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# Copyright (C) 2006 by Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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from StringIO import StringIO
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from bzrlib import errors
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from bzrlib.progress import (
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DummyProgress, ChildProgress,
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from bzrlib.tests import TestCase
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def __init__(self, top):
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class InstrumentedProgress(TTYProgressBar):
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"""TTYProgress variant that tracks outcomes"""
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def __init__(self, *args, **kwargs):
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self.always_throttled = True
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TTYProgressBar.__init__(self, *args, **kwargs)
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def throttle(self, old_message):
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result = TTYProgressBar.throttle(self, old_message)
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self.always_throttled = False
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class _TTYStringIO(StringIO):
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"""A helper class which makes a StringIO look like a terminal"""
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class _NonTTYStringIO(StringIO):
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"""Helper that implements isatty() but returns False"""
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class TestProgress(TestCase):
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self.top = ChildProgress(_stack=FakeStack(q))
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def test_propogation(self):
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self.top.update('foobles', 1, 2)
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self.assertEqual(self.top.message, 'foobles')
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self.assertEqual(self.top.current, 1)
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self.assertEqual(self.top.total, 2)
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self.assertEqual(self.top.child_fraction, 0)
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child = ChildProgress(_stack=FakeStack(self.top))
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child.update('baubles', 2, 4)
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self.assertEqual(self.top.message, 'foobles')
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self.assertEqual(self.top.current, 1)
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self.assertEqual(self.top.total, 2)
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self.assertEqual(self.top.child_fraction, 0.5)
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grandchild = ChildProgress(_stack=FakeStack(child))
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grandchild.update('barbells', 1, 2)
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self.assertEqual(self.top.child_fraction, 0.625)
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self.assertEqual(child.child_fraction, 0.5)
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child.update('baubles', 3, 4)
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self.assertEqual(child.child_fraction, 0)
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self.assertEqual(self.top.child_fraction, 0.75)
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grandchild.update('barbells', 1, 2)
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self.assertEqual(self.top.child_fraction, 0.875)
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grandchild.update('barbells', 2, 2)
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self.assertEqual(self.top.child_fraction, 1)
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child.update('baubles', 4, 4)
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self.assertEqual(self.top.child_fraction, 1)
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grandchild.update('barbells', 2, 2)
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self.assertEqual(self.top.child_fraction, 1)
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def test_implementations(self):
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for implementation in (TTYProgressBar, DotsProgressBar,
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self.check_parent_handling(implementation)
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def check_parent_handling(self, parentclass):
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top = parentclass(to_file=StringIO())
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top.update('foobles', 1, 2)
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child = ChildProgress(_stack=FakeStack(top))
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child.update('baubles', 4, 4)
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top.update('lala', 2, 2)
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child.update('baubles', 4, 4)
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def test_stacking(self):
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self.check_stack(TTYProgressBar, ChildProgress)
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self.check_stack(DotsProgressBar, ChildProgress)
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self.check_stack(DummyProgress, DummyProgress)
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def check_stack(self, parent_class, child_class):
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stack = ProgressBarStack(klass=parent_class, to_file=StringIO())
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parent = stack.get_nested()
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self.assertIs(parent.__class__, parent_class)
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child = stack.get_nested()
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self.assertIs(child.__class__, child_class)
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def test_throttling(self):
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pb = InstrumentedProgress(to_file=StringIO())
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# instantaneous updates should be squelched
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pb.update('me', 1, 1)
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self.assertTrue(pb.always_throttled)
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pb = InstrumentedProgress(to_file=StringIO())
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# It's like an instant sleep(1)!
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# Updates after a second should not be squelched
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pb.update('me', 1, 1)
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self.assertFalse(pb.always_throttled)
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def test_clear(self):
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pb = TTYProgressBar(to_file=sio, show_eta=False)
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pb.width = 20 # Just make it easier to test
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# This should not output anything
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# These two should not be displayed because
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pb.update('foo', 1, 3)
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pb.update('bar', 2, 3)
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# So pb.clear() has nothing to do
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# Make sure the next update isn't throttled
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pb.update('baz', 3, 3)
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self.assertEqual('\r[=========] baz 3/3'
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def test_no_eta(self):
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# An old version of the progress bar would
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# store every update if show_eta was false
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# because the eta routine was where it was
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pb = InstrumentedProgress(to_file=StringIO(), show_eta=False)
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# Just make sure this first few are throttled
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# These messages are throttled, and don't contribute
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for count in xrange(100):
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pb.update('x', count, 300)
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self.assertEqual(0, len(pb.last_updates))
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# These happen too fast, so only one gets through
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for count in xrange(100):
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pb.update('x', count+100, 200)
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self.assertEqual(1, len(pb.last_updates))
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# But all of these go through, don't let the
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# last_update list grow without bound
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for count in xrange(100):
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pb.update('x', count+100, 200)
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self.assertEqual(pb._max_last_updates, len(pb.last_updates))
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class TestProgressTypes(TestCase):
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"""Test that the right ProgressBar gets instantiated at the right time."""
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def get_nested(self, outf, term, env_progress=None):
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"""Setup so that ProgressBar thinks we are in the supplied terminal."""
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orig_term = os.environ.get('TERM')
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orig_progress = os.environ.get('BZR_PROGRESS_BAR')
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os.environ['TERM'] = term
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if env_progress is not None:
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os.environ['BZR_PROGRESS_BAR'] = env_progress
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elif orig_progress is not None:
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del os.environ['BZR_PROGRESS_BAR']
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if orig_term is None:
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del os.environ['TERM']
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os.environ['TERM'] = orig_term
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# We may have never created BZR_PROGRESS_BAR
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# So we can't just delete like we can 'TERM' (which is always set)
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if orig_progress is None:
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if 'BZR_PROGRESS_BAR' in os.environ:
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del os.environ['BZR_PROGRESS_BAR']
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os.environ['BZR_PROGRESS_BAR'] = orig_progress
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self.addCleanup(reset)
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stack = ProgressBarStack(to_file=outf)
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pb = stack.get_nested()
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pb.start_time -= 1 # Make sure it is ready to write
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pb.width = 20 # And it is of reasonable size
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def test_tty_progress(self):
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# Make sure the ProgressBarStack thinks it is
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# writing out to a terminal, and thus uses a TTYProgressBar
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pb = self.get_nested(out, 'xterm')
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self.assertIsInstance(pb, TTYProgressBar)
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pb.update('foo', 1, 2)
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pb.update('bar', 2, 2)
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self.assertEqual('\r/ [==== ] foo 1/2'
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'\r- [=======] bar 2/2'
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def test_dots_progress(self):
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# Make sure the ProgressBarStack thinks it is
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# not writing out to a terminal, and thus uses a
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out = _NonTTYStringIO()
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pb = self.get_nested(out, 'xterm')
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self.assertIsInstance(pb, DotsProgressBar)
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pb.update('foo', 1, 2)
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pb.update('bar', 2, 2)
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self.assertEqual('foo: .'
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def test_no_isatty_progress(self):
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# Make sure ProgressBarStack handles a plain StringIO()
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out = cStringIO.StringIO()
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pb = self.get_nested(out, 'xterm')
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self.assertIsInstance(pb, DotsProgressBar)
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def test_dumb_progress(self):
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# Make sure the ProgressBarStack thinks it is writing out to a
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# terminal, but it is the emacs 'dumb' terminal, so it uses
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pb = self.get_nested(out, 'dumb')
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self.assertIsInstance(pb, DotsProgressBar)
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def test_progress_env_tty(self):
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# The environ variable BZR_PROGRESS_BAR controls what type of
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# progress bar we will get, even if it wouldn't usually be that type
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# Usually, this would be a DotsProgressBar
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out = cStringIO.StringIO()
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pb = self.get_nested(out, 'dumb', 'tty')
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# Even though we are not a tty, the env_var will override
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self.assertIsInstance(pb, TTYProgressBar)
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def test_progress_env_dots(self):
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# Even though we are in a tty, the env_var will override
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pb = self.get_nested(out, 'xterm', 'dots')
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self.assertIsInstance(pb, DotsProgressBar)
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def test_progress_env_none(self):
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# Even though we are in a valid tty, no progress
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pb = self.get_nested(out, 'xterm', 'none')
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self.assertIsInstance(pb, DummyProgress)
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def test_progress_env_invalid(self):
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self.assertRaises(errors.InvalidProgressBarType, self.get_nested,
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out, 'xterm', 'nonexistant')
added
removed
bzrlib/tests/test_progress.py
