我正在尝试编写一个单元测试,以确保在必要时引发HTTPException。这是测试:
import unittest
from requests import HTTPError
import pyport
# Code omitted...
def test_bad_item_type(self):
"""A bad item type should raise a HTTPError"""
test_type = 'bad'
test_id = 1986134
self.assertRaises(HTTPError, pyport.get_item(test_type, test_id))
产生以下内容:
ERROR: test_bad_item_type (__main__.TestPyportFunctions) A bad item
type should raise requests.HTTPError
----------------------------------------------------------------------
Traceback (most recent call last): File "./tests.py", line 65, in
test_bad_item_type
self.assertRaises(HTTPError, pyport.get_item(test_type, test_id)) File "/home/sean/workspace/pyport/pyport.py", line 54, in get_item
response.raise_for_status() File "/usr/local/lib/python2.7/dist-packages/requests/models.py", line 741, fin raise_for_status
raise HTTPError('%s Client Error' % self.status_code) HTTPError: 404 Client Error
引发了异常,但测试未捕获到异常。这类似于this question中发生的情况,但并不完全相同。有人可以告诉我我所缺少的吗?
最佳答案
它应该是:
self.assertRaises(HTTPError, pyport.get_item, test_type, test_id)
请参阅
assertRaises
的签名:assertRaises(exception, callable, *args, **kwds)
之所以这样定义,是因为如果您按照自己的方式进行操作,Python解释器首先会调用
pyport.get_item(test_type, test_id)
,然后将其结果传递给assertRaises。结果为assertRaises
根本不会被调用,并且不会捕获到异常。现在,如果assertRaises可以访问该函数及其参数,则可以调用该函数本身并捕获相应的异常。关于python - assertRises失败,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/8962040/