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plugins
testid.py
""" This plugin adds a test id (like #1) to each test name output. After you've run once to generate test ids, you can re-run individual tests by activating the plugin and passing the ids (with or without the # prefix) instead of test names. For example, if your normal test run looks like:: % nosetests -v tests.test_a ... ok tests.test_b ... ok tests.test_c ... ok When adding ``--with-id`` you'll see:: % nosetests -v --with-id #1 tests.test_a ... ok #2 tests.test_b ... ok #3 tests.test_c ... ok Then you can re-run individual tests by supplying just an id number:: % nosetests -v --with-id 2 #2 tests.test_b ... ok You can also pass multiple id numbers:: % nosetests -v --with-id 2 3 #2 tests.test_b ... ok #3 tests.test_c ... ok Since most shells consider '#' a special character, you can leave it out when specifying a test id. Note that when run without the -v switch, no special output is displayed, but the ids file is still written. Looping over failed tests ------------------------- This plugin also adds a mode that will direct the test runner to record failed tests. Subsequent test runs will then run only the tests that failed last time. Activate this mode with the ``--failed`` switch:: % nosetests -v --failed #1 test.test_a ... ok #2 test.test_b ... ERROR #3 test.test_c ... FAILED #4 test.test_d ... ok On the second run, only tests #2 and #3 will run:: % nosetests -v --failed #2 test.test_b ... ERROR #3 test.test_c ... FAILED As you correct errors and tests pass, they'll drop out of subsequent runs. First:: % nosetests -v --failed #2 test.test_b ... ok #3 test.test_c ... FAILED Second:: % nosetests -v --failed #3 test.test_c ... FAILED When all tests pass, the full set will run on the next invocation. First:: % nosetests -v --failed #3 test.test_c ... ok Second:: % nosetests -v --failed #1 test.test_a ... ok #2 test.test_b ... ok #3 test.test_c ... ok #4 test.test_d ... ok .. note :: If you expect to use ``--failed`` regularly, it's a good idea to always run using the ``--with-id`` option. This will ensure that an id file is always created, allowing you to add ``--failed`` to the command line as soon as you have failing tests. Otherwise, your first run using ``--failed`` will (perhaps surprisingly) run *all* tests, because there won't be an id file containing the record of failed tests from your previous run. """ __test__ = False import logging import os from nose.plugins import Plugin from nose.util import src, set try: from pickle import dump, load except ImportError: from pickle import dump, load log = logging.getLogger(__name__) class TestId(Plugin): """ Activate to add a test id (like #1) to each test name output. Activate with --failed to rerun failing tests only. """ name = 'id' idfile = None collecting = True loopOnFailed = False def options(self, parser, env): """Register commandline options. """ Plugin.options(self, parser, env) parser.add_option('--id-file', action='store', dest='testIdFile', default='.noseids', metavar="FILE", help="Store test ids found in test runs in this " "file. Default is the file .noseids in the " "working directory.") parser.add_option('--failed', action='store_true', dest='failed', default=False, help="Run the tests that failed in the last " "test run.") def configure(self, options, conf): """Configure plugin. """ Plugin.configure(self, options, conf) if options.failed: self.enabled = True self.loopOnFailed = True log.debug("Looping on failed tests") self.idfile = os.path.expanduser(options.testIdFile) if not os.path.isabs(self.idfile): self.idfile = os.path.join(conf.workingDir, self.idfile) self.id = 1 # Ids and tests are mirror images: ids are {id: test address} and # tests are {test address: id} self.ids = {} self.tests = {} self.failed = [] self.source_names = [] # used to track ids seen when tests is filled from # loaded ids file self._seen = {} self._write_hashes = conf.verbosity >= 2 def finalize(self, result): """Save new ids file, if needed. """ if result.wasSuccessful(): self.failed = [] if self.collecting: ids = dict(list(zip(list(self.tests.values()), list(self.tests.keys())))) else: ids = self.ids fh = open(self.idfile, 'wb') dump({'ids': ids, 'failed': self.failed, 'source_names': self.source_names}, fh) fh.close() log.debug('Saved test ids: %s, failed %s to %s', ids, self.failed, self.idfile) def loadTestsFromNames(self, names, module=None): """Translate ids in the list of requested names into their test addresses, if they are found in my dict of tests. """ log.debug('ltfn %s %s', names, module) try: fh = open(self.idfile, 'rb') data = load(fh) if 'ids' in data: self.ids = data['ids'] self.failed = data['failed'] self.source_names = data['source_names'] else: # old ids field self.ids = data self.failed = [] self.source_names = names if self.ids: self.id = max(self.ids) + 1 self.tests = dict(list(zip(list(self.ids.values()), list(self.ids.keys())))) else: self.id = 1 log.debug( 'Loaded test ids %s tests %s failed %s sources %s from %s', self.ids, self.tests, self.failed, self.source_names, self.idfile) fh.close() except ValueError as e: # load() may throw a ValueError when reading the ids file, if it # was generated with a newer version of Python than we are currently # running. log.debug('Error loading %s : %s', self.idfile, str(e)) except IOError: log.debug('IO error reading %s', self.idfile) if self.loopOnFailed and self.failed: self.collecting = False names = self.failed self.failed = [] # I don't load any tests myself, only translate names like '#2' # into the associated test addresses translated = [] new_source = [] really_new = [] for name in names: trans = self.tr(name) if trans != name: translated.append(trans) else: new_source.append(name) # names that are not ids and that are not in the current # list of source names go into the list for next time if new_source: new_set = set(new_source) old_set = set(self.source_names) log.debug("old: %s new: %s", old_set, new_set) really_new = [s for s in new_source if not s in old_set] if really_new: # remember new sources self.source_names.extend(really_new) if not translated: # new set of source names, no translations # means "run the requested tests" names = new_source else: # no new names to translate and add to id set self.collecting = False log.debug("translated: %s new sources %s names %s", translated, really_new, names) return (None, translated + really_new or names) def makeName(self, addr): log.debug("Make name %s", addr) filename, module, call = addr if filename is not None: head = src(filename) else: head = module if call is not None: return "%s:%s" % (head, call) return head def setOutputStream(self, stream): """Get handle on output stream so the plugin can print id #s """ self.stream = stream def startTest(self, test): """Maybe output an id # before the test name. Example output:: #1 test.test ... ok #2 test.test_two ... ok """ adr = test.address() log.debug('start test %s (%s)', adr, adr in self.tests) if adr in self.tests: if adr in self._seen: self.write(' ') else: self.write('#%s ' % self.tests[adr]) self._seen[adr] = 1 return self.tests[adr] = self.id self.write('#%s ' % self.id) self.id += 1 def afterTest(self, test): # None means test never ran, False means failed/err if test.passed is False: try: key = str(self.tests[test.address()]) except KeyError: # never saw this test -- startTest didn't run pass else: if key not in self.failed: self.failed.append(key) def tr(self, name): log.debug("tr '%s'", name) try: key = int(name.replace('#', '')) except ValueError: return name log.debug("Got key %s", key) # I'm running tests mapped from the ids file, # not collecting new ones if key in self.ids: return self.makeName(self.ids[key]) return name def write(self, output): if self._write_hashes: self.stream.write(output)
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