i have a folder like this
python
├── foo
│ ├── __init__.py
│ └── web
│ ├── __init__.py
│ ├── api
│ │ ├── __init__.py
│ │ └── helper_api.py
│ └── server.py
└── test_server.py
├── test_helper_api.py
The helper_api.py is like
@helper_api.route("/helper", methods=['POST'])
def helper():
data = request.get_json(force=True, silent=True, cache=True)
if data is None:
raise QueryParseException("JSON-formatted query is required, none found")
In the test_helper_api.py, I have
import ......
from foo.web.api.helper_api import QueryParseException
class TestClass(object):
@pytest.fixture
def client(self, request):
self.client = server.app.test_client()
return self.client
def test_helper_api(self, client):
with pytest.raises(QueryParseException):
client.post('/helper')
When I run the test class, the code fails at client.post, a exception was raised, however pytest failed to catch it.
---------------------------------------------------- Captured log call -----------------------------------------------------
app.py 1761 ERROR Exception on /helper [POST]
Traceback (most recent call last):
File "/Users/...personal path.../flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
.......
File "/Users/...personal path.../foo-1.0.0-py3.6.egg/foo/web/api/helper_api.py", line 12, in precheck
raise QueryParseException("JSON-formatted query is required, none found")
foo.web.api.helper_api.QueryParseException: JSON-formatted query is required, none found
why pytest is not catching this exception?
Flask test client is a test client used to test what will happen in the user side when you do a request to the endpoint. The reason why pytest doesn't and should not catch the exception is that the error happens on server side, user should not have a server side exception.
Instead, to test your QueryParseException is correctly raised in server side, you can assert the status code of client.post('/helper'). Meanwhile, in server side, you can give the error message and status code to let the client know what's wrong.