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94 lines
2.7 KiB
Python
94 lines
2.7 KiB
Python
from twisted.trial import unittest
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from scrapy.settings import Settings
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from scrapy.exceptions import NotConfigured
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from scrapy.middleware import MiddlewareManager
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import six
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class M1(object):
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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def process(self, response, request, spider):
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pass
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class M2(object):
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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pass
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class M3(object):
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def process(self, response, request, spider):
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pass
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class MOff(object):
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def open_spider(self, spider):
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pass
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def close_spider(self, spider):
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pass
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def __init__(self):
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raise NotConfigured
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class TestMiddlewareManager(MiddlewareManager):
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@classmethod
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def _get_mwlist_from_settings(cls, settings):
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return ['tests.test_middleware.%s' % x for x in ['M1', 'MOff', 'M3']]
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def _add_middleware(self, mw):
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super(TestMiddlewareManager, self)._add_middleware(mw)
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if hasattr(mw, 'process'):
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self.methods['process'].append(mw.process)
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class MiddlewareManagerTest(unittest.TestCase):
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def test_init(self):
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m1, m2, m3 = M1(), M2(), M3()
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mwman = TestMiddlewareManager(m1, m2, m3)
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self.assertEqual(mwman.methods['open_spider'], [m1.open_spider, m2.open_spider])
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self.assertEqual(mwman.methods['close_spider'], [m2.close_spider, m1.close_spider])
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self.assertEqual(mwman.methods['process'], [m1.process, m3.process])
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def test_methods(self):
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mwman = TestMiddlewareManager(M1(), M2(), M3())
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if six.PY2:
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self.assertEqual([x.im_class for x in mwman.methods['open_spider']],
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[M1, M2])
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self.assertEqual([x.im_class for x in mwman.methods['close_spider']],
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[M2, M1])
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self.assertEqual([x.im_class for x in mwman.methods['process']],
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[M1, M3])
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else:
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self.assertEqual([x.__self__.__class__ for x in mwman.methods['open_spider']],
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[M1, M2])
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self.assertEqual([x.__self__.__class__ for x in mwman.methods['close_spider']],
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[M2, M1])
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self.assertEqual([x.__self__.__class__ for x in mwman.methods['process']],
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[M1, M3])
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def test_enabled(self):
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m1, m2, m3 = M1(), M2(), M3()
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mwman = MiddlewareManager(m1, m2, m3)
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self.assertEqual(mwman.middlewares, (m1, m2, m3))
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def test_enabled_from_settings(self):
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settings = Settings()
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mwman = TestMiddlewareManager.from_settings(settings)
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classes = [x.__class__ for x in mwman.middlewares]
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self.assertEqual(classes, [M1, M3])
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