# 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 TestBase. The test runner should call runsuite(). This is meant to become independent of bzr, though that's not quite true yet. """ from unittest import TestResult, TestCase 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 TestBase(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' _log_buf = "" def setUp(self): super(TestBase, self).setUp() self.log("%s setup" % self.id()) def tearDown(self): super(TestBase, self).tearDown() self.log("%s teardown" % self.id()) self.log('') 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""" self._log_buf = self._log_buf + str(msg) + '\n' 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" % expected) self.log("actually: %r" % contents) self.fail("contents of %s not as expected") class InTempDir(TestBase): """Base class for tests run in a temporary branch.""" def setUp(self): 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) class _MyResult(TestResult): """ Custom TestResult. No special behaviour for now. """ def __init__(self, out): self.out = out TestResult.__init__(self) def startTest(self, 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() print >>self.out, '%-60.60s' % what, self.out.flush() TestResult.startTest(self, test) def stopTest(self, test): # print TestResult.stopTest(self, test) def addError(self, test, err): print >>self.out, 'ERROR' TestResult.addError(self, test, err) _show_test_failure('error', test, err, self.out) def addFailure(self, test, err): print >>self.out, 'FAILURE' TestResult.addFailure(self, test, err) _show_test_failure('failure', test, err, self.out) def addSuccess(self, test): print >>self.out, 'OK' TestResult.addSuccess(self, test) def run_suite(suite, name="test"): import os import shutil import time import sys _setup_test_log(name) _setup_test_dir(name) print # save stdout & stderr so there's no leakage from code-under-test real_stdout = sys.stdout real_stderr = sys.stderr sys.stdout = sys.stderr = TestBase.TEST_LOG try: result = _MyResult(real_stdout) suite.run(result) finally: sys.stdout = real_stdout sys.stderr = real_stderr _show_results(result) return result.wasSuccessful() def _setup_test_log(name): import time import os log_filename = os.path.abspath(name + '.log') TestBase.TEST_LOG = open(log_filename, 'wt', buffering=1) # line buffered print >>TestBase.TEST_LOG, "tests run at " + time.ctime() print '%-30s %s' % ('test log', log_filename) def _setup_test_dir(name): import os import shutil TestBase.ORIG_DIR = os.getcwdu() TestBase.TEST_ROOT = os.path.abspath(name + '.tmp') print '%-30s %s' % ('running tests in', TestBase.TEST_ROOT) if os.path.exists(TestBase.TEST_ROOT): shutil.rmtree(TestBase.TEST_ROOT) os.mkdir(TestBase.TEST_ROOT) os.chdir(TestBase.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(TestBase.TEST_ROOT, '.bzr')) def _show_results(result): print print '%4d tests run' % result.testsRun print '%4d errors' % len(result.errors) print '%4d failures' % len(result.failures) def _show_test_failure(kind, case, exc_info, out): from traceback import print_exception print >>out, '-' * 60 print >>out, case desc = case.shortDescription() if desc: print >>out, ' (%s)' % desc print_exception(exc_info[0], exc_info[1], exc_info[2], None, out) if isinstance(case, TestBase): print >>out print >>out, 'log from this test:' print >>out, case._log_buf print >>out, '-' * 60