~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006, 2007, 2008 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"""

from cStringIO import StringIO

import errno

import os

import re

import sys

import tempfile

from bzrlib import (

    errors,

    )

from bzrlib.tests import TestCaseInTempDir, TestCase

from bzrlib.trace import (

    mutter, mutter_callsite, report_exception,

    set_verbosity_level, get_verbosity_level, is_quiet, is_verbose, be_quiet,

    pop_log_file,

    push_log_file,

    _rollover_trace_maybe,

    )

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_unicode_error(self):

        try:

            raise errors.BzrCommandError(u'argument foo\xb5 does not exist')

        except errors.BzrCommandError:

            pass

        msg = _format_exception()

    def test_format_exception(self):

        """Short formatting of bzr exceptions"""

        try:

            raise errors.NotBranchError('wibble')

        except errors.NotBranchError:

            pass

        msg = _format_exception()

        self.assertTrue(len(msg) > 0)

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

    def test_report_external_import_error(self):

        """Short friendly message for missing system modules."""

        try:

            import ImaginaryModule

        except ImportError, e:

            pass

        else:

            self.fail("somehow succeeded in importing %r" % ImaginaryModule)

        msg = _format_exception()

        self.assertEqual(msg,

            'bzr: ERROR: No module named ImaginaryModule\n'

            'You may need to install this Python library separately.\n')

    def test_report_import_syntax_error(self):

        try:

            raise ImportError("syntax error")

        except ImportError, e:

            pass

        msg = _format_exception()

        self.assertContainsRe(msg,

            r"Traceback \(most recent call last\)")

    def test_trace_unicode(self):

        """Write Unicode to trace log"""

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

        self.assertContainsRe(self._get_log(keep_log_file=True),

                              "the unicode character for benzene is")

    def test_trace_argument_unicode(self):

        """Write a Unicode argument to the trace log"""

        mutter(u'the unicode character for benzene is %s', u'\N{BENZENE RING}')

        self.assertContainsRe(self._get_log(keep_log_file=True),

                              'the unicode character')

    def test_trace_argument_utf8(self):

        """Write a Unicode argument to the trace log"""

        mutter(u'the unicode character for benzene is %s',

               u'\N{BENZENE RING}'.encode('utf-8'))

        self.assertContainsRe(self._get_log(keep_log_file=True),

                              'the unicode character')

    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 assertLogStartsWith(self, log, string):

        """Like assertStartsWith, but skips the log timestamp."""

        self.assertContainsRe(log,

            '^\\d+\\.\\d+  ' + re.escape(string))

    def test_mutter_callsite_1(self):

        """mutter_callsite can capture 1 level of stack frame."""

        mutter_callsite(1, "foo %s", "a string")

        log = self._get_log(keep_log_file=True)

        # begin with the message

        self.assertLogStartsWith(log, 'foo a string\nCalled from:\n')

        # should show two frame: this frame and the one above

        self.assertContainsRe(log,

            'test_trace\\.py", line \\d+, in test_mutter_callsite_1\n')

        # this frame should be the final one

        self.assertEndsWith(log, ' "a string")\n')

    def test_mutter_callsite_2(self):

        """mutter_callsite can capture 2 levels of stack frame."""

        mutter_callsite(2, "foo %s", "a string")

        log = self._get_log(keep_log_file=True)

        # begin with the message

        self.assertLogStartsWith(log, 'foo a string\nCalled from:\n')

        # should show two frame: this frame and the one above

        self.assertContainsRe(log,

            'test_trace.py", line \d+, in test_mutter_callsite_2\n')

        # this frame should be the final one

        self.assertEndsWith(log, ' "a string")\n')

    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')

        mutter('and in an ascii argument: %s', '\xb5')

        log = self._get_log(keep_log_file=True)

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

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

        self.assertContainsRe(log, u"ascii argument: \xb5")

    def test_push_log_file(self):

        """Can push and pop log file, and this catches mutter messages.

        This is primarily for use in the test framework. 

        """

        tmp1 = tempfile.NamedTemporaryFile()

        tmp2 = tempfile.NamedTemporaryFile()

        try:

            memento1 = push_log_file(tmp1)

            mutter("comment to file1")

            try:

                memento2 = push_log_file(tmp2)

                try:

                    mutter("comment to file2")

                finally:

                    pop_log_file(memento2)

                mutter("again to file1")

            finally:

                pop_log_file(memento1)

            # the files were opened in binary mode, so should have exactly

            # these bytes.  and removing the file as the log target should

            # have caused them to be flushed out.  need to match using regexps

            # as there's a timestamp at the front.

            tmp1.seek(0)

            self.assertContainsRe(tmp1.read(),

                r"\d+\.\d+  comment to file1\n\d+\.\d+  again to file1\n")

            tmp2.seek(0)

            self.assertContainsRe(tmp2.read(),

                r"\d+\.\d+  comment to file2\n")

        finally:

            tmp1.close()

            tmp2.close()

class TestVerbosityLevel(TestCase):

    def test_verbosity_level(self):

        set_verbosity_level(1)

        self.assertEqual(1, get_verbosity_level())

        self.assertTrue(is_verbose())

        self.assertFalse(is_quiet())

        set_verbosity_level(-1)

        self.assertEqual(-1, get_verbosity_level())

        self.assertFalse(is_verbose())

        self.assertTrue(is_quiet())

        set_verbosity_level(0)

        self.assertEqual(0, get_verbosity_level())

        self.assertFalse(is_verbose())

        self.assertFalse(is_quiet())

    def test_be_quiet(self):

        # Confirm the old API still works

        be_quiet(True)

        self.assertEqual(-1, get_verbosity_level())

        be_quiet(False)

        self.assertEqual(0, get_verbosity_level())

class TestBzrLog(TestCaseInTempDir):

    def test_log_rollover(self):

        temp_log_name = 'test-log'

        trace_file = open(temp_log_name, 'at')

        trace_file.write('test_log_rollover padding\n' * 1000000)

        trace_file.close()

        _rollover_trace_maybe(temp_log_name)

        # should have been rolled over

        self.assertFalse(os.access(temp_log_name, os.R_OK))