import unittest
import random

class MyClass(object):
    @classmethod
    def sum(cls,a,b):
        return a+b
    @classmethod
    def div(cls,a,b):
        return a/b
    @classmethod
    def return_None(cls):
        return None

class MyTest(unittest.TestCase):

    def test_assertEqual(self):
        
 
#相等
        try:
            a,b=1,2
            sum = 13
            self.assertEqual(a+b,sum)
        except AssertionError as e:
            print(e)
    def test_assertNotEqual(self):
        #不相等
        try:
            a,b=4,2
            div=4
            self.assertNotEqual(a/b,div)
        
 
except AssertionError as e:
            print(e)

    def test_assertFalse(self):
        #假
        try:
            self.assertFalse(1==2)
        except AssertionError as e:
            print(e)
    def test_assertTrue(self):
        #真
        try:
            self.assertTrue(1==1)
        except
 
 AssertionError as e:
            print(e)
    def test_assertIs(self):
        try:
            a=1
            b=a
            self.assertIs(a,b)
        except AssertionError as e:
            print(e)



if __name__=='__main__':
    unittest.main()