结对

import unittest
from f4 import *
class TestMathFunc(unittest.TestCase):
    def test_f4(self):
        pass
    def test_f4_answer(self):
        print("_f4_answer函数单元测试开始：")
        _eq = input("输入一个四则运算：")
        _eq_ans = input("输入一个正确的答案：")
        self.assertEqual(_eq_ans ,f4()._f4_answer(eq = _eq))
        print("_f4_answer函数单元测试结束。")
        print("OK")
    def test_f4_input(self):
        print("_f4_input函数单元测试开始：")
        self.assertEqual(0,f4()._f4_input())
        print("_f4_input函数单元测试结束。")
        print("OK")
    def test_f4_integer_parser(self):
        print("_f4_integer_parser函数单元测试开始：")
        x = input("输入命令行参数：")
        self.assertEqual(0,f4()._f4_integer_parser(x))
        print("_f4_integer_parser函数单元测试结束。")
        print("OK")
if __name__ ==  "__main__":
    unittest.main()

    def _f4_answer(self,eq):
        from fractions import Fraction as f
        _answer = f(eval(eq)).limit_denominator(1000)
        _answer = str(_answer)
        return(_answer)

    def _f4_input(self):
        try:
            _y = 0
            _n = 0
            for i in range(20):
                _eq = f4()._f4()
                print(_eq, "=")
                _ans_right = f4()._f4_answer(eq = _eq)
                _ans = input("?")
                if _ans == _ans_right:
                    print("答对了，你真是个天才！")
                    _y = _y + 1
                else:
                    print("你再想想吧，答案似乎是", _ans_right, "喔！")
                    _n = _n + 1
            print("你一共答对", _y, "道题，一共20道题。")
        except:
            print("输入有误")
        return (0)

    def _f4_integer_parser(self,x):
        _p = "请输入正整数。"
        try:
            x = int(x)
            if x >= 0:
                for i in range(x):
                    _eq = f4()._f4()
                    _right = f4()._f4_answer(eq = _eq)
                    _eq = _eq + "="
                    print(_eq.ljust(40), _right)
            else:
                print(_p)
        except:
            print(_p)
        return(0)