<?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/>.

/**
 * PHPUnit integration tests
 *
 * @package    core
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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


/**
 * Test advanced_testcase extra features.
 *
 * @package    core
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core_phpunit_advanced_testcase extends advanced_testcase {

    public function test_debugging() {
        global $CFG;
        $this->resetAfterTest();

        debugging('hokus');
        $this->assertDebuggingCalled();
        debugging('pokus');
        $this->assertDebuggingCalled('pokus');
        debugging('pokus', DEBUG_MINIMAL);
        $this->assertDebuggingCalled('pokus', DEBUG_MINIMAL);
        $this->assertDebuggingNotCalled();

        debugging('a');
        debugging('b', DEBUG_MINIMAL);
        debugging('c', DEBUG_DEVELOPER);
        $debuggings = $this->getDebuggingMessages();
        $this->assertCount(3, $debuggings);
        $this->assertSame('a', $debuggings[0]->message);
        $this->assertSame(DEBUG_NORMAL, $debuggings[0]->level);
        $this->assertSame('b', $debuggings[1]->message);
        $this->assertSame(DEBUG_MINIMAL, $debuggings[1]->level);
        $this->assertSame('c', $debuggings[2]->message);
        $this->assertSame(DEBUG_DEVELOPER, $debuggings[2]->level);

        $this->resetDebugging();
        $this->assertDebuggingNotCalled();
        $debuggings = $this->getDebuggingMessages();
        $this->assertCount(0, $debuggings);

        set_debugging(DEBUG_NONE);
        debugging('hokus');
        $this->assertDebuggingNotCalled();
        set_debugging(DEBUG_DEVELOPER);
    }

    /**
     * @test
     *
     * Annotations are a valid PHPUnit method for running tests.  Debugging needs to support them.
     */
    public function debugging_called_with_annotation() {
        debugging('pokus', DEBUG_MINIMAL);
        $this->assertDebuggingCalled('pokus', DEBUG_MINIMAL);
    }

    public function test_set_user() {
        global $USER, $DB, $SESSION;

        $this->resetAfterTest();

        $this->assertEquals(0, $USER->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        $user = $DB->get_record('user', array('id'=>2));
        $this->assertNotEmpty($user);
        $this->setUser($user);
        $this->assertEquals(2, $USER->id);
        $this->assertEquals(2, $_SESSION['USER']->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        $USER->id = 3;
        $this->assertEquals(3, $USER->id);
        $this->assertEquals(3, $_SESSION['USER']->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        \core\session\manager::set_user($user);
        $this->assertEquals(2, $USER->id);
        $this->assertEquals(2, $_SESSION['USER']->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        $USER = $DB->get_record('user', array('id'=>1));
        $this->assertNotEmpty($USER);
        $this->assertEquals(1, $USER->id);
        $this->assertEquals(1, $_SESSION['USER']->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        $this->setUser(null);
        $this->assertEquals(0, $USER->id);
        $this->assertSame($_SESSION['USER'], $USER);
        $this->assertSame($GLOBALS['USER'], $USER);

        // Ensure session is reset after setUser, as it may contain extra info.
        $SESSION->sometestvalue = true;
        $this->setUser($user);
        $this->assertObjectNotHasAttribute('sometestvalue', $SESSION);
    }

    public function test_set_admin_user() {
        global $USER;

        $this->resetAfterTest();

        $this->setAdminUser();
        $this->assertEquals($USER->id, 2);
        $this->assertTrue(is_siteadmin());
    }

    public function test_set_guest_user() {
        global $USER;

        $this->resetAfterTest();

        $this->setGuestUser();
        $this->assertEquals($USER->id, 1);
        $this->assertTrue(isguestuser());
    }

    public function test_database_reset() {
        global $DB;

        $this->resetAfterTest();

        $this->preventResetByRollback();

        $this->assertEquals(1, $DB->count_records('course')); // Only frontpage in new site.

        // This is weird table - id is NOT a sequence here.
        $this->assertEquals(0, $DB->count_records('context_temp'));
        $DB->import_record('context_temp', array('id'=>5, 'path'=>'/1/2', 'depth'=>2));
        $record = $DB->get_record('context_temp', array());
        $this->assertEquals(5, $record->id);

        $this->assertEquals(0, $DB->count_records('user_preferences'));
        $originaldisplayid = $DB->insert_record('user_preferences', array('userid'=>2, 'name'=> 'phpunittest', 'value'=>'x'));
        $this->assertEquals(1, $DB->count_records('user_preferences'));

        $numcourses = $DB->count_records('course');
        $course = $this->getDataGenerator()->create_course();
        $this->assertEquals($numcourses + 1, $DB->count_records('course'));

        $this->assertEquals(2, $DB->count_records('user'));
        $DB->delete_records('user', array('id'=>1));
        $this->assertEquals(1, $DB->count_records('user'));

        $this->resetAllData();

        $this->assertEquals(1, $DB->count_records('course')); // Only frontpage in new site.
        $this->assertEquals(0, $DB->count_records('context_temp')); // Only frontpage in new site.

        $numcourses = $DB->count_records('course');
        $course = $this->getDataGenerator()->create_course();
        $this->assertEquals($numcourses + 1, $DB->count_records('course'));

        $displayid = $DB->insert_record('user_preferences', array('userid'=>2, 'name'=> 'phpunittest', 'value'=>'x'));
        $this->assertEquals($originaldisplayid, $displayid);

        $this->assertEquals(2, $DB->count_records('user'));
        $DB->delete_records('user', array('id'=>2));
        $user = $this->getDataGenerator()->create_user();
        $this->assertEquals(2, $DB->count_records('user'));
        $this->assertGreaterThan(2, $user->id);

        $this->resetAllData();

        $numcourses = $DB->count_records('course');
        $course = $this->getDataGenerator()->create_course();
        $this->assertEquals($numcourses + 1, $DB->count_records('course'));

        $this->assertEquals(2, $DB->count_records('user'));
        $DB->delete_records('user', array('id'=>2));

        $this->resetAllData();

        $numcourses = $DB->count_records('course');
        $course = $this->getDataGenerator()->create_course();
        $this->assertEquals($numcourses + 1, $DB->count_records('course'));

        $this->assertEquals(2, $DB->count_records('user'));
    }

    public function test_change_detection() {
        global $DB, $CFG, $COURSE, $SITE, $USER;

        $this->preventResetByRollback();
        self::resetAllData(true);

        // Database change.
        $this->assertEquals(1, $DB->get_field('user', 'confirmed', array('id'=>2)));
        $DB->set_field('user', 'confirmed', 0, array('id'=>2));
        try {
            self::resetAllData(true);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
        }
        $this->assertEquals(1, $DB->get_field('user', 'confirmed', array('id'=>2)));

        // Config change.
        $CFG->xx = 'yy';
        unset($CFG->admin);
        $CFG->rolesactive = 0;
        try {
            self::resetAllData(true);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
            $this->assertContains('xx', $e->getMessage());
            $this->assertContains('admin', $e->getMessage());
            $this->assertContains('rolesactive', $e->getMessage());
        }
        $this->assertFalse(isset($CFG->xx));
        $this->assertTrue(isset($CFG->admin));
        $this->assertEquals(1, $CFG->rolesactive);

        // _GET change.
        $_GET['__somethingthatwillnotnormallybepresent__'] = 'yy';
        self::resetAllData(true);

        $this->assertEquals(array(), $_GET);

        // _POST change.
        $_POST['__somethingthatwillnotnormallybepresent2__'] = 'yy';
        self::resetAllData(true);
        $this->assertEquals(array(), $_POST);

        // _FILES change.
        $_FILES['__somethingthatwillnotnormallybepresent3__'] = 'yy';
        self::resetAllData(true);
        $this->assertEquals(array(), $_FILES);

        // _REQUEST change.
        $_REQUEST['__somethingthatwillnotnormallybepresent4__'] = 'yy';
        self::resetAllData(true);
        $this->assertEquals(array(), $_REQUEST);

        // Silent changes.
        $_SERVER['xx'] = 'yy';
        self::resetAllData(true);
        $this->assertFalse(isset($_SERVER['xx']));

        // COURSE change.
        $SITE->id = 10;
        $COURSE = new stdClass();
        $COURSE->id = 7;
        try {
            self::resetAllData(true);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
            $this->assertEquals(1, $SITE->id);
            $this->assertSame($SITE, $COURSE);
            $this->assertSame($SITE, $COURSE);
        }

        // USER change.
        $this->setUser(2);
        try {
            self::resetAllData(true);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
            $this->assertEquals(0, $USER->id);
        }
    }

    public function test_getDataGenerator() {
        $generator = $this->getDataGenerator();
        $this->assertInstanceOf('testing_data_generator', $generator);
    }

    public function test_database_mock1() {
        global $DB;

        try {
            $DB->get_record('pokus', array());
            $this->fail('Exception expected when accessing non existent table');
        } catch (moodle_exception $e) {
            $this->assertInstanceOf('dml_exception', $e);
        }
        $DB = $this->createMock(get_class($DB));
        $this->assertNull($DB->get_record('pokus', array()));
        // Rest continues after reset.
    }

    public function test_database_mock2() {
        global $DB;

        // Now the database should be back to normal.
        $this->assertFalse($DB->get_record('user', array('id'=>9999)));
    }

    public function test_load_dataset() {
        global $DB;

        $this->resetAfterTest();

        $this->assertFalse($DB->record_exists('user', array('id'=>5)));
        $this->assertFalse($DB->record_exists('user', array('id'=>7)));
        $dataset = $this->createXMLDataSet(__DIR__.'/fixtures/sample_dataset.xml');
        $this->loadDataSet($dataset);
        $this->assertTrue($DB->record_exists('user', array('id'=>5)));
        $this->assertTrue($DB->record_exists('user', array('id'=>7)));
        $user5 = $DB->get_record('user', array('id'=>5));
        $user7 = $DB->get_record('user', array('id'=>7));
        $this->assertSame('john.doe', $user5->username);
        $this->assertSame('jane.doe', $user7->username);

        $dataset = $this->createCsvDataSet(array('user'=>__DIR__.'/fixtures/sample_dataset.csv'));
        $this->loadDataSet($dataset);
        $this->assertEquals(8, $DB->get_field('user', 'id', array('username'=>'pepa.novak')));
        $this->assertEquals(9, $DB->get_field('user', 'id', array('username'=>'bozka.novakova')));

        $data = array(
            'user' => array(
                array('username', 'email'),
                array('top.secret', 'top@example.com'),
                array('low.secret', 'low@example.com'),
            ),
        );
        $dataset = $this->createArrayDataSet($data);
        $this->loadDataSet($dataset);
        $this->assertTrue($DB->record_exists('user', array('email'=>'top@example.com')));
        $this->assertTrue($DB->record_exists('user', array('email'=>'low@example.com')));

        $data = array(
            'user' => array(
                array('username'=>'noidea', 'email'=>'noidea@example.com'),
                array('username'=>'onemore', 'email'=>'onemore@example.com'),
            ),
        );
        $dataset = $this->createArrayDataSet($data);
        $this->loadDataSet($dataset);
        $this->assertTrue($DB->record_exists('user', array('username'=>'noidea')));
        $this->assertTrue($DB->record_exists('user', array('username'=>'onemore')));
    }

    public function test_assert_time_current() {
        $this->assertTimeCurrent(time());

        $this->setCurrentTimeStart();
        $this->assertTimeCurrent(time());
        $this->waitForSecond();
        $this->assertTimeCurrent(time());
        $this->assertTimeCurrent(time()-1);

        try {
            $this->setCurrentTimeStart();
            $this->assertTimeCurrent(time()+10);
            $this->fail('Failed assert expected');
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\ExpectationFailedException', $e);
        }

        try {
            $this->setCurrentTimeStart();
            $this->assertTimeCurrent(time()-10);
            $this->fail('Failed assert expected');
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\ExpectationFailedException', $e);
        }
    }

    public function test_message_processors_reset() {
        global $DB;

        $this->resetAfterTest(true);

        // Get all processors first.
        $processors1 = get_message_processors();

        // Add a new message processor and get all processors again.
        $processor = new stdClass();
        $processor->name = 'test_processor';
        $processor->enabled = 1;
        $DB->insert_record('message_processors', $processor);

        $processors2 = get_message_processors();

        // Assert that new processor still haven't been added to the list.
        $this->assertSame($processors1, $processors2);

        // Reset message processors data.
        $processors3 = get_message_processors(false, true);
        // Now, list of processors should not be the same any more,
        // And we should have one more message processor in the list.
        $this->assertNotSame($processors1, $processors3);
        $this->assertEquals(count($processors1) + 1, count($processors3));
    }

    public function test_message_redirection() {
        $this->preventResetByRollback(); // Messaging is not compatible with transactions...
        $this->resetAfterTest(false);

        $user1 = $this->getDataGenerator()->create_user();
        $user2 = $this->getDataGenerator()->create_user();

        // Any core message will do here.
        $message1 = new \core\message\message();
        $message1->courseid          = 1;
        $message1->component         = 'moodle';
        $message1->name              = 'instantmessage';
        $message1->userfrom          = $user1;
        $message1->userto            = $user2;
        $message1->subject           = 'message subject 1';
        $message1->fullmessage       = 'message body';
        $message1->fullmessageformat = FORMAT_MARKDOWN;
        $message1->fullmessagehtml   = '<p>message body</p>';
        $message1->smallmessage      = 'small message';
        $message1->notification      = 0;

        $message2 = new \core\message\message();
        $message2->courseid          = 1;
        $message2->component         = 'moodle';
        $message2->name              = 'instantmessage';
        $message2->userfrom          = $user2;
        $message2->userto            = $user1;
        $message2->subject           = 'message subject 2';
        $message2->fullmessage       = 'message body';
        $message2->fullmessageformat = FORMAT_MARKDOWN;
        $message2->fullmessagehtml   = '<p>message body</p>';
        $message2->smallmessage      = 'small message';
        $message2->notification      = 0;

        // There should be debugging message without redirection.
        $mailsink = $this->redirectEmails();
        $mailsink->close();
        message_send($message1);
        $this->assertDebuggingCalled(null, null, 'message_send() must print debug message that messaging is disabled in phpunit tests.');

        // Sink should catch messages.
        $sink = $this->redirectMessages();
        $mid1 = message_send($message1);
        $mid2 = message_send($message2);

        $this->assertDebuggingNotCalled('message redirection must prevent debug messages from the message_send()');
        $this->assertEquals(2, $sink->count());
        $this->assertGreaterThanOrEqual(1, $mid1);
        $this->assertGreaterThanOrEqual($mid1, $mid2);

        $messages = $sink->get_messages();
        $this->assertInternalType('array', $messages);
        $this->assertCount(2, $messages);
        $this->assertEquals($mid1, $messages[0]->id);
        $this->assertEquals($message1->userto->id, $messages[0]->useridto);
        $this->assertEquals($message1->userfrom->id, $messages[0]->useridfrom);
        $this->assertEquals($message1->smallmessage, $messages[0]->smallmessage);
        $this->assertEquals($mid2, $messages[1]->id);
        $this->assertEquals($message2->userto->id, $messages[1]->useridto);
        $this->assertEquals($message2->userfrom->id, $messages[1]->useridfrom);
        $this->assertEquals($message2->smallmessage, $messages[1]->smallmessage);

        // Test resetting.
        $sink->clear();
        $messages = $sink->get_messages();
        $this->assertInternalType('array', $messages);
        $this->assertCount(0, $messages);

        message_send($message1);
        $messages = $sink->get_messages();
        $this->assertInternalType('array', $messages);
        $this->assertCount(1, $messages);

        // Test closing.
        $sink->close();
        $messages = $sink->get_messages();
        $this->assertInternalType('array', $messages);
        $this->assertCount(1, $messages, 'Messages in sink are supposed to stay there after close');

        // Test debugging is enabled again.
        message_send($message1);
        $this->assertDebuggingCalled(null, null, 'message_send() must print debug message that messaging is disabled in phpunit tests.');

        // Test invalid names and components.

        $sink = $this->redirectMessages();

        $message3 = new \core\message\message();
        $message3->courseid          = 1;
        $message3->component         = 'xxxx_yyyyy';
        $message3->name              = 'instantmessage';
        $message3->userfrom          = $user2;
        $message3->userto            = $user1;
        $message3->subject           = 'message subject 2';
        $message3->fullmessage       = 'message body';
        $message3->fullmessageformat = FORMAT_MARKDOWN;
        $message3->fullmessagehtml   = '<p>message body</p>';
        $message3->smallmessage      = 'small message';
        $message3->notification      = 0;

        $this->assertFalse(message_send($message3));
        $this->assertDebuggingCalled('Attempt to send msg from a provider xxxx_yyyyy/instantmessage '.
            'that is inactive or not allowed for the user id='.$user1->id);

        $message3->component = 'moodle';
        $message3->name      = 'yyyyyy';

        $this->assertFalse(message_send($message3));
        $this->assertDebuggingCalled('Attempt to send msg from a provider moodle/yyyyyy '.
            'that is inactive or not allowed for the user id='.$user1->id);

        message_send($message1);
        $this->assertEquals(1, $sink->count());

        // Test if sink can be carried over to next test.
        $this->assertTrue(phpunit_util::is_redirecting_messages());
        return $sink;
    }

    /**
     * @depends test_message_redirection
     */
    public function test_message_redirection_noreset($sink) {
        $this->preventResetByRollback(); // Messaging is not compatible with transactions...
        $this->resetAfterTest();

        $this->assertTrue(phpunit_util::is_redirecting_messages());
        $this->assertEquals(1, $sink->count());

        $message = new \core\message\message();
        $message->courseid          = 1;
        $message->component         = 'moodle';
        $message->name              = 'instantmessage';
        $message->userfrom          = get_admin();
        $message->userto            = get_admin();
        $message->subject           = 'message subject 1';
        $message->fullmessage       = 'message body';
        $message->fullmessageformat = FORMAT_MARKDOWN;
        $message->fullmessagehtml   = '<p>message body</p>';
        $message->smallmessage      = 'small message';
        $message->notification      = 0;

        message_send($message);
        $this->assertEquals(2, $sink->count());
    }

    /**
     * @depends test_message_redirection_noreset
     */
    public function test_message_redirection_reset() {
        $this->assertFalse(phpunit_util::is_redirecting_messages(), 'Test reset must stop message redirection.');
    }

    public function test_set_timezone() {
        global $CFG;
        $this->resetAfterTest();

        $this->assertSame('Australia/Perth', $CFG->timezone);
        $this->assertSame('Australia/Perth', date_default_timezone_get());

        $this->setTimezone('Pacific/Auckland', 'Europe/Prague');
        $this->assertSame('Pacific/Auckland', $CFG->timezone);
        $this->assertSame('Pacific/Auckland', date_default_timezone_get());

        $this->setTimezone('99', 'Europe/Prague');
        $this->assertSame('99', $CFG->timezone);
        $this->assertSame('Europe/Prague', date_default_timezone_get());

        $this->setTimezone('xxx', 'Europe/Prague');
        $this->assertSame('xxx', $CFG->timezone);
        $this->assertSame('Europe/Prague', date_default_timezone_get());

        $this->setTimezone();
        $this->assertSame('Australia/Perth', $CFG->timezone);
        $this->assertSame('Australia/Perth', date_default_timezone_get());

        try {
            $this->setTimezone('Pacific/Auckland', '');
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
        }

        try {
            $this->setTimezone('Pacific/Auckland', 'xxxx');
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
        }

        try {
            $this->setTimezone('Pacific/Auckland', null);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
        }

    }

    public function test_locale_reset() {
        global $CFG;

        $this->resetAfterTest();

        // If this fails self::resetAllData(); must be updated.
        $this->assertSame('en_AU.UTF-8', get_string('locale', 'langconfig'));
        $this->assertSame('English_Australia.1252', get_string('localewin', 'langconfig'));

        if ($CFG->ostype === 'WINDOWS') {
            $this->assertSame('English_Australia.1252', setlocale(LC_TIME, 0));
            setlocale(LC_TIME, 'English_USA.1252');
        } else {
            $this->assertSame('en_AU.UTF-8', setlocale(LC_TIME, 0));
            setlocale(LC_TIME, 'en_US.UTF-8');
        }

        try {
            self::resetAllData(true);
        } catch (Exception $e) {
            $this->assertInstanceOf('PHPUnit\Framework\Error\Warning', $e);
        }

        if ($CFG->ostype === 'WINDOWS') {
            $this->assertSame('English_Australia.1252', setlocale(LC_TIME, 0));
        } else {
            $this->assertSame('en_AU.UTF-8', setlocale(LC_TIME, 0));
        }

        if ($CFG->ostype === 'WINDOWS') {
            $this->assertSame('English_Australia.1252', setlocale(LC_TIME, 0));
            setlocale(LC_TIME, 'English_USA.1252');
        } else {
            $this->assertSame('en_AU.UTF-8', setlocale(LC_TIME, 0));
            setlocale(LC_TIME, 'en_US.UTF-8');
        }

        self::resetAllData(false);

        if ($CFG->ostype === 'WINDOWS') {
            $this->assertSame('English_Australia.1252', setlocale(LC_TIME, 0));
        } else {
            $this->assertSame('en_AU.UTF-8', setlocale(LC_TIME, 0));
        }
    }

    /**
     * This test sets a user agent and makes sure that it is cleared when the test is reset.
     */
    public function test_it_resets_useragent_after_test() {
        $this->resetAfterTest();
        $fakeagent = 'New user agent set.';

        // Sanity check: it should not be set when test begins.
        self::assertFalse(core_useragent::get_user_agent_string(), 'It should not be set at first.');

        // Set a fake useragent and check it was set properly.
        core_useragent::instance(true, $fakeagent);
        self::assertSame($fakeagent, core_useragent::get_user_agent_string(), 'It should be the forced agent.');

        // Reset test data and ansure the useragent was cleaned.
        self::resetAllData(false);
        self::assertFalse(core_useragent::get_user_agent_string(), 'It should not be set again, data was reset.');
    }
}