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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * Unit Tests for the Moodle Content Writer.
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 *
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 * @package     core_privacy
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 * @category    test
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 * @copyright   2018 Andrew Nicols <andrew@nicols.co.uk>
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 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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use \core_privacy\local\request\writer;
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/**
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 * Tests for the \core_privacy API's moodle_content_writer functionality.
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 *
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 * Note: The \core_privacy\tests\request\content_writer will be used for these tests.
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 * This content writer has additional sugar methods for fetching infromation which are not part of the standard
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 * content_writer interface.
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 *
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 * @copyright   2018 Andrew Nicols <andrew@nicols.co.uk>
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 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @coversDefaultClass \core_privacy\local\request\writer
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 */
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class writer_test extends advanced_testcase {
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    /**
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     * Ensure that the writer is cleared away as appropriate after each
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     * test.
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     */
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    public function tearDown(): void {
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        writer::reset();
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    }
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    /**
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     * Test that calling with_context multiple times will return the same write instance.
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     *
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     * @covers ::with_context
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     */
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    public function test_with_context(): void {
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        $writer = writer::with_context(\context_system::instance());
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        $this->assertSame($writer, writer::with_context(\context_system::instance()));
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    }
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    /**
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     * Test that calling with_context multiple times will return the same write instance.
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     *
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     * @covers ::with_context
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     */
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    public function test_with_context_different_context_same_instance(): void {
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        $writer = writer::with_context(\context_system::instance());
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        $this->assertSame($writer, writer::with_context(\context_user::instance(\core_user::get_user_by_username('admin')->id)));
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    }
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    /**
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     * Test that calling writer::reset() causes a new copy of the writer to be returned.
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     *
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     * @covers ::reset
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     */
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    public function test_reset(): void {
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        $writer = writer::with_context(\context_system::instance());
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        writer::reset();
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        $this->assertNotSame($writer, writer::with_context(\context_system::instance()));
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    }
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    /**
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     * Test that the export_user_preference calls the writer against the system context.
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     *
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     * @covers ::export_user_preference
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     */
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    public function test_export_user_preference_sets_system_context(): void {
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        $writer = writer::with_context(\context_user::instance(\core_user::get_user_by_username('admin')->id));
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        writer::export_user_preference('core_test', 'key', 'value', 'description');
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        $this->assertSame(\context_system::instance(), $writer->get_current_context());
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    }
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}