Source code for cfme.utils.appliance.implementations.ui

# -*- coding: utf-8 -*-
import json
import time
from inspect import isclass
from time import sleep

import os
from cached_property import cached_property
from jsmin import jsmin
from navmazing import Navigate, NavigateStep
from selenium.common.exceptions import (
    ErrorInResponseException, InvalidSwitchToTargetException,
    InvalidElementStateException, WebDriverException, UnexpectedAlertPresentException,
    NoSuchElementException, StaleElementReferenceException)
from widgetastic.browser import Browser, DefaultPlugin
from widgetastic.utils import VersionPick
from widgetastic.widget import Text, View

from cfme import exceptions
from cfme.utils.browser import manager
from cfme.utils.log import logger, create_sublogger
from cfme.utils.version import Version
from cfme.utils.wait import wait_for
from fixtures.pytest_store import store
from . import Implementation

VersionPick.VERSION_CLASS = Version

[docs]class ErrorView(View): title = Text("//body/h1") body = Text("//body/p") error_text = Text( "//h1[normalize-space(.)='Unexpected error encountered']" "/following-sibling::h3[not(fieldset)]" )
[docs] def get_rails_error(self): """Gets the displayed error messages""" if self.browser.is_displayed("//body[./h1 and ./p and ./hr and ./address]"): try: return "{}: {}".format(self.title.text, self.body.text) except NoSuchElementException: return None elif self.browser.is_displayed( "//h1[normalize-space(.)='Unexpected error encountered']"): try: return self.error_text.text except NoSuchElementException: # Just in case something goes really wrong return None return None
[docs]class MiqBrowserPlugin(DefaultPlugin): # Here we dismiss notifications as they obscure lower elements which need to be clicked on # We don't bother iterating and instead choose [0] and [1] to simplify the codepath # TODO: In the future we will store the notifications that are unread before dismissing them ENSURE_PAGE_SAFE = jsmin('''\ try { var eventNotificationsService = angular.element('#notification-app') .injector().get('eventNotifications'); eventNotificationsService.clearAll( ManageIQ.angular.eventNotificationsData.state.groups[0] ); eventNotificationsService.clearAll( ManageIQ.angular.eventNotificationsData.state.groups[1] ); } catch(err) { } function isHidden(el) {if(el === null) return true; return el.offsetParent === null;} function isDataLoading() { try { // checks whether all the data on page is loaded // actual since 5.9 return window.ManageIQ.gtl.loading; } catch(err){ // there are pages in 5.9 where that call ^^ raises error return false; }; } try { angular.element('error-modal').hide(); } catch(err) { } try { return !(ManageIQ.qe.anythingInFlight() || isDataLoading()); } catch(err) { return ( ((typeof $ === "undefined") ? true : $.active < 1) && ( !((!isHidden(document.getElementById("spinner_div"))) && isHidden(document.getElementById("lightbox_div")))) && document.readyState == "complete" && ((typeof checkMiqQE === "undefined") ? true : checkMiqQE('autofocus') < 1) && ((typeof checkMiqQE === "undefined") ? true : checkMiqQE('debounce') < 1) && ((typeof checkAllMiqQE === "undefined") ? true : checkAllMiqQE() < 1) && ! isDataLoading() ); } ''') OBSERVED_FIELD_MARKERS = ( 'data-miq_observe', 'data-miq_observe_date', 'data-miq_observe_checkbox', ) DEFAULT_WAIT = .8
[docs] def make_document_focused(self): if self.browser.browser_type != 'firefox': return if not self.browser.execute_script('return document.hasFocus()'): self.logger.debug( 'Fixing firefox alert focus mess by opening and closing a new window') win = self.browser.selenium.current_window_handle self.browser.selenium.execute_script('open("about:blank")') win_h = None for win_h in self.browser.selenium.window_handles: if win != win_h: self.logger.debug('Closing the newly opened window') break self.browser.selenium.switch_to.window(win_h) self.browser.selenium.close() self.browser.selenium.switch_to.window(win) self.logger.debug('Switched back to the original window')
[docs] def ensure_page_safe(self, timeout='20s'): # THIS ONE SHOULD ALWAYS USE JAVASCRIPT ONLY, NO OTHER SELENIUM INTERACTION def _check(): result = self.browser.execute_script(self.ENSURE_PAGE_SAFE, silent=True) # TODO: Logging return bool(result) wait_for(_check, timeout=timeout, delay=0.2, silent_failure=True, very_quiet=True)
[docs] def after_keyboard_input(self, element, keyboard_input): observed_field_attr = None for attr in self.OBSERVED_FIELD_MARKERS: observed_field_attr = self.browser.get_attribute(attr, element) if observed_field_attr is not None: break else: return try: attr_dict = json.loads(observed_field_attr) interval = float(attr_dict.get('interval', self.DEFAULT_WAIT)) # Pad the detected interval, as with default_wait if interval < self.DEFAULT_WAIT: interval = self.DEFAULT_WAIT except (TypeError, ValueError): # ValueError and TypeError happens if the attribute value couldn't be decoded as JSON # ValueError also happens if interval couldn't be coerced to float # In either case, we've detected an observed text field and should wait self.logger.warning('could not parse %r', observed_field_attr) interval = self.DEFAULT_WAIT self.logger.debug('observed field detected, pausing for %.1f seconds', interval) time.sleep(interval) self.browser.plugin.ensure_page_safe() self.make_document_focused()
[docs] def before_keyboard_input(self, element, keyboard_input): # there is an issue in different dialogs # when cfme doesn't see that some input fields have been updated # this is temporary fix until we figure out real reason and fix it sleep(0.3) self.make_document_focused()
[docs]class MiqBrowser(Browser): def __init__(self, selenium, endpoint, extra_objects=None): extra_objects = extra_objects or {} extra_objects.update({ 'appliance': endpoint.owner, 'endpoint': endpoint, 'store': store, }) super(MiqBrowser, self).__init__( selenium, plugin_class=MiqBrowserPlugin, logger=create_sublogger('MiqBrowser'), extra_objects=extra_objects) self.window_handle = selenium.current_window_handle 'Opened browser %s %s', selenium.capabilities.get('browserName', 'unknown'), selenium.capabilities.get('version', 'unknown')) @property def appliance(self): return self.extra_objects['appliance']
[docs] def create_view(self, *args, **kwargs): return self.appliance.browser.create_view(*args, **kwargs)
@property def product_version(self): return self.appliance.version
[docs]def can_skip_badness_test(fn): """Decorator for setting a noop""" fn._can_skip_badness_test = True return fn
[docs]class CFMENavigateStep(NavigateStep): VIEW = None @cached_property def view(self): if self.VIEW is None: raise AttributeError('{} does not have VIEW specified'.format(type(self).__name__)) return self.create_view(self.VIEW, additional_context={'object': self.obj}) @property def appliance(self): return self.obj.appliance
[docs] def create_view(self, *args, **kwargs): return self.appliance.browser.create_view(*args, **kwargs)
[docs] def am_i_here(self): try: return self.view.is_displayed except (AttributeError, NoSuchElementException): return False
[docs] def pre_badness_check(self, _tries, *args, **go_kwargs): # check for MiqQE javascript patch on first try and patch the appliance if necessary if self.appliance.is_miqqe_patch_candidate and not self.appliance.miqqe_patch_applied: self.appliance.patch_with_miqqe() self.appliance.browser.quit_browser() _tries -= 1 self.go(_tries, *args, **go_kwargs) br = self.appliance.browser try: br.widgetastic.execute_script('miqSparkleOff();', silent=True) except: # noqa # miqSparkleOff undefined, so it's definitely off. # Or maybe it is alerts? Let's only do this when we get an exception. self.appliance.browser.widgetastic.dismiss_any_alerts() # If we went so far, let's put diapers on one more miqSparkleOff just to be sure # It can be spinning in the back try: br.widgetastic.execute_script('miqSparkleOff();', silent=True) except: # noqa pass # Check if the page is blocked with blocker_div. If yes, let's headshot the browser right # here if ( br.widgetastic.is_displayed("//div[@id='blocker_div' or @id='notification']") or br.widgetastic.is_displayed("")): logger.warning("Page was blocked with blocker div on start of navigation, recycling.") self.appliance.browser.quit_browser() self.go(_tries, *args, **go_kwargs) # Check if modal window is displayed if (br.widgetastic.is_displayed( "//div[contains(@class, 'modal-dialog') and contains(@class, 'modal-lg')]")): logger.warning("Modal window was open; closing the window") "//button[contains(@class, 'close') and contains(@data-dismiss, 'modal')]") # Check if jQuery present try: br.widgetastic.execute_script("jQuery", silent=True) except Exception as e: if "jQuery" not in str(e): logger.error("Checked for jQuery but got something different.") logger.exception(e) # Restart some workers logger.warning("Restarting UI and VimBroker workers!") with self.appliance.ssh_client as ssh: # Blow off the Vim brokers and UI workers ssh.run_rails_command("\"(MiqVimBrokerWorker.all + MiqUiWorker.all).each &:kill\"")"Waiting for web UI to come back alive.") sleep(10) # Give it some rest self.appliance.wait_for_web_ui() self.appliance.browser.quit_browser() self.appliance.browser.open_browser(url_key=self.obj.appliance.server.address()) self.go(_tries, *args, **go_kwargs) # Same with rails errors view = br.widgetastic.create_view(ErrorView) rails_e = view.get_rails_error() if rails_e is not None: logger.warning("Page was blocked by rails error, renavigating.") logger.error(rails_e) # RHEL7 top does not know -M and -a logger.debug('Top CPU consumers:') logger.debug(store.current_appliance.ssh_client.run_command( 'top -c -b -n1 | head -30').output) logger.debug('Top Memory consumers:') logger.debug(store.current_appliance.ssh_client.run_command( 'top -c -b -n1 -o "%MEM" | head -30').output) # noqa logger.debug('Managed known Providers:') logger.debug( '%r', [prov.key for prov in store.current_appliance.managed_known_providers]) self.appliance.browser.quit_browser() self.appliance.browser.open_browser() self.go(_tries, *args, **go_kwargs)
# If there is a rails error past this point, something is really awful
[docs] def check_for_badness(self, fn, _tries, nav_args, *args, **kwargs): if getattr(fn, '_can_skip_badness_test', False): # self.log_message('Op is a Nop! ({})'.format(fn.__name__)) return # TODO: Uncomment after resolving the issue in widgetastic. Shouldn't be needed though :) # if self.VIEW: # self.view.flush_widget_cache() go_kwargs = kwargs.copy() go_kwargs.update(nav_args) self.appliance.browser.open_browser(url_key=self.obj.appliance.server.address()) br = self.appliance.browser # Set this to True in the handlers below to trigger a browser restart recycle = False # Set this to True in handlers to restart evmserverd on the appliance # Includes recycling so you don't need to specify recycle = False restart_evmserverd = False try: self.pre_badness_check(_tries, *args, **go_kwargs) self.log_message( "Invoking {}, with {} and {}".format(fn.func_name, args, kwargs), level="debug") return fn(*args, **kwargs) except (KeyboardInterrupt, ValueError): # KeyboardInterrupt: Don't block this while navigating raise except UnexpectedAlertPresentException: if _tries == 1: # There was an alert, accept it and try again br.widgetastic.handle_alert(wait=0) self.go(_tries, *args, **go_kwargs) else: # There was still an alert when we tried again, shoot the browser in the head logger.debug('Unxpected alert, recycling browser') recycle = True except (ErrorInResponseException, InvalidSwitchToTargetException): # Unable to switch to the browser at all, need to recycle'Invalid browser state, recycling browser') recycle = True except exceptions.CFMEExceptionOccured as e: # We hit a Rails exception'CFME Exception occured') logger.exception(e) recycle = True except exceptions.CannotContinueWithNavigation as e: # The some of the navigation steps cannot succeed'Cannot continue with navigation due to: {}; ' 'Recycling browser'.format(str(e))) recycle = True except (NoSuchElementException, InvalidElementStateException, WebDriverException, StaleElementReferenceException) as e: # First check - if jquery is not found, there can be also another # reason why this happened so do not put the next branches in elif if isinstance(e, WebDriverException) and "jQuery" in str(e): # UI failed in some way, try recycling the browser logger.exception( "UI failed in some way, jQuery not found, (probably) recycling the browser.") recycle = True # If the page is blocked, then recycle... # TODO catches the 'About' modal resulting in nav loop if ( br.widgetastic.is_displayed("//div[@id='blocker_div' or @id='notification']") or br.widgetastic.is_displayed("")): logger.warning("Page was blocked with blocker div, recycling.") recycle = True elif br.widgetastic.is_displayed("//div[@id='exception_div']"): logger.exception("CFME Exception before force navigate started!: {}".format( br.widgetastic.text( "//div[@id='exception_div']//td[@id='maincol']/div[2]/h3[2]"))) recycle = True elif br.widgetastic.is_displayed("//body/h1[normalize-space(.)='Proxy Error']"): # 502 logger.exception("Proxy error detected. Killing browser and restarting evmserverd.") req = br.widgetastic.elements("/html/body/p[1]//a") req = br.widgetastic.text(req[0]) if req else "No request stated" reason = br.widgetastic.elements("/html/body/p[2]/strong") reason = br.widgetastic.text(reason[0]) if reason else "No reason stated""Proxy error: {} / {}".format(req, reason)) restart_evmserverd = True elif br.widgetastic.is_displayed("//body[./h1 and ./p and ./hr and ./address]"): # 503 and similar sort of errors title = br.widgetastic.text("//body/h1") body = br.widgetastic.text("//body/p") logger.exception("Application error {}: {}".format(title, body)) sleep(5) # Give it a little bit of rest recycle = True elif br.widgetastic.is_displayed("//body/div[@class='dialog' and ./h1 and ./p]"): # Rails exception detection logger.exception("Rails exception before force navigate started!: %r:%r at %r", br.widgetastic.text("//body/div[@class='dialog']/h1"), br.widgetastic.text("//body/div[@class='dialog']/p"), getattr(manager.browser, 'current_url', "error://dead-browser") ) recycle = True elif br.widgetastic.elements("//ul[@id='maintab']/li[@class='inactive']") and not\ br.widgetastic.elements("//ul[@id='maintab']/li[@class='active']/ul/li"): # If upstream and is the bottom part of menu is not displayed logger.exception("Detected glitch from BZ#1112574. HEADSHOT!") recycle = True elif not self.obj.appliance.server.logged_in(): # Session timeout or whatever like that, login screen appears. logger.exception("Looks like we are logged out. Try again.") recycle = True else: logger.error("Could not determine the reason for failing the navigation. " + " Reraising. Exception: {}".format(str(e))) logger.debug(store.current_appliance.ssh_client.run_command( 'systemctl status evmserverd').output) raise if restart_evmserverd:"evmserverd restart requested") self.appliance.restart_evm_service() self.appliance.wait_for_web_ui() self.go(_tries, *args, **go_kwargs) if recycle or restart_evmserverd: self.appliance.browser.quit_browser() logger.debug('browser killed on try {}'.format(_tries)) # If given a "start" nav destination, it won't be valid after quitting the browser self.go(_tries, *args, **go_kwargs)
[docs] @can_skip_badness_test def resetter(self, *args, **kwargs): pass
[docs] @can_skip_badness_test def pre_navigate(self, *args, **kwargs): pass
[docs] @can_skip_badness_test def post_navigate(self, *args, **kwargs): pass
[docs] def log_message(self, msg, level="debug"): class_name = self.obj.__name__ if isclass(self.obj) else self.obj.__class__.__name__ str_msg = "[UI-NAV/{}/{}]: {}".format(class_name, self._name, msg) getattr(logger, level)(str_msg)
[docs] def construct_message(self, here, resetter, view, duration, waited): str_here = "Already Here" if here else "Needed Navigation" str_resetter = "Resetter Used" if resetter else "No Resetter" str_view = "View Returned" if view else "No View Available" str_waited = "Waited on View" if waited else "No Wait on View" return "{}/{}/{}/{} (elapsed {}ms)".format( str_here, str_resetter, str_view, str_waited, duration )
[docs] def go(self, _tries=0, *args, **kwargs): nav_args = {'use_resetter': True, 'wait_for_view': False} self.log_message("Beginning Navigation...", level="info") start_time = time.time() if _tries > 2: # Need at least three tries: # 1: login_admin handles an alert or CannotContinueWithNavigation appears. # 2: Everything should work. If not, NavigationError. raise exceptions.NavigationError(self._name) _tries += 1 for arg in nav_args: if arg in kwargs: nav_args[arg] = kwargs.pop(arg) self.check_for_badness(self.pre_navigate, _tries, nav_args, *args, **kwargs) here = False resetter_used = False waited = False try: here = self.check_for_badness(self.am_i_here, _tries, nav_args, *args, **kwargs) except Exception as e: self.log_message( "Exception raised [{}] whilst checking if already here".format(e), level="error") if not here: self.log_message("Prerequisite Needed") self.prerequisite_view = self.prerequisite() try: self.check_for_badness(self.step, _tries, nav_args, *args, **kwargs) except (exceptions.CandidateNotFound, exceptions.ItemNotFound) as e: self.log_message( "Item/Tree Exception raised [{}] whilst running step, trying refresh" .format(e), level="error" ) self.appliance.browser.widgetastic.refresh() self.check_for_badness(self.step, _tries, nav_args, *args, **kwargs) if nav_args['use_resetter']: resetter_used = True self.check_for_badness(self.resetter, _tries, nav_args, *args, **kwargs) self.check_for_badness(self.post_navigate, _tries, nav_args, *args, **kwargs) view = self.view if self.VIEW is not None else None duration = int((time.time() - start_time) * 1000) if view and nav_args['wait_for_view'] and not os.environ.get( 'DISABLE_NAVIGATE_ASSERT', False): waited = True wait_for( lambda: view.is_displayed, num_sec=10, message="Waiting for view [{}] to display".format(view.__class__.__name__) ) self.log_message( self.construct_message(here, resetter_used, view, duration, waited), level="info" ) return view
navigator = Navigate() navigate_to = navigator.navigate
[docs]class ViaUI(Implementation): """UI implementation using the normal ux""" name = "UI" def __str__(self): return 'UI' @cached_property def widgetastic(self): """This gives us a widgetastic browser.""" browser = self.open_browser(url_key=self.appliance.server.address()) wt = MiqBrowser(browser, self) manager.add_cleanup(self._reset_cache) return wt