RequirementsTest.php

<?php

namespace Drupal\Tests\mysql\Functional;

use Drupal\Core\Database\Database;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests isolation level warning when the config is set in settings.php.
 *
 * @group mysql
 */
class RequirementsTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'mysql',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // The isolation_level option is only available for MySQL.
        $connectionInfo = Database::getConnectionInfo();
        if ($connectionInfo['default']['driver'] !== 'mysql') {
            $this->markTestSkipped("This test does not support the {$connectionInfo['default']['driver']} database driver.");
        }
    }
    
    /**
     * Test the isolation level warning message on status page.
     */
    public function testIsolationLevelWarningNotDisplaying() {
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
            'access site reports',
        ]);
        $this->drupalLogin($admin_user);
        // Set the isolation level to a level that produces a warning.
        $this->writeIsolationLevelSettings('REPEATABLE READ');
        // Check the message is not a warning.
        $this->drupalGet('admin/reports/status');
        $elements = $this->xpath('//details[@class="system-status-report__entry"]//div[contains(text(), :text)]', [
            ':text' => 'For the best performance and to minimize locking issues, the READ-COMMITTED',
        ]);
        $this->assertCount(1, $elements);
        $this->assertStringStartsWith('REPEATABLE-READ', $elements[0]->getParent()
            ->getText());
        // Ensure it is a warning.
        $this->assertStringContainsString('warning', $elements[0]->getParent()
            ->getParent()
            ->find('css', 'summary')
            ->getAttribute('class'));
        // Rollback the isolation level to read committed.
        $this->writeIsolationLevelSettings('READ COMMITTED');
        // Check the message is not a warning.
        $this->drupalGet('admin/reports/status');
        $elements = $this->xpath('//details[@class="system-status-report__entry"]//div[contains(text(), :text)]', [
            ':text' => 'For the best performance and to minimize locking issues, the READ-COMMITTED',
        ]);
        $this->assertCount(1, $elements);
        $this->assertStringStartsWith('READ-COMMITTED', $elements[0]->getParent()
            ->getText());
        // Ensure it is a not a warning.
        $this->assertStringNotContainsString('warning', $elements[0]->getParent()
            ->getParent()
            ->find('css', 'summary')
            ->getAttribute('class'));
    }
    
    /**
     * Writes the isolation level in settings.php.
     *
     * @param string $isolation_level
     *   The isolation level.
     */
    private function writeIsolationLevelSettings(string $isolation_level) {
        $settings['databases']['default']['default']['init_commands'] = (object) [
            'value' => [
                'isolation' => "SET SESSION TRANSACTION ISOLATION LEVEL {$isolation_level}",
            ],
            'required' => TRUE,
        ];
        $this->writeSettings($settings);
    }

}