Proyectos de Subversion Moodle

<?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/>.

/**

 * Support library for the cache PHPUnit tests.

 *

 * This file is part of Moodle's cache API, affectionately called MUC.

 * It contains the components that are requried in order to use caching.

 *

 * @package    core

 * @category   cache

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->dirroot.'/cache/locallib.php');

/**

 * Override the default cache configuration for our own maniacal purposes.

 *

 * This class was originally named cache_config_phpunittest but was renamed in 2.9

 * because it is used for both unit tests and acceptance tests.

 *

 * @since 2.9

 * @copyright 2012 Sam Hemelryk

 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_config_testing extends cache_config_writer {

    /**

     * Creates the default configuration and saves it.

     *

     * This function calls config_save, however it is safe to continue using it afterwards as this function should only ever

     * be called when there is no configuration file already.

     *

     * @param bool $forcesave If set to true then we will forcefully save the default configuration file.

     * @return true|array Returns true if the default configuration was successfully created.

     *     Returns a configuration array if it could not be saved. This is a bad situation. Check your error logs.

     */

    public static function create_default_configuration($forcesave = false) {

        global $CFG;

        // HACK ALERT.

        // We probably need to come up with a better way to create the default stores, or at least ensure 100% that the

        // default store plugins are protected from deletion.

        $writer = new self;

        $writer->configstores = self::get_default_stores();

        $writer->configdefinitions = self::locate_definitions();

        $defaultapplication = 'default_application';

        $appdefine = defined('TEST_CACHE_USING_APPLICATION_STORE') ? TEST_CACHE_USING_APPLICATION_STORE : false;

        if ($appdefine !== false && preg_match('/^[a-zA-Z][a-zA-Z0-9_]+$/', $appdefine)) {

            $expectedstore = $appdefine;

            $file = $CFG->dirroot.'/cache/stores/'.$appdefine.'/lib.php';

            $class = 'cachestore_'.$appdefine;

            if (file_exists($file)) {

                require_once($file);

            }

            if (class_exists($class) && $class::ready_to_be_used_for_testing()) {

                /* @var cache_store $class */

                $writer->configstores['test_application'] = array(

                    'name' => 'test_application',

                    'plugin' => $expectedstore,

                    'modes' => $class::get_supported_modes(),

                    'features' => $class::get_supported_features(),

                    'configuration' => $class::unit_test_configuration()

                );

                $defaultapplication = 'test_application';

            }

        }

        $writer->configmodemappings = array(

            array(

                'mode' => cache_store::MODE_APPLICATION,

                'store' => $defaultapplication,

                'sort' => -1

            ),

            array(

                'mode' => cache_store::MODE_SESSION,

                'store' => 'default_session',

                'sort' => -1

            ),

            array(

                'mode' => cache_store::MODE_REQUEST,

                'store' => 'default_request',

                'sort' => -1

            )

        );

        $writer->configlocks = array(

            'default_file_lock' => array(

                'name' => 'cachelock_file_default',

                'type' => 'cachelock_file',

                'dir' => 'filelocks',

                'default' => true

            )

        );

        $factory = cache_factory::instance();

        // We expect the cache to be initialising presently. If its not then something has gone wrong and likely

        // we are now in a loop.

        if (!$forcesave && $factory->get_state() !== cache_factory::STATE_INITIALISING) {

            return $writer->generate_configuration_array();

        }

        $factory->set_state(cache_factory::STATE_SAVING);

        $writer->config_save();

        return true;

    }

    /**

     * Returns the expected path to the configuration file.

     *

     * We override this function to add handling for $CFG->altcacheconfigpath.

     * We want to support it so that people can run unit tests against alternative cache setups.

     * However we don't want to ever make changes to the file at $CFG->altcacheconfigpath so we

     * always use dataroot and copy the alt file there as required.

     *

     * @throws cache_exception

     * @return string The absolute path

     */

    protected static function get_config_file_path() {

        global $CFG;

        // We always use this path.

        $configpath = $CFG->dataroot.'/muc/config.php';

        if (!empty($CFG->altcacheconfigpath)) {

            // No need to check we are within a test here, this is the cache config class that gets used

            // only when one of those is true.

            if  (!defined('TEST_CACHE_USING_ALT_CACHE_CONFIG_PATH') || !TEST_CACHE_USING_ALT_CACHE_CONFIG_PATH) {

                // TEST_CACHE_USING_ALT_CACHE_CONFIG_PATH has not being defined or is false, we want to use the default.

                return $configpath;

            }

            $path = $CFG->altcacheconfigpath;

            if (is_dir($path) && is_writable($path)) {

                // Its a writable directory, thats fine. Convert it to a file.

                $path = $CFG->altcacheconfigpath.'/cacheconfig.php';

            }

            if (is_readable($path)) {

                $directory = dirname($configpath);

                if ($directory !== $CFG->dataroot && !file_exists($directory)) {

                    $result = make_writable_directory($directory, false);

                    if (!$result) {

                        throw new cache_exception('ex_configcannotsave', 'cache', '', null, 'Cannot create config directory. Check the permissions on your moodledata directory.');

                    }

                }

                // We don't care that this fails but we should let the developer know.

                if (!is_readable($configpath) && !@copy($path, $configpath)) {

                    debugging('Failed to copy alt cache config file to required location');

                }

            }

        }

        // We always use the dataroot location.

        return $configpath;

    }

    /**

     * Adds a definition to the stack

     * @param string $area

     * @param array $properties

     * @param bool $addmapping By default this method adds a definition and a mapping for that definition. You can

     *    however set this to false if you only want it to add the definition and not the mapping.

     */

    public function phpunit_add_definition($area, array $properties, $addmapping = true) {

        if (!array_key_exists('overrideclass', $properties)) {

            switch ($properties['mode']) {

                case cache_store::MODE_APPLICATION:

                    $properties['overrideclass'] = 'cache_phpunit_application';

                    break;

                case cache_store::MODE_SESSION:

                    $properties['overrideclass'] = 'cache_phpunit_session';

                    break;

                case cache_store::MODE_REQUEST:

                    $properties['overrideclass'] = 'cache_phpunit_request';

                    break;

            }

        }

        $this->configdefinitions[$area] = $properties;

        if ($addmapping) {

            switch ($properties['mode']) {

                case cache_store::MODE_APPLICATION:

                    $this->phpunit_add_definition_mapping($area, 'default_application', 0);

                    break;

                case cache_store::MODE_SESSION:

                    $this->phpunit_add_definition_mapping($area, 'default_session', 0);

                    break;

                case cache_store::MODE_REQUEST:

                    $this->phpunit_add_definition_mapping($area, 'default_request', 0);

                    break;

            }

        }

    }

    /**

     * Removes a definition.

     * @param string $name

     */

    public function phpunit_remove_definition($name) {

        unset($this->configdefinitions[$name]);

    }

    /**

     * Removes the configured stores so that there are none available.

     */

    public function phpunit_remove_stores() {

        $this->configstores = array();

    }

    /**

     * Forcefully adds a file store.

     *

     * You can turn off native TTL support if you want a way to test TTL wrapper objects.

     *

     * @param string $name

     * @param bool $nativettl If false, uses fixture that turns off native TTL support

     */

    public function phpunit_add_file_store(string $name, bool $nativettl = true): void {

        if (!$nativettl) {

            require_once(__DIR__ . '/cachestore_file_with_ttl_wrappers.php');

        }

        $this->configstores[$name] = array(

            'name' => $name,

            'plugin' => 'file',

            'configuration' => array(

                'path' => ''

            ),

            'features' => 6,

            'modes' => 3,

            'mappingsonly' => false,

            'class' => $nativettl ? 'cachestore_file' : 'cachestore_file_with_ttl_wrappers',

            'default' => false,

            'lock' => 'cachelock_file_default'

        );

    }

    /**

     * Hacks the in-memory configuration for a store.

     *

     * @param string $store Name of store to edit e.g. 'default_application'

     * @param array $configchanges List of config changes

     */

    public function phpunit_edit_store_config(string $store, array $configchanges): void {

        foreach ($configchanges as $name => $value) {

            $this->configstores[$store]['configuration'][$name] = $value;

        }

    }

    /**

     * Forcefully adds a session store.

     *

     * @param string $name

     */

    public function phpunit_add_session_store($name) {

        $this->configstores[$name] = array(

            'name' => $name,

            'plugin' => 'session',

            'configuration' => array(),

            'features' => 14,

            'modes' => 2,

            'default' => true,

            'class' => 'cachestore_session',

            'lock' => 'cachelock_file_default',

        );

    }

    /**

     * Forcefully injects a definition => store mapping.

     *

     * This function does no validation, you should only be calling if it you know

     * exactly what to expect.

     *

     * @param string $definition

     * @param string $store

     * @param int $sort

     */

    public function phpunit_add_definition_mapping($definition, $store, $sort) {

        $this->configdefinitionmappings[] = array(

            'store' => $store,

            'definition' => $definition,

            'sort' => (int)$sort

        );

    }

    /**

     * Overrides the default site identifier used by the Cache API so that we can be sure of what it is.

     *

     * @return string

     */

    public function get_site_identifier() {

        global $CFG;

        return $CFG->wwwroot.'phpunit';

    }

    /**

     * Checks if the configuration file exists.

     *

     * @return bool True if it exists

     */

    public static function config_file_exists() {

        // Allow for late static binding by using static.

        $configfilepath = static::get_config_file_path();

        // Invalidate opcode php cache, so we get correct status of file.

        core_component::invalidate_opcode_php_cache($configfilepath);

        return file_exists($configfilepath);

    }

}

/**

 * Dummy object for testing cacheable object interface and interaction

 *

 * Wake from cache needs specific testing at times to ensure that during multiple

 * cache get() requests it's possible to verify that it's getting woken each time.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_dummy_object extends stdClass implements cacheable_object {

    /**

     * Test property 1

     * @var string

     */

    public $property1;

    /**

     * Test property 1

     * @var string

     */

    public $property2;

    /**

     * Test property time for verifying wake is run at each get() call.

     * @var float

     */

    public $propertytime;

    /**

     * Constructor

     * @param string $property1

     * @param string $property2

     */

    public function __construct($property1, $property2, $propertytime = null) {

        $this->property1 = $property1;

        $this->property2 = $property2;

        $this->propertytime = $propertytime === null ? microtime(true) : $propertytime;

    }

    /**

     * Prepares this object for caching

     * @return array

     */

    public function prepare_to_cache() {

        return array($this->property1.'_ptc', $this->property2.'_ptc', $this->propertytime);

    }

    /**

     * Returns this object from the cache

     * @param array $data

     * @return cache_phpunit_dummy_object

     */

    public static function wake_from_cache($data) {

        $time = null;

        if (!is_null($data[2])) {

            // Windows 32bit microtime() resolution is 15ms, we ensure the time has moved forward.

            do {

                $time = microtime(true);

            } while ($time == $data[2]);

        }

        return new cache_phpunit_dummy_object(array_shift($data).'_wfc', array_shift($data).'_wfc', $time);

    }

}

/**

 * Dummy data source object for testing data source interface and implementation

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_dummy_datasource implements cache_data_source {

    /**

     * Returns an instance of this object for use with the cache.

     *

     * @param cache_definition $definition

     * @return cache_phpunit_dummy_datasource

     */

    public static function get_instance_for_cache(cache_definition $definition) {

        return new cache_phpunit_dummy_datasource();

    }

    /**

     * Loads a key for the cache.

     *

     * @param string $key

     * @return string

     */

    public function load_for_cache($key) {

        return $key.' has no value really.';

    }

    /**

     * Loads many keys for the cache

     *

     * @param array $keys

     * @return array

     */

    public function load_many_for_cache(array $keys) {

        $return = array();

        foreach ($keys as $key) {

            $return[$key] = $key.' has no value really.';

        }

        return $return;

    }

}

/**

 * PHPUnit application cache loader.

 *

 * Used to expose things we could not otherwise see within an application cache.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_application extends cache_application {

    /**

     * Returns the class of the store immediately associated with this cache.

     * @return string

     */

    public function phpunit_get_store_class() {

        return get_class($this->get_store());

    }

    /**

     * Returns all the interfaces the cache store implements.

     * @return array

     */

    public function phpunit_get_store_implements() {

        return class_implements($this->get_store());

    }

    /**

     * Returns the given key directly from the static acceleration array.

     *

     * @param string $key

     * @return false|mixed

     */

    public function phpunit_static_acceleration_get($key) {

        return $this->static_acceleration_get($key);

    }

    /**

     * Purges only the static acceleration while leaving the rest of the store in tack.

     *

     * Used for behaving like you have loaded 2 pages, and reset static while the backing store

     * still contains all the same data.

     *

     */

    public function phpunit_static_acceleration_purge() {

        $this->static_acceleration_purge();

    }

}

/**

 * PHPUnit session cache loader.

 *

 * Used to expose things we could not otherwise see within an session cache.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_session extends cache_session {

    /** @var Static member used for emulating the behaviour of session_id() during the tests. */

    protected static $sessionidmockup = 'phpunitmockupsessionid';

    /**

     * Returns the class of the store immediately associated with this cache.

     * @return string

     */

    public function phpunit_get_store_class() {

        return get_class($this->get_store());

    }

    /**

     * Returns all the interfaces the cache store implements.

     * @return array

     */

    public function phpunit_get_store_implements() {

        return class_implements($this->get_store());

    }

    /**

     * Provide access to the {@link cache_session::get_key_prefix()} method.

     *

     * @return string

     */

    public function phpunit_get_key_prefix() {

        return $this->get_key_prefix();

    }

    /**

     * Allows to inject the session identifier.

     *

     * @param string $sessionid

     */

    public static function phpunit_mockup_session_id($sessionid) {

        static::$sessionidmockup = $sessionid;

    }

    /**

     * Override the parent behaviour so that it does not need the actual session_id() call.

     */

    protected function set_session_id() {

        $this->sessionid = static::$sessionidmockup;

    }

}

/**

 * PHPUnit request cache loader.

 *

 * Used to expose things we could not otherwise see within an request cache.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_request extends cache_request {

    /**

     * Returns the class of the store immediately associated with this cache.

     * @return string

     */

    public function phpunit_get_store_class() {

        return get_class($this->get_store());

    }

    /**

     * Returns all the interfaces the cache store implements.

     * @return array

     */

    public function phpunit_get_store_implements() {

        return class_implements($this->get_store());

    }

}

/**

 * Dummy overridden cache loader class that we can use to test overriding loader functionality.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_dummy_overrideclass extends cache_application {

    // Satisfying the code pre-checker is just part of my day job.

}

/**

 * Cache PHPUnit specific factory.

 *

 * @copyright  2012 Sam Hemelryk

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_factory extends cache_factory {

    /**

     * Exposes the cache_factory's disable method.

     *

     * Perhaps one day that method will be made public, for the time being it is protected.

     */

    public static function phpunit_disable() {

        parent::disable();

    }

}

/**

 * Cache PHPUnit specific Cache helper.

 *

 * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class cache_phpunit_cache extends cache {

    /**

     * Make the changes which simulate a new request within the cache.

     * This essentially resets currently held static values in the class, and increments the current timestamp.

     */

    public static function simulate_new_request() {

        self::$now += 0.1;

        self::$purgetoken = null;

    }

}