Source code for falcon.testing.resource

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"""Mock resource classes.

This module contains mock resource classes and associated hooks for use
in Falcon framework tests. The classes and hooks may be referenced
directly from the `testing` package::

    from falcon import testing

    resource = testing.SimpleTestResource()

"""

from json import dumps as json_dumps

import falcon


[docs]def capture_responder_args(req, resp, resource, params): """Before hook for capturing responder arguments. Adds the following attributes to the hooked responder's resource class: * `captured_req` * `captured_resp` * `captured_kwargs` In addition, if the capture-req-body-bytes header is present in the request, the following attribute is added: * `captured_req_body` Including the capture-req-media header in the request (set to any value) will add the following attribute: * `capture-req-media` """ resource.captured_req = req resource.captured_resp = resp resource.captured_kwargs = params resource.captured_req_media = None resource.captured_req_body = None num_bytes = req.get_header('capture-req-body-bytes') if num_bytes: resource.captured_req_body = req.stream.read(int(num_bytes)) elif req.get_header('capture-req-media'): resource.captured_req_media = req.get_media()
[docs]async def capture_responder_args_async(req, resp, resource, params): """Before hook for capturing responder arguments. An asynchronous version of :meth:`~falcon.testing.capture_responder_args`. """ resource.captured_req = req resource.captured_resp = resp resource.captured_kwargs = params resource.captured_req_media = None resource.captured_req_body = None num_bytes = req.get_header('capture-req-body-bytes') if num_bytes: resource.captured_req_body = await req.stream.read(int(num_bytes)) elif req.get_header('capture-req-media'): resource.captured_req_media = await req.get_media()
[docs]def set_resp_defaults(req, resp, resource, params): """Before hook for setting default response properties. This hook simply sets the the response body, status, and headers to the `_default_status`, `_default_body`, and `_default_headers` attributes that are assumed to be defined on the resource object. """ if resource._default_status is not None: resp.status = resource._default_status if resource._default_body is not None: resp.text = resource._default_body if resource._default_headers is not None: resp.set_headers(resource._default_headers)
[docs]async def set_resp_defaults_async(req, resp, resource, params): """Wrap :meth:`~falcon.testing.set_resp_defaults` in a coroutine.""" set_resp_defaults(req, resp, resource, params)
[docs]class SimpleTestResource: """Mock resource for functional testing of framework components. This class implements a simple test resource that can be extended as needed to test middleware, hooks, and the Falcon framework itself. Only noop ``on_get()`` and ``on_post()`` responders are implemented; when overriding these, or adding additional responders in child classes, they can be decorated with the :py:meth:`falcon.testing.capture_responder_args` hook in order to capture the *req*, *resp*, and *params* arguments that are passed to the responder. Responders may also be decorated with the :py:meth:`falcon.testing.set_resp_defaults` hook in order to set *resp* properties to default *status*, *body*, and *header* values. Keyword Arguments: status (str): Default status string to use in responses body (str): Default body string to use in responses json (JSON serializable): Default JSON document to use in responses. Will be serialized to a string and encoded as UTF-8. Either *json* or *body* may be specified, but not both. headers (dict): Default set of additional headers to include in responses Attributes: called (bool): Whether or not a req/resp was captured. captured_req (falcon.Request): The last Request object passed into any one of the responder methods. captured_resp (falcon.Response): The last Response object passed into any one of the responder methods. captured_kwargs (dict): The last dictionary of kwargs, beyond ``req`` and ``resp``, that were passed into any one of the responder methods. """ def __init__(self, status=None, body=None, json=None, headers=None): self._default_status = status self._default_headers = headers if json is not None: if body is not None: msg = 'Either json or body may be specified, but not both' raise ValueError(msg) self._default_body = json_dumps(json, ensure_ascii=False) else: self._default_body = body self.captured_req = None self.captured_resp = None self.captured_kwargs = None @property def called(self): return self.captured_req is not None @falcon.before(capture_responder_args) @falcon.before(set_resp_defaults) def on_get(self, req, resp, **kwargs): pass @falcon.before(capture_responder_args) @falcon.before(set_resp_defaults) def on_post(self, req, resp, **kwargs): pass
class SimpleTestResourceAsync(SimpleTestResource): """Mock resource for functional testing of ASGI framework components. This class implements a simple test resource that can be extended as needed to test middleware, hooks, and the Falcon framework itself. It is identical to SimpleTestResource, except that it implements asynchronous responders for use with the ASGI interface. Only noop ``on_get()`` and ``on_post()`` responders are implemented; when overriding these, or adding additional responders in child classes, they can be decorated with the :py:meth:`falcon.testing.capture_responder_args` hook in order to capture the *req*, *resp*, and *params* arguments that are passed to the responder. Responders may also be decorated with the :py:meth:`falcon.testing.set_resp_defaults` hook in order to set *resp* properties to default *status*, *body*, and *header* values. Keyword Arguments: status (str): Default status string to use in responses body (str): Default body string to use in responses json (JSON serializable): Default JSON document to use in responses. Will be serialized to a string and encoded as UTF-8. Either *json* or *body* may be specified, but not both. headers (dict): Default set of additional headers to include in responses Attributes: called (bool): Whether or not a req/resp was captured. captured_req (falcon.Request): The last Request object passed into any one of the responder methods. captured_resp (falcon.Response): The last Response object passed into any one of the responder methods. captured_kwargs (dict): The last dictionary of kwargs, beyond ``req`` and ``resp``, that were passed into any one of the responder methods. """ @falcon.before(capture_responder_args_async) @falcon.before(set_resp_defaults_async) async def on_get(self, req, resp, **kwargs): pass @falcon.before(capture_responder_args_async) @falcon.before(set_resp_defaults_async) async def on_post(self, req, resp, **kwargs): pass