class RegressionTest

class RegressionTest extends DatabaseTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'node',
    'user',
  ];
  
  /**
   * Ensures that non-ASCII UTF-8 data is stored in the database properly.
   */
  public function testRegression_310447() {
    // That's a 255 character UTF-8 string.
    $job = str_repeat("é", 255);
    $this->connection
      ->insert('test')
      ->fields([
      'name' => $this->randomMachineName(),
      'age' => 20,
      'job' => $job,
    ])
      ->execute();
    $from_database = $this->connection
      ->query('SELECT [job] FROM {test} WHERE [job] = :job', [
      ':job' => $job,
    ])
      ->fetchField();
    $this->assertSame($job, $from_database, 'The database handles UTF-8 characters cleanly.');
  }
  
  /**
   * Tests the Schema::tableExists() method.
   */
  public function testDBTableExists() {
    $this->assertTrue($this->connection
      ->schema()
      ->tableExists('test'), 'Returns true for existent table.');
    $this->assertFalse($this->connection
      ->schema()
      ->tableExists('no_such_table'), 'Returns false for nonexistent table.');
  }
  
  /**
   * Tests the \Drupal\Core\Database\Schema::fieldExists() method.
   */
  public function testDBFieldExists() {
    $schema = $this->connection
      ->schema();
    $this->assertTrue($schema->fieldExists('test', 'name'), 'Returns true for existent column.');
    $this->assertFalse($schema->fieldExists('test', 'no_such_column'), 'Returns false for nonexistent column.');
  }
  
  /**
   * Tests the Schema::indexExists() method.
   */
  public function testDBIndexExists() {
    $this->assertTrue($this->connection
      ->schema()
      ->indexExists('test', 'ages'), 'Returns true for existent index.');
    $this->assertFalse($this->connection
      ->schema()
      ->indexExists('test', 'no_such_index'), 'Returns false for nonexistent index.');
  }

}