Python 如何使用requests\u mock来确保调用了正确的会话?
我的情况与此类似:Python 如何使用requests\u mock来确保调用了正确的会话?,python,python-3.x,unit-testing,python-requests,Python,Python 3.x,Unit Testing,Python Requests,我的情况与此类似: import unittest import requests_mock import requests import mock class ClassUnderTest: def __init__(self): self.session = requests.Session() self.foo_url = 'http://google.com' def do_foo(self): return self
import unittest
import requests_mock
import requests
import mock
class ClassUnderTest:
def __init__(self):
self.session = requests.Session()
self.foo_url = 'http://google.com'
def do_foo(self):
return self.session.get(self.foo_url)
def do_foo_failing(self):
# I want to prevent accidentally doing this sort of operation
# instead of reusuing self.session
return requests.get(self.foo_url)
我想确保这些方法正确执行,但也要确保使用的是self.session
对象。实际上,我遇到了这个问题,因为我错误地添加了一个requests.get
调用,而不是重新使用同一个会话
但是,这意味着这样的测试实际上不会测试此功能:
class TestClassUnderTest(unittest.TestCase):
@requests_mock.mock()
def test_do_foo_should_pass(self, m):
c = ClassUnderTest()
m.get('http://google.com', status_code=200)
r = c.do_foo()
self.assertEqual(200, r.status_code)
self.assertEqual(m.call_count, 1)
@requests_mock.mock()
def test_do_foo_should_fail(self, m):
c = ClassUnderTest()
m.get('http://google.com', status_code=200)
r = c.do_foo_failing()
self.assertEqual(200, r.status_code)
self.assertEqual(m.call_count, 1)
我曾经考虑过用mock替换self.session,但是我还必须在mock上设置status\u代码(在我的真实代码示例中,我还需要添加mock,以便代码正确使用响应函数)
有没有一种方法可以使用requests\u mock来有效地保证只使用
self.session
(在本例中不是requests.get
)以下工作是将所有request.session
函数包装到一个MockClass中,并使用一个包装器跟踪它们的使用情况:
class MockSession:
def __init__(self):
self.session = requests.Session()
self._called_methods = {}
def session_decorator(f):
def func(*args, **kwargs):
if f.__name__ not in self._called_methods:
self._called_methods[f.__name__] = 1
else:
self._called_methods[f.__name__] += 1
return f(*args, **kwargs)
return func
for name, f in inspect.getmembers(self.session):
if inspect.ismethod(f):
setattr(self, name, session_decorator(f))
使用此模拟后,您可以访问\u called\u methods
值来检查单个方法的调用频率。注意,由于requests_mock的工作方式,您必须在运行时执行此操作(而不是通过简单地扩展具有类似功能的requests.Session类在加载时)
修改测试代码会导致:
class TestClassUnderTest(unittest.TestCase):
@requests_mock.mock()
def test_do_foo_should_pass(self, m):
c = ClassUnderTest()
c.session = MockSession()
m.get('http://google.com', status_code=200)
r = c.do_foo()
self.assertEqual(200, r.status_code)
self.assertEqual(m.call_count, 1)
self.assertEqual(c.session._called_count['GET'], 1)
@requests_mock.mock()
def test_do_foo_should_fail(self, m):
c = ClassUnderTest()
c.session = MockSession()
m.get('http://google.com', status_code=200)
r = c.do_foo_failing()
self.assertEqual(200, r.status_code)
self.assertEqual(m.call_count, 1)
# This will fail with an attribute error
# because that function was never invoked on the mock session
self.assertEqual(c.session._called_count['GET'], 1)