我试图使用unittest.TestCase组成一个类层次结构。这些都不是严格单元测试我在这里运行，我试图改为测试一堆依赖于几个参数的字符串解析功能（客户 - 例如名称和缺失值）。一般的想法是简单地利用一些单元测试的便利性并保持干燥。
import unittest
import parsingfunc as i
class CustomerTestCase(unittest.TestCase):
"""Base class, most general functionality and test cases"""
def __init__(self, testname):
super(CustomerTestCase, self).__init__(testname)
# helpers
def mess_with_spaces():
...
def mess_with_case():
...
# tests
def test_case(self, value):
"""
Test that parsing function produces the same
value regardless of case of input
"""
self.assertEqual(self.func(value, missing=self.missing, customer=self.name),
self.func(self.mess_with_case(value), missing=self.missing, customer=self.name)))
...
def test_spaces(self, value):
"""
Test that parsing function produces the same
value regardless of spacing present in input
"""
...
class AisleValues(CustomerTestCase):
"""Base class for testing aisle values"""
def __init__(self, testname, customername=None, missing=None):
super(CustomerTestCase, self).__init__(testname)
self.name = customername
self.missing = missing
self.func = i.aisle_to_num
...
class PeacockAisles(AisleValues):
"""Peacock aisle parsing test cases"""
def __init__(self, testname):
super(AisleValues, self).__init__(testname, customername='peacock', missing='nan')
...
现在尝试创建这些类的实例
In [6]: a = i.CustomerTestCase('space_test')
In [7]: a.__dict__
Out[7]:
{'_cleanups': [],
'_resultForDoCleanups': None,
'_testMethodDoc': '\n Test that parsing function produces the same\n value regardless of spacing present in input\n ',
'_testMethodName': 'test_spaces',
'_type_equality_funcs': {list: 'assertListEqual',
dict: 'assertDictEqual',
set: 'assertSetEqual',
frozenset: 'assertSetEqual',
tuple: 'assertTupleEqual',
unicode: 'assertMultiLineEqual'}}
In [8]: b = i.AisleValues('test_spaces')
In [9]: b.__dict__
Out[9]:
{'_cleanups': [],
'_resultForDoCleanups': None,
'_testMethodDoc': '\n Test that parsing function produces the same\n value regardless of spacing present in input\n ',
'_testMethodName': 'test_spaces',
'_type_equality_funcs': {list: 'assertListEqual',
dict: 'assertDictEqual',
set: 'assertSetEqual',
frozenset: 'assertSetEqual',
tuple: 'assertTupleEqual',
unicode: 'assertMultiLineEqual'},
'func': <function integration.aisle_to_num>,
'missing': None,
'name': None}
In [10]: b = i.AisleValues('test_spaces', customername='peacock', missing='nan')
In [11]: b.__dict__
Out[12]:
{'_cleanups': [],
'_resultForDoCleanups': None,
'_testMethodDoc': '\n Test that parsing function produces the same\n value regardless of spacing present in input\n ',
'_testMethodName': 'test_spaces',
'_type_equality_funcs': {list: 'assertListEqual',
dict: 'assertDictEqual',
set: 'assertSetEqual',
frozenset: 'assertSetEqual',
tuple: 'assertTupleEqual',
unicode: 'assertMultiLineEqual'},
'func': <function integration.aisle_to_num>,
'missing': 'nan',
'name': 'peacock'}
In [13]: c = i.PeacockAisles('test_spaces')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-12-d4bba181b94e> in <module>()
----> 1 c = i.PeacockAisles('test_spaces')
/path/to/python.py in __init__(self, testname)
89
90 def __init__(self, testname):
---> 91 super(AisleValues, self).__init__(testname, customername='peacock', missing='nan')
92 pprint(self.__dict__)
93
TypeError: __init__() got an unexpected keyword argument 'customername'
那么这笔交易是什么？谢谢！
答案 0 :(得分：1)
您未正确拨打super。当你在super调用中命名一个类时，它应该是当前类，而不是基类（除非你真的知道你正在做什么而你想跳过它基类的实现，也支持祖父母和＃34;类。
您当前的代码AisleValues.__init__呼叫unittest.TestCase.__init__，绕过CustomerTestCase.__init__。它恰好起作用，因为CustomerTestCase.__init__没有做任何有用的事情（你可以删除它而没有任何效果），但这只是运气。当PeacockAisles.__init__调用CustomerTestCase.__init__（绕过AisleValues.__init__）时，它会失败，因为祖父母类不允许所有与其子项相同的参数。
你想：
class AisleValues(CustomerTestCase):
"""Base class for testing aisle values"""
def __init__(self, testname, customername=None, missing=None):
super(AisleValues, self).__init__(testname) # change the class named here
...
和
class PeacockAisles(AisleValues):
"""Peacock aisle parsing test cases"""
def __init__(self, testname):
super(PeacockAisles, self).__init__(testname, customername='peacock', missing='nan')
... # and on the previous line