~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005 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

from cStringIO import StringIO

import difflib

import errno

import logging

import os

import re

import shutil

import sys

import tempfile

import unittest

import time

import codecs

import bzrlib.branch

import bzrlib.commands

from bzrlib.errors import BzrError

import bzrlib.inventory

import bzrlib.merge3

import bzrlib.osutils

import bzrlib.osutils as osutils

import bzrlib.plugin

import bzrlib.store

import bzrlib.trace

import bzrlib.changeset.serializer

from bzrlib.trace import mutter

from bzrlib.tests.TestUtil import TestLoader, TestSuite

from bzrlib.tests.treeshape import build_tree_contents

MODULES_TO_TEST = []

MODULES_TO_DOCTEST = [

                      bzrlib.branch,

                      bzrlib.changeset.serializer,

                      bzrlib.commands,

                      bzrlib.errors,

                      bzrlib.inventory,

                      bzrlib.merge3,

                      bzrlib.osutils,

                      bzrlib.store,

                      ]

def packages_to_test():

    import bzrlib.tests.blackbox

    import bzrlib.tests.changeset

    return [

            bzrlib.tests.blackbox,

            bzrlib.tests.changeset

            ]

class EarlyStoppingTestResultAdapter(object):

    """An adapter for TestResult to stop at the first first failure or error"""

    def __init__(self, result):

        self._result = result

    def addError(self, test, err):

        self._result.addError(test, err)

        self._result.stop()

    def addFailure(self, test, err):

        self._result.addFailure(test, err)

        self._result.stop()

    def __getattr__(self, name):

        return getattr(self._result, name)

    def __setattr__(self, name, value):

        if name == '_result':

            object.__setattr__(self, name, value)

        return setattr(self._result, name, value)

class _MyResult(unittest._TextTestResult):

    """Custom TestResult.

    Shows output in a different format, including displaying runtime for tests.

    """

    def _elapsedTime(self):

        return "%5dms" % (1000 * (time.time() - self._start_time))

    def startTest(self, test):

        unittest.TestResult.startTest(self, test)

        # In a short description, the important words are in

        # the beginning, but in an id, the important words are

        # at the end

        SHOW_DESCRIPTIONS = False

        if self.showAll:

            width = osutils.terminal_width()

            name_width = width - 15

            what = None

            if SHOW_DESCRIPTIONS:

                what = test.shortDescription()

                if what:

                    if len(what) > name_width:

                        what = what[:name_width-3] + '...'

            if what is None:

                what = test.id()

                if what.startswith('bzrlib.tests.'):

                    what = what[13:]

                if len(what) > name_width:

                    what = '...' + what[3-name_width:]

            what = what.ljust(name_width)

            self.stream.write(what)

        self.stream.flush()

        self._start_time = time.time()

    def addError(self, test, err):

        if isinstance(err[1], TestSkipped):

            return self.addSkipped(test, err)    

        unittest.TestResult.addError(self, test, err)

        if self.showAll:

            self.stream.writeln("ERROR %s" % self._elapsedTime())

        elif self.dots:

            self.stream.write('E')

        self.stream.flush()

    def addFailure(self, test, err):

        unittest.TestResult.addFailure(self, test, err)

        if self.showAll:

            self.stream.writeln(" FAIL %s" % self._elapsedTime())

        elif self.dots:

            self.stream.write('F')

        self.stream.flush()

    def addSuccess(self, test):

        if self.showAll:

            self.stream.writeln('   OK %s' % self._elapsedTime())

        elif self.dots:

            self.stream.write('~')

        self.stream.flush()

        unittest.TestResult.addSuccess(self, test)

    def addSkipped(self, test, skip_excinfo):

        if self.showAll:

            print >>self.stream, ' SKIP %s' % self._elapsedTime()

            print >>self.stream, '     %s' % skip_excinfo[1]

        elif self.dots:

            self.stream.write('S')

        self.stream.flush()

        # seems best to treat this as success from point-of-view of unittest

        # -- it actually does nothing so it barely matters :)

        unittest.TestResult.addSuccess(self, test)

    def printErrorList(self, flavour, errors):

        for test, err in errors:

            self.stream.writeln(self.separator1)

            self.stream.writeln("%s: %s" % (flavour,self.getDescription(test)))

            if hasattr(test, '_get_log'):

                print >>self.stream

                print >>self.stream, \

                        ('vvvv[log from %s]' % test).ljust(78,'-')

                print >>self.stream, test._get_log()

                print >>self.stream, \

                        ('^^^^[log from %s]' % test).ljust(78,'-')

            self.stream.writeln(self.separator2)

            self.stream.writeln("%s" % err)

class TextTestRunner(unittest.TextTestRunner):

    stop_on_failure = False

    def _makeResult(self):

        result = _MyResult(self.stream, self.descriptions, self.verbosity)

        if self.stop_on_failure:

            result = EarlyStoppingTestResultAdapter(result)

        return result

def iter_suite_tests(suite):

    """Return all tests in a suite, recursing through nested suites"""

    for item in suite._tests:

        if isinstance(item, unittest.TestCase):

            yield item

        elif isinstance(item, unittest.TestSuite):

            for r in iter_suite_tests(item):

                yield r

        else:

            raise Exception('unknown object %r inside test suite %r'

                            % (item, suite))

class TestSkipped(Exception):

    """Indicates that a test was intentionally skipped, rather than failing."""

    # XXX: Not used yet

class CommandFailed(Exception):

    pass

class TestCase(unittest.TestCase):

    """Base class for bzr unit tests.

    Tests that need access to disk resources should subclass 

    TestCaseInTempDir not TestCase.

    Error and debug log messages are redirected from their usual

    location into a temporary file, the contents of which can be

    retrieved by _get_log().  We use a real OS file, not an in-memory object,

    so that it can also capture file IO.  When the test completes this file

    is read into memory and removed from disk.

    There are also convenience functions to invoke bzr's command-line

    routine, and to build and check bzr trees.

    In addition to the usual method of overriding tearDown(), this class also

    allows subclasses to register functions into the _cleanups list, which is

    run in order as the object is torn down.  It's less likely this will be

    accidentally overlooked.

    """

    BZRPATH = 'bzr'

    _log_file_name = None

    _log_contents = ''

    def setUp(self):

        unittest.TestCase.setUp(self)

        self._cleanups = []

        self._cleanEnvironment()

        bzrlib.trace.disable_default_logging()

        self._startLogFile()

    def _ndiff_strings(self, a, b):

        """Return ndiff between two strings containing lines.

        A trailing newline is added if missing to make the strings

        print properly."""

        if b and b[-1] != '\n':

            b += '\n'

        if a and a[-1] != '\n':

            a += '\n'

        difflines = difflib.ndiff(a.splitlines(True),

                                  b.splitlines(True),

                                  linejunk=lambda x: False,

                                  charjunk=lambda x: False)

        return ''.join(difflines)

    def assertEqualDiff(self, a, b):

        """Assert two texts are equal, if not raise an exception.

        This is intended for use with multi-line strings where it can 

        be hard to find the differences by eye.

        """

        # TODO: perhaps override assertEquals to call this for strings?

        if a == b:

            return

        raise AssertionError("texts not equal:\n" + 

                             self._ndiff_strings(a, b))      

    def assertStartsWith(self, s, prefix):

        if not s.startswith(prefix):

            raise AssertionError('string %r does not start with %r' % (s, prefix))

    def assertEndsWith(self, s, suffix):

        if not s.endswith(prefix):

            raise AssertionError('string %r does not end with %r' % (s, suffix))

    def assertContainsRe(self, haystack, needle_re):

        """Assert that a contains something matching a regular expression."""

        if not re.search(needle_re, haystack):

            raise AssertionError('pattern "%s" not found in "%s"'

                    % (needle_re, haystack))

    def AssertSubset(self, sublist, superlist):

        """Assert that every entry in sublist is present in superlist."""

        missing = []

        for entry in sublist:

            if entry not in superlist:

                missing.append(entry)

        if len(missing) > 0:

            raise AssertionError("value(s) %r not present in container %r" % 

                                 (missing, superlist))

    def _startLogFile(self):

        """Send bzr and test log messages to a temporary file.

        The file is removed as the test is torn down.

        """

        fileno, name = tempfile.mkstemp(suffix='.log', prefix='testbzr')

        encoder, decoder, stream_reader, stream_writer = codecs.lookup('UTF-8')

        self._log_file = stream_writer(os.fdopen(fileno, 'w+'))

        bzrlib.trace.enable_test_log(self._log_file)

        self._log_file_name = name

        self.addCleanup(self._finishLogFile)

    def _finishLogFile(self):

        """Finished with the log file.

        Read contents into memory, close, and delete.

        """

        bzrlib.trace.disable_test_log()

        self._log_file.seek(0)

        self._log_contents = self._log_file.read()

        self._log_file.close()

        os.remove(self._log_file_name)

        self._log_file = self._log_file_name = None

    def addCleanup(self, callable):

        """Arrange to run a callable when this case is torn down.

        Callables are run in the reverse of the order they are registered, 

        ie last-in first-out.

        """

        if callable in self._cleanups:

            raise ValueError("cleanup function %r already registered on %s" 

                    % (callable, self))

        self._cleanups.append(callable)

    def _cleanEnvironment(self):

        new_env = {

            'HOME': os.getcwd(),

            'APPDATA': os.getcwd(),

            'BZREMAIL': None,

            'EMAIL': None,

        }

        self.__old_env = {}

        self.addCleanup(self._restoreEnvironment)

        for name, value in new_env.iteritems():

            self._captureVar(name, value)

    def _captureVar(self, name, newvalue):

        """Set an environment variable, preparing it to be reset when finished."""

        self.__old_env[name] = os.environ.get(name, None)

        if newvalue is None:

            if name in os.environ:

                del os.environ[name]

        else:

            os.environ[name] = newvalue

    @staticmethod

    def _restoreVar(name, value):

        if value is None:

            if name in os.environ:

                del os.environ[name]

        else:

            os.environ[name] = value

    def _restoreEnvironment(self):

        for name, value in self.__old_env.iteritems():

            self._restoreVar(name, value)

    def tearDown(self):

        self._runCleanups()

        unittest.TestCase.tearDown(self)

    def _runCleanups(self):

        """Run registered cleanup functions. 

        This should only be called from TestCase.tearDown.

        """

        for cleanup_fn in reversed(self._cleanups):

            cleanup_fn()

    def log(self, *args):

        mutter(*args)

    def _get_log(self):

        """Return as a string the log for this test"""

        if self._log_file_name:

            return open(self._log_file_name).read()

        else:

            return self._log_contents

        # TODO: Delete the log after it's been read in

    def capture(self, cmd, retcode=0):

        """Shortcut that splits cmd into words, runs, and returns stdout"""

        return self.run_bzr_captured(cmd.split(), retcode=retcode)[0]

    def run_bzr_captured(self, argv, retcode=0):

        """Invoke bzr and return (stdout, stderr).

        Useful for code that wants to check the contents of the

        output, the way error messages are presented, etc.

        This should be the main method for tests that want to exercise the

        overall behavior of the bzr application (rather than a unit test

        or a functional test of the library.)

        Much of the old code runs bzr by forking a new copy of Python, but

        that is slower, harder to debug, and generally not necessary.

        This runs bzr through the interface that catches and reports

        errors, and with logging set to something approximating the

        default, so that error reporting can be checked.

        argv -- arguments to invoke bzr

        retcode -- expected return code, or None for don't-care.

        """

        stdout = StringIO()

        stderr = StringIO()

        self.log('run bzr: %s', ' '.join(argv))

        # FIXME: don't call into logging here

        handler = logging.StreamHandler(stderr)

        handler.setFormatter(bzrlib.trace.QuietFormatter())

        handler.setLevel(logging.INFO)

        logger = logging.getLogger('')

        logger.addHandler(handler)

        try:

            result = self.apply_redirected(None, stdout, stderr,

                                           bzrlib.commands.run_bzr_catch_errors,

                                           argv)

        finally:

            logger.removeHandler(handler)

        out = stdout.getvalue()

        err = stderr.getvalue()

        if out:

            self.log('output:\n%s', out)

        if err:

            self.log('errors:\n%s', err)

        if retcode is not None:

            self.assertEquals(result, retcode)

        return out, err

    def run_bzr(self, *args, **kwargs):

        """Invoke bzr, as if it were run from the command line.

        This should be the main method for tests that want to exercise the

        overall behavior of the bzr application (rather than a unit test

        or a functional test of the library.)

        This sends the stdout/stderr results into the test's log,

        where it may be useful for debugging.  See also run_captured.

        """

        retcode = kwargs.pop('retcode', 0)

        return self.run_bzr_captured(args, retcode)

    def check_inventory_shape(self, inv, shape):

        """Compare an inventory to a list of expected names.

        Fail if they are not precisely equal.

        """

        extras = []

        shape = list(shape)             # copy

        for path, ie in inv.entries():

            name = path.replace('\\', '/')

            if ie.kind == 'dir':

                name = name + '/'

            if name in shape:

                shape.remove(name)

            else:

                extras.append(name)

        if shape:

            self.fail("expected paths not found in inventory: %r" % shape)

        if extras:

            self.fail("unexpected paths found in inventory: %r" % extras)

    def apply_redirected(self, stdin=None, stdout=None, stderr=None,

                         a_callable=None, *args, **kwargs):

        """Call callable with redirected std io pipes.

        Returns the return code."""

        if not callable(a_callable):

            raise ValueError("a_callable must be callable.")

        if stdin is None:

            stdin = StringIO("")

        if stdout is None:

            if hasattr(self, "_log_file"):

                stdout = self._log_file

            else:

                stdout = StringIO()

        if stderr is None:

            if hasattr(self, "_log_file"):

                stderr = self._log_file

            else:

                stderr = StringIO()

        real_stdin = sys.stdin

        real_stdout = sys.stdout

        real_stderr = sys.stderr

        try:

            sys.stdout = stdout

            sys.stderr = stderr

            sys.stdin = stdin

            return a_callable(*args, **kwargs)

        finally:

            sys.stdout = real_stdout

            sys.stderr = real_stderr

            sys.stdin = real_stdin

BzrTestBase = TestCase

class TestCaseInTempDir(TestCase):

    """Derived class that runs a test within a temporary directory.

    This is useful for tests that need to create a branch, etc.

    The directory is created in a slightly complex way: for each

    Python invocation, a new temporary top-level directory is created.

    All test cases create their own directory within that.  If the

    tests complete successfully, the directory is removed.

    InTempDir is an old alias for FunctionalTestCase.

    """

    TEST_ROOT = None

    _TEST_NAME = 'test'

    OVERRIDE_PYTHON = 'python'

    def check_file_contents(self, filename, expect):

        self.log("check contents of file %s" % filename)

        contents = file(filename, 'r').read()

        if contents != expect:

            self.log("expected: %r" % expect)

            self.log("actually: %r" % contents)

            self.fail("contents of %s not as expected" % filename)

    def _make_test_root(self):

        if TestCaseInTempDir.TEST_ROOT is not None:

            return

        i = 0

        while True:

            root = u'test%04d.tmp' % i

            try:

                os.mkdir(root)

            except OSError, e:

                if e.errno == errno.EEXIST:

                    i += 1

                    continue

                else:

                    raise

            # successfully created

            TestCaseInTempDir.TEST_ROOT = osutils.abspath(root)

            break

        # make a fake bzr directory there to prevent any tests propagating

        # up onto the source directory's real branch

        os.mkdir(osutils.pathjoin(TestCaseInTempDir.TEST_ROOT, '.bzr'))

    def setUp(self):

        super(TestCaseInTempDir, self).setUp()

        self._make_test_root()

        _currentdir = os.getcwdu()

        short_id = self.id().replace('bzrlib.tests.', '') \

                   .replace('__main__.', '')

        self.test_dir = osutils.pathjoin(self.TEST_ROOT, short_id)

        os.mkdir(self.test_dir)

        os.chdir(self.test_dir)

        os.environ['HOME'] = self.test_dir

        os.environ['APPDATA'] = self.test_dir

        def _leaveDirectory():

            os.chdir(_currentdir)

        self.addCleanup(_leaveDirectory)

    def build_tree(self, shape, line_endings='native'):

        """Build a test tree according to a pattern.

        shape is a sequence of file specifications.  If the final

        character is '/', a directory is created.

        This doesn't add anything to a branch.

        :param line_endings: Either 'binary' or 'native'

                             in binary mode, exact contents are written

                             in native mode, the line endings match the

                             default platform endings.

        """

        # XXX: It's OK to just create them using forward slashes on windows?

        for name in shape:

            self.assert_(isinstance(name, basestring))

            if name[-1] == '/':

                os.mkdir(name[:-1])

            else:

                if line_endings == 'binary':

                    f = file(name, 'wb')

                elif line_endings == 'native':

                    f = file(name, 'wt')

                else:

                    raise BzrError('Invalid line ending request %r' % (line_endings,))

                print >>f, "contents of", name

                f.close()

    def build_tree_contents(self, shape):

        build_tree_contents(shape)

    def failUnlessExists(self, path):

        """Fail unless path, which may be abs or relative, exists."""

        self.failUnless(osutils.lexists(path))

    def failIfExists(self, path):

        """Fail if path, which may be abs or relative, exists."""

        self.failIf(osutils.lexists(path))

    def assertFileEqual(self, content, path):

        """Fail if path does not contain 'content'."""

        self.failUnless(osutils.lexists(path))

        self.assertEqualDiff(content, open(path, 'r').read())

def filter_suite_by_re(suite, pattern):

    result = TestSuite()

    filter_re = re.compile(pattern)

    for test in iter_suite_tests(suite):

        if filter_re.search(test.id()):

            result.addTest(test)

    return result

def run_suite(suite, name='test', verbose=False, pattern=".*",

              stop_on_failure=False, keep_output=False):

    TestCaseInTempDir._TEST_NAME = name

    if verbose:

        verbosity = 2

    else:

        verbosity = 1

    runner = TextTestRunner(stream=sys.stdout,

                            descriptions=0,

                            verbosity=verbosity)

    runner.stop_on_failure=stop_on_failure

    if pattern != '.*':

        suite = filter_suite_by_re(suite, pattern)

    result = runner.run(suite)

    # This is still a little bogus, 

    # but only a little. Folk not using our testrunner will

    # have to delete their temp directories themselves.

    if result.wasSuccessful() or not keep_output:

        if TestCaseInTempDir.TEST_ROOT is not None:

            shutil.rmtree(TestCaseInTempDir.TEST_ROOT) 

    else:

        print "Failed tests working directories are in '%s'\n" % TestCaseInTempDir.TEST_ROOT

    return result.wasSuccessful()

def selftest(verbose=False, pattern=".*", stop_on_failure=True,

             keep_output=False):

    """Run the whole test suite under the enhanced runner"""

    return run_suite(test_suite(), 'testbzr', verbose=verbose, pattern=pattern,

                     stop_on_failure=stop_on_failure, keep_output=keep_output)

def test_suite():

    """Build and return TestSuite for the whole program."""

    from doctest import DocTestSuite