~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005-2010 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

# "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 (

    debug,

    errors,

    trace,

    )

from bzrlib.tests import features, 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,

    show_error,

    )

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):

        # Test handling of an internal/unexpected error that probably

        # indicates a bug in bzr.  The details of the message may vary

        # depending on whether apport is available or not.  See test_crash for

        # more.

        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,

            'Bazaar has encountered an internal error.')

    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_memory_error(self):

        try:

            raise MemoryError()

        except MemoryError:

            pass

        msg = _format_exception()

        self.assertEquals(msg,

            "bzr: out of memory\nUse -Dmem_dump to dump memory to a file.\n")

    def test_format_mem_dump(self):

        self.requireFeature(features.meliae)

        debug.debug_flags.add('mem_dump')

        try:

            raise MemoryError()

        except MemoryError:

            pass

        msg = _format_exception()

        self.assertStartsWith(msg,

            "bzr: out of memory\nMemory dumped to ")

    def test_format_os_error(self):

        try:

            os.rmdir('nosuchfile22222')

        except OSError, e:

            e_str = str(e)

        msg = _format_exception()

        # Linux seems to give "No such file" but Windows gives "The system

        # cannot find the file specified".

        self.assertEqual('bzr: ERROR: %s\n' % (e_str,), msg)

    def test_format_io_error(self):

        try:

            file('nosuchfile22222')

        except IOError:

            pass

        msg = _format_exception()

        # Even though Windows and Linux differ for 'os.rmdir', they both give

        # 'No such file' for open()

        self.assertContainsRe(msg,

            r'^bzr: ERROR: \[Errno .*\] No such file.*nosuchfile')

    def test_format_pywintypes_error(self):

        self.requireFeature(features.pywintypes)

        import pywintypes, win32file

        try:

            win32file.RemoveDirectory('nosuchfile22222')

        except pywintypes.error:

            pass

        msg = _format_exception()

        # GZ 2010-05-03: Formatting for pywintypes.error is basic, a 3-tuple

        #                with errno, function name, and locale error message

        self.assertContainsRe(msg,

            r"^bzr: ERROR: \(2, 'RemoveDirectory[AW]?', .*\)")

    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'Bazaar has encountered an internal error')

    def test_trace_unicode(self):

        """Write Unicode to trace log"""

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

        log = self.get_log()

        self.assertContainsRe(log, "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}')

        log = self.get_log()

        self.assertContainsRe(log, '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'))

        log = self.get_log()

        self.assertContainsRe(log, '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()

        # 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()

        # 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

        # This test checks that mutter doesn't fail; the current behaviour

        # is that it doesn't fail *and writes non-utf8*.

        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()

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

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

        # However, the log content object does unicode replacement on reading

        # to let it get unicode back where good data has been written. So we

        # have to do a replaceent here as well.

        self.assertContainsRe(log, "ascii argument: \xb5".decode('utf8',

            'replace'))

    def test_show_error(self):

        show_error('error1')

        show_error(u'error2 \xb5 blah')

        show_error('arg: %s', 'blah')

        show_error('arg2: %(key)s', {'key':'stuff'})

        try:

            raise Exception("oops")

        except:

            show_error('kwarg', exc_info=True)

        log = self.get_log()

        self.assertContainsRe(log, 'error1')

        self.assertContainsRe(log, u'error2 \xb5 blah')

        self.assertContainsRe(log, 'arg: blah')

        self.assertContainsRe(log, 'arg2: stuff')

        self.assertContainsRe(log, 'kwarg')

        self.assertContainsRe(log, 'Traceback \\(most recent call last\\):')

        self.assertContainsRe(log, 'File ".*test_trace.py", line .*, in test_show_error')

        self.assertContainsRe(log, 'raise Exception\\("oops"\\)')

        self.assertContainsRe(log, 'Exception: oops')

    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()

    def test__open_bzr_log_uses_stderr_for_failures(self):

        # If _open_bzr_log cannot open the file, then we should write the

        # warning to stderr. Since this is normally happening before logging is

        # set up.

        self.overrideAttr(sys, 'stderr', StringIO())

        # Set the log file to something that cannot exist

        # FIXME: A bit dangerous: we are not in an isolated dir here -- vilajam

        # 20100125

        os.environ['BZR_LOG'] = os.getcwd() + '/no-dir/bzr.log'

        self.overrideAttr(trace, '_bzr_log_filename')

        logf = trace._open_bzr_log()

        self.assertIs(None, logf)

        self.assertContainsRe(sys.stderr.getvalue(),

                              'failed to open trace file: .*/no-dir/bzr.log')

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.writelines(['test_log_rollover padding\n'] * 200000)

        trace_file.close()

        _rollover_trace_maybe(temp_log_name)

        # should have been rolled over

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

class TestTraceConfiguration(TestCaseInTempDir):

    def test_default_config(self):

        config = trace.DefaultConfig()

        self.overrideAttr(trace, "_bzr_log_filename", None)

        trace._bzr_log_filename = None

        expected_filename = trace._get_bzr_log_filename()

        self.assertEqual(None, trace._bzr_log_filename)

        config.__enter__()

        try:

            # Should have entered and setup a default filename.

            self.assertEqual(expected_filename, trace._bzr_log_filename)

        finally:

            config.__exit__(None, None, None)

            # Should have exited and cleaned up.

            self.assertEqual(None, trace._bzr_log_filename)