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Viewing changes to bzrlib/tests/test_progress.py

  • Committer: John Arbash Meinel
  • Date: 2006-07-02 05:45:50 UTC
  • mto: This revision was merged to the branch mainline in revision 1851.
  • Revision ID: john@arbash-meinel.com-20060702054550-e535f24da694acb7
make_entry refuses to create non-normalized entries.

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bzrlib/tests/test_progress.py
 
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# Copyright (C) 2006 by Canonical Ltd
 
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#
 
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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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#
 
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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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#
 
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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.progress import (
 
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        DummyProgress, ChildProgress,
 
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        TTYProgressBar,
 
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        DotsProgressBar,
 
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        ProgressBarStack,
 
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        )
 
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from bzrlib.tests import TestCase
 
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class FakeStack:
 
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    def __init__(self, top):
 
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        self.__top = top
 
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    def top(self):
 
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        return 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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        if result is False:
 
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            self.always_throttled = False
 
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class TestProgress(TestCase):
 
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    def setUp(self):
 
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        q = DummyProgress()
 
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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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        #test clamping
 
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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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                               DummyProgress):
 
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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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        try:
 
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            self.assertIs(parent.__class__, parent_class)
 
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            child = stack.get_nested()
 
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            try:
 
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                self.assertIs(child.__class__, child_class)
 
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            finally:
 
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                child.finished()
 
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        finally:
 
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            parent.finished()
 
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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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        pb.start_time -= 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)