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<?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\DriverException;
use Behat\Mink\Exception\ExpectationException;
use Behat\Mink\Exception\ElementNotFoundException;
use Behat\Mink\Element\NodeElement;
use Behat\Mink\Element\Element;
use Behat\Mink\Session;
require_once(__DIR__ . '/classes/component_named_selector.php');
require_once(__DIR__ . '/classes/component_named_replacement.php');
/**
* 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.
*
* @deprecated since Moodle 3.7 MDL-64979 - please use get_reduced_timeout() instead
* @todo MDL-64982 This will be deleted in Moodle 4.1
* @see behat_base::get_reduced_timeout()
*/
const REDUCED_TIMEOUT = 2;
/**
* The timeout for each Behat step (load page, wait for an element to load...).
*
* @deprecated since Moodle 3.7 MDL-64979 - please use get_timeout() instead
* @todo MDL-64982 This will be deleted in Moodle 4.1
* @see behat_base::get_timeout()
*/
const TIMEOUT = 6;
/**
* And extended timeout for specific cases.
*
* @deprecated since Moodle 3.7 MDL-64979 - please use get_extended_timeout() instead
* @todo MDL-64982 This will be deleted in Moodle 4.1
* @see behat_base::get_extended_timeout()
*/
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, $timeout = false) {
if ($selector === 'NodeElement' && is_a($locator, NodeElement::class)) {
// Support a NodeElement being passed in for use in step chaining.
return $locator;
}
// 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 $container Restrict the search to just children of the specified container
* @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, $container = 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, $exceptionlocator);
}
// How much we will be waiting for the element to appear.
if (!$timeout) {
$timeout = self::get_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;
}
// Normalise the values in order to perform the search.
[
'selector' => $selector,
'locator' => $locator,
'container' => $container,
] = $this->normalise_selector($selector, $locator, $container ?: $this->getSession()->getPage());
// Waits for the node to appear if it exists, otherwise will timeout and throw the provided exception.
return $this->spin(
function() use ($selector, $locator, $container) {
return $container->findAll($selector, $locator);
}, [], $timeout, $exception, $microsleep
);
}
/**
* Normalise the locator and selector.
*
* @param string $selector The type of thing to search
* @param mixed $locator The locator value. Can be an array, but is more likely a string.
* @param Element $container An optional container to search within
* @return array The selector, locator, and container to search within
*/
public function normalise_selector(string $selector, $locator, Element $container): array {
// Check for specific transformations for this selector type.
$transformfunction = "transform_find_for_{$selector}";
if (method_exists('behat_selectors', $transformfunction)) {
// A selector-specific transformation exists.
// Perform initial transformation of the selector within the current container.
[
'selector' => $selector,
'locator' => $locator,
'container' => $container,
] = behat_selectors::{$transformfunction}($this, $locator, $container);
}
// Normalise the css and xpath selector types.
if ('css_element' === $selector) {
$selector = 'css';
} else if ('xpath_element' === $selector) {
$selector = 'xpath';
}
// Convert to a named selector where the selector type is not a known selector.
$converttonamed = !$this->getSession()->getSelectorsHandler()->isSelectorRegistered($selector);
$converttonamed = $converttonamed && 'xpath' !== $selector;
if ($converttonamed) {
if (behat_partial_named_selector::is_deprecated_selector($selector)) {
if ($replacement = behat_partial_named_selector::get_deprecated_replacement($selector)) {
error_log("The '{$selector}' selector has been replaced with {$replacement}");
$selector = $replacement;
}
} else if (behat_exact_named_selector::is_deprecated_selector($selector)) {
if ($replacement = behat_exact_named_selector::get_deprecated_replacement($selector)) {
error_log("The '{$selector}' selector has been replaced with {$replacement}");
$selector = $replacement;
}
}
$allowedpartialselectors = behat_partial_named_selector::get_allowed_selectors();
$allowedexactselectors = behat_exact_named_selector::get_allowed_selectors();
if (isset($allowedpartialselectors[$selector])) {
$locator = behat_selectors::normalise_named_selector($allowedpartialselectors[$selector], $locator);
$selector = 'named_partial';
} else if (isset($allowedexactselectors[$selector])) {
$locator = behat_selectors::normalise_named_selector($allowedexactselectors[$selector], $locator);
$selector = 'named_exact';
} else {
throw new ExpectationException("The '{$selector}' selector type is not registered.", $this->getSession()->getDriver());
}
}
return [
'selector' => $selector,
'locator' => $locator,
'container' => $container,
];
}
/**
* 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_') {
return call_user_func_array([$this, 'find'], array_merge(
[substr($name, 5)],
$arguments
));
}
throw new coding_exception("The '{$name}' method does not exist");
}
/**
* 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::get_timeout();
}
$start = microtime(true);
$end = $start + $timeout;
do {
// 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 = $e;
}
}
if (!$this->running_javascript()) {
break;
}
usleep(100000);
} while (microtime(true) < $end);
// Using coding_exception as is a development issue if no exception has been provided.
if (!$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) {
return $this->find($selectortype, $element);
}
/**
* 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);
$locatorexceptionmsg = $element . '" in the "' . $containerelement. '" "' . $containerselectortype. '"';
$exception = new ElementNotFoundException($this->getSession(), $selectortype, null, $locatorexceptionmsg);
return $this->find($selectortype, $element, $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());
}
[
'selector' => $selector,
'locator' => $locator,
] = $this->normalise_selector($selectortype, $element, $this->getSession()->getPage());
return [$selector, $locator];
}
/**
* 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';
}
/**
* Checks if the current page is part of the mobile app.
*
* @return bool True if it's in the app
*/
protected function is_in_app() : bool {
// Cannot be in the app if there's no @app tag on scenario.
if (!$this->has_tag('app')) {
return false;
}
// Check on page to see if it's an app page. Safest way is to look for added JavaScript.
return $this->getSession()->evaluateScript('typeof window.behat') === 'object';
}
/**
* Spins around an element until it exists
*
* @throws ExpectationException
* @param string $locator
* @param string $selectortype
* @return void
*/
protected function ensure_element_exists($locator, $selectortype) {
// Exception if it timesout and the element is still there.
$msg = "The '{$locator}' element does not exist and should";
$exception = new ExpectationException($msg, $this->getSession());
// Normalise the values in order to perform the search.
[
'selector' => $selector,
'locator' => $locator,
'container' => $container,
] = $this->normalise_selector($selectortype, $locator, $this->getSession()->getPage());
// It will stop spinning once the find() method returns true.
$this->spin(
function() use ($selector, $locator, $container) {
if ($container->find($selector, $locator)) {
return true;
}
return false;
},
[],
self::get_extended_timeout(),
$exception,
true
);
}
/**
* Spins until the element does not exist
*
* @throws ExpectationException
* @param string $locator
* @param string $selectortype
* @return void
*/
protected function ensure_element_does_not_exist($locator, $selectortype) {
// Exception if it timesout and the element is still there.
$msg = "The '{$locator}' element exists and should not exist";
$exception = new ExpectationException($msg, $this->getSession());
// Normalise the values in order to perform the search.
[
'selector' => $selector,
'locator' => $locator,
'container' => $container,
] = $this->normalise_selector($selectortype, $locator, $this->getSession()->getPage());
// It will stop spinning once the find() method returns false.
$this->spin(
function() use ($selector, $locator, $container) {
if ($container->find($selector, $locator)) {
return false;
}
return true;
},
// Note: We cannot use $this because the find will then be $this->find(), which leads us to a nested spin().
// We cannot nest spins because the outer spin times out before the inner spin completes.
[],
self::get_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::get_extended_timeout(),
$exception,
true
);
}
/**
* Ensures that the provided node has a attribute value set. This step can be used to check if specific
* JS has finished modifying the node.
*
* @throws ExpectationException
* @param NodeElement $node
* @param string $attribute attribute name
* @param string $attributevalue attribute value to check.
* @return void Throws an exception if it times out without the element being visible
*/
protected function ensure_node_attribute_is_set($node, $attribute, $attributevalue) {
if (!$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 $args[1]) == $args[2], and method returns true.
$this->spin(
function($context, $args) {
if ($args[0]->getAttribute($args[1]) == $args[2]) {
return true;
}
return false;
},
array($node, $attribute, $attributevalue),
self::get_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;
}
/**
* Checks if the current scenario, or its feature, has a specified tag.
*
* @param string $tag Tag to check
* @return bool True if the tag exists in scenario or feature
*/
public function has_tag(string $tag) : bool {
return array_key_exists($tag, behat_hooks::get_tags_for_scenario());
}
/**
* 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 = 1024;
$height = 768;
break;
case "medium":
$width = 1366;
$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, $height);
}
/**
* Waits for all the JS to be loaded.
*
* @return bool Whether any JS is still pending completion.
*/
public function wait_for_pending_js() {
if (!$this->running_javascript()) {
// JS is not available therefore there is nothing to wait for.
return false;
}
return static::wait_for_pending_js_in_session($this->getSession());
}
/**
* Waits for all the JS to be loaded.
*
* @param Session $session The Mink Session where JS can be run
* @return bool Whether any JS is still pending completion.
*/
public static function wait_for_pending_js_in_session(Session $session) {
// We don't use behat_base::spin() here as we don't want to end up with an exception
// if the page & JSs don't finish loading properly.
for ($i = 0; $i < self::get_extended_timeout() * 10; $i++) {
$pending = '';
try {
$jscode = trim(preg_replace('/\s+/', ' ', '
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 = $session->evaluateScript($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 caught 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 get_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::get_extended_timeout() .
' seconds. There is a Javascript error or the code is extremely slow (' . $pending .
'). If you are using a slow machine, consider setting $CFG->behat_increasetimeout.');
}
/**
* 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.
} catch (DriverException $e) {
// Same reason as above.
}
}
/**
* 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();
}
/**
* Get the actual user in the behat session (note $USER does not correspond to the behat session's user).
* @return mixed
* @throws coding_exception
*/
protected function get_session_user() {
global $DB;
$sid = $this->getSession()->getCookie('MoodleSession');
if (empty($sid)) {
throw new coding_exception('failed to get moodle session');
}
$userid = $DB->get_field('sessions', 'userid', ['sid' => $sid]);
if (empty($userid)) {
throw new coding_exception('failed to get user from seession id '.$sid);
}
return $DB->get_record('user', ['id' => $userid]);
}
/**
* Set current $USER, reset access cache.
*
* In some cases, behat will execute the code as admin but in many cases we need to set an specific user as some
* API's might rely on the logged user to take some action.
*
* @param null|int|stdClass $user user record, null or 0 means non-logged-in, positive integer means userid
*/
public static function set_user($user = null) {
global $DB;
if (is_object($user)) {
$user = clone($user);
} else if (!$user) {
// Assign valid data to admin user (some generator-related code needs a valid user).
$user = $DB->get_record('user', array('username' => 'admin'));
} else {
$user = $DB->get_record('user', array('id' => $user));
}
unset($user->description);
unset($user->access);
unset($user->preference);
// Ensure session is empty, as it may contain caches and user specific info.
\core\session\manager::init_empty_session();
\core\session\manager::set_user($user);
}
/**
* Trigger click on node via javascript instead of actually clicking on it via pointer.
*
* This function resolves the issue of nested elements with click listeners or links - in these cases clicking via
* the pointer may accidentally cause a click on the wrong element.
* Example of issue: clicking to expand navigation nodes when the config value linkadmincategories is enabled.
* @param NodeElement $node
*/
protected function js_trigger_click($node) {
if (!$this->running_javascript()) {
$node->click();
}
$this->ensure_node_is_visible($node); // Ensures hidden elements can't be clicked.
$xpath = $node->getXpath();
$driver = $this->getSession()->getDriver();
if ($driver instanceof \Moodle\BehatExtension\Driver\MoodleSelenium2Driver) {
$script = "Syn.click({{ELEMENT}})";
$driver->triggerSynScript($xpath, $script);
} else {
$driver->click($xpath);
}
}
/**
* Convert page names to URLs for steps like 'When I am on the "[page name]" page'.
*
* You should override this as appropriate for your plugin. The method
* {@link behat_navigation::resolve_core_page_url()} is a good example.
*
* Your overridden method should document the recognised page types with
* a table like this:
*
* Recognised page names are:
* | Page | Description |
*
* @param string $page name of the page, with the component name removed e.g. 'Admin notification'.
* @return moodle_url the corresponding URL.
* @throws Exception with a meaningful error message if the specified page cannot be found.
*/
protected function resolve_page_url(string $page): moodle_url {
throw new Exception('Component "' . get_class($this) .
'" does not support the generic \'When I am on the "' . $page .
'" page\' navigation step.');
}
/**
* Convert page names to URLs for steps like 'When I am on the "[identifier]" "[page type]" page'.
*
* A typical example might be:
* When I am on the "Test quiz" "mod_quiz > Responses report" page
* which would cause this method in behat_mod_quiz to be called with
* arguments 'Responses report', 'Test quiz'.
*
* You should override this as appropriate for your plugin. The method
* {@link behat_navigation::resolve_core_page_instance_url()} is a good example.
*
* Your overridden method should document the recognised page types with
* a table like this:
*
* Recognised page names are:
* | Type | identifier meaning | Description |
*
* @param string $type identifies which type of page this is, e.g. 'Attempt review'.
* @param string $identifier identifies the particular page, e.g. 'Test quiz > student > Attempt 1'.
* @return moodle_url the corresponding URL.
* @throws Exception with a meaningful error message if the specified page cannot be found.
*/
protected function resolve_page_instance_url(string $type, string $identifier): moodle_url {
throw new Exception('Component "' . get_class($this) .
'" does not support the generic \'When I am on the "' . $identifier .
'" "' . $type . '" page\' navigation step.');
}
/**
* Gets the required timeout in seconds.
*
* @param int $timeout One of the TIMEOUT constants
* @return int Actual timeout (in seconds)
*/
protected static function get_real_timeout(int $timeout) : int {
global $CFG;
if (!empty($CFG->behat_increasetimeout)) {
return $timeout * $CFG->behat_increasetimeout;
} else {
return $timeout;
}
}
/**
* Gets the default timeout.
*
* The timeout for each Behat step (load page, wait for an element to load...).
*
* @return int Timeout in seconds
*/
public static function get_timeout() : int {
return self::get_real_timeout(6);
}
/**
* Gets the reduced timeout.
*
* A reduced timeout for cases where self::get_timeout() is too much
* and a simple $this->getSession()->getPage()->find() could not
* be enough.
*
* @return int Timeout in seconds
*/
public static function get_reduced_timeout() : int {
return self::get_real_timeout(2);
}
/**
* Gets the extended timeout.
*
* A longer timeout for cases where the normal timeout is not enough.
*
* @return int Timeout in seconds
*/
public static function get_extended_timeout() : int {
return self::get_real_timeout(10);
}
/**
* Return a list of the exact named selectors for the component.
*
* Named selectors are what make Behat steps like
* Then I should see "Useful text" in the "General" "fieldset"
* work. Here, "fieldset" is the named selector, and "General" is the locator.
*
* If you override this method in your plugin (e.g. mod_mymod), to define
* new selectors specific to your plugin. For example, if you returned
* new behat_component_named_selector('Thingy',
* [".//some/xpath//img[contains(@alt, %locator%)]/.."])
* then
* Then I should see "Useful text" in the "Whatever" "mod_mymod > Thingy"
* would work.
*
* This method should return a list of {@link behat_component_named_selector} and
* the docs on that class explain how it works.
*
* @return behat_component_named_selector[]
*/
public static function get_exact_named_selectors(): array {
return [];
}
/**
* Return a list of the partial named selectors for the component.
*
* Like the exact named selectors above, but the locator only
* needs to match part of the text. For example, the standard
* "button" is a partial selector, so:
* When I click "Save" "button"
* will activate "Save changes".
*
* @return behat_component_named_selector[]
*/
public static function get_partial_named_selectors(): array {
return [];
}
/**
* Return a list of the Mink named replacements for the component.
*
* Named replacements allow you to define parts of an xpath that can be reused multiple times, or in multiple
* xpaths.
*
* This method should return a list of {@link behat_component_named_replacement} and the docs on that class explain
* how it works.
*
* @return behat_component_named_replacement[]
*/
public static function get_named_replacements(): array {
return [];
}
}