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import time
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from tempfile import mktemp
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import nose.tools as nt
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from IPython.zmq.parallel import client as clientmod
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from IPython.zmq.parallel import error
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from IPython.zmq.parallel.asyncresult import AsyncResult, AsyncHubResult
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from IPython.zmq.parallel.view import LoadBalancedView, DirectView
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from clienttest import ClusterTestCase, segfault, wait
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class TestClient(ClusterTestCase):
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def test_ids(self):
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n = len(self.client.ids)
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self.add_engines(3)
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self.assertEquals(len(self.client.ids), n+3)
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self.assertTrue
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def test_segfault(self):
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"""test graceful handling of engine death"""
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self.add_engines(1)
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eid = self.client.ids[-1]
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ar = self.client.apply(segfault, block=False)
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self.assertRaisesRemote(error.EngineError, ar.get)
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eid = ar.engine_id
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while eid in self.client.ids:
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time.sleep(.01)
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self.client.spin()
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def test_view_indexing(self):
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"""test index access for views"""
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self.add_engines(2)
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targets = self.client._build_targets('all')[-1]
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v = self.client[:]
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self.assertEquals(v.targets, targets)
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t = self.client.ids[2]
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v = self.client[t]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, t)
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t = self.client.ids[2:4]
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v = self.client[t]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, t)
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v = self.client[::2]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, targets[::2])
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v = self.client[1::3]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, targets[1::3])
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v = self.client[:-3]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, targets[:-3])
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v = self.client[-1]
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self.assert_(isinstance(v, DirectView))
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self.assertEquals(v.targets, targets[-1])
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nt.assert_raises(TypeError, lambda : self.client[None])
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def test_view_cache(self):
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"""test that multiple view requests return the same object"""
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v = self.client[:2]
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v2 =self.client[:2]
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self.assertTrue(v is v2)
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v = self.client.view()
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v2 = self.client.view(balanced=True)
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self.assertTrue(v is v2)
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def test_targets(self):
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"""test various valid targets arguments"""
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build = self.client._build_targets
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ids = self.client.ids
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idents,targets = build(None)
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self.assertEquals(ids, targets)
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def test_clear(self):
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"""test clear behavior"""
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self.add_engines(2)
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self.client.block=True
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self.client.push(dict(a=5))
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self.client.pull('a')
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id0 = self.client.ids[-1]
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self.client.clear(targets=id0)
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self.client.pull('a', targets=self.client.ids[:-1])
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self.assertRaisesRemote(NameError, self.client.pull, 'a')
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self.client.clear()
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for i in self.client.ids:
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self.assertRaisesRemote(NameError, self.client.pull, 'a', targets=i)
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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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self.add_engines(2)
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push = self.client.push
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pull = self.client.pull
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self.client.block=True
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nengines = len(self.client)
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push({'data':data}, targets=0)
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d = pull('data', targets=0)
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self.assertEquals(d, data)
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push({'data':data})
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d = pull('data')
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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 = 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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push(dict(a=10,b=20))
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r = pull(('a','b'))
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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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self.add_engines(4)
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self.client.block=True
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push = self.client.push
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pull = self.client.pull
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execute = self.client.execute
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push({'testf':testf}, targets=0)
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r = pull('testf', targets=0)
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self.assertEqual(r(1.0), testf(1.0))
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execute('r = testf(10)', targets=0)
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r = pull('r', targets=0)
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self.assertEquals(r, testf(10))
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ar = push({'testf':testf}, block=False)
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ar.get()
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ar = 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", targets=0)
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r = pull(('testf','g'),targets=0)
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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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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_get_result(self):
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"""test getting results from the Hub."""
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c = clientmod.Client(profile='iptest')
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t = self.client.ids[-1]
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ar = c.apply(wait, (1,), block=False, targets=t)
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time.sleep(.25)
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ahr = self.client.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 = self.client.get_result(ar.msg_ids)
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self.assertFalse(isinstance(ar2, AsyncHubResult))
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def test_ids_list(self):
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"""test client.ids"""
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self.add_engines(2)
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ids = self.client.ids
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self.assertEquals(ids, self.client._ids)
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self.assertFalse(ids is self.client._ids)
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ids.remove(ids[-1])
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self.assertNotEquals(ids, self.client._ids)
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def test_arun_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_bound(lambda : g()), 5)
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