python unintest单元测试框架提供了一整套内置的断言方法。
1. 如果断言失败，则抛出一个AssertionError,并标识该测试为失败状态。
2. 如果成功，则标识该测试为成功状态。
但存在一个缺点，测试用例中含有多个断言时，一个断言失败，抛出异常，后续断言不再继续执行，也就无从知道后面断言结果。如果使用Python+pytest框架，pytest中的pytest-assume 插件，一个可以允许pytest测试用例中执行多个失败的断言的插件（即断言1，断言2，断言3都失败的情况下，三个断言都能被执行。针对unittest无对应自带的方法可以优化断言失败的问题，找了好些文档，没发现比较好的方法，朋友推荐说可以使用subtest方法，资料比较少没找到好的运用方法，以后继续尝试吧，有了会贴上来，现在先来介绍重写unittest断言：
1 """
2 # File : checkPoint.py 3 # Time ：2021/4/20 14:05 4 # Author ：DY 5 # version ：V1.0.0 6 # Description：重写unittest断言方法,解决断言失败不再继续执行的问题 7 """
8 import unittest
11 class CheckPoint(unittest.TestCase):
13 def __init__(self, methodName='runTest'): 14 super(CheckPoint, self).__init__(methodName) 15 self._testMethodName = methodName 16 self.flag = 0 17 self.msg = [] 18
19 # 基本的布尔断言：要么正确，要么错误的验证
20 def checkAssertEqual(self, arg1, arg2, msg=None): 21 """ 验证arg1=arg2，不等则fail"""
22 try: 23 self.assertEqual(arg1, arg2, msg) 24 except Exception as e: 25 self.flag += 1
26 self.msg.append("\n{}".format(msg)) 27 print(e) 28
29 def checkAssertNotEqual(self, arg1, arg2, msg=None): 30 """ 验证arg1 != arg2, 相等则fail"""
31 try: 32 self.assertNotEqual(arg1, arg2, msg) 33 except Exception as e: 34 self.flag += 1
35 self.msg.append("\n{}".format(msg)) 36 print(e) 37
38 def checkAssertTrue(self, expr, msg=None): 39 """验证expr是true，如果为false，则fail"""
40 try: 41 self.assertTrue(expr, msg) 42 except Exception as e: 43 self.flag += 1
44 self.msg.append("\n{}".format(msg)) 45 print(e) 46
47 def checkAssertFalse(self, expr, msg=None): 48 """ 验证expr是false，如果为true，则fail"""
49 try: 50 self.assertFalse(expr, msg) 51 except Exception as e: 52 self.flag += 1
53 self.msg.append("\n{}".format(msg)) 54 print(e) 55
128 # 比较断言：比较两个变量的值
129 def checkAssertGreater(self, first, second, msg=None): 130 """ 验证first > second，否则fail"""
131 try: 132 self.assertGreater(first, second) 133 except Exception as e: 134 self.flag += 1
135 self.msg.append("\n{}".format(msg)) 136 print(e) 137
138 def checkAssertGreaterEqual(self, first, second, msg=None): 139 """验证first >= second，否则fail"""
140 try: 141 self.assertGreaterEqual(first, second) 142 except Exception as e: 143 self.flag += 1
144 self.msg.append("\n{}".format(msg)) 145 print(e) 146
147 def checkAssertLess(self, first, second, msg=None): 148 """验证first < second，否则fail"""
149 try: 150 self.assertLess(first, second) 151 except Exception as e: 152 self.flag += 1
153 self.msg.append("\n{}".format(msg)) 154 print(e) 155
156 def checkAssertLessEqual(self, first, second, msg=None): 157 """验证first <= second，否则fail"""
158 try: 159 self.assertLessEqual(first, second) 160 except Exception as e: 161 self.flag += 1
162 self.msg.append("\n{}".format(msg)) 163 print(e) 164
165 def checkTestResult(self): 166 """获取用例执行结果，断言flag是否为0，不为0说明测试用例中存在断言失败"""
167 return self.assertEqual(self.flag, 0, "{}".format(self.msg))
测试用例的引用：测试用例继承父类checkPoint，使用封装的测试用例
1 from util.checkPoint import CheckPoint 2
3 class HomePage(CheckPoint): 4 def test_001(self): 5 self.checkAssertEqual(1, 1, "断言失败") 6 self.checkAssertEqual(1, 2, "断言失败") 7 self.checkAssertEqual(1, 3, "断言不咋正确") 8 self.checkTestResult() 9 if __name__ == '__main__': 10 unittest.main()
执行结果：
1 != 2 : 断言失败 1 != 3 : 断言不咋正确 ['\n断言失败', '\n断言不咋正确'] 0 != 2 Expected :2 Actual :0 <Click to see difference> Traceback (most recent call last): File "D:\DmallAutoPyCMSDY\question.py", line 235, in test_001 self.checkTestResult() File "D:\DmallAutoPyCMSDY\util\checkPoint.py", line 167, in checkTestResult return self.assertEqual(self.flag, 0, "{}".format(self.msg)) AssertionError: 2 != 0 : ['\n断言失败', '\n断言不咋正确']
用例test_001的第2/3条断言都是失败的，通过执行结果我们可以看出，第2条断言执行失败后，继续执行第3条用例，并且msg把两次断言失败的异常信息都有收集到，所以此方法可行。
码字不易，如有转载请注明出处，感谢~