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Merge pull request #1391 from minrk/no_engines...
Merge pull request #1391 from minrk/no_engines Improve Hub/Scheduler when no engines are registered 1. Tasks are pulled into the schedule, rather than left on the ZMQ queue, which means they enter the database. 2. queue_status will not raise NoEngines when there aren't any, instead it will still fetch the available information. Bug fixed in db_query, where behavior did not match docstring (buffers should be excluded if no keys are specified). closes #826 (again)

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test_client.py
324 lines | 11.4 KiB | text/x-python | PythonLexer
"""Tests for parallel client.py
Authors:
* Min RK
"""
#-------------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
from __future__ import division
import time
from datetime import datetime
from tempfile import mktemp
import zmq
from IPython.parallel.client import client as clientmod
from IPython.parallel import error
from IPython.parallel import AsyncResult, AsyncHubResult
from IPython.parallel import LoadBalancedView, DirectView
from clienttest import ClusterTestCase, segfault, wait, add_engines
def setup():
add_engines(4)
class TestClient(ClusterTestCase):
def test_ids(self):
n = len(self.client.ids)
self.add_engines(3)
self.assertEquals(len(self.client.ids), n+3)
def test_view_indexing(self):
"""test index access for views"""
self.add_engines(2)
targets = self.client._build_targets('all')[-1]
v = self.client[:]
self.assertEquals(v.targets, targets)
t = self.client.ids[2]
v = self.client[t]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, t)
t = self.client.ids[2:4]
v = self.client[t]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, t)
v = self.client[::2]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, targets[::2])
v = self.client[1::3]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, targets[1::3])
v = self.client[:-3]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, targets[:-3])
v = self.client[-1]
self.assert_(isinstance(v, DirectView))
self.assertEquals(v.targets, targets[-1])
self.assertRaises(TypeError, lambda : self.client[None])
def test_lbview_targets(self):
"""test load_balanced_view targets"""
v = self.client.load_balanced_view()
self.assertEquals(v.targets, None)
v = self.client.load_balanced_view(-1)
self.assertEquals(v.targets, [self.client.ids[-1]])
v = self.client.load_balanced_view('all')
self.assertEquals(v.targets, None)
def test_dview_targets(self):
"""test direct_view targets"""
v = self.client.direct_view()
self.assertEquals(v.targets, 'all')
v = self.client.direct_view('all')
self.assertEquals(v.targets, 'all')
v = self.client.direct_view(-1)
self.assertEquals(v.targets, self.client.ids[-1])
def test_lazy_all_targets(self):
"""test lazy evaluation of rc.direct_view('all')"""
v = self.client.direct_view()
self.assertEquals(v.targets, 'all')
def double(x):
return x*2
seq = range(100)
ref = [ double(x) for x in seq ]
# add some engines, which should be used
self.add_engines(2)
n1 = len(self.client.ids)
# simple apply
r = v.apply_sync(lambda : 1)
self.assertEquals(r, [1] * n1)
# map goes through remotefunction
r = v.map_sync(double, seq)
self.assertEquals(r, ref)
# add a couple more engines, and try again
self.add_engines(2)
n2 = len(self.client.ids)
self.assertNotEquals(n2, n1)
# apply
r = v.apply_sync(lambda : 1)
self.assertEquals(r, [1] * n2)
# map
r = v.map_sync(double, seq)
self.assertEquals(r, ref)
def test_targets(self):
"""test various valid targets arguments"""
build = self.client._build_targets
ids = self.client.ids
idents,targets = build(None)
self.assertEquals(ids, targets)
def test_clear(self):
"""test clear behavior"""
# self.add_engines(2)
v = self.client[:]
v.block=True
v.push(dict(a=5))
v.pull('a')
id0 = self.client.ids[-1]
self.client.clear(targets=id0, block=True)
a = self.client[:-1].get('a')
self.assertRaisesRemote(NameError, self.client[id0].get, 'a')
self.client.clear(block=True)
for i in self.client.ids:
# print i
self.assertRaisesRemote(NameError, self.client[i].get, 'a')
def test_get_result(self):
"""test getting results from the Hub."""
c = clientmod.Client(profile='iptest')
# self.add_engines(1)
t = c.ids[-1]
ar = c[t].apply_async(wait, 1)
# give the monitor time to notice the message
time.sleep(.25)
ahr = self.client.get_result(ar.msg_ids)
self.assertTrue(isinstance(ahr, AsyncHubResult))
self.assertEquals(ahr.get(), ar.get())
ar2 = self.client.get_result(ar.msg_ids)
self.assertFalse(isinstance(ar2, AsyncHubResult))
c.close()
def test_ids_list(self):
"""test client.ids"""
# self.add_engines(2)
ids = self.client.ids
self.assertEquals(ids, self.client._ids)
self.assertFalse(ids is self.client._ids)
ids.remove(ids[-1])
self.assertNotEquals(ids, self.client._ids)
def test_queue_status(self):
# self.addEngine(4)
ids = self.client.ids
id0 = ids[0]
qs = self.client.queue_status(targets=id0)
self.assertTrue(isinstance(qs, dict))
self.assertEquals(sorted(qs.keys()), ['completed', 'queue', 'tasks'])
allqs = self.client.queue_status()
self.assertTrue(isinstance(allqs, dict))
intkeys = list(allqs.keys())
intkeys.remove('unassigned')
self.assertEquals(sorted(intkeys), sorted(self.client.ids))
unassigned = allqs.pop('unassigned')
for eid,qs in allqs.items():
self.assertTrue(isinstance(qs, dict))
self.assertEquals(sorted(qs.keys()), ['completed', 'queue', 'tasks'])
def test_shutdown(self):
# self.addEngine(4)
ids = self.client.ids
id0 = ids[0]
self.client.shutdown(id0, block=True)
while id0 in self.client.ids:
time.sleep(0.1)
self.client.spin()
self.assertRaises(IndexError, lambda : self.client[id0])
def test_result_status(self):
pass
# to be written
def test_db_query_dt(self):
"""test db query by date"""
hist = self.client.hub_history()
middle = self.client.db_query({'msg_id' : hist[len(hist)//2]})[0]
tic = middle['submitted']
before = self.client.db_query({'submitted' : {'$lt' : tic}})
after = self.client.db_query({'submitted' : {'$gte' : tic}})
self.assertEquals(len(before)+len(after),len(hist))
for b in before:
self.assertTrue(b['submitted'] < tic)
for a in after:
self.assertTrue(a['submitted'] >= tic)
same = self.client.db_query({'submitted' : tic})
for s in same:
self.assertTrue(s['submitted'] == tic)
def test_db_query_keys(self):
"""test extracting subset of record keys"""
found = self.client.db_query({'msg_id': {'$ne' : ''}},keys=['submitted', 'completed'])
for rec in found:
self.assertEquals(set(rec.keys()), set(['msg_id', 'submitted', 'completed']))
def test_db_query_default_keys(self):
"""default db_query excludes buffers"""
found = self.client.db_query({'msg_id': {'$ne' : ''}})
for rec in found:
keys = set(rec.keys())
self.assertFalse('buffers' in keys, "'buffers' should not be in: %s" % keys)
self.assertFalse('result_buffers' in keys, "'result_buffers' should not be in: %s" % keys)
def test_db_query_msg_id(self):
"""ensure msg_id is always in db queries"""
found = self.client.db_query({'msg_id': {'$ne' : ''}},keys=['submitted', 'completed'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
found = self.client.db_query({'msg_id': {'$ne' : ''}},keys=['submitted'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
found = self.client.db_query({'msg_id': {'$ne' : ''}},keys=['msg_id'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
def test_db_query_in(self):
"""test db query with '$in','$nin' operators"""
hist = self.client.hub_history()
even = hist[::2]
odd = hist[1::2]
recs = self.client.db_query({ 'msg_id' : {'$in' : even}})
found = [ r['msg_id'] for r in recs ]
self.assertEquals(set(even), set(found))
recs = self.client.db_query({ 'msg_id' : {'$nin' : even}})
found = [ r['msg_id'] for r in recs ]
self.assertEquals(set(odd), set(found))
def test_hub_history(self):
hist = self.client.hub_history()
recs = self.client.db_query({ 'msg_id' : {"$ne":''}})
recdict = {}
for rec in recs:
recdict[rec['msg_id']] = rec
latest = datetime(1984,1,1)
for msg_id in hist:
rec = recdict[msg_id]
newt = rec['submitted']
self.assertTrue(newt >= latest)
latest = newt
ar = self.client[-1].apply_async(lambda : 1)
ar.get()
time.sleep(0.25)
self.assertEquals(self.client.hub_history()[-1:],ar.msg_ids)
def test_resubmit(self):
def f():
import random
return random.random()
v = self.client.load_balanced_view()
ar = v.apply_async(f)
r1 = ar.get(1)
# give the Hub a chance to notice:
time.sleep(0.5)
ahr = self.client.resubmit(ar.msg_ids)
r2 = ahr.get(1)
self.assertFalse(r1 == r2)
def test_resubmit_inflight(self):
"""ensure ValueError on resubmit of inflight task"""
v = self.client.load_balanced_view()
ar = v.apply_async(time.sleep,1)
# give the message a chance to arrive
time.sleep(0.2)
self.assertRaisesRemote(ValueError, self.client.resubmit, ar.msg_ids)
ar.get(2)
def test_resubmit_badkey(self):
"""ensure KeyError on resubmit of nonexistant task"""
self.assertRaisesRemote(KeyError, self.client.resubmit, ['invalid'])
def test_purge_results(self):
# ensure there are some tasks
for i in range(5):
self.client[:].apply_sync(lambda : 1)
# Wait for the Hub to realise the result is done:
# This prevents a race condition, where we
# might purge a result the Hub still thinks is pending.
time.sleep(0.1)
rc2 = clientmod.Client(profile='iptest')
hist = self.client.hub_history()
ahr = rc2.get_result([hist[-1]])
ahr.wait(10)
self.client.purge_results(hist[-1])
newhist = self.client.hub_history()
self.assertEquals(len(newhist)+1,len(hist))
rc2.spin()
rc2.close()
def test_purge_all_results(self):
self.client.purge_results('all')
hist = self.client.hub_history()
self.assertEquals(len(hist), 0)