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from unittest import TestCase, main
from scrapy.http import Response, XmlResponse
from scrapy.contrib_exp.downloadermiddleware.decompression import DecompressionMiddleware
from scrapy.spider import Spider
from scrapy.tests import get_testdata
from scrapy.utils.test import assert_samelines
def _test_data(formats):
uncompressed_body = get_testdata('compressed', 'feed-sample1.xml')
test_responses = {}
for format in formats:
body = get_testdata('compressed', 'feed-sample1.' + format)
test_responses[format] = Response('http://foo.com/bar', body=body)
return uncompressed_body, test_responses
class DecompressionMiddlewareTest(TestCase):
test_formats = ['tar', 'xml.bz2', 'xml.gz', 'zip']
uncompressed_body, test_responses = _test_data(test_formats)
def setUp(self):
self.mw = DecompressionMiddleware()
self.spider = Spider('foo')
def test_known_compression_formats(self):
for fmt in self.test_formats:
rsp = self.test_responses[fmt]
new = self.mw.process_response(None, rsp, self.spider)
assert isinstance(new, XmlResponse), \
'Failed %s, response type %s' % (fmt, type(new).__name__)
assert_samelines(self, new.body, self.uncompressed_body, fmt)
def test_plain_response(self):
rsp = Response(url='http://test.com', body=self.uncompressed_body)
new = self.mw.process_response(None, rsp, self.spider)
assert new is rsp
assert_samelines(self, new.body, rsp.body)
def test_empty_response(self):
rsp = Response(url='http://test.com', body='')
new = self.mw.process_response(None, rsp, self.spider)
assert new is rsp
assert not rsp.body
assert not new.body
def tearDown(self):
del self.mw
if __name__ == '__main__':
main()
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