~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006, 2007, 2009 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

import os

from StringIO import StringIO

from bzrlib import errors

from bzrlib.progress import (

    ProgressTask,

    )

from bzrlib.symbol_versioning import (

    deprecated_in,

    )

from bzrlib.tests import TestCase

from bzrlib.ui.text import (

    TextProgressView,

    )

class _TTYStringIO(StringIO):

    """A helper class which makes a StringIO look like a terminal"""

    def isatty(self):

        return True

class _NonTTYStringIO(StringIO):

    """Helper that implements isatty() but returns False"""

    def isatty(self):

        return False

class TestTextProgressView(TestCase):

    """Tests for text display of progress bars.

    These try to exercise the progressview independently of its construction,

    which is arranged by the TextUIFactory.

    """

    # The ProgressTask now connects directly to the ProgressView, so we can

    # check them independently of the factory or of the determination of what

    # view to use.

    def make_view(self):

        out = StringIO()

        view = TextProgressView(out)

        view._width = 80

        return out, view

    def make_task(self, parent_task, view, msg, curr, total):

        # would normally be done by UIFactory; is done here so that we don't

        # have to have one.

        task = ProgressTask(parent_task, progress_view=view)

        task.msg = msg

        task.current_cnt = curr

        task.total_cnt = total

        return task

    def test_render_progress_easy(self):

        """Just one task and one quarter done"""

        out, view = self.make_view()

        task = self.make_task(None, view, 'reticulating splines', 5, 20)

        view.show_progress(task)

        self.assertEqual(

'\r[####/               ] reticulating splines 5/20                               \r'

            , out.getvalue())

    def test_render_progress_nested(self):

        """Tasks proportionally contribute to overall progress"""

        out, view = self.make_view()

        task = self.make_task(None, view, 'reticulating splines', 0, 2)

        task2 = self.make_task(task, view, 'stage2', 1, 2)

        view.show_progress(task2)

        # so we're in the first half of the main task, and half way through

        # that

        self.assertEqual(

r'[####-               ] reticulating splines:stage2 1/2'

            , view._render_line())

        # if the nested task is complete, then we're all the way through the

        # first half of the overall work

        task2.update('stage2', 2, 2)

        self.assertEqual(

r'[#########\          ] reticulating splines:stage2 2/2'

            , view._render_line())

    def test_render_progress_sub_nested(self):

        """Intermediate tasks don't mess up calculation."""

        out, view = self.make_view()

        task_a = ProgressTask(None, progress_view=view)

        task_a.update('a', 0, 2)

        task_b = ProgressTask(task_a, progress_view=view)

        task_b.update('b')

        task_c = ProgressTask(task_b, progress_view=view)

        task_c.update('c', 1, 2)

        # the top-level task is in its first half; the middle one has no

        # progress indication, just a label; and the bottom one is half done,

        # so the overall fraction is 1/4

        self.assertEqual(

            r'[####|               ] a:b:c 1/2'

            , view._render_line())