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/>.

/**

 * Unit tests for all Privacy Providers.

 *

 * @package     core_privacy

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

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

 */

namespace core_privacy\privacy;

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

use core_privacy\manager;

use core_privacy\local\metadata\collection;

use core_privacy\local\metadata\types\type;

use core_privacy\local\metadata\types\database_table;

use core_privacy\local\metadata\types\external_location;

use core_privacy\local\metadata\types\plugin_type_link;

use core_privacy\local\metadata\types\subsystem_link;

use core_privacy\local\metadata\types\user_preference;

/**

 * Unit tests for all Privacy Providers.

 *

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

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

 */

class provider_test extends \advanced_testcase {

    /**

     * Returns a list of frankenstyle names of core components (plugins and subsystems).

     *

     * @return array the array of frankenstyle component names with the relevant class name.

     */

    public function get_component_list() {

        $components = ['core' => [

            'component' => 'core',

            'classname' => manager::get_provider_classname_for_component('core')

        ]];

        // Get all plugins.

        $plugintypes = \core_component::get_plugin_types();

        foreach ($plugintypes as $plugintype => $typedir) {

            $plugins = \core_component::get_plugin_list($plugintype);

            foreach ($plugins as $pluginname => $plugindir) {

                $frankenstyle = $plugintype . '_' . $pluginname;

                $components[$frankenstyle] = [

                    'component' => $frankenstyle,

                    'classname' => manager::get_provider_classname_for_component($frankenstyle),

                ];

            }

        }

        // Get all subsystems.

        foreach (\core_component::get_core_subsystems() as $name => $path) {

            if (isset($path)) {

                $frankenstyle = 'core_' . $name;

                $components[$frankenstyle] = [

                    'component' => $frankenstyle,

                    'classname' => manager::get_provider_classname_for_component($frankenstyle),

                ];

            }

        }

        return $components;

    }

    /**

     * Test that the specified null_provider works as expected.

     *

     * @dataProvider null_provider_provider

     * @param   string  $component The name of the component.

     * @param   string  $classname The name of the class for privacy

     */

    public function test_null_provider($component, $classname) {

        $reason = $classname::get_reason();

        $this->assertIsString($reason);

        $this->assertIsString(get_string($reason, $component));

        $this->assertDebuggingNotCalled();

    }

    /**

     * Data provider for the null_provider tests.

     *

     * @return array

     */

    public function null_provider_provider() {

        return array_filter($this->get_component_list(), function($component) {

                return static::component_implements(

                    $component['classname'],

                    \core_privacy\local\metadata\null_provider::class

                );

        });

    }

    /**

     * Test that the specified metadata_provider works as expected.

     *

     * @dataProvider metadata_provider_provider

     * @param   string  $component The name of the component.

     * @param   string  $classname The name of the class for privacy

     */

    public function test_metadata_provider($component, $classname) {

        global $DB;

        $collection = new collection($component);

        $metadata = $classname::get_metadata($collection);

        $this->assertInstanceOf(collection::class, $metadata);

        $this->assertSame($collection, $metadata);

        $this->assertContainsOnlyInstancesOf(type::class, $metadata->get_collection());

        foreach ($metadata->get_collection() as $item) {

            // All items must have a valid string name.

            // Note: This is not a string identifier.

            $this->assertIsString($item->get_name());

            if ($item instanceof database_table) {

                // Check that the table is valid.

                $this->assertTrue($DB->get_manager()->table_exists($item->get_name()));

            }

            if ($item instanceof \core_privacy\local\metadata\types\plugintype_link) {

                // Check that plugin type is valid.

                $this->assertTrue(array_key_exists($item->get_name(), \core_component::get_plugin_types()));

            }

            if ($item instanceof subsystem_link) {

                // Check that core subsystem exists.

                list($plugintype, $pluginname) = \core_component::normalize_component($item->get_name());

                $this->assertEquals('core', $plugintype);

                $this->assertTrue(\core_component::is_core_subsystem($pluginname));

            }

            if ($summary = $item->get_summary()) {

                // Summary is optional, but when provided must be a valid string identifier.

                $this->assertIsString($summary);

                // Check that the string is also correctly defined.

                $this->assertIsString(get_string($summary, $component));

                $this->assertDebuggingNotCalled();

            }

            if ($fields = $item->get_privacy_fields()) {

                // Privacy fields are optional, but when provided must be a valid string identifier.

                foreach ($fields as $field => $identifier) {

                    $this->assertIsString($field);

                    $this->assertIsString($identifier);

                    // Check that the string is also correctly defined.

                    $this->assertIsString(get_string($identifier, $component));

                    $this->assertDebuggingNotCalled();

                }

            }

        }

    }

    /**

     * Test that all providers implement some form of compliant provider.

     *

     * @dataProvider get_component_list

     * @param string $component frankenstyle component name, e.g. 'mod_assign'

     * @param string $classname the fully qualified provider classname

     */

    public function test_all_providers_compliant($component, $classname) {

        $manager = new manager();

        $this->assertTrue($manager->component_is_compliant($component));

    }

    /**

     * Ensure that providers do not throw an error when processing a deleted user.

     *

     * @dataProvider    is_user_data_provider

     * @param   string  $component

     */

    public function test_component_understands_deleted_users($component) {

        $this->resetAfterTest();

        // Create a user.

        $user = $this->getDataGenerator()->create_user();

        // Delete the user and their context.

        delete_user($user);

        $usercontext = \context_user::instance($user->id);

        $usercontext->delete();

        $contextlist = manager::component_class_callback($component, \core_privacy\local\request\core_user_data_provider::class,

                'get_contexts_for_userid', [$user->id]);

        $this->assertInstanceOf(\core_privacy\local\request\contextlist::class, $contextlist);

    }

    /**

     * Ensure that providers do not throw an error when processing a deleted user.

     *

     * @dataProvider    is_user_data_provider

     * @param   string  $component

     */

    public function test_userdata_provider_implements_userlist($component) {

        $classname = manager::get_provider_classname_for_component($component);

        $this->assertTrue(is_subclass_of($classname, \core_privacy\local\request\core_userlist_provider::class));

    }

    /**

     * Data provider for the metadata\provider tests.

     *

     * @return array

     */

    public function metadata_provider_provider() {

        return array_filter($this->get_component_list(), function($component) {

                return static::component_implements(

                    $component['classname'],

                    \core_privacy\local\metadata\provider::class

                );

        });

    }

    /**

     * List of providers which implement the core_user_data_provider.

     *

     * @return array

     */

    public function is_user_data_provider() {

        return array_filter($this->get_component_list(), function($component) {

                return static::component_implements(

                    $component['classname'],

                    \core_privacy\local\request\core_user_data_provider::class

                );

        });

    }

    /**

     * Checks whether the component's provider class implements the specified interface, either directly or as a grandchild.

     *

     * @param   string  $providerclass The name of the class to test.

     * @param   string  $interface the name of the interface we want to check.

     * @return  bool    Whether the class implements the interface.

     */

    protected static function component_implements($providerclass, $interface) {

        if (class_exists($providerclass) && interface_exists($interface)) {

            return is_subclass_of($providerclass, $interface);

        }

        return false;

    }

    /**

     * Finds user fields in a table

     *

     * Returns fields that have foreign key to user table and fields that are named 'userid'.

     *

     * @param \xmldb_table $table

     * @return array

     */

    protected function get_userid_fields(\xmldb_table $table) {

        $userfields = [];

        // Find all fields that have a foreign key to 'id' field in 'user' table.

        $keys = $table->getKeys();

        foreach ($keys as $key) {

            $reffields = $key->getRefFields();

            $fields = $key->getFields();

            if ($key->getRefTable() === 'user' && count($reffields) == 1 && $reffields[0] == 'id' && count($fields) == 1) {

                $userfields[$fields[0]] = $fields[0];

            }

        }

        // Find fields with the name 'userid' even if they don't have a foreign key.

        $fields = $table->getFields();

        foreach ($fields as $field) {

            if ($field->getName() == 'userid') {

                $userfields['userid'] = 'userid';

            }

        }

        return $userfields;

    }

    /**

     * Test that all tables with user fields are covered by metadata providers

     */

    public function test_table_coverage() {

        global $DB;

        $dbman = $DB->get_manager();

        $tables = [];

        foreach ($dbman->get_install_xml_files() as $filename) {

            $xmldbfile = new \xmldb_file($filename);

            if (!$xmldbfile->loadXMLStructure()) {

                continue;

            }

            $structure = $xmldbfile->getStructure();

            $tablelist = $structure->getTables();

            foreach ($tablelist as $table) {

                if ($fields = $this->get_userid_fields($table)) {

                    $tables[$table->getName()] = '  - ' . $table->getName() . ' (' . join(', ', $fields) . ')';

                }

            }

        }

        $componentlist = $this->metadata_provider_provider();

        foreach ($componentlist as $componentarray) {

            $component = $componentarray['component'];

            $classname = $componentarray['classname'];

            $collection = new collection($component);

            $metadata = $classname::get_metadata($collection);

            foreach ($metadata->get_collection() as $item) {

                if ($item instanceof database_table) {

                    unset($tables[$item->get_name()]);

                }

            }

        }

        if ($tables) {

            $this->fail("The following tables with user fields must be covered with metadata providers: \n".

                join("\n", $tables));

        }

    }

}