When Sanic has an exception in a request middleware, it fails to
save request object in `results`. In `sanic_endpoint_test`, because
it always requires `results` to have both `request` and `response` objects,
it prints traceback like attached example. It is not a user code and
it doesn't give any information to users, it is better to suppress
to print this kind of error.
To fix it, this patch insert collect hook as first request middleware
to guarantee to successfully run it always.
```
app = <sanic.sanic.Sanic object at 0x1102b5358>, method = 'get', uri = '/ping/', gather_request = True, loop = None
debug = True, request_args = (), request_kwargs = {}
_collect_request = <function sanic_endpoint_test.<locals>._collect_request at 0x11286c158>
_collect_response = <function sanic_endpoint_test.<locals>._collect_response at 0x11286c378>
def sanic_endpoint_test(app, method='get', uri='/', gather_request=True,
loop=None, debug=False, *request_args,
**request_kwargs):
results = []
exceptions = []
if gather_request:
@app.middleware
def _collect_request(request):
results.append(request)
async def _collect_response(sanic, loop):
try:
response = await local_request(method, uri, *request_args,
**request_kwargs)
results.append(response)
except Exception as e:
exceptions.append(e)
app.stop()
app.run(host=HOST, debug=debug, port=42101,
after_start=_collect_response, loop=loop)
if exceptions:
raise ValueError("Exception during request: {}".format(exceptions))
if gather_request:
try:
> request, response = results
E ValueError: not enough values to unpack (expected 2, got 1)
../sanic/sanic/utils.py:46: ValueError
```
* Adds tests for unhandled exceptions
* Adds tests for unhandled exceptions in exception handlers
* Rewrites tests to utilize pytest fixtures (No need to create the app
on import)
1. not list() -> callable()
The args of hooking parameters of Sanic have to be callables.
For wrong parameters, errors will be generated from:
```
listeners += args
```
By checking just list type, the raised error will be associated
with `[args]` instead of `args`, which is not given by users.
With this patch, the raised error will be associated with `args`.
Then users can notice their argument was neither callable nor list
in the easier way.
2. Function -> Functions in document
Regarding the parameter as a list is harmless to the user code.
But unawareness of its type can be list can limit the potent of
the user code.
