~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006 by 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# "weren't nothing promised to you.  do i look like i got a promise face?"

"""Tests for trace library"""

import errno

import os

import sys

from StringIO import StringIO

from bzrlib.tests import TestCaseInTempDir, TestCase

from bzrlib.trace import mutter, report_exception

from bzrlib.errors import NotBranchError

def _format_exception():

    """Format an exception as it would normally be displayed to the user"""

    buf = StringIO()

    report_exception(sys.exc_info(), buf)

    return buf.getvalue()

class TestTrace(TestCase):

    def test_format_sys_exception(self):

        try:

            raise NotImplementedError, "time travel"

        except NotImplementedError:

            pass

        err = _format_exception()

        self.assertEqualDiff(err.splitlines()[0],

                'bzr: ERROR: exceptions.NotImplementedError: time travel')

        self.assertContainsRe(err,

                r'File.*test_trace.py')

    def test_format_interrupt_exception(self):

        try:

            raise KeyboardInterrupt()

        except KeyboardInterrupt:

            # XXX: Some risk that a *real* keyboard interrupt won't be seen

            pass

        msg = _format_exception()

        self.assertTrue(len(msg) > 0)

        self.assertEqualDiff(msg, 'bzr: interrupted\n')

    def test_format_os_error(self):

        try:

            file('nosuchfile22222')

        except (OSError, IOError):

            pass

        msg = _format_exception()

        self.assertContainsRe(msg, r'^bzr: ERROR: \[Errno .*\] No such file.*nosuchfile')

    def test_format_exception(self):

        """Short formatting of bzr exceptions"""

        try:

            raise NotBranchError, 'wibble'

        except NotBranchError:

            pass

        msg = _format_exception()

        self.assertTrue(len(msg) > 0)

        self.assertEqualDiff(msg, 'bzr: ERROR: Not a branch: wibble\n')

    def test_trace_unicode(self):

        """Write Unicode to trace log"""

        self.log(u'the unicode character for benzene is \N{BENZENE RING}')

        self.assertContainsRe('the unicode character',

                self._get_log())

    def test_report_broken_pipe(self):

        try:

            raise IOError(errno.EPIPE, 'broken pipe foofofo')

        except IOError, e:

            msg = _format_exception()

            self.assertEquals(msg, "bzr: broken pipe\n")

        else:

            self.fail("expected error not raised")

    def test_mutter_never_fails(self):

        # Even if the decode/encode stage fails, mutter should not

        # raise an exception

        mutter(u'Writing a greek mu (\xb5) works in a unicode string')

        mutter('But fails in an ascii string \xb5')

        # TODO: jam 20051227 mutter() doesn't flush the log file, and

        #       self._get_log() opens the file directly and reads it.

        #       So we need to manually flush the log file

        import bzrlib.trace

        bzrlib.trace._trace_file.flush()

        log = self._get_log()

        self.assertContainsRe(log, 'Writing a greek mu')

        self.assertContainsRe(log, 'UnicodeError')

        self.assertContainsRe(log, "'But fails in an ascii string")