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#!/usr/bin/env python
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# encoding: utf-8
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"""Tests for pendingdeferred.py"""
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__docformat__ = "restructuredtext en"
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#-------------------------------------------------------------------------------
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# Copyright (C) 2008 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# Imports
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#-------------------------------------------------------------------------------
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try:
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from twisted.internet import defer
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from twisted.python import failure
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from IPython.testing.util import DeferredTestCase
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import IPython.kernel.pendingdeferred as pd
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from IPython.kernel import error
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from IPython.kernel.util import printer
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except ImportError:
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import nose
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raise nose.SkipTest("This test requires zope.interface, Twisted and Foolscap")
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class Foo(object):
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def bar(self, bahz):
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return defer.succeed('blahblah: %s' % bahz)
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class TwoPhaseFoo(pd.PendingDeferredManager):
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def __init__(self, foo):
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self.foo = foo
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pd.PendingDeferredManager.__init__(self)
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@pd.two_phase
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def bar(self, bahz):
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return self.foo.bar(bahz)
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class PendingDeferredManagerTest(DeferredTestCase):
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def setUp(self):
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self.pdm = pd.PendingDeferredManager()
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def tearDown(self):
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pass
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def testBasic(self):
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dDict = {}
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# Create 10 deferreds and save them
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for i in range(10):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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dDict[did] = d
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# Make sure they are begin saved
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for k in dDict.keys():
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self.assert_(self.pdm.quick_has_id(k))
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# Get the pending deferred (block=True), then callback with 'foo' and compare
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for did in dDict.keys()[0:5]:
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d = self.pdm.get_pending_deferred(did,block=True)
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dDict[did].callback('foo')
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d.addCallback(lambda r: self.assert_(r=='foo'))
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# Get the pending deferreds with (block=False) and make sure ResultNotCompleted is raised
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for did in dDict.keys()[5:10]:
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d = self.pdm.get_pending_deferred(did,block=False)
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d.addErrback(lambda f: self.assertRaises(error.ResultNotCompleted, f.raiseException))
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# Now callback the last 5, get them and compare.
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for did in dDict.keys()[5:10]:
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dDict[did].callback('foo')
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d = self.pdm.get_pending_deferred(did,block=False)
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d.addCallback(lambda r: self.assert_(r=='foo'))
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def test_save_then_delete(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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self.assert_(self.pdm.quick_has_id(did))
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self.pdm.delete_pending_deferred(did)
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self.assert_(not self.pdm.quick_has_id(did))
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def test_save_get_delete(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d2.addErrback(lambda f: self.assertRaises(error.AbortedPendingDeferredError, f.raiseException))
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self.pdm.delete_pending_deferred(did)
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return d2
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def test_double_get(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d3 = self.pdm.get_pending_deferred(did,True)
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d3.addErrback(lambda f: self.assertRaises(error.InvalidDeferredID, f.raiseException))
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def test_get_after_callback(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d.callback('foo')
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d2 = self.pdm.get_pending_deferred(did,True)
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d2.addCallback(lambda r: self.assertEquals(r,'foo'))
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self.assert_(not self.pdm.quick_has_id(did))
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def test_get_before_callback(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d.callback('foo')
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d2.addCallback(lambda r: self.assertEquals(r,'foo'))
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self.assert_(not self.pdm.quick_has_id(did))
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d2.addCallback(lambda r: self.assertEquals(r,'foo'))
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d.callback('foo')
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self.assert_(not self.pdm.quick_has_id(did))
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def test_get_after_errback(self):
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class MyError(Exception):
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pass
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d.errback(failure.Failure(MyError('foo')))
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d2 = self.pdm.get_pending_deferred(did,True)
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d2.addErrback(lambda f: self.assertRaises(MyError, f.raiseException))
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self.assert_(not self.pdm.quick_has_id(did))
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def test_get_before_errback(self):
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class MyError(Exception):
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pass
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d.errback(failure.Failure(MyError('foo')))
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d2.addErrback(lambda f: self.assertRaises(MyError, f.raiseException))
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self.assert_(not self.pdm.quick_has_id(did))
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d2.addErrback(lambda f: self.assertRaises(MyError, f.raiseException))
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d.errback(failure.Failure(MyError('foo')))
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self.assert_(not self.pdm.quick_has_id(did))
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def test_noresult_noblock(self):
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d = defer.Deferred()
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,False)
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d2.addErrback(lambda f: self.assertRaises(error.ResultNotCompleted, f.raiseException))
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def test_with_callbacks(self):
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d = defer.Deferred()
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d.addCallback(lambda r: r+' foo')
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d.addCallback(lambda r: r+' bar')
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d.callback('bam')
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d2.addCallback(lambda r: self.assertEquals(r,'bam foo bar'))
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def test_with_errbacks(self):
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class MyError(Exception):
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pass
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d = defer.Deferred()
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d.addCallback(lambda r: 'foo')
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d.addErrback(lambda f: 'caught error')
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did = self.pdm.save_pending_deferred(d)
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d2 = self.pdm.get_pending_deferred(did,True)
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d.errback(failure.Failure(MyError('bam')))
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d2.addErrback(lambda f: self.assertRaises(MyError, f.raiseException))
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def test_nested_deferreds(self):
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d = defer.Deferred()
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d2 = defer.Deferred()
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d.addCallback(lambda r: d2)
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did = self.pdm.save_pending_deferred(d)
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d.callback('foo')
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d3 = self.pdm.get_pending_deferred(did,False)
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d3.addErrback(lambda f: self.assertRaises(error.ResultNotCompleted, f.raiseException))
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d2.callback('bar')
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d3 = self.pdm.get_pending_deferred(did,False)
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d3.addCallback(lambda r: self.assertEquals(r,'bar'))
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