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import unittest
from scrapy.http import Request
from scrapy.spider import Spider
from scrapy.utils.reqser import request_to_dict, request_from_dict
class RequestSerializationTest(unittest.TestCase):
def setUp(self):
self.spider = TestSpider()
def test_basic(self):
r = Request("http://www.example.com")
self._assert_serializes_ok(r)
def test_all_attributes(self):
r = Request("http://www.example.com",
callback='parse_item',
errback='handle_error',
method="POST",
body="some body",
headers={'content-encoding': 'text/html; charset=latin-1'},
cookies={'currency': 'usd'},
encoding='latin-1',
priority=20,
meta={'a': 'b'})
self._assert_serializes_ok(r)
def test_latin1_body(self):
r = Request("http://www.example.com", body="\xa3")
self._assert_serializes_ok(r)
def test_utf8_body(self):
r = Request("http://www.example.com", body="\xc2\xa3")
self._assert_serializes_ok(r)
def _assert_serializes_ok(self, request, spider=None):
d = request_to_dict(request, spider=spider)
request2 = request_from_dict(d, spider=spider)
self._assert_same_request(request, request2)
def _assert_same_request(self, r1, r2):
self.assertEqual(r1.url, r2.url)
self.assertEqual(r1.callback, r2.callback)
self.assertEqual(r1.errback, r2.errback)
self.assertEqual(r1.method, r2.method)
self.assertEqual(r1.body, r2.body)
self.assertEqual(r1.headers, r2.headers)
self.assertEqual(r1.cookies, r2.cookies)
self.assertEqual(r1.meta, r2.meta)
self.assertEqual(r1._encoding, r2._encoding)
self.assertEqual(r1.priority, r2.priority)
self.assertEqual(r1.dont_filter, r2.dont_filter)
def test_callback_serialization(self):
r = Request("http://www.example.com", callback=self.spider.parse_item, \
errback=self.spider.handle_error)
self._assert_serializes_ok(r, spider=self.spider)
def test_unserializable_callback1(self):
r = Request("http://www.example.com", callback=lambda x: x)
self.assertRaises(ValueError, request_to_dict, r)
self.assertRaises(ValueError, request_to_dict, r, spider=self.spider)
def test_unserializable_callback2(self):
r = Request("http://www.example.com", callback=self.spider.parse_item)
self.assertRaises(ValueError, request_to_dict, r)
class TestSpider(Spider):
name = 'test'
def parse_item(self, response):
pass
def handle_error(self, failure):
pass
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