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# 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
"""Enhanced layer on unittest.
This does several things:
* nicer reporting as tests run
* test code can log messages into a buffer that is recorded to disk
and displayed if the test fails
* tests can be run in a separate directory, which is useful for code that
wants to create files
* utilities to run external commands and check their return code
and/or output
Test cases should normally subclass testsweet.TestCase. The test runner should
call runsuite().
This is meant to become independent of bzr, though that's not quite
true yet.
"""
import unittest
import sys
# XXX: Don't need this anymore now we depend on python2.4
def _need_subprocess():
sys.stderr.write("sorry, this test suite requires the subprocess module\n"
"this is shipped with python2.4 and available separately for 2.3\n")
class CommandFailed(Exception):
pass
class TestSkipped(Exception):
"""Indicates that a test was intentionally skipped, rather than failing."""
# XXX: Not used yet
class TestCase(unittest.TestCase):
"""Base class for bzr test cases.
Just defines some useful helper functions; doesn't actually test
anything.
"""
# TODO: Special methods to invoke bzr, so that we can run it
# through a specified Python intepreter
OVERRIDE_PYTHON = None # to run with alternative python 'python'
BZRPATH = 'bzr'
def setUp(self):
super(TestCase, self).setUp()
# setup a temporary log for the test
import time
import os
import tempfile
self.TEST_LOG = tempfile.NamedTemporaryFile(mode='wt', bufsize=0)
# save stdout & stderr so there's no leakage from code-under-test
self.real_stdout = sys.stdout
self.real_stderr = sys.stderr
sys.stdout = sys.stderr = self.TEST_LOG
self.log("%s setup" % self.id())
def tearDown(self):
sys.stdout = self.real_stdout
sys.stderr = self.real_stderr
self.log("%s teardown" % self.id())
self.log('')
super(TestCase, self).tearDown()
def formcmd(self, cmd):
if isinstance(cmd, basestring):
cmd = cmd.split()
if cmd[0] == 'bzr':
cmd[0] = self.BZRPATH
if self.OVERRIDE_PYTHON:
cmd.insert(0, self.OVERRIDE_PYTHON)
self.log('$ %r' % cmd)
return cmd
def runcmd(self, cmd, retcode=0):
"""Run one command and check the return code.
Returns a tuple of (stdout,stderr) strings.
If a single string is based, it is split into words.
For commands that are not simple space-separated words, please
pass a list instead."""
try:
import shutil
from subprocess import call
except ImportError, e:
_need_subprocess()
raise
cmd = self.formcmd(cmd)
self.log('$ ' + ' '.join(cmd))
actual_retcode = call(cmd, stdout=self.TEST_LOG, stderr=self.TEST_LOG)
if retcode != actual_retcode:
raise CommandFailed("test failed: %r returned %d, expected %d"
% (cmd, actual_retcode, retcode))
def backtick(self, cmd, retcode=0):
"""Run a command and return its output"""
try:
import shutil
from subprocess import Popen, PIPE
except ImportError, e:
_need_subprocess()
raise
cmd = self.formcmd(cmd)
child = Popen(cmd, stdout=PIPE, stderr=self.TEST_LOG)
outd, errd = child.communicate()
self.log(outd)
actual_retcode = child.wait()
outd = outd.replace('\r', '')
if retcode != actual_retcode:
raise CommandFailed("test failed: %r returned %d, expected %d"
% (cmd, actual_retcode, retcode))
return outd
def build_tree(self, shape):
"""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.
"""
# XXX: It's OK to just create them using forward slashes on windows?
import os
for name in shape:
assert isinstance(name, basestring)
if name[-1] == '/':
os.mkdir(name[:-1])
else:
f = file(name, 'wt')
print >>f, "contents of", name
f.close()
def log(self, msg):
"""Log a message to a progress file"""
print >>self.TEST_LOG, msg
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 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")
def _get_log(self):
"""Get the log the test case used. This can only be called once,
after which an exception will be raised.
"""
self.TEST_LOG.flush()
log = open(self.TEST_LOG.name, 'rt').read()
self.TEST_LOG.close()
return log
class InTempDir(TestCase):
"""Base class for tests run in a temporary branch."""
def setUp(self):
super(InTempDir, self).setUp()
import os
self.test_dir = os.path.join(self.TEST_ROOT, self.__class__.__name__)
os.mkdir(self.test_dir)
os.chdir(self.test_dir)
def tearDown(self):
import os
os.chdir(self.TEST_ROOT)
super(InTempDir, self).tearDown()
class _MyResult(unittest._TextTestResult):
"""
Custom TestResult.
No special behaviour for now.
"""
def __init__(self, out, style):
super(_MyResult, self).__init__(out, False, 0)
self.out = out
assert style in ('none', 'progress', 'verbose')
self.style = style
def startTest(self, test):
super(_MyResult, self).startTest(test)
# TODO: Maybe show test.shortDescription somewhere?
what = test.id()
# python2.3 has the bad habit of just "runit" for doctests
if what == 'runit':
what = test.shortDescription()
if self.style == 'verbose':
print >>self.out, '%-60.60s' % what,
self.out.flush()
def addError(self, test, err):
if self.style == 'verbose':
print >>self.out, 'ERROR'
elif self.style == 'progress':
self.stream.write('E')
self.stream.flush()
super(_MyResult, self).addError(test, err)
def addFailure(self, test, err):
if self.style == 'verbose':
print >>self.out, 'FAILURE'
elif self.style == 'progress':
self.stream.write('F')
self.stream.flush()
super(_MyResult, self).addFailure(test, err)
def addSuccess(self, test):
if self.style == 'verbose':
print >>self.out, 'OK'
elif self.style == 'progress':
self.stream.write('~')
self.stream.flush()
super(_MyResult, self).addSuccess(test)
def printErrors(self):
if self.style == 'progress':
self.stream.writeln()
super(_MyResult, self).printErrors()
def printErrorList(self, flavour, errors):
for test, err in errors:
self.stream.writeln(self.separator1)
self.stream.writeln("%s: %s" % (flavour,self.getDescription(test)))
self.stream.writeln(self.separator2)
self.stream.writeln("%s" % err)
if isinstance(test, TestCase):
self.stream.writeln()
self.stream.writeln('log from this test:')
print >>self.stream, test._get_log()
class TestSuite(unittest.TestSuite):
def __init__(self, tests=(), name='test'):
super(TestSuite, self).__init__(tests)
self._name = name
def run(self, result):
self._setup_test_dir()
return super(TestSuite,self).run(result)
def _setup_test_dir(self):
import os
import shutil
TestCase.ORIG_DIR = os.getcwdu()
TestCase.TEST_ROOT = os.path.abspath(self._name + '.tmp')
print '%-30s %s\n' % ('running tests in', TestCase.TEST_ROOT)
if os.path.exists(TestCase.TEST_ROOT):
shutil.rmtree(TestCase.TEST_ROOT)
os.mkdir(TestCase.TEST_ROOT)
os.chdir(TestCase.TEST_ROOT)
# make a fake bzr directory there to prevent any tests propagating
# up onto the source directory's real branch
os.mkdir(os.path.join(TestCase.TEST_ROOT, '.bzr'))
class TextTestRunner(unittest.TextTestRunner):
def __init__(self, stream=sys.stderr, descriptions=1, verbosity=0, style='progress'):
super(TextTestRunner, self).__init__(stream, descriptions, verbosity)
self.style = style
def _makeResult(self):
return _MyResult(self.stream, self.style)
# If we want the old 4 line summary output (count, 0 failures, 0 errors)
# we can override run() too.
def run_suite(a_suite, name='test', verbose=False):
suite = TestSuite((a_suite,),name)
if verbose:
style = 'verbose'
else:
style = 'progress'
runner = TextTestRunner(stream=sys.stdout, style=style)
result = runner.run(suite)
return result.wasSuccessful()
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