class RequirementsTest

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.
        $connection = Database::getConnection();
        if ($connection->driver() !== 'mysql') {
            $this->markTestSkipped("This test does not support the {$connection->driver()} database driver.");
        }
    }
    
    /**
     * Test the isolation level warning message on status page.
     */
    public function testIsolationLevelWarningNotDisplaying() : void {
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
            'access site reports',
        ]);
        $this->drupalLogin($admin_user);
        $connection = Database::getConnection();
        // 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(), "REPEATABLE-READ")]');
        $this->assertCount(1, $elements);
        // 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(), "READ-COMMITTED")]');
        $this->assertCount(1, $elements);
        // Ensure it is a not a warning.
        $this->assertStringNotContainsString('warning', $elements[0]->getParent()
            ->getParent()
            ->find('css', 'summary')
            ->getAttribute('class'));
        $specification = [
            'fields' => [
                'text' => [
                    'type' => 'text',
                    'description' => 'A text field',
                ],
            ],
        ];
        $connection->schema()
            ->createTable('test_table_without_primary_key', $specification);
        // 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' => 'The recommended level for Drupal is "READ COMMITTED". For this to work correctly, all tables must have a primary key. The following table(s) do not have a primary key: test_table_without_primary_key.',
        ]);
        $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 this to work correctly, all tables must have a primary key. The following table(s) do not have a primary key: test_table_without_primary_key.',
        ]);
        $this->assertCount(1, $elements);
        $this->assertStringStartsWith('READ-COMMITTED', $elements[0]->getParent()
            ->getText());
        // Ensure it is an error.
        $this->assertStringContainsString('error', $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) {
        $settings['databases']['default']['default']['init_commands'] = (object) [
            'value' => [
                'isolation_level' => "SET SESSION TRANSACTION ISOLATION LEVEL {$isolation_level}",
            ],
            'required' => TRUE,
        ];
        $this->writeSettings($settings);
    }

}