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#!/usr/bin/env python
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# encoding: utf-8
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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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import time
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from IPython.kernel import task, engineservice as es
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from IPython.kernel.util import printer
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from IPython.kernel import error
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#-------------------------------------------------------------------------------
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# Tests
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#-------------------------------------------------------------------------------
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def _raise_it(f):
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try:
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f.raiseException()
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except CompositeError, e:
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e.raise_exception()
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class TaskTestBase(object):
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def addEngine(self, n=1):
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for i in range(n):
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e = es.EngineService()
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e.startService()
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regDict = self.controller.register_engine(es.QueuedEngine(e), None)
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e.id = regDict['id']
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self.engines.append(e)
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class ITaskControllerTestCase(TaskTestBase):
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def test_task_ids(self):
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self.addEngine(1)
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d = self.tc.run(task.StringTask('a=5'))
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d.addCallback(lambda r: self.assertEquals(r, 0))
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d.addCallback(lambda r: self.tc.run(task.StringTask('a=5')))
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d.addCallback(lambda r: self.assertEquals(r, 1))
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d.addCallback(lambda r: self.tc.run(task.StringTask('a=5')))
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d.addCallback(lambda r: self.assertEquals(r, 2))
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d.addCallback(lambda r: self.tc.run(task.StringTask('a=5')))
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d.addCallback(lambda r: self.assertEquals(r, 3))
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return d
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def test_abort(self):
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"""Cannot do a proper abort test, because blocking execution prevents
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abort from being called before task completes"""
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self.addEngine(1)
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t = task.StringTask('a=5')
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d = self.tc.abort(0)
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d.addErrback(lambda f: self.assertRaises(IndexError, f.raiseException))
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d.addCallback(lambda _:self.tc.run(t))
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d.addCallback(self.tc.abort)
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d.addErrback(lambda f: self.assertRaises(IndexError, f.raiseException))
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return d
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def test_abort_type(self):
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self.addEngine(1)
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d = self.tc.abort('asdfadsf')
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d.addErrback(lambda f: self.assertRaises(TypeError, f.raiseException))
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return d
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def test_clear_before_and_after(self):
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self.addEngine(1)
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t = task.StringTask('a=1', clear_before=True, pull='b', clear_after=True)
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d = self.multiengine.execute('b=1', targets=0)
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d.addCallback(lambda _: self.tc.run(t))
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d.addCallback(lambda tid: self.tc.get_task_result(tid,block=True))
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d.addCallback(lambda tr: tr.failure)
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d.addErrback(lambda f: self.assertRaises(NameError, f.raiseException))
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d.addCallback(lambda _:self.multiengine.pull('a', targets=0))
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d.addErrback(lambda f: self.assertRaises(NameError, _raise_it, f))
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return d
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def test_simple_retries(self):
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self.addEngine(1)
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t = task.StringTask("i += 1\nassert i == 16", pull='i',retries=10)
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t2 = task.StringTask("i += 1\nassert i == 16", pull='i',retries=10)
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d = self.multiengine.execute('i=0', targets=0)
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d.addCallback(lambda r: self.tc.run(t))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: tr.ns.i)
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d.addErrback(lambda f: self.assertRaises(AssertionError, f.raiseException))
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d.addCallback(lambda r: self.tc.run(t2))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: tr.ns.i)
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d.addCallback(lambda r: self.assertEquals(r, 16))
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return d
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def test_recovery_tasks(self):
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self.addEngine(1)
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t = task.StringTask("i=16", pull='i')
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t2 = task.StringTask("raise Exception", recovery_task=t, retries = 2)
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d = self.tc.run(t2)
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: tr.ns.i)
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d.addCallback(lambda r: self.assertEquals(r, 16))
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return d
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def test_setup_ns(self):
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self.addEngine(1)
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d = self.multiengine.execute('a=0', targets=0)
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ns = dict(a=1, b=0)
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t = task.StringTask("", push=ns, pull=['a','b'])
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d.addCallback(lambda r: self.tc.run(t))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: {'a':tr.ns.a, 'b':tr['b']})
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d.addCallback(lambda r: self.assertEquals(r, ns))
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return d
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def test_string_task_results(self):
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self.addEngine(1)
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t1 = task.StringTask('a=5', pull='a')
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d = self.tc.run(t1)
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: (tr.ns.a,tr['a'],tr.failure, tr.raise_exception()))
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d.addCallback(lambda r: self.assertEquals(r, (5,5,None,None)))
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t2 = task.StringTask('7=5')
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d.addCallback(lambda r: self.tc.run(t2))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: tr.ns)
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d.addErrback(lambda f: self.assertRaises(SyntaxError, f.raiseException))
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t3 = task.StringTask('', pull='b')
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d.addCallback(lambda r: self.tc.run(t3))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda tr: tr.ns)
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d.addErrback(lambda f: self.assertRaises(NameError, f.raiseException))
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return d
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def test_map_task(self):
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self.addEngine(1)
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t1 = task.MapTask(lambda x: 2*x,(10,))
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d = self.tc.run(t1)
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda r: self.assertEquals(r,20))
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t2 = task.MapTask(lambda : 20)
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d.addCallback(lambda _: self.tc.run(t2))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda r: self.assertEquals(r,20))
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t3 = task.MapTask(lambda x: x,(),{'x':20})
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d.addCallback(lambda _: self.tc.run(t3))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(lambda r: self.assertEquals(r,20))
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return d
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def test_map_task_failure(self):
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self.addEngine(1)
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t1 = task.MapTask(lambda x: 1/0,(10,))
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d = self.tc.run(t1)
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d.addCallback(self.tc.get_task_result, block=True)
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d.addErrback(lambda f: self.assertRaises(ZeroDivisionError, f.raiseException))
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return d
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def test_map_task_args(self):
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self.assertRaises(TypeError, task.MapTask, 'asdfasdf')
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self.assertRaises(TypeError, task.MapTask, lambda x: x, 10)
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self.assertRaises(TypeError, task.MapTask, lambda x: x, (10,),30)
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def test_clear(self):
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self.addEngine(1)
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t1 = task.MapTask(lambda x: 2*x,(10,))
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d = self.tc.run(t1)
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d.addCallback(lambda _: self.tc.get_task_result(0, block=True))
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d.addCallback(lambda r: self.assertEquals(r,20))
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d.addCallback(lambda _: self.tc.clear())
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d.addCallback(lambda _: self.tc.get_task_result(0, block=True))
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d.addErrback(lambda f: self.assertRaises(IndexError, f.raiseException))
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return d
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def get_traceback_frames(self, result):
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"""Execute a failing string as a task and return stack frame strings.
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This lets us check that the returned exceptions contain as many stack
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frames as the user expects from his code.
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Parameters
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----------
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d : deferred
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src : string
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Code to be executed, should fail."""
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# This gets Twisted's short-format traceback and picks the info for
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# frames that actually belong to user code.
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return result.failure.getBriefTraceback().split('\n<string>:')[1:]
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def check_traceback(self, cmd, nframes, exception=IOError):
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"""Ensure that we have a traceback object in task failures."""
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self.addEngine(1)
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t1 = task.StringTask(cmd)
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d = self.tc.run(t1)
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d.addCallback(self.tc.get_task_result, block=True)
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# Sanity check, that the right exception is raised
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d.addCallback(lambda r: self.assertRaises(exception, r.raise_exception))
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# Rerun the same task, this time we check for the traceback to have the
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# right number of frames
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d.addCallback(lambda r: self.tc.run(t1))
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d.addCallback(self.tc.get_task_result, block=True)
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d.addCallback(self.get_traceback_frames)
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d.addCallback(lambda frames: self.assertEquals(len(frames), nframes))
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return d
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# Check traceback structure with 2 and 4 frame-deep stacks
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def test_traceback(self):
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cmd = """
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def fail():
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raise IOError('failure test')
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result = fail()
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"""
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return self.check_traceback(cmd, 2)
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def test_traceback2(self):
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cmd = """
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def boom():
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raise IOError('failure test')
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def crash():
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boom()
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def fail():
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crash()
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result = fail()
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"""
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return self.check_traceback(cmd, 4)
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