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# -*- coding: utf-8 -*-
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"""test View objects
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Authors:
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* Min RK
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"""
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#-------------------------------------------------------------------------------
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# Copyright (C) 2011 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 sys
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import time
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from tempfile import mktemp
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from StringIO import StringIO
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import zmq
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from nose import SkipTest
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from IPython.testing import decorators as dec
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from IPython.testing.ipunittest import ParametricTestCase
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from IPython import parallel as pmod
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from IPython.parallel import error
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from IPython.parallel import AsyncResult, AsyncHubResult, AsyncMapResult
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from IPython.parallel import DirectView
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from IPython.parallel.util import interactive
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from IPython.parallel.tests import add_engines
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from .clienttest import ClusterTestCase, crash, wait, skip_without
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def setup():
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add_engines(3, total=True)
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class TestView(ClusterTestCase, ParametricTestCase):
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def test_z_crash_mux(self):
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"""test graceful handling of engine death (direct)"""
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raise SkipTest("crash tests disabled, due to undesirable crash reports")
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# self.add_engines(1)
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eid = self.client.ids[-1]
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ar = self.client[eid].apply_async(crash)
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self.assertRaisesRemote(error.EngineError, ar.get, 10)
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eid = ar.engine_id
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tic = time.time()
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while eid in self.client.ids and time.time()-tic < 5:
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time.sleep(.01)
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self.client.spin()
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self.assertFalse(eid in self.client.ids, "Engine should have died")
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def test_push_pull(self):
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"""test pushing and pulling"""
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data = dict(a=10, b=1.05, c=range(10), d={'e':(1,2),'f':'hi'})
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t = self.client.ids[-1]
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v = self.client[t]
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push = v.push
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pull = v.pull
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v.block=True
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nengines = len(self.client)
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push({'data':data})
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d = pull('data')
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self.assertEquals(d, data)
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self.client[:].push({'data':data})
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d = self.client[:].pull('data', block=True)
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self.assertEquals(d, nengines*[data])
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ar = push({'data':data}, block=False)
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self.assertTrue(isinstance(ar, AsyncResult))
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r = ar.get()
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ar = self.client[:].pull('data', block=False)
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self.assertTrue(isinstance(ar, AsyncResult))
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r = ar.get()
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self.assertEquals(r, nengines*[data])
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self.client[:].push(dict(a=10,b=20))
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r = self.client[:].pull(('a','b'), block=True)
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self.assertEquals(r, nengines*[[10,20]])
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def test_push_pull_function(self):
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"test pushing and pulling functions"
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def testf(x):
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return 2.0*x
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t = self.client.ids[-1]
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v = self.client[t]
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v.block=True
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push = v.push
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pull = v.pull
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execute = v.execute
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push({'testf':testf})
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r = pull('testf')
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self.assertEqual(r(1.0), testf(1.0))
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execute('r = testf(10)')
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r = pull('r')
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self.assertEquals(r, testf(10))
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ar = self.client[:].push({'testf':testf}, block=False)
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ar.get()
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ar = self.client[:].pull('testf', block=False)
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rlist = ar.get()
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for r in rlist:
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self.assertEqual(r(1.0), testf(1.0))
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execute("def g(x): return x*x")
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r = pull(('testf','g'))
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self.assertEquals((r[0](10),r[1](10)), (testf(10), 100))
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def test_push_function_globals(self):
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"""test that pushed functions have access to globals"""
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@interactive
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def geta():
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return a
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# self.add_engines(1)
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v = self.client[-1]
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v.block=True
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v['f'] = geta
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self.assertRaisesRemote(NameError, v.execute, 'b=f()')
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v.execute('a=5')
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v.execute('b=f()')
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self.assertEquals(v['b'], 5)
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def test_push_function_defaults(self):
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"""test that pushed functions preserve default args"""
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def echo(a=10):
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return a
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v = self.client[-1]
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v.block=True
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v['f'] = echo
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v.execute('b=f()')
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self.assertEquals(v['b'], 10)
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def test_get_result(self):
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"""test getting results from the Hub."""
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c = pmod.Client(profile='iptest')
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# self.add_engines(1)
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t = c.ids[-1]
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v = c[t]
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v2 = self.client[t]
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ar = v.apply_async(wait, 1)
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# give the monitor time to notice the message
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time.sleep(.25)
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ahr = v2.get_result(ar.msg_ids)
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self.assertTrue(isinstance(ahr, AsyncHubResult))
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self.assertEquals(ahr.get(), ar.get())
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ar2 = v2.get_result(ar.msg_ids)
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self.assertFalse(isinstance(ar2, AsyncHubResult))
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c.spin()
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c.close()
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def test_run_newline(self):
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"""test that run appends newline to files"""
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tmpfile = mktemp()
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with open(tmpfile, 'w') as f:
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f.write("""def g():
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return 5
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""")
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v = self.client[-1]
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v.run(tmpfile, block=True)
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self.assertEquals(v.apply_sync(lambda f: f(), pmod.Reference('g')), 5)
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def test_apply_tracked(self):
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"""test tracking for apply"""
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# self.add_engines(1)
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t = self.client.ids[-1]
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v = self.client[t]
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v.block=False
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def echo(n=1024*1024, **kwargs):
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with v.temp_flags(**kwargs):
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return v.apply(lambda x: x, 'x'*n)
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ar = echo(1, track=False)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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self.assertTrue(ar.sent)
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ar = echo(track=True)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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self.assertEquals(ar.sent, ar._tracker.done)
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ar._tracker.wait()
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self.assertTrue(ar.sent)
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def test_push_tracked(self):
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t = self.client.ids[-1]
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ns = dict(x='x'*1024*1024)
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v = self.client[t]
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ar = v.push(ns, block=False, track=False)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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self.assertTrue(ar.sent)
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ar = v.push(ns, block=False, track=True)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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ar._tracker.wait()
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self.assertEquals(ar.sent, ar._tracker.done)
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self.assertTrue(ar.sent)
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ar.get()
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def test_scatter_tracked(self):
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t = self.client.ids
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x='x'*1024*1024
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ar = self.client[t].scatter('x', x, block=False, track=False)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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self.assertTrue(ar.sent)
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ar = self.client[t].scatter('x', x, block=False, track=True)
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self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
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self.assertEquals(ar.sent, ar._tracker.done)
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ar._tracker.wait()
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self.assertTrue(ar.sent)
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ar.get()
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def test_remote_reference(self):
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v = self.client[-1]
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v['a'] = 123
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ra = pmod.Reference('a')
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b = v.apply_sync(lambda x: x, ra)
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self.assertEquals(b, 123)
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def test_scatter_gather(self):
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view = self.client[:]
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seq1 = range(16)
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view.scatter('a', seq1)
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seq2 = view.gather('a', block=True)
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self.assertEquals(seq2, seq1)
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self.assertRaisesRemote(NameError, view.gather, 'asdf', block=True)
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@skip_without('numpy')
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def test_scatter_gather_numpy(self):
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import numpy
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from numpy.testing.utils import assert_array_equal, assert_array_almost_equal
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view = self.client[:]
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a = numpy.arange(64)
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view.scatter('a', a)
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b = view.gather('a', block=True)
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assert_array_equal(b, a)
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def test_scatter_gather_lazy(self):
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"""scatter/gather with targets='all'"""
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view = self.client.direct_view(targets='all')
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x = range(64)
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view.scatter('x', x)
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gathered = view.gather('x', block=True)
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self.assertEquals(gathered, x)
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@dec.known_failure_py3
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@skip_without('numpy')
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def test_push_numpy_nocopy(self):
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import numpy
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view = self.client[:]
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a = numpy.arange(64)
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view['A'] = a
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@interactive
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def check_writeable(x):
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return x.flags.writeable
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for flag in view.apply_sync(check_writeable, pmod.Reference('A')):
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self.assertFalse(flag, "array is writeable, push shouldn't have pickled it")
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view.push(dict(B=a))
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for flag in view.apply_sync(check_writeable, pmod.Reference('B')):
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self.assertFalse(flag, "array is writeable, push shouldn't have pickled it")
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@skip_without('numpy')
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def test_apply_numpy(self):
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"""view.apply(f, ndarray)"""
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import numpy
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from numpy.testing.utils import assert_array_equal, assert_array_almost_equal
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A = numpy.random.random((100,100))
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view = self.client[-1]
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for dt in [ 'int32', 'uint8', 'float32', 'float64' ]:
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B = A.astype(dt)
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C = view.apply_sync(lambda x:x, B)
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assert_array_equal(B,C)
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def test_map(self):
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view = self.client[:]
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def f(x):
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return x**2
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data = range(16)
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r = view.map_sync(f, data)
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self.assertEquals(r, map(f, data))
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def test_map_iterable(self):
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"""test map on iterables (direct)"""
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view = self.client[:]
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# 101 is prime, so it won't be evenly distributed
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arr = range(101)
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# ensure it will be an iterator, even in Python 3
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it = iter(arr)
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r = view.map_sync(lambda x:x, arr)
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self.assertEquals(r, list(arr))
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def test_scatterGatherNonblocking(self):
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data = range(16)
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view = self.client[:]
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view.scatter('a', data, block=False)
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ar = view.gather('a', block=False)
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self.assertEquals(ar.get(), data)
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@skip_without('numpy')
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def test_scatter_gather_numpy_nonblocking(self):
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import numpy
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from numpy.testing.utils import assert_array_equal, assert_array_almost_equal
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a = numpy.arange(64)
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view = self.client[:]
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ar = view.scatter('a', a, block=False)
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self.assertTrue(isinstance(ar, AsyncResult))
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amr = view.gather('a', block=False)
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self.assertTrue(isinstance(amr, AsyncMapResult))
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assert_array_equal(amr.get(), a)
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def test_execute(self):
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view = self.client[:]
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# self.client.debug=True
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execute = view.execute
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ar = execute('c=30', block=False)
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self.assertTrue(isinstance(ar, AsyncResult))
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ar = execute('d=[0,1,2]', block=False)
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self.client.wait(ar, 1)
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self.assertEquals(len(ar.get()), len(self.client))
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for c in view['c']:
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self.assertEquals(c, 30)
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def test_abort(self):
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view = self.client[-1]
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ar = view.execute('import time; time.sleep(1)', block=False)
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ar2 = view.apply_async(lambda : 2)
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ar3 = view.apply_async(lambda : 3)
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view.abort(ar2)
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view.abort(ar3.msg_ids)
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self.assertRaises(error.TaskAborted, ar2.get)
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self.assertRaises(error.TaskAborted, ar3.get)
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def test_abort_all(self):
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"""view.abort() aborts all outstanding tasks"""
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view = self.client[-1]
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ars = [ view.apply_async(time.sleep, 0.25) for i in range(10) ]
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view.abort()
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view.wait(timeout=5)
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for ar in ars[5:]:
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self.assertRaises(error.TaskAborted, ar.get)
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def test_temp_flags(self):
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view = self.client[-1]
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view.block=True
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with view.temp_flags(block=False):
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self.assertFalse(view.block)
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self.assertTrue(view.block)
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@dec.known_failure_py3
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def test_importer(self):
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view = self.client[-1]
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view.clear(block=True)
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with view.importer:
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import re
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@interactive
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def findall(pat, s):
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# this globals() step isn't necessary in real code
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# only to prevent a closure in the test
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re = globals()['re']
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return re.findall(pat, s)
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self.assertEquals(view.apply_sync(findall, '\w+', 'hello world'), 'hello world'.split())
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def test_unicode_execute(self):
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"""test executing unicode strings"""
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v = self.client[-1]
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v.block=True
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if sys.version_info[0] >= 3:
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code="a='é'"
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else:
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code=u"a=u'é'"
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v.execute(code)
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self.assertEquals(v['a'], u'é')
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def test_unicode_apply_result(self):
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"""test unicode apply results"""
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v = self.client[-1]
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r = v.apply_sync(lambda : u'é')
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self.assertEquals(r, u'é')
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def test_unicode_apply_arg(self):
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"""test passing unicode arguments to apply"""
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v = self.client[-1]
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@interactive
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def check_unicode(a, check):
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assert isinstance(a, unicode), "%r is not unicode"%a
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assert isinstance(check, bytes), "%r is not bytes"%check
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assert a.encode('utf8') == check, "%s != %s"%(a,check)
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for s in [ u'é', u'ßø®∫',u'asdf' ]:
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try:
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v.apply_sync(check_unicode, s, s.encode('utf8'))
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except error.RemoteError as e:
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if e.ename == 'AssertionError':
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self.fail(e.evalue)
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else:
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raise e
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def test_map_reference(self):
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"""view.map(<Reference>, *seqs) should work"""
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v = self.client[:]
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v.scatter('n', self.client.ids, flatten=True)
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v.execute("f = lambda x,y: x*y")
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rf = pmod.Reference('f')
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nlist = list(range(10))
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mlist = nlist[::-1]
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expected = [ m*n for m,n in zip(mlist, nlist) ]
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result = v.map_sync(rf, mlist, nlist)
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self.assertEquals(result, expected)
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def test_apply_reference(self):
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"""view.apply(<Reference>, *args) should work"""
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v = self.client[:]
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v.scatter('n', self.client.ids, flatten=True)
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v.execute("f = lambda x: n*x")
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rf = pmod.Reference('f')
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result = v.apply_sync(rf, 5)
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expected = [ 5*id for id in self.client.ids ]
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self.assertEquals(result, expected)
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def test_eval_reference(self):
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v = self.client[self.client.ids[0]]
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v['g'] = range(5)
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rg = pmod.Reference('g[0]')
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echo = lambda x:x
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self.assertEquals(v.apply_sync(echo, rg), 0)
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def test_reference_nameerror(self):
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v = self.client[self.client.ids[0]]
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r = pmod.Reference('elvis_has_left')
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echo = lambda x:x
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self.assertRaisesRemote(NameError, v.apply_sync, echo, r)
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def test_single_engine_map(self):
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e0 = self.client[self.client.ids[0]]
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r = range(5)
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check = [ -1*i for i in r ]
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result = e0.map_sync(lambda x: -1*x, r)
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self.assertEquals(result, check)
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def test_len(self):
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"""len(view) makes sense"""
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e0 = self.client[self.client.ids[0]]
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yield self.assertEquals(len(e0), 1)
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v = self.client[:]
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yield self.assertEquals(len(v), len(self.client.ids))
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v = self.client.direct_view('all')
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yield self.assertEquals(len(v), len(self.client.ids))
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v = self.client[:2]
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yield self.assertEquals(len(v), 2)
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v = self.client[:1]
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yield self.assertEquals(len(v), 1)
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v = self.client.load_balanced_view()
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yield self.assertEquals(len(v), len(self.client.ids))
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# parametric tests seem to require manual closing?
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self.client.close()
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# begin execute tests
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def test_execute_reply(self):
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e0 = self.client[self.client.ids[0]]
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e0.block = True
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ar = e0.execute("5", silent=False)
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er = ar.get()
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self._wait_for(lambda : bool(er.pyout))
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self.assertEquals(str(er), "<ExecuteReply[%i]: 5>" % er.execution_count)
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self.assertEquals(er.pyout['data']['text/plain'], '5')
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def test_execute_reply_stdout(self):
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e0 = self.client[self.client.ids[0]]
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e0.block = True
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ar = e0.execute("print (5)", silent=False)
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er = ar.get()
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self._wait_for(lambda : bool(er.stdout))
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self.assertEquals(er.stdout.strip(), '5')
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def test_execute_pyout(self):
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"""execute triggers pyout with silent=False"""
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view = self.client[:]
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ar = view.execute("5", silent=False, block=True)
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self._wait_for(lambda : all(ar.pyout))
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expected = [{'text/plain' : '5'}] * len(view)
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mimes = [ out['data'] for out in ar.pyout ]
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self.assertEquals(mimes, expected)
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def test_execute_silent(self):
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"""execute does not trigger pyout with silent=True"""
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view = self.client[:]
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ar = view.execute("5", block=True)
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expected = [None] * len(view)
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self.assertEquals(ar.pyout, expected)
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def test_execute_magic(self):
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"""execute accepts IPython commands"""
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view = self.client[:]
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view.execute("a = 5")
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ar = view.execute("%whos", block=True)
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# this will raise, if that failed
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ar.get(5)
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self._wait_for(lambda : all(ar.stdout))
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for stdout in ar.stdout:
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lines = stdout.splitlines()
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self.assertEquals(lines[0].split(), ['Variable', 'Type', 'Data/Info'])
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found = False
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for line in lines[2:]:
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split = line.split()
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if split == ['a', 'int', '5']:
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found = True
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break
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self.assertTrue(found, "whos output wrong: %s" % stdout)
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def test_execute_displaypub(self):
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"""execute tracks display_pub output"""
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view = self.client[:]
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view.execute("from IPython.core.display import *")
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ar = view.execute("[ display(i) for i in range(5) ]", block=True)
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self._wait_for(lambda : all(len(er.outputs) >= 5 for er in ar))
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expected = [ {u'text/plain' : unicode(j)} for j in range(5) ]
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for outputs in ar.outputs:
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mimes = [ out['data'] for out in outputs ]
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self.assertEquals(mimes, expected)
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def test_apply_displaypub(self):
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"""apply tracks display_pub output"""
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view = self.client[:]
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view.execute("from IPython.core.display import *")
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@interactive
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def publish():
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[ display(i) for i in range(5) ]
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ar = view.apply_async(publish)
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ar.get(5)
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self._wait_for(lambda : all(len(out) >= 5 for out in ar.outputs))
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expected = [ {u'text/plain' : unicode(j)} for j in range(5) ]
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for outputs in ar.outputs:
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mimes = [ out['data'] for out in outputs ]
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self.assertEquals(mimes, expected)
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def test_execute_raises(self):
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"""exceptions in execute requests raise appropriately"""
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view = self.client[-1]
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ar = view.execute("1/0")
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self.assertRaisesRemote(ZeroDivisionError, ar.get, 2)
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@dec.skipif_not_matplotlib
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def test_magic_pylab(self):
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"""%pylab works on engines"""
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view = self.client[-1]
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ar = view.execute("%pylab inline")
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|
# at least check if this raised:
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reply = ar.get(5)
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# include imports, in case user config
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ar = view.execute("plot(rand(100))", silent=False)
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reply = ar.get(5)
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self._wait_for(lambda : all(ar.outputs))
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self.assertEquals(len(reply.outputs), 1)
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output = reply.outputs[0]
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self.assertTrue("data" in output)
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data = output['data']
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self.assertTrue("image/png" in data)
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