moodle/lib/behat/behat_base.php
Damyon Wiese 63e4df60f6 MDL-55839 behat: Behat fixes for theme_noname
This is a squash of many small fixes.
The list of changes are:

Initial set of behat selectors overrides required for new theme.

set core behat selectors if not overridden by theme

Remove pause

Fix for checkboxes not saving properly

Custom override for click in the user menu

Fix for behat guessing the field type.

Behat fix for guessing the correct field type.

Fix for missing closeElementBefore mforms mess.

Fix for textareas not displaying their contents.

Fix availability form element

Fix action menu selectors for activities in a course page

Fix textareas not retaining their values

Fix selector for blocks

I had to change the single select template to use an input instead of a button because of a
behat bug we have not tracked down yet.

Fix for frozen attribute in form elements

Use input instead of button while behat is still broken

Fix for navigation selector override

Behat selector fixes and multi-select fixes for templated select

Fix for configure blocks selector + booleans for autocomplete

Fixes for course_summary behat tests

Allow optgroups in single_select

Behat fixes for block_navigation

Fixes for url form element and activity chooser selectors

blocks_social - fix specific selector for behat

Fix export_for_template for selectgroups element.

Dont set empty id on the form

Fix direct call to behat_navigation in backup context

Checkbox empty value fix

Fix for assign grading panel popouts

file picker overrides to find a file manager in the page

Fix chat tests to use element name

Make selectors in mod_data behat less specific

MDL-55839: recent activity behat test relies on time()

SQUASH Honour mform element "class" attribute on the container

SQUASH Fixes for behat in mod_forum

SQUASH search form template showing value as text next to the button

SQUASH undo double selectgroup fix

SQUASH - The slightly different structure to action menus breaks course drag and drop

SQUASH Wrap loading icon in a span so the selector still works.

SQUASH Fix fragile javascript in report_loglive

SQUASH Fix tabtree, and selectgroups for mod_feedback

Also - do-not enhance the action menu - we are dropping support for this.

SQUASH Fix filemanager selector and pix_icon template for mod_forum tests.

SQUASH Fixes to breadcrumb and add formid to single select (fixes mod_glossary tests)

SQUASH lesson behat fixes. 95% of lesson styles were rubbish so they were disgarded.

SQUASH Fix lti behat tests - they were cheating and using a context step from quiz

SQUASH Behat fixes for quiz with new theme

SQUASH behat fixes for mod_wiki

SQUASH Workshop behat fixes

SQUASH Frozen form elements cannot use a readonly form element because it screws with the form JS "disabledIf" stuff.

SQUASH Fixes for grades behat tests

SQUASH behat fixes for groups

SQUASH blacklist action menu tests

SQUASH Fix for tag form element missing "manage standard tags" link

SQUASH Incomplete fixes for course behat tests

SQUASH behat fixes for badges

SQUASH Tags fixes for behat

SQUASH filepicker fixes for behat

SQUASH Abort guessing field type when we hit 'html'

SQUASH Fix for admin/tool/behat tests

SQUASH fix for admin tool behat tests

SQUASH fix for availabilty conditions hiding "aria-hidden" elements

SQUASH give the blocks more room. We get behat files because nav tree nodes are not in view

SQUASH Blocks fixed

Fix behaviour of unchecked checkboxes

SQUASH Remove incorrect step in user test

SQUASH behat fixes for course tests

Part of MDL-55071
2016-09-23 10:55:16 +01:00

893 lines
36 KiB
PHP

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Base class of all steps definitions.
*
* This script is only called from Behat as part of it's integration
* in Moodle.
*
* @package core
* @category test
* @copyright 2012 David Monllaó
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// NOTE: no MOODLE_INTERNAL test here, this file may be required by behat before including /config.php.
use Behat\Mink\Exception\ExpectationException as ExpectationException,
Behat\Mink\Exception\ElementNotFoundException as ElementNotFoundException,
Behat\Mink\Element\NodeElement as NodeElement;
/**
* Steps definitions base class.
*
* To extend by the steps definitions of the different Moodle components.
*
* It can not contain steps definitions to avoid duplicates, only utility
* methods shared between steps.
*
* @method NodeElement find_field(string $locator) Finds a form element
* @method NodeElement find_button(string $locator) Finds a form input submit element or a button
* @method NodeElement find_link(string $locator) Finds a link on a page
* @method NodeElement find_file(string $locator) Finds a forum input file element
*
* @package core
* @category test
* @copyright 2012 David Monllaó
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class behat_base extends Behat\MinkExtension\Context\RawMinkContext {
/**
* Small timeout.
*
* A reduced timeout for cases where self::TIMEOUT is too much
* and a simple $this->getSession()->getPage()->find() could not
* be enough.
*/
const REDUCED_TIMEOUT = 2;
/**
* The timeout for each Behat step (load page, wait for an element to load...).
*/
const TIMEOUT = 6;
/**
* And extended timeout for specific cases.
*/
const EXTENDED_TIMEOUT = 10;
/**
* The JS code to check that the page is ready.
*/
const PAGE_READY_JS = '(typeof M !== "undefined" && M.util && M.util.pending_js && !Boolean(M.util.pending_js.length)) && (document.readyState === "complete")';
/**
* Locates url, based on provided path.
* Override to provide custom routing mechanism.
*
* @see Behat\MinkExtension\Context\MinkContext
* @param string $path
* @return string
*/
protected function locate_path($path) {
$starturl = rtrim($this->getMinkParameter('base_url'), '/') . '/';
return 0 !== strpos($path, 'http') ? $starturl . ltrim($path, '/') : $path;
}
/**
* Returns the first matching element.
*
* @link http://mink.behat.org/#traverse-the-page-selectors
* @param string $selector The selector type (css, xpath, named...)
* @param mixed $locator It depends on the $selector, can be the xpath, a name, a css locator...
* @param Exception $exception Otherwise we throw exception with generic info
* @param NodeElement $node Spins around certain DOM node instead of the whole page
* @param int $timeout Forces a specific time out (in seconds).
* @return NodeElement
*/
protected function find($selector, $locator, $exception = false, $node = false, $timeout = false) {
// Throw exception, so dev knows it is not supported.
if ($selector === 'named') {
$exception = 'Using the "named" selector is deprecated as of 3.1. '
.' Use the "named_partial" or use the "named_exact" selector instead.';
throw new ExpectationException($exception, $this->getSession());
}
// Returns the first match.
$items = $this->find_all($selector, $locator, $exception, $node, $timeout);
return count($items) ? reset($items) : null;
}
/**
* Returns all matching elements.
*
* Adapter to Behat\Mink\Element\Element::findAll() using the spin() method.
*
* @link http://mink.behat.org/#traverse-the-page-selectors
* @param string $selector The selector type (css, xpath, named...)
* @param mixed $locator It depends on the $selector, can be the xpath, a name, a css locator...
* @param Exception $exception Otherwise we throw expcetion with generic info
* @param NodeElement $node Spins around certain DOM node instead of the whole page
* @param int $timeout Forces a specific time out (in seconds). If 0 is provided the default timeout will be applied.
* @return array NodeElements list
*/
protected function find_all($selector, $locator, $exception = false, $node = false, $timeout = false) {
// Throw exception, so dev knows it is not supported.
if ($selector === 'named') {
$exception = 'Using the "named" selector is deprecated as of 3.1. '
.' Use the "named_partial" or use the "named_exact" selector instead.';
throw new ExpectationException($exception, $this->getSession());
}
// Generic info.
if (!$exception) {
// With named selectors we can be more specific.
if (($selector == 'named_exact') || ($selector == 'named_partial')) {
$exceptiontype = $locator[0];
$exceptionlocator = $locator[1];
// If we are in a @javascript session all contents would be displayed as HTML characters.
if ($this->running_javascript()) {
$locator[1] = html_entity_decode($locator[1], ENT_NOQUOTES);
}
} else {
$exceptiontype = $selector;
$exceptionlocator = $locator;
}
$exception = new ElementNotFoundException($this->getSession(), $exceptiontype, null, $exceptionlocator);
}
$params = array('selector' => $selector, 'locator' => $locator);
// Pushing $node if required.
if ($node) {
$params['node'] = $node;
}
// How much we will be waiting for the element to appear.
if (!$timeout) {
$timeout = self::TIMEOUT;
$microsleep = false;
} else {
// Spinning each 0.1 seconds if the timeout was forced as we understand
// that is a special case and is good to refine the performance as much
// as possible.
$microsleep = true;
}
// Waits for the node to appear if it exists, otherwise will timeout and throw the provided exception.
return $this->spin(
function($context, $args) {
// If no DOM node provided look in all the page.
if (empty($args['node'])) {
return $context->getSession()->getPage()->findAll($args['selector'], $args['locator']);
}
// For nodes contained in other nodes we can not use the basic named selectors
// as they include unions and they would look for matches in the DOM root.
$elementxpath = $context->getSession()->getSelectorsHandler()->selectorToXpath($args['selector'], $args['locator']);
// Split the xpath in unions and prefix them with the container xpath.
$unions = explode('|', $elementxpath);
foreach ($unions as $key => $union) {
$union = trim($union);
// We are in the container node.
if (strpos($union, '.') === 0) {
$union = substr($union, 1);
} else if (strpos($union, '/') !== 0) {
// Adding the path separator in case it is not there.
$union = '/' . $union;
}
$unions[$key] = $args['node']->getXpath() . $union;
}
// We can not use usual Element::find() as it prefixes with DOM root.
return $context->getSession()->getDriver()->find(implode('|', $unions));
},
$params,
$timeout,
$exception,
$microsleep
);
}
/**
* Finds DOM nodes in the page using named selectors.
*
* The point of using this method instead of Mink ones is the spin
* method of behat_base::find() that looks for the element until it
* is available or it timeouts, this avoids the false failures received
* when selenium tries to execute commands on elements that are not
* ready to be used.
*
* All steps that requires elements to be available before interact with
* them should use one of the find* methods.
*
* The methods calls requires a {'find_' . $elementtype}($locator)
* format, like find_link($locator), find_select($locator),
* find_button($locator)...
*
* @link http://mink.behat.org/#named-selectors
* @throws coding_exception
* @param string $name The name of the called method
* @param mixed $arguments
* @return NodeElement
*/
public function __call($name, $arguments) {
if (substr($name, 0, 5) !== 'find_') {
throw new coding_exception('The "' . $name . '" method does not exist');
}
// Only the named selector identifier.
$cleanname = substr($name, 5);
// All named selectors shares the interface.
if (count($arguments) !== 1) {
throw new coding_exception('The "' . $cleanname . '" named selector needs the locator as it\'s single argument');
}
// Redirecting execution to the find method with the specified selector.
// It will detect if it's pointing to an unexisting named selector.
return $this->find('named_partial',
array(
$cleanname,
behat_context_helper::escape($arguments[0])
)
);
}
/**
* Escapes the double quote character.
*
* Double quote is the argument delimiter, it can be escaped
* with a backslash, but we auto-remove this backslashes
* before the step execution, this method is useful when using
* arguments as arguments for other steps.
*
* @param string $string
* @return string
*/
public function escape($string) {
return str_replace('"', '\"', $string);
}
/**
* Executes the passed closure until returns true or time outs.
*
* In most cases the document.readyState === 'complete' will be enough, but sometimes JS
* requires more time to be completely loaded or an element to be visible or whatever is required to
* perform some action on an element; this method receives a closure which should contain the
* required statements to ensure the step definition actions and assertions have all their needs
* satisfied and executes it until they are satisfied or it timeouts. Redirects the return of the
* closure to the caller.
*
* The closures requirements to work well with this spin method are:
* - Must return false, null or '' if something goes wrong
* - Must return something != false if finishes as expected, this will be the (mixed) value
* returned by spin()
*
* The arguments of the closure are mixed, use $args depending on your needs.
*
* You can provide an exception to give more accurate feedback to tests writers, otherwise the
* closure exception will be used, but you must provide an exception if the closure does not throw
* an exception.
*
* @throws Exception If it timeouts without receiving something != false from the closure
* @param Function|array|string $lambda The function to execute or an array passed to call_user_func (maps to a class method)
* @param mixed $args Arguments to pass to the closure
* @param int $timeout Timeout in seconds
* @param Exception $exception The exception to throw in case it time outs.
* @param bool $microsleep If set to true it'll sleep micro seconds rather than seconds.
* @return mixed The value returned by the closure
*/
protected function spin($lambda, $args = false, $timeout = false, $exception = false, $microsleep = false) {
// Using default timeout which is pretty high.
if (!$timeout) {
$timeout = self::TIMEOUT;
}
if ($microsleep) {
// Will sleep 1/10th of a second by default for self::TIMEOUT seconds.
$loops = $timeout * 10;
} else {
// Will sleep for self::TIMEOUT seconds.
$loops = $timeout;
}
// DOM will never change on non-javascript case; do not wait or try again.
if (!$this->running_javascript()) {
$loops = 1;
}
for ($i = 0; $i < $loops; $i++) {
// We catch the exception thrown by the step definition to execute it again.
try {
// We don't check with !== because most of the time closures will return
// direct Behat methods returns and we are not sure it will be always (bool)false
// if it just runs the behat method without returning anything $return == null.
if ($return = call_user_func($lambda, $this, $args)) {
return $return;
}
} catch (Exception $e) {
// We would use the first closure exception if no exception has been provided.
if (!$exception) {
$exception = $e;
}
// We wait until no exception is thrown or timeout expires.
continue;
}
if ($this->running_javascript()) {
if ($microsleep) {
usleep(100000);
} else {
sleep(1);
}
}
}
// Using coding_exception as is a development issue if no exception has been provided.
if (!$exception) {
$exception = new coding_exception('spin method requires an exception if the callback does not throw an exception');
}
// Throwing exception to the user.
throw $exception;
}
/**
* Gets a NodeElement based on the locator and selector type received as argument from steps definitions.
*
* Use behat_base::get_text_selector_node() for text-based selectors.
*
* @throws ElementNotFoundException Thrown by behat_base::find
* @param string $selectortype
* @param string $element
* @return NodeElement
*/
protected function get_selected_node($selectortype, $element) {
// Getting Mink selector and locator.
list($selector, $locator) = $this->transform_selector($selectortype, $element);
// Returns the NodeElement.
return $this->find($selector, $locator);
}
/**
* Gets a NodeElement based on the locator and selector type received as argument from steps definitions.
*
* @throws ElementNotFoundException Thrown by behat_base::find
* @param string $selectortype
* @param string $element
* @return NodeElement
*/
protected function get_text_selector_node($selectortype, $element) {
// Getting Mink selector and locator.
list($selector, $locator) = $this->transform_text_selector($selectortype, $element);
// Returns the NodeElement.
return $this->find($selector, $locator);
}
/**
* Gets the requested element inside the specified container.
*
* @throws ElementNotFoundException Thrown by behat_base::find
* @param mixed $selectortype The element selector type.
* @param mixed $element The element locator.
* @param mixed $containerselectortype The container selector type.
* @param mixed $containerelement The container locator.
* @return NodeElement
*/
protected function get_node_in_container($selectortype, $element, $containerselectortype, $containerelement) {
// Gets the container, it will always be text based.
$containernode = $this->get_text_selector_node($containerselectortype, $containerelement);
list($selector, $locator) = $this->transform_selector($selectortype, $element);
// Specific exception giving info about where can't we find the element.
$locatorexceptionmsg = $element . '" in the "' . $containerelement. '" "' . $containerselectortype. '"';
$exception = new ElementNotFoundException($this->getSession(), $selectortype, null, $locatorexceptionmsg);
// Looks for the requested node inside the container node.
return $this->find($selector, $locator, $exception, $containernode);
}
/**
* Transforms from step definition's argument style to Mink format.
*
* Mink has 3 different selectors css, xpath and named, where named
* selectors includes link, button, field... to simplify and group multiple
* steps in one we use the same interface, considering all link, buttons...
* at the same level as css selectors and xpath; this method makes the
* conversion from the arguments received by the steps to the selectors and locators
* required to interact with Mink.
*
* @throws ExpectationException
* @param string $selectortype It can be css, xpath or any of the named selectors.
* @param string $element The locator (or string) we are looking for.
* @return array Contains the selector and the locator expected by Mink.
*/
protected function transform_selector($selectortype, $element) {
// Here we don't know if an allowed text selector is being used.
$selectors = behat_selectors::get_allowed_selectors();
if (!isset($selectors[$selectortype])) {
throw new ExpectationException('The "' . $selectortype . '" selector type does not exist', $this->getSession());
}
return behat_selectors::get_behat_selector($selectortype, $element, $this->getSession());
}
/**
* Transforms from step definition's argument style to Mink format.
*
* Delegates all the process to behat_base::transform_selector() checking
* the provided $selectortype.
*
* @throws ExpectationException
* @param string $selectortype It can be css, xpath or any of the named selectors.
* @param string $element The locator (or string) we are looking for.
* @return array Contains the selector and the locator expected by Mink.
*/
protected function transform_text_selector($selectortype, $element) {
$selectors = behat_selectors::get_allowed_text_selectors();
if (empty($selectors[$selectortype])) {
throw new ExpectationException('The "' . $selectortype . '" selector can not be used to select text nodes', $this->getSession());
}
return $this->transform_selector($selectortype, $element);
}
/**
* Returns whether the scenario is running in a browser that can run Javascript or not.
*
* @return boolean
*/
protected function running_javascript() {
return get_class($this->getSession()->getDriver()) !== 'Behat\Mink\Driver\GoutteDriver';
}
/**
* Spins around an element until it exists
*
* @throws ExpectationException
* @param string $element
* @param string $selectortype
* @return void
*/
protected function ensure_element_exists($element, $selectortype) {
// Getting the behat selector & locator.
list($selector, $locator) = $this->transform_selector($selectortype, $element);
// Exception if it timesout and the element is still there.
$msg = 'The "' . $element . '" element does not exist and should exist';
$exception = new ExpectationException($msg, $this->getSession());
// It will stop spinning once the find() method returns true.
$this->spin(
function($context, $args) {
// We don't use behat_base::find as it is already spinning.
if ($context->getSession()->getPage()->find($args['selector'], $args['locator'])) {
return true;
}
return false;
},
array('selector' => $selector, 'locator' => $locator),
self::EXTENDED_TIMEOUT,
$exception,
true
);
}
/**
* Spins until the element does not exist
*
* @throws ExpectationException
* @param string $element
* @param string $selectortype
* @return void
*/
protected function ensure_element_does_not_exist($element, $selectortype) {
// Getting the behat selector & locator.
list($selector, $locator) = $this->transform_selector($selectortype, $element);
// Exception if it timesout and the element is still there.
$msg = 'The "' . $element . '" element exists and should not exist';
$exception = new ExpectationException($msg, $this->getSession());
// It will stop spinning once the find() method returns false.
$this->spin(
function($context, $args) {
// We don't use behat_base::find() as we are already spinning.
if (!$context->getSession()->getPage()->find($args['selector'], $args['locator'])) {
return true;
}
return false;
},
array('selector' => $selector, 'locator' => $locator),
self::EXTENDED_TIMEOUT,
$exception,
true
);
}
/**
* Ensures that the provided node is visible and we can interact with it.
*
* @throws ExpectationException
* @param NodeElement $node
* @return void Throws an exception if it times out without the element being visible
*/
protected function ensure_node_is_visible($node) {
if (!$this->running_javascript()) {
return;
}
// Exception if it timesout and the element is still there.
$msg = 'The "' . $node->getXPath() . '" xpath node is not visible and it should be visible';
$exception = new ExpectationException($msg, $this->getSession());
// It will stop spinning once the isVisible() method returns true.
$this->spin(
function($context, $args) {
if ($args->isVisible()) {
return true;
}
return false;
},
$node,
self::EXTENDED_TIMEOUT,
$exception,
true
);
}
/**
* Ensures that the provided element is visible and we can interact with it.
*
* Returns the node in case other actions are interested in using it.
*
* @throws ExpectationException
* @param string $element
* @param string $selectortype
* @return NodeElement Throws an exception if it times out without being visible
*/
protected function ensure_element_is_visible($element, $selectortype) {
if (!$this->running_javascript()) {
return;
}
$node = $this->get_selected_node($selectortype, $element);
$this->ensure_node_is_visible($node);
return $node;
}
/**
* Ensures that all the page's editors are loaded.
*
* @deprecated since Moodle 2.7 MDL-44084 - please do not use this function any more.
* @throws ElementNotFoundException
* @throws ExpectationException
* @return void
*/
protected function ensure_editors_are_loaded() {
global $CFG;
if (empty($CFG->behat_usedeprecated)) {
debugging('Function behat_base::ensure_editors_are_loaded() is deprecated. It is no longer required.');
}
return;
}
/**
* Change browser window size.
* - small: 640x480
* - medium: 1024x768
* - large: 2560x1600
*
* @param string $windowsize size of window.
* @param bool $viewport If true, changes viewport rather than window size
* @throws ExpectationException
*/
protected function resize_window($windowsize, $viewport = false) {
// Non JS don't support resize window.
if (!$this->running_javascript()) {
return;
}
switch ($windowsize) {
case "small":
$width = 640;
$height = 480;
break;
case "medium":
$width = 1024;
$height = 768;
break;
case "large":
$width = 2560;
$height = 1600;
break;
default:
preg_match('/^(\d+x\d+)$/', $windowsize, $matches);
if (empty($matches) || (count($matches) != 2)) {
throw new ExpectationException("Invalid screen size, can't resize", $this->getSession());
}
$size = explode('x', $windowsize);
$width = (int) $size[0];
$height = (int) $size[1];
}
if ($viewport) {
// When setting viewport size, we set it so that the document width will be exactly
// as specified, assuming that there is a vertical scrollbar. (In cases where there is
// no scrollbar it will be slightly wider. We presume this is rare and predictable.)
// The window inner height will be as specified, which means the available viewport will
// actually be smaller if there is a horizontal scrollbar. We assume that horizontal
// scrollbars are rare so this doesn't matter.
$offset = $this->getSession()->getDriver()->evaluateScript(
'return (function() { var before = document.body.style.overflowY;' .
'document.body.style.overflowY = "scroll";' .
'var result = {};' .
'result.x = window.outerWidth - document.body.offsetWidth;' .
'result.y = window.outerHeight - window.innerHeight;' .
'document.body.style.overflowY = before;' .
'return result; })();');
$width += $offset['x'];
$height += $offset['y'];
}
$this->getSession()->getDriver()->resizeWindow($width, $height);
}
/**
* Waits for all the JS to be loaded.
*
* @throws \Exception
* @throws NoSuchWindow
* @throws UnknownError
* @return bool True or false depending whether all the JS is loaded or not.
*/
public function wait_for_pending_js() {
// Waiting for JS is only valid for JS scenarios.
if (!$this->running_javascript()) {
return;
}
// We don't use behat_base::spin() here as we don't want to end up with an exception
// if the page & JSs don't finish loading properly.
for ($i = 0; $i < self::EXTENDED_TIMEOUT * 10; $i++) {
$pending = '';
try {
$jscode = '
return function() {
if (typeof M === "undefined") {
if (document.readyState === "complete") {
return "";
} else {
return "incomplete";
}
} else if (' . self::PAGE_READY_JS . ') {
return "";
} else if (typeof M.util !== "undefined") {
return M.util.pending_js.join(":");
} else {
return "incomplete"
}
}();';
$pending = $this->getSession()->evaluateScript($jscode);
} catch (NoSuchWindow $nsw) {
// We catch an exception here, in case we just closed the window we were interacting with.
// No javascript is running if there is no window right?
$pending = '';
} catch (UnknownError $e) {
// M is not defined when the window or the frame don't exist anymore.
if (strstr($e->getMessage(), 'M is not defined') != false) {
$pending = '';
}
}
// If there are no pending JS we stop waiting.
if ($pending === '') {
return true;
}
// 0.1 seconds.
usleep(100000);
}
// Timeout waiting for JS to complete. It will be catched and forwarded to behat_hooks::i_look_for_exceptions().
// It is unlikely that Javascript code of a page or an AJAX request needs more than self::EXTENDED_TIMEOUT seconds
// to be loaded, although when pages contains Javascript errors M.util.js_complete() can not be executed, so the
// number of JS pending code and JS completed code will not match and we will reach this point.
throw new \Exception('Javascript code and/or AJAX requests are not ready after ' . self::EXTENDED_TIMEOUT .
' seconds. There is a Javascript error or the code is extremely slow.');
}
/**
* Internal step definition to find exceptions, debugging() messages and PHP debug messages.
*
* Part of behat_hooks class as is part of the testing framework, is auto-executed
* after each step so no features will splicitly use it.
*
* @throws Exception Unknown type, depending on what we caught in the hook or basic \Exception.
* @see Moodle\BehatExtension\Tester\MoodleStepTester
*/
public function look_for_exceptions() {
// Wrap in try in case we were interacting with a closed window.
try {
// Exceptions.
$exceptionsxpath = "//div[@data-rel='fatalerror']";
// Debugging messages.
$debuggingxpath = "//div[@data-rel='debugging']";
// PHP debug messages.
$phperrorxpath = "//div[@data-rel='phpdebugmessage']";
// Any other backtrace.
$othersxpath = "(//*[contains(., ': call to ')])[1]";
$xpaths = array($exceptionsxpath, $debuggingxpath, $phperrorxpath, $othersxpath);
$joinedxpath = implode(' | ', $xpaths);
// Joined xpath expression. Most of the time there will be no exceptions, so this pre-check
// is faster than to send the 4 xpath queries for each step.
if (!$this->getSession()->getDriver()->find($joinedxpath)) {
// Check if we have recorded any errors in driver process.
$phperrors = behat_get_shutdown_process_errors();
if (!empty($phperrors)) {
foreach ($phperrors as $error) {
$errnostring = behat_get_error_string($error['type']);
$msgs[] = $errnostring . ": " .$error['message'] . " at " . $error['file'] . ": " . $error['line'];
}
$msg = "PHP errors found:\n" . implode("\n", $msgs);
throw new \Exception(htmlentities($msg));
}
return;
}
// Exceptions.
if ($errormsg = $this->getSession()->getPage()->find('xpath', $exceptionsxpath)) {
// Getting the debugging info and the backtrace.
$errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.alert-error');
// If errorinfoboxes is empty, try find alert-danger (bootstrap4) class.
if (empty($errorinfoboxes)) {
$errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.alert-danger');
}
// If errorinfoboxes is empty, try find notifytiny (original) class.
if (empty($errorinfoboxes)) {
$errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.notifytiny');
}
// If errorinfoboxes is empty, try find ajax/JS exception in dialogue.
if (empty($errorinfoboxes)) {
$errorinfoboxes = $this->getSession()->getPage()->findAll('css', 'div.moodle-exception-message');
// If ajax/JS exception.
if ($errorinfoboxes) {
$errorinfo = $this->get_debug_text($errorinfoboxes[0]->getHtml());
}
} else {
$errorinfo = $this->get_debug_text($errorinfoboxes[0]->getHtml()) . "\n" .
$this->get_debug_text($errorinfoboxes[1]->getHtml());
}
$msg = "Moodle exception: " . $errormsg->getText() . "\n" . $errorinfo;
throw new \Exception(html_entity_decode($msg));
}
// Debugging messages.
if ($debuggingmessages = $this->getSession()->getPage()->findAll('xpath', $debuggingxpath)) {
$msgs = array();
foreach ($debuggingmessages as $debuggingmessage) {
$msgs[] = $this->get_debug_text($debuggingmessage->getHtml());
}
$msg = "debugging() message/s found:\n" . implode("\n", $msgs);
throw new \Exception(html_entity_decode($msg));
}
// PHP debug messages.
if ($phpmessages = $this->getSession()->getPage()->findAll('xpath', $phperrorxpath)) {
$msgs = array();
foreach ($phpmessages as $phpmessage) {
$msgs[] = $this->get_debug_text($phpmessage->getHtml());
}
$msg = "PHP debug message/s found:\n" . implode("\n", $msgs);
throw new \Exception(html_entity_decode($msg));
}
// Any other backtrace.
// First looking through xpath as it is faster than get and parse the whole page contents,
// we get the contents and look for matches once we found something to suspect that there is a backtrace.
if ($this->getSession()->getDriver()->find($othersxpath)) {
$backtracespattern = '/(line [0-9]* of [^:]*: call to [\->&;:a-zA-Z_\x7f-\xff][\->&;:a-zA-Z0-9_\x7f-\xff]*)/';
if (preg_match_all($backtracespattern, $this->getSession()->getPage()->getContent(), $backtraces)) {
$msgs = array();
foreach ($backtraces[0] as $backtrace) {
$msgs[] = $backtrace . '()';
}
$msg = "Other backtraces found:\n" . implode("\n", $msgs);
throw new \Exception(htmlentities($msg));
}
}
} catch (NoSuchWindow $e) {
// If we were interacting with a popup window it will not exists after closing it.
}
}
/**
* Converts HTML tags to line breaks to display the info in CLI
*
* @param string $html
* @return string
*/
protected function get_debug_text($html) {
// Replacing HTML tags for new lines and keeping only the text.
$notags = preg_replace('/<+\s*\/*\s*([A-Z][A-Z0-9]*)\b[^>]*\/*\s*>*/i', "\n", $html);
return preg_replace("/(\n)+/s", "\n", $notags);
}
/**
* Helper function to execute api in a given context.
*
* @param string $contextapi context in which api is defined.
* @param array $params list of params to pass.
* @throws Exception
*/
protected function execute($contextapi, $params = array()) {
if (!is_array($params)) {
$params = array($params);
}
// Get required context and execute the api.
$contextapi = explode("::", $contextapi);
$context = behat_context_helper::get($contextapi[0]);
call_user_func_array(array($context, $contextapi[1]), $params);
// NOTE: Wait for pending js and look for exception are not optional, as this might lead to unexpected results.
// Don't make them optional for performance reasons.
// Wait for pending js.
$this->wait_for_pending_js();
// Look for exceptions.
$this->look_for_exceptions();
}
}