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Viewing changes to bzrlib/tests/test_progress.py

  • Committer: Martin Pool
  • Date: 2006-06-20 07:55:43 UTC
  • mfrom: (1798 +trunk)
  • mto: This revision was merged to the branch mainline in revision 1799.
  • Revision ID: mbp@sourcefrog.net-20060620075543-b10f6575d4a4fa32
[merge] bzr.dev

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bzrlib/tests/test_progress.py
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# Copyright (C) 2006-2010 Canonical Ltd
 
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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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#
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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import os
 
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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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    ProgressTask,
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    )
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from bzrlib.symbol_versioning import (
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    deprecated_in,
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    )
 
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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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from bzrlib.ui.text import (
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    TextProgressView,
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    )
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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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    def isatty(self):
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        return True
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class _NonTTYStringIO(StringIO):
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    """Helper that implements isatty() but returns False"""
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    def isatty(self):
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        return False
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47
 
 
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class TestTextProgressView(TestCase):
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    """Tests for text display of progress bars.
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    These try to exercise the progressview independently of its construction,
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    which is arranged by the TextUIFactory.
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    """
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    # The ProgressTask now connects directly to the ProgressView, so we can
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    # check them independently of the factory or of the determination of what
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    # view to use.
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58
 
    def make_view(self):
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        out = StringIO()
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        view = TextProgressView(out)
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        view._width = 80
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        return out, view
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64
 
    def make_task(self, parent_task, view, msg, curr, total):
65
 
        # would normally be done by UIFactory; is done here so that we don't
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        # have to have one.
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        task = ProgressTask(parent_task, progress_view=view)
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        task.msg = msg
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        task.current_cnt = curr
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        task.total_cnt = total
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        return task
72
 
 
73
 
    def test_render_progress_no_bar(self):
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        """The default view now has a spinner but no bar."""
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        out, view = self.make_view()
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        # view.enable_bar = False
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        task = self.make_task(None, view, 'reticulating splines', 5, 20)
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        view.show_progress(task)
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        self.assertEqual(
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'\r/ reticulating splines 5/20                                                    \r'
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            , out.getvalue())
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    def test_render_progress_easy(self):
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        """Just one task and one quarter done"""
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        out, view = self.make_view()
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        view.enable_bar = True
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        task = self.make_task(None, view, 'reticulating splines', 5, 20)
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        view.show_progress(task)
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        self.assertEqual(
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'\r[####/               ] reticulating splines 5/20                               \r'
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            , out.getvalue())
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    def test_render_progress_nested(self):
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        """Tasks proportionally contribute to overall progress"""
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        out, view = self.make_view()
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        task = self.make_task(None, view, 'reticulating splines', 0, 2)
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        task2 = self.make_task(task, view, 'stage2', 1, 2)
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        view.show_progress(task2)
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        view.enable_bar = True
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        # so we're in the first half of the main task, and half way through
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        # that
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        self.assertEqual(
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r'[####-               ] reticulating splines:stage2 1/2'
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            , view._render_line())
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        # if the nested task is complete, then we're all the way through the
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        # first half of the overall work
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        task2.update('stage2', 2, 2)
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        self.assertEqual(
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r'[#########\          ] reticulating splines:stage2 2/2'
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            , view._render_line())
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    def test_render_progress_sub_nested(self):
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        """Intermediate tasks don't mess up calculation."""
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        out, view = self.make_view()
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        view.enable_bar = True
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        task_a = ProgressTask(None, progress_view=view)
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        task_a.update('a', 0, 2)
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        task_b = ProgressTask(task_a, progress_view=view)
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        task_b.update('b')
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        task_c = ProgressTask(task_b, progress_view=view)
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        task_c.update('c', 1, 2)
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        # the top-level task is in its first half; the middle one has no
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        # progress indication, just a label; and the bottom one is half done,
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        # so the overall fraction is 1/4
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        self.assertEqual(
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            r'[####|               ] a:b:c 1/2'
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            , view._render_line())
 
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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 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
 
65
        grandchild.update('barbells', 2, 2)
 
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        self.assertEqual(self.top.child_fraction, 1)
 
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68
    def test_implementations(self):
 
69
        for implementation in (TTYProgressBar, DotsProgressBar, 
 
70
                               DummyProgress):
 
71
            self.check_parent_handling(implementation)
 
72
 
 
73
    def check_parent_handling(self, parentclass):
 
74
        top = parentclass(to_file=StringIO())
 
75
        top.update('foobles', 1, 2)
 
76
        child = ChildProgress(_stack=FakeStack(top))
 
77
        child.update('baubles', 4, 4)
 
78
        top.update('lala', 2, 2)
 
79
        child.update('baubles', 4, 4)
 
80
 
 
81
    def test_stacking(self):
 
82
        self.check_stack(TTYProgressBar, ChildProgress)
 
83
        self.check_stack(DotsProgressBar, ChildProgress)
 
84
        self.check_stack(DummyProgress, DummyProgress)
 
85
 
 
86
    def check_stack(self, parent_class, child_class):
 
87
        stack = ProgressBarStack(klass=parent_class, to_file=StringIO())
 
88
        parent = stack.get_nested()
 
89
        try:
 
90
            self.assertIs(parent.__class__, parent_class)
 
91
            child = stack.get_nested()
 
92
            try:
 
93
                self.assertIs(child.__class__, child_class)
 
94
            finally:
 
95
                child.finished()
 
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        finally:
 
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            parent.finished()