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"""Tests for pylab tools module.
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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 Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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# Stdlib imports
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import time
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# Third-party imports
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import nose.tools as nt
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# Our own imports
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from IPython.lib import backgroundjobs as bg
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#-----------------------------------------------------------------------------
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# Globals and constants
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#-----------------------------------------------------------------------------
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t_short = 0.0001 # very short interval to wait on jobs
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#-----------------------------------------------------------------------------
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# Local utilities
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#-----------------------------------------------------------------------------
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def sleeper(interval=t_short, *a, **kw):
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args = dict(interval=interval,
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other_args=a,
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kw_args=kw)
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time.sleep(interval)
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return args
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def crasher(interval=t_short, *a, **kw):
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time.sleep(interval)
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raise Exception("Dead job with interval %s" % interval)
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#-----------------------------------------------------------------------------
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# Classes and functions
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#-----------------------------------------------------------------------------
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def test_result():
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"""Test job submission and result retrieval"""
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jobs = bg.BackgroundJobManager()
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j = jobs.new(sleeper)
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j.join()
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nt.assert_equal(j.result['interval'], t_short)
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def test_flush():
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"""Test job control"""
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jobs = bg.BackgroundJobManager()
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j = jobs.new(sleeper)
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j.join()
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nt.assert_equal(len(jobs.completed), 1)
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nt.assert_equal(len(jobs.dead), 0)
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jobs.flush()
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nt.assert_equal(len(jobs.completed), 0)
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def test_dead():
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"""Test control of dead jobs"""
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jobs = bg.BackgroundJobManager()
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j = jobs.new(crasher)
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j.join()
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nt.assert_equal(len(jobs.completed), 0)
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nt.assert_equal(len(jobs.dead), 1)
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jobs.flush()
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nt.assert_equal(len(jobs.dead), 0)
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def test_longer():
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"""Test control of longer-running jobs"""
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jobs = bg.BackgroundJobManager()
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# Sleep for long enough for the following two checks to still report the
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# job as running, but not so long that it makes the test suite noticeably
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# slower.
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j = jobs.new(sleeper, 0.1)
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nt.assert_equal(len(jobs.running), 1)
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nt.assert_equal(len(jobs.completed), 0)
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j.join()
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nt.assert_equal(len(jobs.running), 0)
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nt.assert_equal(len(jobs.completed), 1)
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