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from itertools import imap
from twisted.trial import unittest
from twisted.internet import reactor
from twisted.internet.defer import Deferred
from scrapy.utils.defer import mustbe_deferred
class MustbeDeferredTest(unittest.TestCase):
def test_success_function(self):
steps = []
def _append(v):
steps.append(v)
return steps
dfd = mustbe_deferred(_append, 1)
dfd.addCallback(self.assertEqual, [1,2]) # it is [1] with maybeDeferred
steps.append(2) # add another value, that should be catched by assertEqual
return dfd
def test_unfired_deferred(self):
steps = []
def _append(v):
steps.append(v)
dfd = Deferred()
reactor.callLater(0, dfd.callback, steps)
return dfd
dfd = mustbe_deferred(_append, 1)
dfd.addCallback(self.assertEqual, [1,2]) # it is [1] with maybeDeferred
steps.append(2) # add another value, that should be catched by assertEqual
return dfd
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