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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at http://mozilla.org/MPL/2.0/.
import copy
from datetime import datetime
import handlers
import json
from optparse import OptionGroup
import os
import socket
import sys
import tempfile
from time import sleep
import traceback
from manifestparser import TestManifest
import mozinfo
import mozrunner
from mozrunner.application import get_app_context
from mozrunner.utils import get_metadata_from_egg
import mozversion
import wptserve
import jsbridge
from .errors import *
# metadata
package_metadata = get_metadata_from_egg('mozmill')
js_module_template = 'Components.utils.import("resource://mozmill/%s")'
js_module_frame = js_module_template % 'modules/frame.js'
js_module_mozmill = js_module_template % 'driver/mozmill.js'
basedir = os.path.abspath(os.path.dirname(__file__))
extension_path = os.path.join(basedir, 'extension')
# defaults
ADDONS = [extension_path, jsbridge.extension_path]
JSBRIDGE_TIMEOUT = 60.
# Environment variables
ENVIRONMENT = {
# Disable the internal crash reporter
'MOZ_CRASHREPORTER_NO_REPORT': '1',
}
class TestResults(object):
"""Class to accumulate test results and other information."""
def __init__(self):
# application information
self.appinfo = {}
# other information
self.mozmill_version = package_metadata.get('Version')
self.screenshots = []
# test statistics
self.alltests = []
self.fails = []
self.passes = []
self.skipped = []
# total test run time
self.starttime = datetime.utcnow()
self.endtime = None
def events(self):
"""Events, the MozMill class will dispatch to."""
return {'mozmill.endTest': self.endTest_listener}
### event listener
def endTest_listener(self, test):
"""Add current test result to results."""
self.alltests.append(test)
if test.get('skipped', False):
self.skipped.append(test)
elif test['failed'] > 0:
if self.mozmill.running_test.get('expected') == 'fail':
self.passes.append(test)
else:
self.fails.append(test)
else:
if self.mozmill.running_test.get('expected') == 'fail':
self.fails.append(test)
else:
self.passes.append(test)
class MozMill(object):
"""MozMill is a test runner.
You should use MozMill as follows:
m = MozMill(...)
m.run(tests)
m.run(other_tests)
results = m.finish()
"""
@classmethod
def create(cls, binary=None, jsbridge_timeout=JSBRIDGE_TIMEOUT,
handlers=None, app='firefox', profile_args=None,
runner_args=None, screenshots_path=None, server_root=None):
jsbridge_port = jsbridge.find_port()
# select runner and profile class for the given app
try:
runner_class = mozrunner.runners[app]
profile_class = get_app_context(app).profile_class
except KeyError:
msg = 'Application "%s" unknown (should be one of %s)'
raise NotImplementedError(msg % (app, mozrunner.runners.keys()))
# get the necessary arguments to construct the profile and
# runner instance
profile_args = copy.deepcopy(profile_args) or {}
profile_args.setdefault('addons', []).extend(ADDONS)
preferences = profile_args.setdefault('preferences', {})
if isinstance(preferences, dict):
# Bug 695026 - Re-enable e10s when fully supported
preferences['browser.tabs.remote.autostart'] = False
preferences['browser.displayedE10SPrompt'] = 5
# Bug 1081996: Separate fixes for each e10s testing duration
for i in range(1, 10):
preferences['browser.tabs.remote.autostart.%s' % i] = False
preferences['browser.displayedE10SPrompt.%s' % i] = 5
preferences['browser.newtab.preload'] = False
preferences['browser.newtabpage.introShown'] = True
preferences['browser.tabs.animate'] = False
preferences['browser.uitour.enabled'] = False
preferences['extensions.jsbridge.port'] = jsbridge_port
preferences['focusmanager.testmode'] = True
elif isinstance(preferences, list):
# Bug 695026 - Re-enable e10s when fully supported
preferences.append(('browser.tabs.remote.autostart', False))
preferences.append(('browser.displayedE10SPrompt', 5))
# Bug 1081996: Separate fixes for each e10s testing duration
for i in range(1, 10):
preferences.append(('browser.tabs.remote.autostart.%s' % i, False))
preferences.append(('browser.displayedE10SPrompt.%s' % i, 5))
preferences.append(('browser.newtab.preload', False))
preferences.append(('browser.newtabpage.introShown', True))
preferences.append(('browser.tabs.animate', False))
preferences.append(('browser.uitour.enabled', False))
preferences.append(('extensions.jsbridge.port', jsbridge_port))
preferences.append(('focusmanager.testmode', True))
else:
raise Exception('Invalid type for preferences in profile_args')
# update environment variables for API usage
os.environ.update(ENVIRONMENT)
# create an equipped runner
profile = profile_class(**profile_args)
# if no binary is given, take it from the browser path env variable
binary = binary or os.environ.get('BROWSER_PATH', None)
# setup the runner
runner_args = copy.deepcopy(runner_args) or {}
runner = runner_class(binary=binary, profile=profile, **runner_args)
# create a mozmill
return cls(runner, jsbridge_port, jsbridge_timeout=jsbridge_timeout,
handlers=handlers, screenshots_path=screenshots_path,
server_root=server_root)
def __init__(self, runner, jsbridge_port,
jsbridge_timeout=JSBRIDGE_TIMEOUT, handlers=None,
screenshots_path=None, server_root=None):
"""Constructor of the Mozmill class.
Arguments:
runner -- The MozRunner instance to run the application
jsbridge_port -- The port the jsbridge server is running on
Keyword arguments:
jsbridge_timeout -- How long to wait without a jsbridge communication
handlers -- pluggable event handlers
screenshots_path -- Path where screenshots will be saved
server_root -- Path where to serve testcase files from
"""
# the MozRunner
self.runner = runner
self.server_root = server_root
self.http_server_start()
# execution parameters
self.debugger = None
self.interactive = False
# jsbridge parameters
self.jsbridge_port = jsbridge_port
self.jsbridge_timeout = jsbridge_timeout
self.bridge = self.back_channel = None
# Report data will end up here
self.results = TestResults()
# persisted data
self.persisted = {}
# state parameters
self.endRunnerCalled = False
self.running_test = {}
self.shutdownMode = {}
# crash handling parameters
self.minidump_save_path = tempfile.gettempdir()
# list of listeners and handlers
self.listeners = []
self.listener_dict = {} # by event type
self.global_listeners = []
self.handlers = []
# screenshots data
self.persisted['screenshots'] = {}
if screenshots_path:
path = os.path.abspath(screenshots_path)
if not os.path.isdir(path):
os.makedirs(path)
self.persisted['screenshots']['path'] = screenshots_path or tempfile.mkdtemp()
# setup event handlers and register listeners
self.setup_listeners()
handlers = handlers or list()
handlers.append(self.results)
self.setup_handlers(handlers)
### methods for event listeners
def setup_handlers(self, handlers):
for handler in handlers:
self.handlers.append(handler)
# make the mozmill instance available to the handler
handler.mozmill = self
if hasattr(handler, 'events'):
for event, method in handler.events().items():
self.add_listener(method, eventType=event)
if hasattr(handler, '__call__'):
self.add_global_listener(handler)
def setup_listeners(self):
self.add_listener(self.endRunner_listener,
eventType='mozmill.endRunner')
self.add_listener(self.frameworkFail_listener,
eventType='mozmill.frameworkFail')
self.add_listener(self.persist_listener,
eventType="mozmill.persist")
self.add_listener(self.screenshot_listener,
eventType='mozmill.screenshot')
self.add_listener(self.startTest_listener,
eventType='mozmill.setTest')
self.add_listener(self.shutdown_listener,
eventType='mozmill.shutdown')
def add_listener(self, callback, eventType):
self.listener_dict.setdefault(eventType, []).append(callback)
self.listeners.append((callback, {'eventType': eventType}))
def add_global_listener(self, callback):
self.global_listeners.append(callback)
def persist_listener(self, obj):
self.persisted = obj
def startTest_listener(self, test):
self.current_test = test
def frameworkFail_listener(self, obj):
self.framework_failure = obj['message']
def endRunner_listener(self, obj):
self.endRunnerCalled = True
def shutdown_listener(self, obj):
"""Listener for shutdown events.
Listen for the 'shutdown' event and set some state so
that the (Python) instance knows what to do.
Arguments:
obj -- Information about the user shutdown event. It contains the keys:
restart -- whether the application is to be restarted
user -- whether the shutdown was triggered via test JS
next -- for the restart cases, which test to run next
resetProfile -- reset the profile after shutdown
"""
self.shutdownMode = obj
def screenshot_listener(self, obj):
self.results.screenshots.append(obj)
def fire_event(self, event, obj):
"""Fire an event from the python side."""
# namespace the event
event = 'mozmill.' + event
# global listeners
for callback in self.global_listeners:
callback(event, obj)
# event listeners
for callback in self.listener_dict.get(event, []):
callback(obj)
### methods for startup
def create_network(self):
# get the bridge and the back-channel
self.back_channel, \
self.bridge = jsbridge.wait_and_create_network("127.0.0.1",
self.jsbridge_port,
self.jsbridge_timeout)
# set a timeout on jsbridge actions in order to ensure termination
self.back_channel.timeout = self.bridge.timeout = self.jsbridge_timeout
# Assign listeners to the back channel
for listener in self.listeners:
self.back_channel.add_listener(listener[0], **listener[1])
for global_listener in self.global_listeners:
self.back_channel.add_global_listener(global_listener)
def set_debugger(self, debugger_args=None, interactive=True):
"""Sets arguments for the debugger attached to the application.
Keyword arguments:
debugger_args --- Command line arguments to the debugger
(None disables the debugger)
interactive -- whether to run in interactive mode
"""
self.debugger = debugger_args
self.interactive = interactive
def start_runner(self):
"""Start the MozRunner."""
# if user restart we don't need to start the browser back up
if not self.shutdownMode.get('restart', False):
if self.shutdownMode.get('resetProfile'):
# reset the profile
self.runner.reset()
self.runner.start(debug_args=self.debugger,
interactive=self.interactive)
# set initial states for next test
self.framework_failure = None
self.shutdownMode = {}
self.endRunnerCalled = False
# create the network
self.create_network()
# fetch the application info
if not self.results.appinfo:
appinfo = self.get_appinfo()
self.results.appinfo = appinfo
# We got the application appdata path. Use it for minidump backups.
paths = appinfo.get('paths', {})
if paths:
self.minidump_save_path = os.path.join(paths['appdata'],
'Crash Reports',
'pending')
try:
frame = jsbridge.JSObject(self.bridge, js_module_frame)
# transfer persisted data
frame.persisted = self.persisted
except:
raise
# return the frame
return frame
def run_test_file(self, frame, test, name=None):
"""Run a single test file.
Arguments:
frame -- JS frame object
test -- Test object
name -- Name of test to run (if None, run all tests)
"""
try:
# set the document root
self.http_server_set_document_root(test)
frame.runTestFile(test['path'], name)
except jsbridge.ConnectionError, e:
# if the runner is restarted via JS, run this test
# again if the next is specified
nextTest = self.shutdownMode.get('next')
if not nextTest:
# if there is not a next test,
# throw the error up the chain
raise
self.handle_disconnect(e)
frame = self.run_test_file(self.start_runner(), test, nextTest)
return frame
def run(self, tests, restart=False):
"""Run all the tests.
Arguments:
tests -- Tests (array) which have to be executed
Keyword Arguments:
restart -- If True the application will be restarted between each test
"""
try:
frame = None
# run tests
tests = list(tests)
while tests:
test = tests.pop(0)
self.running_test = test
# skip test
if 'disabled' in test:
# see frame.js:events.endTest
obj = {'filename': test['path'],
'passed': 0,
'failed': 0,
'passes': [],
'fails': [],
# Bug 643480
# Should be consistent with test.__name__ ;
'name': os.path.basename(test['path']),
'skipped': True,
'skipped_reason': test['disabled']
}
self.fire_event('endTest', obj)
continue
try:
frame = self.run_test_file(frame or self.start_runner(),
test)
# If a restart is requested between each test stop the runner
# and reset the profile
if restart:
self.stop_runner()
frame = None
self.runner.reset()
except jsbridge.ConnectionError, e:
frame = None
self.handle_disconnect(e)
# stop the runner via JS when all tests were run
if frame:
self.stop_runner()
finally:
# shutdown the test harness cleanly
self.stop()
self.running_test = None
def get_appinfo(self):
"""Collect application specific information."""
app_info = { }
try:
mozmill = jsbridge.JSObject(self.bridge, js_module_mozmill)
app_info = json.loads(mozmill.getApplicationDetails())
app_info.update(mozversion.get_version(self.runner.binary))
except jsbridge.ConnectionError:
# We don't have to call report_disconnect here because
# start_runner() will handle this exception
pass
return app_info
### methods for shutting down and cleanup
def finish(self, fatal=False):
"""Do the final reporting and such."""
self.results.endtime = datetime.utcnow()
if self.results.screenshots:
print 'Screenshots saved in %s' % self.persisted['screenshots']['path']
# handle stop events
for handler in self.handlers:
if hasattr(handler, 'stop'):
handler.stop(self.results, fatal)
# setup_handlers() sets a reference to the mozmill object.
# It's not necessary anymore and has to be reset to avoid
# circular references
handler.mozmill = None
self.listeners = []
self.listener_dict = {}
self.global_listeners = []
self.handlers = []
return self.results
def check_for_crashes(self):
"""Check if crashes happened while the test was run"""
return self.runner.check_for_crashes(dump_save_path=self.minidump_save_path,
test_name=self.running_test.get('path'))
def handle_disconnect(self, e):
"""Handle a ConnectionError for the active process"""
if not self.shutdownMode:
# In case of an unexpected disconnect (e.g. crash or restart)
# give the application some seconds to quit, report the disconnect
# state, and finally hard-stop the runner
returncode = self.runner.wait(timeout=5)
if self.check_for_crashes():
self.report_disconnect('Application crashed')
return
self.report_disconnect()
self.kill_runner()
elif self.shutdownMode.get('restart'):
# When the application gets restarted it will get a new process id by
# spawning a new child process and obsoleting the former process.
# To avoid having zombie processes we have to release the old process
# by calling wait(). There has to be a timeout so we do not wait forever
# for the new pid, but the value doesn't matter because we will wait
# in create_network for a new connection within 60s. There is no need
# to wait on Windows because the IO completion ports feature is taking
# care of it internally.
if not mozinfo.isWin:
returncode = self.runner.wait(timeout=1)
else:
returncode = self.runner.returncode
# If the application hasn't been restarted (bug 974971) report it
# as a disconnect error
if returncode is not None:
self.stop_runner()
else:
# It's a JS triggered shutdown of the application. We
# have to wait until the process is gone. Otherwise we
# try to use a profile which is still in use
self.runner.wait(timeout=self.jsbridge_timeout)
def report_disconnect(self, message=None):
if message is None:
if self.runner.returncode is None:
message = 'Connection to application lost'
else:
message = 'Application unexpectedly closed'
message += ' (exit code: %s)' % self.runner.returncode
test = self.running_test
obj = {'filename': test['path'],
'passed': 0,
'failed': 1,
'passes': [],
'fails': [{
'exception': {
'message': message
}
}],
# Bug 643480
# Should be consistent with test.__name__ ;
'name': os.path.basename(test['path'])
}
# Ensure that we log this disconnect as failure
self.results.alltests.append(obj)
self.results.fails.append(obj)
self.fire_event('disconnected', message)
def stop_runner(self):
# Give a second for any callbacks to finish.
sleep(1)
# reset the shutdown mode
self.shutdownMode = {}
# quit the application via JS
# this *will* cause a disconnect error
# (not sure what the socket.error is all about)
try:
frame = jsbridge.JSObject(self.bridge, js_module_frame)
frame.shutdownApplication()
except (socket.error, jsbridge.ConnectionError):
pass
# wait for the runner to stop
self.runner.wait(timeout=self.jsbridge_timeout)
if self.runner.is_running():
raise errors.ShutdownError('client process shutdown unsuccessful')
def kill_runner(self):
# stop the back channel and bridge first
if self.back_channel:
self.back_channel.close()
self.bridge.close()
# stop the http server
self.http_server_stop()
# release objects
self.back_channel = None
self.bridge = None
# kill the runner
self.runner.stop()
def stop(self):
"""Cleanup after a run"""
# ensure you have the application info for the case
# of no tests: https://bugzilla.mozilla.org/show_bug.cgi?id=751866
# this involves starting and stopping the browser
if self.results.appinfo is None:
self.start_runner()
self.stop_runner()
# Check for remaining crashes
if self.check_for_crashes():
self.report_disconnect('Application crashed')
# stop the back channel and bridge
if self.back_channel:
self.back_channel.close()
self.bridge.close()
# stop the http server
self.http_server_stop()
# release objects
self.back_channel = None
self.bridge = None
# cleanup
if self.runner is not None:
self.runner.cleanup()
# set document root
def http_server_set_document_root(self, test):
# do no set the docroot if it was specified as a cli argument
# or the current test doesn't have the required variable
if self.server_root or 'server-root' not in test:
return
# Bug 1023790
# Need to take into account relative paths. Once bug 1023790 lands,
# all paths will be absolute so remove the else branch
if os.path.isabs(test['server-root']):
root = test['server-root']
else:
root = os.path.abspath(os.path.join(test['here'],
test['server-root']))
self.http_server.router.doc_root = root
# init and start the http server
def http_server_start(self):
# start the server
self.http_server = wptserve.server.WebTestHttpd(doc_root=self.server_root,
host='localhost',
port=0)
self.http_server.start()
# Add a custom route for POST requests to the default file_handler
self.http_server.router.register(['POST'], '*', wptserve.handlers.file_handler)
# expose the URL as a pref
self.runner.profile.set_persistent_preferences({'extensions.mozmill.baseurl':
self.http_server.get_url()})
# stop the http server
def http_server_stop(self):
if self.http_server:
self.http_server.stop()
### method for test collection
def collect_tests(path):
"""Find all tests for a given path."""
path = os.path.realpath(path)
if os.path.isfile(path):
return [path]
assert os.path.isdir(path), "Not a valid test file or directory: %s" % path
files = []
for filename in sorted(os.listdir(path)):
if filename.startswith("test"):
full = os.path.join(path, filename)
if os.path.isdir(full):
files += collect_tests(full)
else:
files.append(full)
return files
### command line interface
class CLI(mozrunner.CLI):
"""Command line interface to mozmill."""
module = "mozmill"
def __init__(self, args):
# Update environmental settings for command line usage
os.environ.update(ENVIRONMENT)
# event handler plugin names
self.handlers = {}
for handler_class in handlers.handlers():
name = getattr(handler_class, 'name', handler_class.__name__)
self.handlers[name] = handler_class
self.jsbridge_port = jsbridge.find_port()
# add and parse options
mozrunner.CLI.__init__(self, args)
# Do not allow manifests and tests specified at the same time
if self.options.manifests and self.options.tests:
self.parser.error("Options %s and %s are mutually exclusive." %
(self.parser.get_option('-t'),
self.parser.get_option('-m')))
# read tests from manifests (if any)
self.manifest = TestManifest(manifests=self.options.manifests,
strict=False)
# expand user directory and check existence for the test
for test in self.options.tests:
testpath = os.path.expanduser(test)
realpath = os.path.realpath(testpath)
if not os.path.exists(testpath):
raise Exception("Not a valid test file/directory: %s" % test)
# collect the tests
def testname(t):
if os.path.isdir(realpath):
return os.path.join(test, os.path.relpath(t, testpath))
return test
tests = [{'name': testname(t), 'path': t}
for t in collect_tests(testpath)]
self.manifest.tests.extend(tests)
# list the tests and exit if specified
if self.options.list_tests:
for test in self.manifest.tests:
print test['path']
self.parser.exit()
# instantiate event handler plugins
self.event_handlers = []
for name, handler_class in self.handlers.items():
if name in self.options.disable:
continue
handler = handlers.instantiate_handler(handler_class, self.options)
if handler is not None:
self.event_handlers.append(handler)
for handler in self.options.handlers:
# user handlers
try:
handler_class = handlers.load_handler(handler)
except BaseException as e:
self.parser.error(str(e))
_handler = handlers.instantiate_handler(handler_class,
self.options)
if _handler is not None:
self.event_handlers.append(_handler)
# if in manual mode, ensure we're interactive
if self.options.manual:
self.options.interactive = True
def add_options(self, parser):
"""Add command line options."""
group = OptionGroup(parser, 'MozRunner options')
mozrunner.CLI.add_options(self, group)
parser.add_option_group(group)
group = OptionGroup(parser, 'MozMill options')
group.add_option("-t", "--test",
dest="tests",
default=[],
action='append',
help='Run test')
group.add_option("--timeout",
dest="timeout",
type="float",
default=JSBRIDGE_TIMEOUT,
help="Seconds before harness timeout if no "
"communication is taking place")
group.add_option("--restart",
dest='restart',
action='store_true',
default=False,
help="Restart the application and reset the "
"profile between each test file")
group.add_option("-m", "--manifest",
dest='manifests',
action='append',
metavar='MANIFEST',
help='test manifest .ini file')
group.add_option('-D', '--debug', dest="debug",
action="store_true",
default=False,
help="debug mode"
)
group.add_option('--list-tests',
dest='list_tests',
action='store_true',
default=False,
help="List test files that would be run, in order")
group.add_option('--handler',
dest='handlers',
action='append',
default=[],
metavar='PATH:CLASS',
help="Specify an event handler given a file PATH "
"and the CLASS in the file")
group.add_option('--screenshots-path',
dest='screenshots_path',
metavar='PATH',
help='Path of directory to use for screenshots')
group.add_option('--server-root',
dest='server_root',
default=None,
help='Document root for serving local testcases')
if self.handlers:
group.add_option('--disable',
dest='disable',
action='append',
default=[],
metavar='HANDLER',
help="Disable a default event handler (%s)" %
','.join(self.handlers.keys()))
group.add_option('--manual', dest='manual',
action='store_true', default=False,
help="start the browser without running any tests")
parser.add_option_group(group)
# add option for included event handlers
for name, handler_class in self.handlers.items():
if hasattr(handler_class, 'add_options'):
group = OptionGroup(parser, '%s options' % name,
description=getattr(handler_class,
'__doc__', None))
handler_class.add_options(group)
parser.add_option_group(group)
def profile_args(self):
"""Setup profile settings for the profile object.
Returns arguments needed to make a profile object from
this command-line interface.
"""
profile_args = mozrunner.CLI.profile_args(self)
profile_args.setdefault('addons', []).extend(ADDONS)
# create a preferences dict whose entries will be added later
prefs = {
# Bug 695026 - Re-enable e10s when fully supported
'browser.displayedE10SPrompt': 5,
'browser.tabs.remote.autostart': False,
'browser.newtab.preload': False,
'browser.newtabpage.introShown': True,
'browser.tabs.animate': False,
'browser.uitour.enabled': False,
'extensions.jsbridge.port': self.jsbridge_port,
'focusmanager.testmode': True
}
# Bug 1081996: Separate fixes for each e10s testing duration
for i in range(1, 10):
prefs['browser.tabs.remote.autostart.%s' % i] = False
prefs['browser.displayedE10SPrompt.%s' % i] = 5
if self.options.debug:
prefs['extensions.checkCompatibility'] = False
prefs['extensions.jsbridge.log'] = True
prefs['javascript.options.strict'] = True
# add the preferences of this function to the existing ones
profile_args.setdefault('preferences', []).extend(prefs.items());
return profile_args
def command_args(self):
"""Arguments to the application to be run."""
cmdargs = mozrunner.CLI.command_args(self)
if self.options.debug and '-jsconsole' not in cmdargs:
cmdargs.append('-jsconsole')
return cmdargs
def run(self):
"""CLI front end to run mozmill."""
# make sure you have tests to run
if (not self.manifest.tests) and (not self.options.manual):
self.parser.error("No tests found. Please specify with -t or -m")
# create a Mozrunner
runner = self.create_runner()
# create an instance of MozMill
mozmill = MozMill(runner, self.jsbridge_port,
jsbridge_timeout=self.options.timeout,
handlers=self.event_handlers,
screenshots_path=self.options.screenshots_path,
server_root=self.options.server_root)
# set debugger arguments
mozmill.set_debugger(*self.debugger_arguments())
# load the mozmill + jsbridge extension but don't run any tests
# (for debugging)
if self.options.manual:
try:
mozmill.start_runner()
mozmill.runner.wait()
except (jsbridge.ConnectionError, KeyboardInterrupt):
pass
return
# run the tests
exception = None
tests = self.manifest.active_tests(**mozinfo.info)
try:
mozmill.run(tests, self.options.restart)
except:
exception_type, exception, tb = sys.exc_info()
# do whatever reporting you're going to do
results = mozmill.finish(fatal=exception is not None)
# exit on bad stuff happen
if exception:
traceback.print_exception(exception_type, exception, tb)
if exception or results.fails:
sys.exit(1)
# return results on success [currently unused]
return results
def cli(args=sys.argv[1:]):
CLI(args).run()
if __name__ == '__main__':
cli()