AttributeError: 对象没有属性“_type_equality_funcs”

Question

我的程序的 Unittest 模块实现出现以下错误

File "/usr/lib/python2.7/unittest/case.py", line 493, in _getAssertEqualityFunc
    asserter = self._type_equality_funcs.get(type(first))
AttributeError: 'Utility' object has no attribute '_type_equality_funcs'  

当我尝试创建一个通用类并尝试通过通用类实用程序测试函数执行时遇到错误，但使用正常的 Unittest 类实现没有错误。

下面是程序的详细说明，它执行没有任何错误

class BaseTestCase(unittest.TestCase):

    def __init__(self, methodName='runTest', param=None):
        super(BaseTestCase, self).__init__(methodName)
        self.param = param

    @staticmethod
    def parametrize(testcase_klass, param=None):

        testloader = unittest.TestLoader()
        testnames = testloader.getTestCaseNames(testcase_klass)
        suite = unittest.TestSuite()
        for name in testnames:
            suite.addTest(testcase_klass(name, param=param))
        return suite

现在我正在继承 BaseTestCase 类并调用测试用例..

     class salesgrowth_DevInt(BaseTestCase):
          def setUp(self):
                print "constructor"
                pwd = os.getcwd()

     def test4_refactoring(self,log):
             if (STATUS.lower() == "completed" or STATUS == "Actor : SUCCESS"):`enter code here`
                  self.assertEqual(os.stat(OUTPUT + '/tes1.txt').st_size, 0,
                 'employee count  is not matching with master data . Different  entries are in test1.txt\n')

到目前为止一切正常

现在，像 salesgrowth_DevInt 测试用例一样，没有其他测试用例继承 BaseTestCase 并执行 test4_refactoring 测试用例（这里例如测试用例没有删除行），为了避免重复代码，我创建了通用类实用程序包括 test4_refactoring 函数，用于所有测试用例，如 salesgrowth_DevInt 。

下面是通用实用程序类代码

import sys
import json, sys, os, argparse, commands, time, string, filecmp
import unittest

class Utility(object):
    ''' common utility class for common test cases  operations'''

    def __init__(self):
        print "constructor"
        pwd = os.getcwd()
        print "Current working directlry %s\n" % pwd
        global scriptpath
        scriptpath = os.path.join(pwd, "src/Runner/")
        maxDiff = int(80)


     def test4_refactoring(self,STATUS,BASE,ANALYSIS_DIR,OUTPUT,log):
            print "common function"
            log.write('\n')
             if (STATUS.lower() == "completed" or STATUS == "Actor : SUCCESS"):
                  self.assertEqual(os.stat(OUTPUT + '/tes1.txt').st_size, 0,
                 'employee count  is not matching with master data . Different  entries are in test1.txt\n')




     but using utility code when i try to execute below statment
     self.assertEqual(os.stat(OUTPUT + '/tes1.txt').st_size, 0,
                 'employee count  is not matching with master data . Different  entries are in test1.txt\n') 


    getting below errors


Traceback (most recent call last):
  File "/src/testCases/salesgrowth_DevInt.py", line 96, in test4_refactoring
    utils_obj.test4_refactoring(self.STATUS,self.BASE,self.ANALYSIS_DIR,self.OUTPUT,log)
  File "/src/common/Utils.py", line 436, in test4_refactoring
    'employee count  is not matching with master data. Different entries are in test1.txt\n')
  File "/usr/lib/python2.7/unittest/case.py", line 512, in assertEqual
    assertion_func = self._getAssertEqualityFunc(first, second)
  File "/usr/lib/python2.7/unittest/case.py", line 493, in _getAssertEqualityFunc
    asserter = self._type_equality_funcs.get(type(first))
AttributeError: 'Utility' object has no attribute '_type_equality_funcs'




 Please let me know if any one has any pointers or suggestion for above issue and what is wrong in above implementation.

Answer 1

self.assertEqual将仅适用于继承unittest.TestCase类的类，而您的Utility类不这样做。

我建议尝试将您的Utility方法放在BaseTestCase类下。

给它一个不以 开头的名字test_，稍后调用这个新函数来验证你对许多其他函数的断言。