1.unittest框架原理。
简单说一个，就是利用unnittest框架中的断言函数，判断程序执行到某一个位置的时候的是否正常，就相当于我们平时测试程序时使用到的打印数据。
2.unittest 使用需要
2.1 继承unittest.TestCase 类
2.2 每一个要测试的方法必须以test 开头（告诉unittest 这个函数测试函数）
2.3 每一个测试的时候都会调用setUp 和 tearDown这2个函数
2.4 运行unittest 框架使用 unittest.main()，还有另一种方法较麻烦懒得记。
3. 如何看执行的结果看后面的运行结果
#1.导入 unittest 库
import unittest
#测试类必须继承unittest.TestCase
class test_(unittest.TestCase):
#测试方法必须以 test_ 开头告诉unittest这个是测试方法
def setUp(self):
self.s = "hello world!"
print("test is start s is %s" % self.s)
def test_str_split(self):
self.assertEqual(self.s.split(),["hello","world!"])
def test_1(self):
self.assertEqual(4 + 6,9)
def test_2(self):
self.assertNotEqual(5 * 2,10)
def test_3(self):
self.assertTrue(4 + 5 == 9,"The result is False")
def test_4(self):
self.assertTrue(4 + 5 == 10,"assertion fails")
def test_5(self):
self.assertIn(3,[1,2,3])
def test_6(self):
self.assertNotIn(3, range(5))
def test_7(self):
self.assertAlmostEqual(22.0/7,3.14)
def test_8(self):
self.assertAlmostEqual(22.0/7,3.14,4,"test is error")
def tearDown(self):
print("test over")
if __name__ == '__main__':
unittest.main() #运行unnittest框架#运行结果
:\测试\unnittest框架>python unit
test_test.
py
test is start s is hello world! #每次运行test的时候都是调用setUp 和tearDown函数
test over
Ftest is start s is hello world!
test over
Ftest is start s is hello world!
test over
.test is start s is hello world!
test over
Ftest is start s is hello world!
test over
.test is start s is hello world!
test over
Ftest is start s is hello world!
test over
Ftest is start s is hello world!
test over
Ftest is start s is hello world!
test over
.
#只会打印报错的信息
======================================================================
FAIL: test_1 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 20, in test_1
self.assertEqual(4 + 6,9)
AssertionError: 10 != 9
======================================================================
FAIL: test_2 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 23, in test_2
self.assertNotEqual(5 * 2,10)
AssertionError: 10 == 10
======================================================================
FAIL: test_4 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 29, in test_4
self.assertTrue(4 + 5 == 10,"assertion fails")
AssertionError: False is not true : assertion fails
======================================================================
FAIL: test_6 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 35, in test_6
self.assertNotIn(3, range(5))
AssertionError: 3 unexpectedly found in range(0, 5)
======================================================================
FAIL: test_7 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 38, in test_7
self.assertAlmostEqual(22.0/7,3.14)
AssertionError: 3.142857142857143 != 3.14 within 7 places (0.0028571428571426694 difference)
======================================================================
FAIL: test_8 (__main__.test_)
----------------------------------------------------------------------
Traceback (most recent call last):
File "unittest_test.py", line 41, in test_8
self.assertAlmostEqual(22.0/7,3.14,4,"test is error") #test_8 中调用的断言函数
AssertionError: 3.142857142857143 != 3.14 within 4 places (0.0028571428571426694 difference) : test is error（这个是出错打印的字符串）
----------------------------------------------------------------------
Ran 9 tests in 0.016s
FAILED (failures=6) #一共出错的地方有8处
'''总结
运行结论
1.总共有6个出错的分别是
test_8 7 6 4 2 1 6个测试方法