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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 json
import os
import socket
import threading
import time
import traceback
from .base import (Protocol,
RefTestExecutor,
RefTestImplementation,
TestharnessExecutor,
strip_server)
from .. import webdriver
from ..testrunner import Stop
webdriver = None
here = os.path.join(os.path.split(__file__)[0])
extra_timeout = 5
def do_delayed_imports():
global webdriver
import webdriver
class ServoWebDriverProtocol(Protocol):
def __init__(self, executor, browser, capabilities, **kwargs):
do_delayed_imports()
Protocol.__init__(self, executor, browser)
self.capabilities = capabilities
self.host = browser.webdriver_host
self.port = browser.webdriver_port
self.session = None
def setup(self, runner):
"""Connect to browser via WebDriver."""
self.runner = runner
url = "http://%s:%d" % (self.host, self.port)
session_started = False
try:
self.session = webdriver.Session(self.host, self.port,
extension=webdriver.servo.ServoCommandExtensions)
self.session.start()
except:
self.logger.warning(
"Connecting with WebDriver failed:\n%s" % traceback.format_exc())
else:
self.logger.debug("session started")
session_started = True
if not session_started:
self.logger.warning("Failed to connect via WebDriver")
self.executor.runner.send_message("init_failed")
else:
self.executor.runner.send_message("init_succeeded")
def teardown(self):
self.logger.debug("Hanging up on WebDriver session")
try:
self.session.end()
except:
pass
def is_alive(self):
try:
# Get a simple property over the connection
self.session.window_handle
# TODO what exception?
except Exception:
return False
return True
def after_connect(self):
pass
def wait(self):
while True:
try:
self.session.execute_async_script("")
except webdriver.TimeoutException:
pass
except (socket.timeout, IOError):
break
except Exception as e:
self.logger.error(traceback.format_exc(e))
break
def on_environment_change(self, old_environment, new_environment):
#Unset all the old prefs
self.session.extension.reset_prefs(*old_environment.get("prefs", {}).keys())
self.session.extension.set_prefs(new_environment.get("prefs", {}))
class ServoWebDriverRun(object):
def __init__(self, func, session, url, timeout, current_timeout=None):
self.func = func
self.result = None
self.session = session
self.url = url
self.timeout = timeout
self.result_flag = threading.Event()
def run(self):
executor = threading.Thread(target=self._run)
executor.start()
flag = self.result_flag.wait(self.timeout + extra_timeout)
if self.result is None:
assert not flag
self.result = False, ("EXTERNAL-TIMEOUT", None)
return self.result
def _run(self):
try:
self.result = True, self.func(self.session, self.url, self.timeout)
except webdriver.TimeoutException:
self.result = False, ("EXTERNAL-TIMEOUT", None)
except (socket.timeout, IOError):
self.result = False, ("CRASH", None)
except Exception as e:
message = getattr(e, "message", "")
if message:
message += "\n"
message += traceback.format_exc(e)
self.result = False, ("ERROR", e)
finally:
self.result_flag.set()
def timeout_func(timeout):
if timeout:
t0 = time.time()
return lambda: time.time() - t0 > timeout + extra_timeout
else:
return lambda: False
class ServoWebDriverTestharnessExecutor(TestharnessExecutor):
def __init__(self, browser, server_config, timeout_multiplier=1,
close_after_done=True, capabilities=None, debug_info=None):
TestharnessExecutor.__init__(self, browser, server_config, timeout_multiplier=1,
debug_info=None)
self.protocol = ServoWebDriverProtocol(self, browser, capabilities=capabilities)
with open(os.path.join(here, "testharness_servodriver.js")) as f:
self.script = f.read()
self.timeout = None
def on_protocol_change(self, new_protocol):
pass
def is_alive(self):
return self.protocol.is_alive()
def do_test(self, test):
url = self.test_url(test)
timeout = test.timeout * self.timeout_multiplier + extra_timeout
if timeout != self.timeout:
try:
self.protocol.session.timeouts.script = timeout
self.timeout = timeout
except IOError:
self.logger.error("Lost webdriver connection")
return Stop
success, data = ServoWebDriverRun(self.do_testharness,
self.protocol.session,
url,
timeout).run()
if success:
return self.convert_result(test, data)
return (test.result_cls(*data), [])
def do_testharness(self, session, url, timeout):
session.url = url
result = json.loads(
session.execute_async_script(
self.script % {"abs_url": url,
"url": strip_server(url),
"timeout_multiplier": self.timeout_multiplier,
"timeout": timeout * 1000}))
# Prevent leaking every page in history until Servo develops a more sane
# page cache
session.back()
return result
class TimeoutError(Exception):
pass
class ServoWebDriverRefTestExecutor(RefTestExecutor):
def __init__(self, browser, server_config, timeout_multiplier=1,
screenshot_cache=None, capabilities=None, debug_info=None):
"""Selenium WebDriver-based executor for reftests"""
RefTestExecutor.__init__(self,
browser,
server_config,
screenshot_cache=screenshot_cache,
timeout_multiplier=timeout_multiplier,
debug_info=debug_info)
self.protocol = ServoWebDriverProtocol(self, browser,
capabilities=capabilities)
self.implementation = RefTestImplementation(self)
self.timeout = None
with open(os.path.join(here, "reftest-wait_servodriver.js")) as f:
self.wait_script = f.read()
def is_alive(self):
return self.protocol.is_alive()
def do_test(self, test):
try:
result = self.implementation.run_test(test)
return self.convert_result(test, result)
except IOError:
return test.result_cls("CRASH", None), []
except TimeoutError:
return test.result_cls("TIMEOUT", None), []
except Exception as e:
message = getattr(e, "message", "")
if message:
message += "\n"
message += traceback.format_exc(e)
return test.result_cls("ERROR", message), []
def screenshot(self, test, viewport_size, dpi):
# https://github.com/w3c/wptrunner/issues/166
assert viewport_size is None
assert dpi is None
timeout = (test.timeout * self.timeout_multiplier + extra_timeout
if self.debug_info is None else None)
if self.timeout != timeout:
try:
self.protocol.session.timeouts.script = timeout
self.timeout = timeout
except IOError:
self.logger.error("Lost webdriver connection")
return Stop
return ServoWebDriverRun(self._screenshot,
self.protocol.session,
self.test_url(test),
timeout).run()
def _screenshot(self, session, url, timeout):
session.url = url
session.execute_async_script(self.wait_script)
return session.screenshot()
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