Source code for nose2.main

import logging
import os
import sys
import unittest

from nose2 import events, loader, runner, session, util, plugins


log = logging.getLogger(__name__)
__unittest = True


[docs]class PluggableTestProgram(unittest.TestProgram): """TestProgram that enables plugins. Accepts the same parameters as :class:`unittest.TestProgram`, but most of them are ignored as their functions are handled by plugins. :param module: Module in which to run tests. Default: :func:`__main__` :param defaultTest: Default test name. Default: ``None`` :param argv: Command line args. Default: ``sys.argv`` :param testRunner: *IGNORED* :param testLoader: *IGNORED* :param exit: Exit after running tests? :param verbosity: Base verbosity :param failfast: *IGNORED* :param catchbreak: *IGNORED* :param buffer: *IGNORED* :param plugins: List of additional plugin modules to load :param excludePlugins: List of plugin modules to exclude :param extraHooks: List of hook names and plugin *instances* to register with the session's hooks system. Each item in the list must be a 2-tuple of (hook name, plugin instance) .. attribute :: sessionClass The class to instantiate to create a test run configuration session. Default: :class:`nose2.session.Session` .. attribute :: loaderClass The class to instantiate to create a test loader. Default: :class:`nose2.loader.PluggableTestLoader`. .. warning :: Overriding this attribute is the only way to customize the test loader class. Passing a test loader to :func:`__init__` does not work. .. attribute :: runnerClass The class to instantiate to create a test runner. Default: :class:`nose2.runner.PluggableTestRunner`. .. warning :: Overriding this attribute is the only way to customize the test runner class. Passing a test runner to :func:`__init__` does not work. .. attribute :: defaultPlugins List of default plugin modules to load. """ sessionClass = session.Session _currentSession = None loaderClass = loader.PluggableTestLoader runnerClass = runner.PluggableTestRunner defaultPlugins = plugins.DEFAULT_PLUGINS excludePlugins = () # XXX override __init__ to warn that testLoader and testRunner are ignored? def __init__(self, **kw): plugins = kw.pop('plugins', []) exclude = kw.pop('excludePlugins', []) hooks = kw.pop('extraHooks', []) self.defaultPlugins = list(self.defaultPlugins) self.excludePlugins = list(self.excludePlugins) self.extraHooks = hooks self.defaultPlugins.extend(plugins) self.excludePlugins.extend(exclude) super(PluggableTestProgram, self).__init__(**kw)
[docs] def parseArgs(self, argv): """Parse command line args Parses arguments and creates a configuration session, then calls :func:`createTests`. """ self.session = self.sessionClass() self.__class__._currentSession = self.session self.argparse = self.session.argparse # for convenience # XXX force these? or can it be avoided? self.testLoader = self.loaderClass(self.session) self.session.testLoader = self.testLoader # Parse initial arguments like config file paths, verbosity self.setInitialArguments() # FIXME -h here makes processing stop. cfg_args, argv = self.argparse.parse_known_args(argv[1:]) self.handleCfgArgs(cfg_args) # Parse arguments for plugins (if any) and test names self.argparse.add_argument('testNames', nargs='*') # add help arg now so -h will also print plugin opts self.argparse.add_argument('-h', '--help', action='help', help=('Show this help message and exit')) args, argv = self.argparse.parse_known_args(argv) if argv: self.argparse.error("Unrecognized arguments: %s" % ' '.join(argv)) self.handleArgs(args) self.createTests()
[docs] def setInitialArguments(self): """Set pre-plugin command-line arguments. This set of arguments is parsed out of the command line before plugins are loaded. """ self.argparse.add_argument( '-s', '--start-dir', default=None, help="Directory to start discovery ('.' default)") self.argparse.add_argument( '-t', '--top-level-directory', '--project-directory', help='Top level directory of project (defaults to start dir)') self.argparse.add_argument( '--config', '-c', nargs='?', action='append', default=['unittest.cfg', 'nose2.cfg'], help="Config files to load, if they exist. ('unittest.cfg' " "and 'nose2.cfg' in start directory default)") self.argparse.add_argument( '--no-user-config', action='store_const', dest='user_config', const=False, default=True, help="Do not load user config files") self.argparse.add_argument( '--no-plugins', action='store_const', dest='load_plugins', const=False, default=True, help="Do not load any plugins. Warning: nose2 does not " "do anything if no plugins are loaded") self.argparse.add_argument( '--plugin', action='append', dest='plugins', default=[], help="Load this plugin module.") self.argparse.add_argument( '--exclude-plugin', action='append', dest='exclude_plugins', default=[], help="Do not load this plugin module") self.argparse.add_argument( '--verbose', '-v', action='count', default=0, help="print test case names and statuses") self.argparse.add_argument('--quiet', action='store_const', dest='verbose', const=0) self.argparse.add_argument( '--log-level', default=logging.WARN, help='Set logging level for message logged to console.')
[docs] def handleCfgArgs(self, cfg_args): """Handle initial arguments. Handle the initial, pre-plugin arguments parsed out of the command line. """ self.session.logLevel = util.parse_log_level(cfg_args.log_level) logging.basicConfig(level=self.session.logLevel) log.debug('logging initialized %s', cfg_args.log_level) if cfg_args.verbose: self.session.verbosity += cfg_args.verbose self.session.startDir = cfg_args.start_dir if cfg_args.top_level_directory: self.session.topLevelDir = cfg_args.top_level_directory self.session.loadConfigFiles(*self.findConfigFiles(cfg_args)) self.session.setStartDir() self.session.prepareSysPath() if cfg_args.load_plugins: self.defaultPlugins.extend(cfg_args.plugins) self.excludePlugins.extend(cfg_args.exclude_plugins) self.loadPlugins() elif cfg_args.plugins or cfg_args.exclude_plugins: log.warn("Both '--no-plugins' and '--plugin' or '--exclude-plugin' " "specified. No plugins were loaded.")
[docs] def findConfigFiles(self, cfg_args): """Find available config files""" filenames = cfg_args.config[:] proj_opts = ('unittest.cfg', 'nose2.cfg') for fn in proj_opts: if cfg_args.top_level_directory: fn = os.path.abspath( os.path.join(cfg_args.top_level_directory, fn)) filenames.append(fn) if cfg_args.user_config: user_opts = ('~/.unittest.cfg', '~/.nose2.cfg') for fn in user_opts: filenames.append(os.path.expanduser(fn)) return filenames
[docs] def handleArgs(self, args): """Handle further arguments. Handle arguments parsed out of command line after plugins have been loaded (and injected their argument configuration). """ self.testNames = args.testNames self.session.hooks.handleArgs(events.CommandLineArgsEvent(args=args))
[docs] def loadPlugins(self): """Load available plugins :func:`self.defaultPlugins`` and :func:`self.excludePlugins` are passed to the session to alter the list of plugins that will be loaded. This method also registers any (hook, plugin) pairs set in ``self.hooks``. This is a good way to inject plugins that fall outside of the normal loading procedure, for example, plugins that need some runtime information that can't easily be passed to them through the configuration system. """ self.session.loadPlugins(self.defaultPlugins, self.excludePlugins) for method_name, plugin in self.extraHooks: self.session.hooks.register(method_name, plugin)
[docs] def createTests(self): """Create top-level test suite""" event = events.CreateTestsEvent( self.testLoader, self.testNames, self.module) result = self.session.hooks.createTests(event) if event.handled: test = result else: log.debug("Create tests from %s/%s", self.testNames, self.module) test = self.testLoader.loadTestsFromNames( self.testNames, self.module) event = events.CreatedTestSuiteEvent(test) result = self.session.hooks.createdTestSuite(event) if event.handled: test = result self.test = test
[docs] def runTests(self): """Run tests""" # fire plugin hook runner = self._makeRunner() try: self.result = runner.run(self.test) except Exception as e: log.exception('Internal Error') sys.stderr.write('Internal Error: runTests aborted: %s\n'%(e)) if self.exit: sys.exit(1) if self.exit: sys.exit(not self.result.wasSuccessful())
def _makeRunner(self): runner = self.runnerClass(self.session) event = events.RunnerCreatedEvent(runner) self.session.hooks.runnerCreated(event) self.session.testRunner = event.runner return event.runner
[docs] @classmethod def getCurrentSession(cls): """Returns the current session, or ``None`` if no :class:`nose2.session.Session` is running. """ return cls._currentSession
main = PluggableTestProgram
[docs]def discover(*args, **kwargs): """Main entry point for test discovery. Running discover calls :class:`nose2.main.PluggableTestProgram`, passing through all arguments and keyword arguments **except module**: ``module`` is discarded, to force test discovery. """ kwargs['module'] = None return main(*args, **kwargs)