我正在使用unittest并使用mockito来为Flask应用编写单元测试，以模拟需要服务器启动并运行的服务。
但是，我无法弄清楚如何模拟服务器。我遇到一些错误。
以下是代码段：
node.py
@app.route('/transaction', methods = ["POST"])
def transaction():
req = request.get_json()
print("\nreq")
i = bitcoin.addTransaction(req)
if req['purpose'] != 'redeem':
users = getColumn(sheet_u,0)
index = users.index(req['recipient'])
user = getRow(sheet_u,index)
hasPoints = int(user[labels_u.index("POINTS")])
hasPoints += req['amount']
setCell(sheet_u, index, labels_u.index("POINTS"), hasPoints)
wb.save("db.xlsx")
else:
users = getColumn(sheet_u,0)
index = users.index(req['sender'])
user = getRow(sheet_u,index)
hasPoints = int(user[labels_u.index("POINTS")])
hasPoints -= req['amount']
setCell(sheet_u, index, labels_u.index("POINTS"), hasPoints)
wb.save("db.xlsx")
r = requests.get(url = bitcoin.currentNodeUrl+"/save")
return jsonify({"note":"New transaction will be added to block "+str(i)})
@app.route('/transaction/broadcast', methods = ["POST"])
def transactionBroadcast():
check = True
failure = ""
req = request.get_json()
# Hiding some methods that change the value of check flag
if check:
newTransaction = bitcoin.createNewTransaction(req['amount'],req['sender'],req['recipient'],req['purpose'],time.time())
bitcoin.addTransaction(newTransaction)
promises = []
for node in bitcoin.networkNodes:
response = ""
try:
r = requests.post(url=node+"/transaction",json=newTransaction) #this line throws error
response = r.text #program control doesn't come here
print(newTransaction)
print("\n")
print(response)
except requests.exceptions.ConnectionError:
response = "{\"note\":\"The node is unavailable. It will sync itself later on.\"}"
if 'note' in json.loads(response):
promises.append(json.loads(response))
if len(promises) == len(bitcoin.networkNodes):
r = requests.get(url = bitcoin.currentNodeUrl+"/save")
return jsonify({"note":"Transaction broadcasted successfully"})
else:
return jsonify({"fail":"Invalid transaction. "+failure})
if __name__ == '__main__':
bitcoin = Blockchain(sys.argv[1])
app.run(port=sys.argv[1])
test_t2.py
from node import app
from flask import json
import unittest
import node
import requests
from mockito import when, mock, unstub
class TestSearch(unittest.TestCase):
print("inside TEST class")
def test_transactionBroadcast(self):
node.bitcoin = node.Blockchain('5000')
response = mock({"note": "New transaction will be added to block 5"})
when(requests).post('http://localhost:5001/transaction', strict = False ).thenReturn(response)
data1 = {
"sender" : "ph1000005",
"recipient" : "TIAA",
"amount" : 1,
"purpose" : "redeem"
}
response = app.test_client().post(
'/transaction/broadcast',
json = data1,
content_type='application/json',
)
print("running TransactionBroadcast test")
print(response)
self.assertEqual(response.get_json(), {
# 'fail': "Invalid transaction. This user doesn't exist. Check userid again."
"note": "Transaction broadcasted successfully"
})
unstub()
if __name__ == '__main__':
unittest.main()
错误日志
C:\POC>coverage run test_t2.py
inside TEST class
[2018-12-12 19:58:22,181] ERROR in app: Exception on /transaction/broadcast [POST]
Traceback (most recent call last):
File "c:\program files\python36\lib\site-packages\flask\app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "c:\program files\python36\lib\site-packages\flask\app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "c:\program files\python36\lib\site-packages\flask\app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "c:\program files\python36\lib\site-packages\flask\_compat.py", line 35, in reraise
raise value
File "c:\program files\python36\lib\site-packages\flask\app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "c:\program files\python36\lib\site-packages\flask\app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\POC\node.py", line 230, in transactionBroadcast
r = requests.post(url=node+"/transaction",json=newTransaction)
File "c:\program files\python36\lib\site-packages\mockito\mocking.py", line 89, in new_mocked_method
self, method_name, *args, **kwargs)
File "c:\program files\python36\lib\site-packages\mockito\mocking.py", line 44, in remembered_invocation_builder
return invoc(*args, **kwargs)
File "c:\program files\python36\lib\site-packages\mockito\invocation.py", line 103, in __call__
""" % (self, "\n ".join(str(invoc) for invoc in stubbed_invocations)))
mockito.invocation.InvocationError:
You called
post(url='http://localhost:5001/transaction', json={'amount': 1, 'purpose': 'redeem', 'recipient': 'TIAA', 'sender': 'ph1000005', 'timestamp': 1544624902.1440911, 'transactionId': 'd919ffb4080f47e890957f3f3edc97a1'}),
which is not expected. Stubbed invocations are:
post('http://localhost:5001/transaction', strict=False)
(Set strict to False to bypass this check.)
running TransactionBroadcast test
<Response streamed [500 INTERNAL SERVER ERROR]>
F
======================================================================
FAIL: test_transactionBroadcast (__main__.TestSearch)
----------------------------------------------------------------------
Traceback (most recent call last):
File "test_t2.py", line 49, in test_transactionBroadcast
"note": "Transaction broadcasted successfully"
AssertionError: None != {'note': 'Transaction broadcasted successfully'}
----------------------------------------------------------------------
Ran 1 test in 0.682s
FAILED (failures=1)
现在，我不确定我在做什么错。路由/transaction中有对/transaction/broadcast的内部路由调用，但失败。
由于这是一个单元测试，因此不需要启动服务器即可运行。并且路由正在呼叫localhost
关于如何处理它的任何想法？
答案 0 :(得分：1)
基本上，存根错误消息会告诉您存根签名
when(requests).post('http://localhost:5001/transaction', strict = False ).thenReturn(response)
是错误的。
注意1：使用strict时，必须像这样when进入when(requests, strict=False)。但不严格通常不是您想要的。
相反，您可以修复存根，例如：
when(requests).post(url='http://localhost:5001/transaction', ...).thenReturn(response)
# or for python2
from mockito import kwargs
when(requests).post(url='http://localhost:5001/transaction', **kwargs).thenReturn(response)